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TA2157F/FN
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA2157F,TA2157FN
Digital Servo Head Amp for CD System
TA2157F/FN is a digital servo head amp for a 3-beam pickup used in CD systems. Gain for RF signal generation amp can be freely set, supporting CD-RW. Combining with single-chip processor TC94A14F/FA/FB, a CMOS digital servo, makes configuring CD systems simple.
TA2157F
Features
* * * * * * * * * * Low power dissipation digital servo head amp Built-in amplifier for generating reference voltage (VRO) Built-in auto laser power control (APC) amplifier Built-in RF amplifier Built-in RF signal automatic gain control (AGC) amplifier Built-in gain change circuit for CD-RW Built-in focus error and tracking error signal amplifiers Built-in track count signal amplifier Normal-, double-, and x4-speed operation 24-pin mini flat package Weight SSOP24-P-300-1.00: 0.3 g (typ.) SSOP24-P-300-0.65A: 0.17 g (typ.)
TA2157FN
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TA2157F/FN
Block Diagram
GVSW 13
PEAK 20 kW 20 kW 50 kW 15 kW
12 RFDC
VRO 14 40 kW 20 kW FEO 15 40 kW 10 pF 15 kW 20 kW
40 mA 10 pF
11 TEO
20 kW
10 TEN
FEN 16 20 kW RFRP 17
50 mA 12 kW 12 kW 1.3 V 2 kW 50 kW
9 TEBC
8 SEL
40 kW
RFRPIN 18
20 kW BOTTOM PEAK
1 kW 14 kW 2 kW
7 LDO
RFGO 19 240 kW 15 pF RFGC 20 240 kW 15 pF AGCIN 21 AGC Amp. 180 kW 40 pF
1.75 kW k 0.5 2 1 0.5 2 94 kW 60 kW 22 kW 94 kW 22 kW
6 MDI
5 TNI
4 TPI
RFO 22
3 FPI
60 kW 180 kW RFN 23 3 kW 3 kW 40 pF
2 FNI
GND 24
1 VCC
PIN VCTRL VCC HiZ GND
SEL (APC SW) APC ON APC ON APC OFF (LDO = H)
TEB (TE BAL) -50% 0% +50%
RFGC (AGC Gain) +12dB +6dB 0dB
GVSW Normal mode (0dB) Normal mode (0dB) CD-RW mode (+12dB)
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TA2157F/FN
Pin Function
Pin No. 1 Symbol VCC I/O 3/4 Function Description 3.3 V power supply pin Internal Circuit 3/4
2
FNI
I
Main-beam amp input pin 2 3 1 kW 120 mA
22 kW
3
FPI
I
Main-beam amp input pin
VC
4
TPI
I
Sub-beam amp input pin 4 5
2 mA
100 W
VC
2 mA
5
TNI
I
Sub-beam amp input pin
20 mA
2 mA 4 mA
6
MDI
I
Monitor photo diode amp input pin
6
1.75 kW 2 kW
4 mA
14 kW
ON: LD-OFF OFF: LD-ON 7 LDO O Laser diode amp output pin 7 1 kW
ON/OFF 50 kW
30 kW
SEL 8 SEL I GND HiZ VCC
APC Circuit OFF ON ON
LDO 8 Connected to VCC through 1 kW resistor Control signal output Control signal output
30 kW 50 kW 80 mA 40 kW
40 kW
APC circuit ON/OFF control signal, laser diode (LDO) control signal input or bottom/peak detection frequency change pin.
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TA2157F/FN
Pin No. Symbol I/O Function Description Internal Circuit
Tracking error balance adjustment signal input pin Adjusts TE signal balance by eliminating carrier component from PWM signal (3-state output, PWM carrier = 88.2 kHz) output from TC94A14F/FA/FB TEBC pin using RC-LPF and inputting DC. TEBC input voltage: GND~VCC 15 kW
9
TEBC
I
9
10
TEN
I
Tracking error signal generation amp negative-phase input pin 10
167 W
10 pF
40 mA
40 kW
40 kW
20 kW
Tracking error signal generation amp output pin. 11 TEO O Combining TEO signal and RFRP signal with TC94A14F/FA/FB configures tracking search system.
11
167 W VC 20 mA 50 kW
12
RFDC
O
RF signal peak detection output pin
12
500 W
400 mA 15 kW 40 mA 20 mA
VC
30 kW
GVSW 13 GVSW I GND HiZ
Mode CD-RW Normal 13
30 kW 50 kW 40 kW
VCC
40 kW
60 mA
AGC/FE/TE amp gain change pin
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TA2157F/FN
Pin No. Symbol I/O Function Description Internal Circuit
Reference voltage (VRO) output pin 14 VRO O * VRO = 1/2 VCC when VCC = 3.3 V
20 W 14 20 W 15 167 W 10 pF
10 kW
15
FEO
O
Focus error signal generation amp output pin
40 mA
15 kW
16 16 FEN I Focus error signal generation amp negative-phase input pin
167 W VC 20 mA 400 mA 3 pF 20 kW
Signal amp output pin for track count 17 RFRP O Combining RFRP signal and TEO signal with TC94A14F/FA/FB configures tracking search system. 17 333 W
1 mA
40 kW
VC
1 mA
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1.5 mA
18
RFRPIN
I
Signal generation amp input pin for track count
18
1 kW
33 pF
33 pF
1.5 mA
TA2157F/FN
Pin No. Symbol I/O Function Description Internal Circuit
0.2 pF 1.6 mA 20 kW 240 mA 1.2 V 100 mA VC 19 RFGO O RF signal amplitude adjustment amp output pin 19 300 W
VC
RF amplitude adjustment control signal input pin Adjusts RF signal amplitude by eliminating carrier component from PWM signal (3-state output, PWM carrier = 88.2 kHz) output from TC94A14F/FA/FB RFGC pin using RC-LPF and inputting DC. * RFGC input voltage : GND~VCC
20
RFGC
I
20
40 kW
20 kW
20 kW
40 mA
15 kW 21 AGCIN I RF signal amplitude adjustment amp input pin 21 15 kW 20 kW 60 mA 60 mA 15 kW
22
RFO
O
RF signal generation amp output pin
22
300 W 1.2 mA
23 23 RFN I RF signal generation amp input pin
120 W 3 kW 240 mA 3 kW VC
24
GND
3/4
GND pin
3/4
100 mA
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TA2157F/FN
Maximum Ratings (Ta = 25C)
Characteristics Supply voltage TA2157F Power dissipation TA2157FN Operating temperature Storage temperature PD Topr Tstg Symbol VCC Rating 5 600 mW 500 -40 ~ +85 -55 ~ +150 C C Unit V
Note 1: TA2157F: Derated above 25C in the proportion 4.76 mW/C. TA2157FN: Derated above 25C in the proportion 4 mW/C.
Electrical Characteristics (unless otherwise specified, VCC = 3.3 V, VRO = 1.65 V, Ta = 25C,
RFGC = VRO, GVSW = VCC)
Characteristics Assured power supply voltage Power supply Power supply current (normal mode) Power supply current (CD-RW mode) Reference voltage Reference Output current voltage Input current Voltage gain APC MD (R) LDO Operating reference voltage LD off voltage Input bias current Transfer resistance 1 (normal mode) Transfer resistance 2 (CD-RW mode) Frequency characteristic 1 (normal mode) Frequency characteristic 2 (CD-RW mode) Output slew rate Upper limit output voltage Lower limit output voltage Permissive load resistance Symbol VCC ICC1 3/4 ICC2 VRO IOH IOL GVAPC VMDI VLDOP IIAPC Rt1RF 3/4 Rt2RF fC1RF 3/4 fC2RF SRRF VOHRF VOLRF RLMRF 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 Test Circuit 3/4 SEL = HiZ TEBC = HiZ RFGC = HiZ Test Condition 3/4 GVSW = VCC GVSW = GND Min 3.0 13 12 1.55 3 3 3/4 170 -0.75 -200 GVSW = VCC GVSW = GND GVSW = VCC GVSW = GND 74 325 Typ. 3.3 19 18 1.65 Max 3.6 25 mA 24 1.75 V mA V/V mV V nA Unit V
When VCC = 3.3 V DV = -0.1 V DV = +0.1 V f = 1 kHz VLDO = VCC - 1.3 V VCC reference, SEL = GND VMDI = 178 mV f = 100 kHz Rf = 12 kW
3/4 3/4
200 178 -0.7 -50 85 370 13 8 35 2.4 0.2 10
3/4 3/4
3/4 186 3/4 0 95
kW 414
RF FPI (FNI) (R) RFO
-3dB point Rf = 12 kW CRFO = 20 pF GND reference
3/4 3/4 3/4
2.2 3/4 5
3/4
MHz
3/4 3/4
3/4 0.4 3/4 kW V/ms V
3/4
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TA2157F/FN
Characteristics Voltage gain 1 Voltage gain 2 Voltage gain 3 Frequency characteristic 1 AGC AGCI (R) RFGO Frequency characteristic 2 Frequency characteristic 3 Output slew rate Upper limit output voltage Lower limit output voltage Permissive load resistance Transfer resistance 1 (normal mode) Transfer resistance 2 (CD-RW mode) Gain balance 1 (normal mode) Gain balance 2 (CD-RW mode) FE FPI (FNI) (R) FEO Frequency characteristic 1 (normal mode) Frequency characteristic 2 (CD-RW mode) Output offset voltage 1 (normal mode) Output offset voltage 2 (CD-RW mode) Upper limit output voltage Lower limit output voltage Permissive load resistance Symbol GV1AG GV2AG GV3AG fC1AG fC2AG fC3AG SRAG VOHAG VOLAG RLMAG Rt1FE 3/4 Rt2FE GB1FE 3/4 GB2FE fC1FE 3/4 fC2FE VOS1FE 3/4 VOS2FE VOHFE VOLFE RLMFE 3/4 3/4 GND reference 3/4 GVSW = GND, DRt2FE GVSW = VCC GVSW = GND GVSW = VCC GVSW = GND -1 0 20 20 0 0 3.1 0.1 10 +1 3/4 3/4 3/4 CRFO = 20 pF GND reference 3/4 GVSW = VCC f = 1 kHz RFIN = 47 kW RFEFB = 33 kW GVSW = GND GVSW = VCC, DRt1FE 3/4 -3dB point 3/4 f = 1 MHz Test Circuit Test Condition RFGC = GND RFGC = HiZ RFGC = VCC RFGC = GND RFGC = HiZ RFGC = VCC Min -1.5 5.5 12 3/4 Typ. -0.5 6.5 13.5 15 15 15 25 2.4 0.2 10 145 620 0 Max 0.5 7.5 15 dB Unit
3/4 3/4 3/4 3/4 3/4
0.4 3/4 162 kW 694 +1 dB kW V/ms V MHz
3/4 3/4 3/4
2.2 3/4 5 127 545 -1
-3dB point RFEFB = 33 kW
3/4 3/4
-50 -100 2.9 3/4 5
3/4
kHz
3/4
+50 mV +100 3/4 0.3 3/4 kW V
VRO reference FPI/FNI open
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TA2157F/FN
Characteristics Transfer resistance 1 (normal mode) Transfer resistance 2 (CD-RW mode) Gain balance adjustment width Gain balance 1 (normal mode) Gain balance 2 (CD-RW mode) Frequency characteristic 1 (normal mode) Frequency characteristic 2 (CD-RW mode) Output offset voltage 1 (normal mode) Output offset voltage 2 (CD-RW mode) Upper limit output voltage Lower limit output voltage Permissive load resistance H (DA) L (DA) Symbol Rt1TE 3/4 Rt2TE DRt1 DRt2 GB1TE 3/4 GB2TE fC1TE 3/4 fC2TE VOS1TE 3/4 VOS2TE VOHTE VOLTE RLMTE 3/4 3/4 3/4 GND reference 3/4 -3dB point at low-frequency with output amplitude = 0dB when RFO = 1.2 Vpp/350 kHz in relation to VOP1DC FNI/FPI open, VRO reference, RFN-Vcc = 47 kW VRO reference, RFO = 1.2 Vpp/350 kHz RFN-Vcc = 47 kW GND reference 3/4 AMP gain after detection -3dB point at low-frequency with output amplitude = 0dB when RFO = 1.2 Vpp/700 kHz in relation to VOP1RP 1.2 VPP/5 kHz square wave (Cin > 1 mF) VRO reference, no input 3/4 VOP2RP VOHRP RLMRP 3/4 3/4 VRO reference, RFO = 700 kHz, 1.2 Vpp GND reference 3/4 GVSW = GND, DRt2FE GVSW = VCC GVSW = GND GVSW = VCC GVSW = GND -1 0 40 40 0 0 3.1 0.1 10 +1 3/4 Test Circuit Test Condition f = 1 kHz GVSW = VCC TERFB = 39 kW RTIN = 47 kW GVSW = GND TEBC = HiZ GVSW = VCC TEBC = GND TEBC = VCC Min 411 1647 +40 -60 -1 Typ. 468 1872 +50 -50 0 Max 525 kW 2092 +60 -40 +1 dB Unit
%
GVSW = VCC, DRt1FE
TE TPI (TNI) (R) TEO
-3dB point RTEFB = 39 kW
3/4 3/4
-50 -150 2.9 3/4 5 3/4
3/4
kHz
3/4
+50 mV +150 3/4 0.3 3/4 3/4 kW V
VRO reference TPI/TNI open
Detection frequency
fCDC
15
kHz
RFDC FNI (FPI) (R) RFDC
Operating reference voltage 1 Operating reference voltage 2 Upper limit output voltage Lower limit output voltage Permissive load resistance Voltage gain
VOP1DC 3/4 VOP2DC VOHDC VOLDC RLMDC GVRP
-0.15
0
0.15 V
0.6 2.9 3/4 5 3/4 3/4
0.75 3.1 0.3 10 4.4
0.9 3/4 0.5 3/4 3/4 3/4 kW dB
3/4 3/4 3/4 3/4
V
Detection frequency
fCRP
35
kHz
RFRP RFRPIN (R) RFRP
Detection time constant Operating reference voltage 1 Operating reference voltage 2 Upper limit output voltage Permissive load resistance
TRP VOP1RP
3/4
3/4 -1.0 0.7 2.9 5
37 -0.85 0.85 3.1 10
3/4 -0.7
V/ms
V 1.0 3/4 3/4 V kW
Note 2: (DA) : Normal mode Note 3: If the IC is used abnormally (ex, wrongly mounted), it may be damaged or destroyed.
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TA2157F/FN
Test Methods (supplementary)
Note: Due to the relation with RFRP detection frequency, use feed search (track cross speed) at 80 kHz or less.
1. Test method for RFRP detection frequency characteristic and detection time constant
(1) Detection frequency Set to 0dB the maximum output amplitude of the RFRP pin in relation to the operating reference voltage 1 (VOP1RP) when the sine wave shown in the figure below is input via a capacitor (Cin > 1 mF) to the RFRPIN pin and specify a frequency whose amplitude is -3dB.
RFRPIN input: 1.2 Vpp
RFRP output amplitude: [V] Specify by amplitude Set this amplitude equivalent to -3dB to 0dB Operating reference voltage 1 (VOP1RP) 35 Detection frequency RFRPIN input frequency [kHz]
(2)
Detection time constant Specify the time constant for peak and bottom detection frequencies when the square wave shown in the figure below is input via a capacitor (Cin > 1 mF) to the RFRPIN pin at the slew rate of the RFRP pin output sawtooth wave.
RFRPIN input: 1.2 Vpp f = 5 kHz (SEL = HiZ or VCC)
RFRP output
Specify by slew rate here 37 V/ms (SEL = HiZ or VCC)
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TA2157F/FN
Test Circuit
GVSW 13 VRO 14
PEAK 20 kW 20 kW 50 kW 15 kW
RFDC 12 TEO 11 10 pF TEN 10 TEBC 9 39 kW TEBC
VREF/PVREF FEI 33 kW
40 mA 40 kW 20 kW 40 kW 10 pF 15 kW 20 kW 20 kW
TEI/TEZI
FEO 15 FEN 16
20 kW RFRP/RFZI RFRP 17 RFRPIN 18 0.1 mF RFGO 19 RFGC 20 AGCIN 21 0.1 mF RFO 22 RFN 23 3 kW GND 24 3 kW
50 mA 12 kW 2 kW 1.3 V 50 kW
SEL 8 100 mF LDO 7 MDI 6 TNI 5 TPI 4 FPI 3 FNI 2 VCC 1 10 W
SEL
40 kW
12 kW 20 kW BOTTOM PEAK
1 kW 14 kW 2 kW
10 mH
LD PD
RFI
1.75 kW 240 kW 15 pF 240 kW 15 pF AGC Amp. 180 kW 40 pF k 0.5 2 1 0.5 2 94 kW 60 kW 22 kW 94 kW 22 kW
RFGC
47 kW
VC
F 47 kW E
47 kW 47 kW 47 kW 47 kW
D C B A
12 kW
60 kW 180 kW 40 pF
47 kW
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TA2157F/FN
Package Dimensions
Weight: 0.3 g (typ.)
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TA2157F/FN
Package Dimensions
Weight: 0.17 g (typ.)
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TA2157F/FN
RESTRICTIONS ON PRODUCT USE
000707EBA
* TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such TOSHIBA products could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and conditions set forth in the "Handling Guide for Semiconductor Devices," or "TOSHIBA Semiconductor Reliability Handbook" etc.. * The TOSHIBA products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury ("Unintended Usage"). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this document shall be made at the customer's own risk. * The products described in this document are subject to the foreign exchange and foreign trade laws. * The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others. * The information contained herein is subject to change without notice.
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