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TS4909
Dual mode low power 150mW stereo headphone amplifier with capacitor-less and single-ended outputs
Features

DFN10 (3x3)
No output coupling capacitors necessary Pop-and-click noise reduction circuitry Operating from VCC = 2.2V to 5.5V Standby mode active low Output power: - 158mW @5V, into 16 with 1% THD+N max (1kHz) - 52mW @3.0V into 16 with 1% THD+N max (1kHz) Ultra low current consumption: 2.0mA typ.@3V Ultra low standby consumption: 10nA typ. High signal-to-noise ratio: 105 dB typ.@5V High crosstalk immunity: 110dB (F=1kHz) for single-ended outputs PSRR: 72dB (F=1kHz), inputs grounded, for phantom ground outputs Low tWU: 50ms in PHG mode, 100ms in SE mode Available in lead-free DFN10 3x3mm
Stdby Bypass BIAS Vout3
Pin connections (top view)
Vin1 Stdby SE/PHG Bypass Vin2
1 2 3 4 5 10 9 8 7 6
Vdd Vout1 Vout3 Vout2 Gnd

Functional block diagram
Vdd SE/PHG
Vin1
Vout1
Applications

Headphone amplifier Mobile phone PDA, portable audio player
Vin2
Vout2
Gnd
Description
The TS4909 is a stereo audio amplifier designed to drive headphones in portable applications. The integrated phantom ground is a circuit topology that eliminates the heavy output coupling capacitors. This is of primary importance in portable applications where space constraints are very high. A single-ended configuration is also available, offering even lower power consumption because the phantom ground can be switched off.
Pop-and-click noise during switch-on and switchoff phases is eliminated by integrated circuitry. Specially designed for applications requiring low power supplies, the TS4909 is capable of delivering 31mW of continuous average power into a 32 load with less than 1% THD+N from a 3V power supply. Featuring an active low standby mode, the TS4909 reduces the supply current to only 10nA (typ.). The TS4909 is unity gain stable and can be configured by external gain-setting resistors.
September 2007
Rev 8
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Contents
TS4909
Contents
1 2 3 4 Typical application schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Absolute maximum ratings and operating conditions . . . . . . . . . . . . . 4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
4.1 4.2 4.3 4.4 General description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Gain using the typical application schematics . . . . . . . . . . . . . . . . . . . . . 23 Power dissipation and efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.4.1 4.4.2 4.4.3 Single-ended configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Phantom ground configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Total power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.5 4.6 4.7 4.8
Decoupling of the circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Wake-up time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Pop performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Standby mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5 6 7
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
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TS4909
Typical application schematics
1
Typical application schematics
Figure 1. Typical applications for the TS4909
Rfeed1 20k Vcc Cs 1F SE/PHG
Phantom ground configuration
Vin1 Cin1 330nF
20k Rin1 Vout1
Standby Vout3 Cb 1F Vin2 330nF Cin2 20k Rin2 Gnd Vout2 BIAS
20k Rfeed2
Rfeed1 20k Vcc Cs 1F
SE/PHG
Single-ended configuration
Vin1 Cin1 330nF 20k Rin1
Vout1
Cout1
Standby Vout3
Cb 1F
BIAS
Vin2
330nF Cin2
Cout2 20k Rin2 Gnd Vout2
20k Rfeed2
Table 1.
Component Rin1,2 Cin1,2 Rfeed1,2 Cb Cs
Application component information
Functional description Inverting input resistor that sets the closed loop gain in conjunction with Rfeed. This resistor also forms a high pass filter with Cin (fc = 1 / (2 x Pi x Rin x Cin)). Input coupling capacitor that blocks the DC voltage at the amplifier's input terminal. Feedback resistor that sets the closed loop gain in conjunction with Rin. AV= closed loop gain = -Rfeed/Rin. Half supply bypass capacitor. Supply bypass capacitor that provides power supply filtering.
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Absolute maximum ratings and operating conditions
TS4909
2
Absolute maximum ratings and operating conditions
Table 2.
Symbol VCC Vi Tstg Tj Rthja Pdiss ESD ESD Latch-up Supply voltage (1) Input voltage Storage temperature Maximum junction temperature Thermal resistance junction to ambient DFN10 Power dissipation
(2)
Absolute maximum ratings
Parameter Value 6 -0.3V to VCC +0.3V -65 to +150 150 120 1.79 2 200 200 260 170 (3) Unit V V C C C/W W kV V mA C mA
DFN10
Human body model (pin to pin) Machine model 220pF - 240pF (pin to pin) Latch-up immunity (all pins) Lead temperature (soldering, 10 sec) Output current
1. All voltage values are measured with respect to the ground pin. 2. Pd is calculated with Tamb = 25C, Tjunction = 150C. 3. Caution: this device is not protected in the event of abnormal operating conditions, such as for example, short-circuiting between any one output pin and ground, between any one output pin and VCC, and between individual output pins.
Table 3.
Symbol VCC RL Toper CL
Operating conditions
Parameter Supply voltage Load resistor Operating free air temperature range Load capacitor RL = 16 to 100 RL > 100 Standby voltage input TS4909 in STANDBY TS4909 in active state Single-ended or phantom ground configuration voltage Input TS4909 outputs in single-ended configuration TS4909 outputs in phantom ground configuration Thermal resistance junction to ambient DFN10(2) Value 2.2 to 5.5 16 -40 to + 85 400 100 GND VSTBY 0.4 (1) 1.35V VSTBY VCC Unit V C pF
VSTBY
V
VSE/PHG
VSE/PHG=VCC VSE/PHG=0 41
V
Rthja
C/W
1. The minimum current consumption (ISTBY) is guaranteed at ground for the whole temperature range. 2. When mounted on a 4-layer PCB.
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TS4909
Electrical characteristics
3
Table 4.
Symbol ICC ISTBY
Electrical characteristics
Electrical characteristics at VCC = +5V with GND = 0V and Tamb = 25C (unless otherwise specified)
Parameter Supply current Standby current Test conditions No input signal, no load, single-ended No input signal, no load, phantom ground No input signal, RL=32 single-ended single-ended phantom ground phantom ground 60 95 60 95 Min. Typ. Max. Unit 2.1 3.1 10 88 158 85 150 0.3 0.3 0.3 0.3 3.2 4.8 1000 mA nA
Pout
THD+N = 1% max, F = 1kHz, RL = 32, THD+N = 1% max, F = 1kHz, RL = 16, Output power THD+N = 1% max, F = 1kHz, RL = 32, THD+N = 1% max, F = 1kHz, RL = 16, Total harmonic distortion + noise (Av=-1) RL = 32, RL = 16, RL = 32, RL = 16,
mW
THD+N
Pout = 60mW, 20Hz F 20kHz, single-ended Pout = 90mW, 20Hz F 20kHz, single-ended Pout = 60mW, 20Hz F 20kHz, phantom ground Pout = 90mW, 20Hz F 20kHz, phantom ground
%
PSRR
, Inputs grounded(1), Av = -1, RL>=16 Cb=1F, F = 217Hz, Vripple = 200mVpp Power supply rejection ratio Single-ended output referenced to phantom ground Single-ended output referenced to ground Max output current THD +N 1%, RL = 16 connected between out and VCC/2
66 61
72 67 140 0.14 4.75 0.25 4.55 0.47 0.69
dB
Iout
mA
VO
VOL: RL = 32 VOH: RL = 32 Output swing VOL: RL = 16 VOH: RL = 16 Signal-tonoise ratio A-weighted, Av=-1, RL = 32, THD +N < 0.4%, 20Hz F 20kHz Single-ended Phantom ground RL = 32, Av=-1, phantom ground F = 1kHz F = 20Hz to 20kHz RL = 32, Av=-1, single-ended F = 1kHz F = 20Hz to 20kHz Phantom ground configuration, floating inputs, Rfeed=22K Phantom ground configuration Single-ended configuration
4.39 4.17
V
SNR
104 105 -73 -68 -110 -90 5 50 100 20 80 160
dB
Crosstalk
Channel separation
dB
VOO tWU
Output offset voltage Wake-up time
mV ms
1. Guaranteed by design and evaluation.
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Electrical characteristics Table 5.
Symbol ICC ISTBY
TS4909
Electrical characteristics at VCC = +3.0V with GND = 0V, Tamb = 25C (unless otherwise specified) (1)
Parameter Supply current Standby current Test conditions No input signal, no load, single-ended No input signal, no load, phantom ground No input signal, RL=32 single-ended single-ended phantom ground phantom ground 20 30 20 30 Min. Typ. Max. Unit 2 2.8 10 31 52 31 54 0.3 0.3 0.3 0.3 2.8 4.2 1000 mA nA
Pout
THD+N = 1% max, F = 1kHz, RL = 32, THD+N = 1% max, F = 1kHz, RL = 16, Output power THD+N = 1% max, F = 1kHz, RL = 32, THD+N = 1% max, F = 1kHz, RL = 16, RL = 32, RL = 16, RL = 32, RL = 16,
mW
Total harmonic distortion + THD+N noise (Av=-1)
Pout = 25mW, 20Hz F 20kHz, single-ended Pout = 40mW, 20Hz F 20kHz, single-ended Pout = 25mW, 20Hz F 20kHz, phantom ground Pout = 40mW, 20Hz F 20kHz, phantom ground
%
PSRR
, Inputs grounded (2), Av=-1, RL>=16 Cb=1F, F = 217Hz, Power supply Vripple = 200mVpp rejection ratio Single-ended output referenced to phantom ground Single-ended output referenced to ground Max output current THD +N 1%, RL = 16 connected between out and VCC/2 VOL: RL = 32 VOH: RL = 32 VOL: RL = 16 VOH: RL = 16 A-weighted, Av=-1, RL = 32, THD +N < 0.4%, 20Hz F 20kHz Single-ended Phantom ground RL = 32, Av=-1, phantom ground F = 1kHz F = 20Hz to 20kHz RL = 32, Av=-1, single-ended F = 1kHz F = 20Hz to 20kHz Phantom ground configuration, floating inputs, Rfeed=22K Phantom ground configuration Single-ended configuration
64 59
70 65 82 0.12 2.83 0.19 2.70 0.34 0.49
dB
Iout
mA
VO
Output swing
2.6 2.45
V
SNR
Signal-tonoise ratio
100 101
dB
Crosstalk
Channel separation
-73 -68 -110 -90 5 50 100 20 80 160
dB
VOO tWU
Output offset voltage Wake-up time
mV ms
1. All electrical values are guaranteed with correlation measurements at 2.6V and 5V. 2. Guaranteed by design and evaluation.
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TS4909 Table 6.
Symbol ICC ISTBY
Electrical characteristics Electrical characteristics at VCC = +2.6V with GND = 0V, Tamb = 25C (unless otherwise specified)
Parameter Supply current Standby current Test conditions No input signal, no load, single-ended No input signal, no load, phantom ground No input signal, RL=32 single-ended single-ended phantom ground phantom ground 15 22 15 22 Min. Typ. Max. Unit 1.9 2.8 10 23 38 23 39 0.3 0.3 0.3 0.3 2.7 4 1000 mA nA
Pout
THD+N = 1% max, F = 1kHz, RL = 32, THD+N = 1% max, F = 1kHz, RL = 16, Output power THD+N = 1% max, F = 1kHz, RL = 32, THD+N = 1% max, F = 1kHz, RL = 16, Total harmonic distortion + noise (Av=-1) RL = 32, RL = 16, RL = 32, RL = 16,
mW
THD+N
Pout = 20mW, 20Hz F 20kHz, single-ended Pout = 30mW, 20Hz F 20kHz, single-ended Pout = 20mW, 20Hz F 20kHz, phantom ground Pout = 30mW, 20Hz F 20kHz, phantom ground
%
PSRR
, Inputs grounded (1), Av=-1, RL>=16 Cb=1F, F = 217Hz, Power supply Vripple = 200mVpp rejection ratio Single-ended output referenced to phantom ground Single-ended output referenced to ground Max output current THD +N 1%, RL = 16 connected between out and VCC/2
64 59
70 65 70 0.11 0.3 2.45 0.18 0.44 2.32
dB
Iout
mA
VO
VOL: RL = 32 V : R = 32 Output swing OH L VOL: RL = 16 VOH: RL = 16 Signal-tonoise ratio A weighted, Av=-1, RL = 32, THD +N < 0.4%, 20Hz F 20kHz Single-ended Phantom ground RL = 32, Av=-1, phantom ground F = 1kHz F = 20Hz to 20kHz RL = 32, Av=-1, single-ended F = 1kHz F = 20Hz to 20kHz
2.25 2.11
V
SNR
99 100
dB
Crosstalk
Channel separation
-73 -68 -110 -90 5 50 100 20 80 160
dB
VOO tWU
Output offset Phantom ground configuration, floating inputs, Rfeed=22K voltage Wake-up time Phantom ground configuration Single-ended configuration
mV ms
1. Guaranteed by design and evaluation.
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Electrical characteristics Table 7. Index of graphics
Description Open-loop frequency response Output swing vs. power supply voltage THD+N vs. output power THD+N vs. frequency Output power vs. power supply voltage Output power vs. load resistance Power dissipation vs. output power Crosstalk vs. frequency Signal to noise ratio vs. power supply voltage Power supply rejection ratio vs. frequency Current consumption vs. power supply voltage Current consumption vs. standby voltage Power derating curves Figure Figure 2 to 6 Figure 7 Figure 8 to 23 Figure 24 to 31 Figure 32 to 35 Figure 36 to 41 Figure 42 to 47 Figure 48 to 53 Figure 54 to 61 Figure 62 to 67 Figure 68 and 69 Figure 70 to 75 Figure 76
TS4909
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TS4909
Electrical characteristics
Figure 2.
150
Open-loop frequency response
90 gain 45 phase 0
Phase ()
Figure 3.
100 75
Open-loop frequency response
90 45 gain 0
Phase ()
125 100
Gain (dB)
50
Gain (dB)
75 50 25 0 -25 -50 -1 10 RL=1M , T AMB=25C 10 10
3
-45 -90 -135 -180 -225
5 7
25 0 -25 -50 -75 -100 -1 10 RL=100 , CL=400pF, T AMB =25C 10 10
3
-45 -90 phase -135 -180 -225
5 7
-270
-270
10
10
10
10
Frequency (Hz)
Frequency (Hz)
Figure 4.
150
Open-loop frequency response
90 gain 45 phase 0
Phase ()
Figure 5.
100 75
Open-loop frequency response
90 45 gain 0
Phase ()
125 100
Gain (dB)
50
Gain (dB)
75 50 25 0 -25 -50 -1 10 RL=1M , CL=100pF, T AMB=25C 10 10
3
-45 -90 -135 -180 -225
5 7
25 0 phase -25 -50 -75 -100 -1 10 RL=16 , T AMB =25C 10 10
3
-45 -90 -135 -180 -225
5 7
-270
-270
10
10
10
10
Frequency (Hz)
Frequency (Hz)
Figure 6.
Open-loop frequency response
Figure 7.
Output swing vs. power supply voltage
6
100 75 gain 50
Gain (dB)
90 45 0
Phase ()
T AMB =25C 5 4 3 RL=32 2 1 0 RL=16
25 0 phase -25 -50 -75 -100 -1 10 RL=16 , CL=400pF, TAMB=25C 10 10
3
-45 -90 -135 -180 -225
5 7
-270
10
10
VOH & VOL (V)
Frequency (Hz)
2
3
4
Power Supply Voltage (V)
5
6
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Electrical characteristics
TS4909
Figure 8.
10
THD+N vs. output power
Figure 9.
10
THD+N vs. output power
1
THD+N (%)
Phantom Ground F=1kHz, RL=16 Av=-1, Tamb=25C BW=20Hz-120kHz
Vcc=5V
THD+N (%)
Phantom Ground F=20kHz, RL=16 Av=-1, Tamb=25C BW=20Hz-120kHz 1
Vcc=5V Vcc=3V
Vcc=3V 0.1 Vcc=2.6V 0.01
Vcc=2.6V 0.1
1E-3 1E-3
0.01
Output Power (mW)
0.1
0.2
0.01 1E-3
0.01
Output Power (mW)
0.1
0.2
Figure 10. THD+N vs. output power
10 Phantom Ground F=1kHz, RL=32 Av=-1, Tamb=25C BW=20Hz-120kHz
Figure 11. THD+N vs. output power
10 Phantom Ground F=20kHz, RL=32 Av=-1, Tamb=25C BW=20Hz-120kHz
THD+N (%)
1
THD+N (%)
1 Vcc=5V Vcc=3V Vcc=2.6V 0.1
Vcc=5V 0.1 Vcc=3V Vcc=2.6V 0.01
1E-3 1E-3
0.01
Output Power (mW)
0.1
0.2
0.01 1E-3
0.01
Output Power (mW)
0.1
0.2
Figure 12. THD+N vs. output power
10 Single Ended F=1kHz, RL=16 Av=-1, Tamb=25C BW=20Hz-120kHz
Figure 13. THD+N vs. output power
10 Single Ended F=20kHz, RL=16 Av=-1, Tamb=25C BW=20Hz-120kHz
THD+N (%)
1
THD+N (%)
Vcc=5V 1 Vcc=3V
Vcc=5V Vcc=3V
0.1 Vcc=2.6V 0.01
Vcc=2.6V 0.1
1E-3 1E-3
0.01
Output Power (mW)
0.1
0.2
0.01 1E-3
0.01
Output Power (mW)
0.1
0.2
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TS4909
Electrical characteristics
Figure 14. THD+N vs. output power
10 Single Ended F=1kHz, RL=32 Av=-1, Tamb=25C BW=20Hz-120kHz
Figure 15. THD+N vs. output power
10 Single Ended F=20kHz, RL=32 Av=-1, Tamb=25C BW=20Hz-120kHz
THD+N (%)
1
THD+N (%)
1 Vcc=5V Vcc=3V 0.1 Vcc=2.6V
Vcc=5V 0.1 Vcc=3V Vcc=2.6V 0.01
1E-3 1E-3
0.01
Output Power (mW)
0.1
0.2
0.01 1E-3
0.01
Output Power (mW)
0.1
0.2
Figure 16. THD+N vs. output power
10 Phantom Ground F=1kHz, RL=16 Av=-4, Tamb=25C BW=20Hz-120kHz
Figure 17. THD+N vs. output power
10 Phantom Ground F=20kHz, RL=16 Av=-4, Tamb=25C BW=20Hz-120kHz
THD+N (%)
Vcc=5V Vcc=3V
1
THD+N (%)
Vcc=5V 1
Vcc=3V 0.1 Vcc=2.6V
Vcc=2.6V
0.1 0.01
1E-3 1E-3
0.01
Output Power (mW)
0.1
0.2
0.01 1E-3
0.01
Output Power (mW)
0.1
0.2
Figure 18. THD+N vs. output power
10 Phantom Ground F=1kHz, RL=32 Av=-4, Tamb=25C BW=20Hz-120kHz Vcc=3V 0.1 Vcc=2.6V Vcc=5V
Figure 19. THD+N vs. output power
10 Phantom Ground F=20kHz, RL=32 Av=-4, Tamb=25C BW=20Hz-120kHz
THD+N (%)
Vcc=5V
1
THD+N (%)
1 Vcc=3V Vcc=2.6V 0.1
0.01
1E-3 1E-3
0.01
Output Power (mW)
0.1
0.2
0.01 1E-3
0.01
Output Power (mW)
0.1
0.2
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Electrical characteristics
TS4909
Figure 20. THD+N vs. output power
10 Single Ended F=1kHz, RL=16 Av=-4, Tamb=25C BW=20Hz-120kHz
Figure 21. THD+N vs. output power
10 Single Ended F=20kHz, RL=16 Av=-4, Tamb=25C BW=20Hz-120kHz
THD+N (%)
Vcc=5V
1
THD+N (%)
Vcc=5V 1 Vcc=3V
Vcc=3V Vcc=2.6V
0.1 Vcc=2.6V
0.1 0.01
1E-3 1E-3
0.01
Output Power (mW)
0.1
0.2
0.01 1E-3
0.01
Output Power (mW)
0.1
0.2
Figure 22. THD+N vs. output power
10 Single Ended F=1kHz, RL=32 Av=-4, Tamb=25C BW=20Hz-120kHz Vcc=3V 0.1 Vcc=2.6V Vcc=5V
Figure 23. THD+N vs. output power
10 Single Ended F=20kHz, RL=32 Av=-4, Tamb=25C BW=20Hz-120kHz
THD+N (%)
Vcc=5V
1
THD+N (%)
1 Vcc=3V Vcc=2.6V 0.1
0.01
1E-3 1E-3
0.01
Output Power (mW)
0.1
0.2
0.01 1E-3
0.01
Output Power (mW)
0.1
0.2
Figure 24. THD+N vs. frequency
1 Phantom Ground RL=16 , Av=-1 BW=20Hz-120kHz TAMB =25C
THD+N (%)
Figure 25. THD+N vs. frequency
1 Phantom Ground RL=32 , Av=-1 BW=20Hz-120kHz T AMB =25C
THD+N (%)
0.1
Vcc=3V Po=40mW
0.1
Vcc=5V Po=60mW Vcc=3V Po=25mW
Vcc=2.6V Po=30mW 0.01
Vcc=5V Po=90mW
0.01
Vcc=2.6V Po=20mW
0.002 20 100 1k
Frequency (Hz)
0.002 10k 20k 20 100 1k
Frequency (Hz)
10k
20k
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TS4909
Electrical characteristics
Figure 26. THD+N vs. frequency
1 Single Ended RL=16 ,Av=-1 BW=20Hz-120kHz TAMB =25C
THD+N (%)
Figure 27. THD+N vs. frequency
1 Single Ended RL=32 , Av=-1 BW=20Hz-120kHz T AMB =25C
THD+N (%)
Vcc=5V Po=90mW 0.1
Vcc=5V Po=60mW
0.1 Vcc=3V Po=40mW 0.01 Vcc=2.6V Po=30mW
0.01
Vcc=2.6V Po=20mW
Vcc=3V Po=25mW
0.002 20 100 1k
Frequency (Hz)
0.002 10k 20k 20 100 1k
Frequency (Hz)
10k
20k
Figure 28. THD+N vs. frequency
1 Phantom Ground RL=16 , Av=-4 BW=20Hz-120kHz TAMB =25C
THD+N (%)
Figure 29. THD+N vs. frequency
1 Phantom Ground RL=32 , Av=-4 BW=20Hz-120kHz T AMB =25C
THD+N (%)
Vcc=5V Po=90mW Vcc=3V Po=40mW
Vcc=5V Po=60mW Vcc=3V Po=25mW
0.1 Vcc=2.6V Po=20mW
0.1 Vcc=2.6V Po=30mW
0.01 0.01 0.005 20 100 1k
Frequency (Hz)
0.002 10k 20k 20 100 1k
Frequency (Hz)
10k
20k
Figure 30. THD+N vs. frequency
1 Single Ended RL=16 , Av=-4 BW=20Hz-120kHz TAMB =25C
THD+N (%)
Figure 31. THD+N vs. frequency
1 Vcc=5V Po=90mW Single Ended RL=32 , Av=-4 BW=20Hz-120kHz T AMB =25C
THD+N (%)
Vcc=5V Po=60mW
0.1 Vcc=2.6V Po=20mW
0.1 Vcc=2.6V Po=30mW
Vcc=3V Po=40mW
Vcc=3V Po=25mW
0.01 0.01 0.005 20 100 1k
Frequency (Hz)
0.002 10k 20k 20 100 1k
Frequency (Hz)
10k
20k
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Electrical characteristics
TS4909
Figure 32. Output power vs. power supply voltage
240 200
Output Power (mW)
Figure 33. Output power vs. power supply voltage
140 Phantom Ground RL=32 , F=1kHz Av=-1, T AMB =25C BW=20Hz-120kHz
Phantom Ground RL=16 , F=1kHz Av=-1, T AMB =25C
Output Power (mW)
120 100 80 60 40 20 0
160 120
BW=20Hz-120kHz
THD+N=10% 80 40 0 THD+N=1%
THD+N=10%
THD+N=1%
2
3
4
Power Supply Voltage (V)
5
6
2
3
4
Power Supply Voltage (V)
5
6
Figure 34. Output power vs. power supply voltage
240 200
Output Power (mW)
Figure 35. Output power vs. power supply voltage
140 Single Ended RL=32 , F=1kHz Av=-1, T AMB =25C BW=20Hz-120kHz
Single Ended RL=16 , F=1kHz Av=-1, T AMB=25C BW=20Hz-120kHz
Output Power (mW)
120 100 80 60 40 20 0
160 120 THD+N=10% 80 40 0 THD+N=1%
THD+N=10%
THD+N=1%
2
3
4
Power Supply Voltage (V)
5
6
2
3
4
Power Supply Voltage (V)
5
6
Figure 36. Output power vs. load resistance
50 Phantom Ground Vcc=2.6V, F=1kHz Av=-1, T AMB =25C BW=20Hz-120kHz 30 THD+N=1% 20
Figure 37. Output power vs. load resistance
50 Single Ended Vcc=2.6V, F=1kHz Av=-1, T AMB=25C BW=20Hz-120kHz 30 THD+N=1% 20
40
Output Power (mW)
THD+N=10%
40
Output Power (mW)
THD+N=10%
10
10
0 16
32
48
64
80
96
0 16
32
48
64
80
96
Load Resistance ( )
Load Resistance ()
14/32
TS4909
Electrical characteristics
Figure 38. Output power vs. load resistance
80 Phantom Ground Vcc=3V, F=1kHz Av=-1, T AMB=25C THD+N=10% BW=20Hz-120kHz
Figure 39. Output power vs. load resistance
80 Single Ended Vcc=3V, F=1kHz Av=-1, T AMB=25C BW=20Hz-120kHz
Output Power (mW)
40
Output Power (mW)
60
60
THD+N=10%
THD+N=1%
40
THD+N=1%
20
20
0 16
32
48
64
80
96
0 16
32
48
64
80
96
Load Resistance ( )
Load Resistance ( )
Figure 40. Output power vs. load resistance
200 Phantom Ground Vcc=5V, F=1kHz Av=-1, T AMB=25C BW=20Hz-120kHz THD+N=1%
Figure 41. Output power vs. load resistance
200 Single Ended Vcc=5V, F=1kHz Av=-1, T AMB=25C BW=20Hz-120kHz
THD+N=10%
Output Power (mW)
Output Power (mW)
150
150
THD+N=10%
100
100
THD+N=1%
50
50
0 16
32
48
64
80
96
0 16
32
48
64
80
96
Load Resistance ( )
Load Resistance ( )
Figure 42. Power dissipation vs. output power Figure 43. Power dissipation vs. output power
80 70
Power Dissipation (mW)
30 Phantom Ground Vcc=2.6V, F=1kHz THD+N<1% 25 20 15 10 5 0 Single Ended Vcc=2.6V, F=1kHz THD+N<1% RL=16
60 50 40 30 20 10 0 0 5 10 15 20 25 30 Output Power (mW) 35 40 RL=32 RL=16
Power Dissipation (mW)
RL=32
0
5
10
15 20 25 30 Output Power (mW)
35
40
15/32
Electrical characteristics
TS4909
Figure 44. Power dissipation vs. output power Figure 45. Power dissipation vs. output power
120 100 80 RL=16 60 40 20 0 RL=32 5 0 10 20 30 40 Output Power (mW) 50 60 0 0 5 10 15 20 25 30 35 40 Output Power (mW) 45 50 55 Phantom Ground Vcc=3V, F=1kHz THD+N<1% 40 35
Power Dissipation (mW)
Power Dissipation (mW)
Single Ended Vcc=3V, F=1kHz THD+N<1%
RL=16
30 25 20 15 10 RL=32
Figure 46. Power dissipation vs. output power Figure 47. Power dissipation vs. output power
300 250 200 150 100 50 0 RL=32 Phantom Ground Vcc=5V, F=1kHz THD+N<1% RL=16 100 Single Ended Vcc=5V, F=1kHz, THD+N<1%
Power Dissipation (mW)
RL=16
Power Dissipation (mW)
80
60 RL=32 40
20
0
20
40
60 80 100 120 Output Power (mW)
140
160
0
0
20
40
60 80 100 120 Output Power (mW)
140
160
Figure 48. Crosstalk vs. frequency
0 -20
Crosstalk (dB)
Figure 49. Crosstalk vs. frequency
0 Single Ended Vcc=5V, RL=32 Av=-1, Po=60mW TAMB =25C
Crosstalk (dB)
-40 -60
Single Ended Vcc=5V, RL=16 Av=-1, Po=90mW T AMB =25C
-20 -40 -60 -80 -100 -120 20
OUT1 to OUT2 -80 -100 -120 20 OUT2 to OUT1
OUT2 to OUT1
OUT1 to OUT2
100
1k
Frequency (Hz)
10k
20k
100
1k
Frequency (Hz)
10k
20k
16/32
TS4909
Electrical characteristics
Figure 50. Crosstalk vs. frequency
0 -20
Crosstalk (dB)
Figure 51. Crosstalk vs. frequency
0 Single Ended Vcc=5V, RL=32 Av=-4, Po=60mW TAMB =25C
-40 -60
Crosstalk (dB)
Single Ended Vcc=5V, RL=16 Av=-4, Po=90mW T AMB =25C
-20 -40 -60 -80 -100 -120 20
OUT1 to OUT2 -80 -100 -120 20 OUT2 to OUT1
OUT2 to OUT1 OUT1 to OUT2
100
1k
Frequency (Hz)
10k
20k
100
1k
Frequency (Hz)
10k
20k
Figure 52. Crosstalk vs. frequency
0 -20
Crosstalk (dB)
Figure 53. Crosstalk vs. frequency
0
Phantom ground Vcc=5V, Av=-1, T AMB=25C RL=16 , Po=90mW
Crosstalk (dB)
-20 -40 -60 -80 -100 -120 20
Phantom ground Vcc=5V, Av=-4, T AMB=25C RL=16 , Po=90mW
-40 -60 -80 -100 -120 20
RL=32 , Po=60mW
RL=32 , Po=60mW
100
1k
Frequency (Hz)
10k
20k
100
1k
Frequency (Hz)
10k
20k
Figure 54. Signal to noise ratio vs. power supply voltage
104 Unweighted Filter (20Hz-20kHz)
Signal to Noise Ratio (dB)
Figure 55. Signal to noise ratio vs. power supply voltage
106 Unweighted Filter (20Hz-20kHz)
Signal to Noise Ratio (dB)
102 100 98 96 94 92
Phantom Ground Av=-1, T AMB =25C Cb=1F THD+N<0.4% RL=16 RL=32
104 102 100 98 96 94
Single Ended Av=-1, T AMB =25C Cb=1F THD+N<0.4%
RL=16 RL=32
2
3
4
Power Supply Voltage (V)
5
6
2
3
4
Power Supply Voltage (V)
5
6
17/32
Electrical characteristics
TS4909
Figure 56. Signal to noise ratio vs. power supply voltage
108 106 104 102 100 98 96 RL=32 RL=16 Phantom Ground A-weighted Filter Av=-1, T AMB =25C Cb=1F THD+N<0.4%
Figure 57. Signal to noise ratio vs. power supply voltage
108 106 104 102 100 98 96 RL=32 RL=16 Single Ended A-weighted Filter Av=-1, T AMB =25C Cb=1F THD+N<0.4%
2
3
4
Power Supply Voltage (V)
5
6
Signal to Noise Ratio (dB)
Signal to Noise Ratio (dB)
2
3
4
Power Supply Voltage (V)
5
6
Figure 58. Signal to noise ratio vs. power supply voltage
98 Unweighted Filter (20Hz-20kHz)
Signal to Noise Ratio (dB)
Figure 59. Signal to noise ratio vs. power supply voltage
96 Unweighted Filter (20Hz-20kHz)
Signal to Noise Ratio (dB)
96 94 92 90 88 86 84
Phantom Ground Av=-4, T AMB =25C Cb=1F THD+N<0.4%
94
Phantom Ground Av=-4, T AMB =25C Cb=1F THD+N<0.4% RL=16
92
RL=16 RL=32
90 RL=32 88
2
3
4
Power Supply Voltage (V)
5
6
86
2
3
4
Power Supply Voltage (V)
5
6
Figure 60. Signal to noise ratio vs. power supply voltage
100 98 96 94 92 90 88 RL=32 RL=16 Phantom Ground A-weighted Filter Av=-4, T AMB =25C Cb=1F THD+N<0.4%
Figure 61. Signal to noise ratio vs. power supply voltage
100 98 96 94 RL=16 92 RL=32 90 88 Phantom Ground A-weighted Filter Av=-4, T AMB =25C Cb=1F THD+N<0.4%
Signal to Noise Ratio (dB)
2
3
4
Power Supply Voltage (V)
5
6
Signal to Noise Ratio (dB)
2
3
4
Power Supply Voltage (V)
5
6
18/32
TS4909
Electrical characteristics
Figure 62. Power supply rejection ratio vs. frequency
0 -10 -20 Phantom Ground, Inputs grounded Av=-1, RL16 , Cb=1F, T AMB =25C
Figure 63. Power supply rejection ratio vs. frequency
0 -10 -20
PSRR (dB)
Single Ended, Inputs grounded Av=-1, RL16 , Cb=1F, T AMB=25C
PSRR (dB)
-30 -40 -50 -60 -70 -80 20 100 1k
Frequency (Hz)
-30 -40 -50 -60 -70 Vcc=2.6V Vcc=3V Vcc=5V
Vcc=2.6V Vcc=3V Vcc=5V
10k
20k
-80 20
100
1k
Frequency (Hz)
10k
20k
Figure 64. Power supply rejection ratio vs. frequency
0 -10 -20 Av=-4
PSRR (dB)
Figure 65. Power supply rejection ratio vs. frequency
0
Phantom Ground, Inputs grounded Vcc=3V, RL16 , Cb=1F, T AMB =25C
-10 -20
Single Ended, Inputs grounded Vcc=3V, RL16 , Cb=1F, T AMB =25C Av=-4
Av=-2 -40 -50 -60 -70 -80 20 100 1k
Frequency (Hz)
PSRR (dB)
-30 Av=-1
-30 Av=-2 -40 -50 -60 -70 Av=-1
10k
20k
-80 20
100
1k
Frequency (Hz)
10k
20k
Figure 66. Power supply rejection ratio vs. frequency
0 -10 -20
PSRR (dB)
Figure 67. Power supply rejection ratio vs. frequency
0
Phantom Ground, Inputs grounded Av=-1, RL16 , Vcc=3V, T AMB =25C
-10 -20
Single Ended, Inputs grounded Av=-1, RL16 , Vcc=3V, T AMB =25C Cb=1F
Cb=1F Cb=470nF Cb=220nF
PSRR (dB)
-30 -40 -50 -60 -70 -80 20
-30 -40 -50 -60 -70
Cb=470nF Cb=220nF Cb=100nF
Cb=100nF
100
1k
Frequency (Hz)
10k
20k
-80 20
100
1k
Frequency (Hz)
10k
20k
19/32
Electrical characteristics
TS4909
Figure 68. Current consumption vs. power supply voltage
4.0 3.5
Current Consumption (mA)
Figure 69. Current consumption vs. power supply voltage
3.0 2.5 2.0 1.5 1.0 0.5 T AMB=-40C 6 0.0 2 3 4
Power Supply Voltage (V)
3.0 2.5 2.0 1.5 1.0 0.5 0.0 2 TAMB =-40C T AMB=25C Phantom ground No Loads 4
Power Supply Voltage (V)
T AMB =85C
Current Consumption (mA)
T AMB=85C T AMB =25C Single ended No Loads 5 6
3
5
Figure 70. Current consumption vs. standby voltage
4 T AMB =85C 3 T AMB =25C 2 T AMB =-40C
Figure 71. Current consumption vs. standby voltage
2.5 T AMB =85C
Current Consumption (mA)
Current Consumption (mA)
2.0 TAMB =25C 1.5 T AMB =-40C
1.0
1 Phantom ground V CC =2.6V 0 0.0 0.5 1.0 1.5 2.0 2.5
0.5 Single ended V CC =2.6V 0.5 1.0 1.5 2.0 2.5
0.0 0.0
Standby Voltage (V)
Standby Voltage (V)
Figure 72. Current consumption vs. standby voltage
4 T AMB=85C 3 T AMB =25C 2 TAMB =-40C
Figure 73. Current consumption vs. standby voltage
2.5 T AMB=85C
Current Consumption (mA)
Current Consumption (mA)
2.0
T AMB =25C TAMB =-40C
1.5
1.0
1 Phantom ground V CC =3V 0 0.0 0.5 1.0 1.5 2.0 2.5 3.0
0.5 Single ended V CC =3V 0.5 1.0 1.5 2.0 2.5 3.0
0.0 0.0
Standby Voltage (V)
Standby Voltage (V)
20/32
TS4909
Electrical characteristics
Figure 74. Current consumption vs. standby voltage
8 T AMB =85C
Current Consumption (mA)
Figure 75. Current consumption vs. standby voltage
8
Current Consumption (mA)
6
T AMB =25C T AMB =-40C
6
T AMB =85C T AMB=25C
4
4
TAMB =-40C
2 Phantom ground V CC=5V 0 0.0 0.5 1.0 1.5 2.0 4 5
2 Single ended V CC =5V 0.5 1.0 1.5 2.0 4 5
0 0.0
Standby Voltage (V)
Standby Voltage (V)
Figure 76. Power derating curves
DFN10 Package Power Dissipation (W)
3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 No Heat sink Mounted on a 4-layer PCB
0
25
50
75
100
125
150
Ambiant Temperature (C)
21/32
Application information
TS4909
4
4.1
Application information
General description
The TS4909 integrates two monolithic power amplifiers. The amplifier output can be configured to provide either single-ended (SE) capacitively-coupled output or phantom ground (PHG) capacitor-less output. Figure 1: Typical applications for the TS4909 on page 3 shows schematics for each of these configurations.
Single-ended configuration
In the single-ended configuration, an output coupling capacitor, Cout, on the output of the power amplifier (Vout1 and Vout2) is mandatory. The output of the power amplifier is biased to a DC voltage equal to VCC/2 and the output coupling capacitor blocks this reference voltage.
Phantom ground configuration
In the phantom ground configuration, an internal buffer (Vout3) maintains the VCC/2 voltage and the output of the power amplifiers are also biased to the VCC/2 voltage. Therefore, no output coupling capacitors are needed. This is of primary importance in portable applications where space constraints are continually present.
4.2
Frequency response
Higher cut-off frequency
In the high frequency region, you can limit the bandwidth by adding a capacitor Cfeed in parallel with Rfeed. It forms a low-pass filter with a -3dB cut-off frequency FCH. Assuming that FCH is the highest frequency to be amplified (with a 3dB attenuation), the maximum value of Cfeed is:
1 F CH = -------------------------------------------------2 R feed C feed
Figure 77. Higher cut-off frequency vs. feedback capacitor
100k
Higher Cut-off Frequency (kHz)
Rfeed=10k Rfeed=20k
10k
Rfeed=40k 1k Rfeed=80k
100 0.01
0.1
1 Cfeed (F)
10
100
22/32
TS4909
Application information
Lower cut-off frequency
The lower cut-off frequency FCL of the TS4909 depends on input capacitors Cin1,2. In the single-ended configuration, FCL depends on output capacitors Cout1,2 as well. The input capacitor Cin in series with the input resistor Rin of the amplifier is equivalent to a first-order high-pass filter. Assuming that FCL is the lowest frequency to be amplified (with a 3dB attenuation), the minimum value of Cin is:
1 C in = --------------------------------------2 F CL R in
In the single-ended configuration, the capacitor Cout in series with the load resistor RL is equivalent to a first-order high-pass filter. Assuming that FCL is the lowest frequency to be amplified (with a 3dB attenuation), the minimum value of Cout is:
1 C out = -------------------------------------2 F CL R L
Figure 78. Lower cut-off frequency vs. input capacitor
10k
Figure 79. Lower cut-off frequency vs. output capacitor
10k
Lower Cut-off frequency (Hz)
Rin=10k
Lower Cut-off frequency (Hz)
R L=16 R L=32 1k R L=300 R L=600 100
Rin=20k 1k Rin=50k Rin=100k
100
10
1
10
Cin (nF)
100
1000
10 0.1
1
10 Cout (F)
100
1000
Note:
If FCL is kept the same for calculation purposes, it must be taken in account that the 1storder high-pass filter on the input and the 1st-order high-pass filter on the output create a 2nd-order high-pass filter in the audio signal path with an attenuation 6dB on FCL and a rolloff of 40db decade.
4.3
Gain using the typical application schematics
In the flat region (no Cin effect), the output voltage of a channel is:
R feed V OUT = V IN - ------------- = V IN A V R
in
The gain AV is:
R feed A V = - ------------R in
Note:
The configuration (either single-ended or phantom ground) has no effect on the value of the gain.
23/32
Application information
TS4909
4.4
Power dissipation and efficiency
Hypotheses:

Voltage and current (Vout and Iout) in the load are sinusoidal. Supply voltage (VCC) is a pure DC source.
V OUT = V PEAK sin t ( V )
Regarding the load we have:
and
V OUT I OUT = -------------- ( A ) RL
and
V PEAK P OUT = ----------------- ( A ) 2R L
2
4.4.1
Single-ended configuration
The average current delivered by the power supply voltage is:
Icc AVG V PEAK V PEAK 1 = ------ ---------------- sin ( t ) dt = ----------------- ( A ) RL R L 2
0
Figure 80. Current delivered by power supply voltage in single-ended configuration
Icc (t) Vpeak/RL
IccAVG 0 T/2 T 3T/2 2T Time
The power delivered by the power supply voltage is:
P supply = V CC I CC
AVG
(W)
Therefore, the power dissipation by each power amplifier is
P diss = P supply - P OUT ( W ) 2V CC P diss = ------------------ P OUT - P OUT ( W ) RL
and the maximum value is obtained when:
P diss =0 P OUT
24/32
TS4909 and its value is:
P diss
MAX
Application information
V CC = ------------ ( W ) 2 RL
2
Note:
This maximum value depends only on the power supply voltage and load values. The efficiency is the ratio between the output power and the power supply:
P OUT V PEAK = ------------------ = -------------------P supply 2V CC
The maximum theoretical value is reached when VPEAK = VCC/2, so:
= -- = 78.5% 4
4.4.2
Phantom ground configuration
The average current delivered by the power supply voltage is:
Icc AVG 2V PEAK 1 V PEAK = -- ---------------- sin ( t ) dt = -------------------- ( A ) RL R L
0
Figure 81. Current delivered by power supply voltage in phantom ground configuration
Icc (t) Vpeak/RL IccAVG
0
T/2
T
3T/2
2T Time
The power delivered by the power supply voltage is:
P supply = V CC I CC
AVG
(W)
Therefore, the power dissipation by each amplifier is
2 2V CC P diss = ---------------------- P OUT - P OUT ( W ) RL
and the maximum value is obtained when:
P diss =0 P OUT
and its value is:
P diss
MAX
2V CC = -------------- ( W ) 2 RL
2
Note:
This maximum value depends only on power supply voltage and load values.
25/32
Application information The efficiency is the ratio between the output power and the power supply:
P OUT V PEAK = ------------------ = -------------------P supply 4V CC
TS4909
The maximum theoretical value is reached when VPEAK = VCC/2, so:
= -- = 39.25% 8
4.4.3
Total power dissipation
The TS4909 is a stereo (dual channel) amplifier. It has two independent power amplifiers. Each amplifier produces heat due to its power dissipation. Therefore the maximum die temperature is the sum of each amplifier's maximum power dissipation. It is calculated as follows:

Pdiss 1 = power dissipation due to the first channel power amplifier (Vout1). Pdiss 2 = power dissipation due to the second channel power amplifier (Vout2). Total Pdiss = Pdiss 1 + Pdiss 2 (W)
In most cases, Pdiss 1 = Pdiss 2, giving:
TotalPdiss = 2Pdiss1 = 2P diss2
Single-ended configuration:
2 2V CC TotalP diss = ---------------------- P OUT - 2P OUT RL
Phantom ground configuration:
4 2V CC TotalP diss = ---------------------- P OUT - 2P OUT RL
4.5
Decoupling of the circuit
Two capacitors are needed to properly bypass the TS4909 -- a power supply capacitor Cs and a bias voltage bypass capacitor Cb. Cs has a strong influence on the THD+N at high frequencies (above 7kHz) and indirectly on the power supply disturbances. With 1 F, you could expect the THD+N performance to be similar to the values shown in this datasheet. If Cs is lower than 1 F, THD+N increases at high frequencies and disturbances on the power supply rail are less filtered. On the contrary, if Cs is higher than 1 F, those disturbances on the power supply rail are more filtered. Cb has an influence on THD+N at lower frequencies, but its value is critical on the final result of PSRR with inputs grounded in lower frequencies:

If Cb is lower than 1 F, THD+N increases at lower frequencies and the PSRR worsens (increases). If Cb is higher than 1 F, the benefit on THD+N and PSRR in the lower frequency range is small.
26/32
TS4909
Application information
4.6
Wake-up time
When the standby is released to turn the device ON, the bypass capacitor Cb is charged immediately. As Cb is directly linked to the bias of the amplifier, the bias will not work properly until the Cb voltage is correct. The time to reach this voltage plus a time delay of 40ms (pop precaution) is called the wake-up time or tWU. It is specified in the electrical characteristics tables with Cb=1F (see Section 3: Electrical characteristics on page 5). If Cb has a value other than 1F, you can calculate tWU by using the following formulas, or read it directly from the graph in Figure 82.
Single-ended configuration
Cb 2.5 t WU = ---------------------- + 40 0.042 [ms;F ]
Phantom ground configuration
Cb 2.5 t WU = ---------------------- + 40 0.417 [ms;F ]
Figure 82. Typical wake-up time vs. bypass capacitance
350 T AMB=25C 300 Single Ended
Wake-up Time (ms)
250 200 150 100 50 0 Phantom Ground
0
1
2
Cb (F)
3
4
5
Note:
It is assumed the Cb voltage is equal to 0 V. If the Cb voltage is not equal 0 V, the wake-up time is lower.
4.7
Pop performance
Pop performance in the phantom ground configuration is closely linked with the size of the input capacitor Cin. The size of Cin is dependent on the lower cut-off frequency and PSRR values requested. In order to reach low pop, Cin must be charged to VCC/2 in less than 40ms. To follow this rule, the equivalent input constant time (RinCin) should be less then 8ms: in = Rin x Cin < 0.008 s By following the previous rules, the TS4909 can reach low pop even with a high gain such as 20dB.
27/32
Application information
TS4909
Example calculation:
With Rin = 20k and FCL = 20Hz, -3db low cut-off frequency, Cin = 398nF. So, Cin = 390nF with standard value which gives a lower cut-off frequency equal to 20.4Hz. In this case, in = Rin x Cin = 7.8ms This value is sufficient with regards to the previous formula, so we can state that the pop will be imperceptible.
Connecting the headphones
Generally headphones are connected using a jack connector. To prevent pop in the headphones while plugging in the jack, a pulldown resistor should be connected in parallel with each headphone output. This allows the capacitors Cout to be charged even when no headphones are plugged in. A resistor of 1 k is high enough to be a negligible load, and low enough to charge the capacitors Cout in less than one second.
4.8
Standby mode
When the TS4909 is in standby mode, the time required to put the output stages (Vout1, Vout2 and Vout3) into a high impedance state with reference to ground, and the internal circuitry in standby mode, is a few microseconds. Figure 83. Internal equivalent circuit schematics of the TS4909 in standby mode
Vin1 25K BYPASS 25K Vin2 1M GND Vout2 1M Vout3 Vout1
28/32
TS4909
Package information
5
Package information
In order to meet environmental requirements, STMicroelectronics offers these devices in ECOPACK(R) packages. These packages have a lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an STMicroelectronics trademark. ECOPACK specifications are available at: www.st.com. Figure 84. TS4909 footprint recommendation
29/32
Package information Figure 85. DFN10 3x3 exposed pad package mechanical data
Dimensions Ref. Min. A A1 A2 A3 b D D2 E E2 e L 0.3 1.49 2.21 0.18 0.80 Millimeters Typ. 0.90 0.02 0.70 0.20 0.23 3.00 2.26 3.00 1.64 0.50 0.4 0.5 11.8 1.74 58.7 2.31 87.0 0.30 7.1 Max. 1.00 0.05 Min. 31.5 Mils Typ. 35.4 0.8 25.6 7.9 9.1 118.1 89.0 118.1 64.6 19.7 15.7
TS4909
Max. 39.4 2.0
11.8
91.0
68.5
19.7
30/32
TS4909
Ordering information
6
Ordering information
Table 8. Order code
Temperature range -40C to +85C Package DFN10 Packing Tape & reel Marking K909
Part number TS4909IQT
7
Revision history
Table 9.
Date 1-Dec-2006 2-Jan-2007 26-Sep-2007
Document revision history
Revision 6 7 8 Changes Release to production of the device. Correction of revision number of December revision (revision 6 instead of revision 5). Updated Table 2: Absolute maximum ratings.
31/32
TS4909
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