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Final Electrical Specifications
LT6220/LT6221/LT6222 Single/Dual/Quad 60MHz, 20V/s Low Power, Rail-to-Rail Input and Output Precision Op Amp
FEATURES
s s s s s s s s s s s s s s s s
DESCRIPTIO
July 2003
s
Gain-Bandwidth Product: 60MHz Input Common Mode Range Includes Both Rails Output Swings Rail-to-Rail Low Quiescent Current: 1mA Max Input Offset Voltage: 350V Max Input Bias Current: 150nA Max Wide Supply Range: 2.2V to 12.6V Large Output Current: 50mA Typ Low Voltage Noise: 10nVHz Typ Slew Rate: 20V/s Typ Common Mode Rejection: 102dB Typ Power Supply Rejection: 105dB Typ Open Loop Gain: 100V/mV Typ Operating Temperature Range - 40C to 85C Single in the 8-Pin SO and 5-Pin Low Profile (1mm) ThinSOT Packages Dual in the 8-Pin SO and (3mm x 3mm) DFN Packages Quad in the 16-Pin SSOP Package
The LT(R)6220/LT6221/LT6222 are single/dual/quad, low power, high speed rail-to-rail input and output operational amplifiers with excellent DC performance. The LT6220/ LT6221/LT6222 feature reduced supply current, lower input offset voltage, lower input bias current and higher DC gain than other devices with comparable bandwidth. Typically, the LT6220/LT6221/LT6222 have an input offset voltage of less than 100V, an input bias current of less than 15nA and an open-loop gain of 100V/mV. The parts have an input range that includes both supply rails and an output that swings within 10mV of either supply rail to maximize the signal dynamic range in low supply applications. The LT6220/LT6221/LT6222 maintains performance for supplies from 2.2V to 12.6V and are specified at 3V, 5V and 5V supplies. The inputs can be driven beyond the supplies without damage or phase reversal of the output. The LT6220 is housed in the 8-pin SO package with the standard op amp pinout as well as the 5-pin SOT-23 package. The LT6221 is available in 8-pin SO and DFN (3mm x 3mm low profile dual fine pitch leadless) packages with the standard op amp pinout. The LT6222 features the standard quad op amp configuration and is available in the 16-Pin SSOP package. The LT6220/ LT6221/ LT6222 can be used as plug-in replacements for many op amps to improve input/output range and performance.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s s s s s s
Low Voltage, High Frequency Signal Processing Driving A/D Converters Rail-to-Rail Buffer Amplifiers Active Filters Video Amplifiers Fast Current Sensing Amplifiers
TYPICAL APPLICATIO
R2 3.24k C2 30pF
Stepped-Gain Photodiode Amplifier
VS+ PHILIPS BCV62 3 VS+ R1 100k IPD PHOTODIODE ~4pF VS+ 4 R4 10k
Stepped-Gain Photodiode Amplifier Response
PHOTO CURRENT 100A/DIV
C1 1pF
Q1
Q2 VOUT 0.5V/DIV
-
LT6220
2 VS-
1
R3 33k
LT1634-1.25 VOUT
+
VS-
VS = 1.5V TO 5V
622012 TA01
Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
U
5s/DIV
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U
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LT6220/LT6221/LT6222
ABSOLUTE
AXI U RATI GS (Note 1)
Maximum Junction Temperature .......................... 150C (DD Package) ................................................... 125C Storage Temperature .............................-65C to 150C (DD Package) ....................................-65C to 125C Lead Temperature (Soldering, 10 sec.)................. 300C
Total Supply Voltage (VS- to VS+) ......................... 12.6V Input Voltage (Note 2) .............................................. VS Input Current (Note 2) ........................................ 10mA Output Short Circuit Duration (Note 3) ............ Indefinite Operating Temperature Range (Note 4) ...-40C to 85C Specified Temperature Range (Note 5) ....-40C to 85C
PACKAGE/ORDER I FOR ATIO
TOP VIEW VOUT 1 VS- 2 +IN 3 +- 4 -IN 5 VS+
ORDER PART NUMBER LT6220CS5 LT6220IS5 S5 PART* MARKING LTAFP
NC 1 -IN 2 +IN 3 VS
-
S5 PACKAGE 5-LEAD PLASTIC SOT-23
TJMAX = 150C, JA = 250C/W (NOTE 10)
TOP VIEW
OUT A 1 -IN A 2 +IN A 3 VS
-
8 A B 7 6 5
VS+ OUT B -IN B +IN B
OUT A 1 -IN A 2 +IN A 3 B VS- 4 A
4
DD PACKAGE 8-LEAD (3mm x 3mm) PLASTIC DFN
TJMAX = 125C, JA = 160C/W (NOTE 10) UNDERSIDE METAL INTERNALLY CONNECTED TO V - (PCB CONNECTION OPTIONAL)
S8 PACKAGE 8-LEAD PLASTIC SO
TJMAX = 150C, JA = 190C/W
ORDER PART NUMBER LT6221CDD LT6221IDD
DD PART* MARKING LADZ
ORDER PART NUMBER LT6221CS8 LT6221IS8
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grades are identified by a label on the shipping container.
2
U
U
W
WW
U
W
TOP VIEW 8 - + 7 6 5 NC VS+ VOUT NC
ORDER PART NUMBER LT6220CS8 LT6220IS8 S8 PART MARKING 6220 6220I
TOP VIEW
4
S8 PACKAGE 8-LEAD PLASTIC SO
TJMAX = 150C, JA = 190C/W
TOP VIEW 8 7 6 5 VS+ OUT B -IN B +IN B
OUT A -IN A +IN A VS+ +IN B -IN B OUT B NC
1 2 3 4 5 6 7 8 B C A D
16 OUT D 15 -IN D 14 +IN D 13 VS- 12 +IN C 11 -IN C 10 OUT C 9 NC
GN PACKAGE 16-LEAD NARROW PLASTIC SSOP TJMAX = 150C, JA = 135C/W
S8 PART MARKING 6221 6221I
ORDER PART NUMBER LT6222CGN LT6222IGN
SSOP PART MARKING 6222 6222I
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LT6220/LT6221/LT6222
ELECTRICAL CHARACTERISTICS
TA = 25C, VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted
SYMBOL VOS PARAMETER Input Offset Voltage CONDITIONS VCM = 0V VCM = 0V (DD Package) VCM = 0V (S5 Package) VCM = VS VCM = VS (S5 Package) VS = 5V, VCM = 0V to 3.5V VS = 3V, VCM = 0V to 1.5V VCM = 0V VCM = 0V (DD Package) VCM = 1V VCM = VS VCM = 1V VCM = VS VCM = 1V VCM = VS 0.1Hz to 10Hz f = 10kHz f = 10kHz VS = 5V, VO = 0.5V to 4.5V, RL = 1k at VS/2 VS = 5V, VO = 1V to 4V, RL = 100 at VS/2 VS = 3V, VO = 0.5V to 2.5V, RL = 1k at VS/2 VS = 5V, VCM = 0V to 3.5V VS = 3V, VCM = 0V to 1.5V VS = 5V, VCM = 0V to 3.5V VS = 3V, VCM = 0V to 1.5V VS = 2.5V to 10V, VCM = 0V 35 3.5 30 85 82 79 76 0 84 79 No Load ISINK = 5mA ISINK = 20mA No Load ISOURCE = 5mA ISOURCE = 20mA VS = 5V VS = 3V VS = 5V, Frequency = 1MHz VS = 5V, AV = -1, RL= 1k, VO = 4V VS = 5V, AV = 1, VO = 4Vp-p VS = 5V, AV = 1, RL= 1k, VO = 2VP-P, fC = 500kHz 0.01%, VS = 5V, VSTEP = 2V, AV = 1, RL= 1k VS = 5V, AV = 2, RL= 1k VS = 5V, AV = 2, RL= 1k 20 20 35 10 105 105 2.2 5 100 325 5 130 475 45 35 0.9 60 20 1.6 77.5 300 0.3 0.3 1 2.5 40 200 650 40 250 900 MIN TYP 70 150 200 0.5 0.5 30 15 100 150 15 250 15 20 15 15 0.5 10 0.8 2 100 10 90 102 102 100 100 VS MAX 350 700 850 2.5 3 195 120 600 1100 150 600 175 250 100 100 UNITS V V V mV mV V V V V nA nA nA nA nA nA VP-P nV/Hz pA/Hz pF V/mV V/mV V/mV dB dB dB dB V dB dB V mV mV mV mV mV mV mA mA mA MHz V/s MHz dBc ns % Deg
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VOS
Input Offset Voltage Shift Input Offset Voltage Match (Channel-to-Channel) (Note 9)
IB
Input Bias Current Input Bias Current Match (Channel-to-Channel) (Note 9)
IOS
Input Offset Current Input Noise Voltage
en in CIN AVOL
Input Noise Voltage Density Input Noise Current Density Input Capacitance Large Signal Voltage Gain
CMRR
Common Mode Rejection Ratio CMRR Match (Channel-to-Channel) (Note 9) Input Common Mode Range
PSRR
Power Supply Rejection Ratio PSRR Match (Channel-to-Channel) (Note 9) Minimum Supply Voltage (Note 6)
VOL
Output Voltage Swing LOW (Note 7)
VOH
Output Voltage Swing HIGH (Note 7)
ISC IS GBW SR FPBW HD tS G
Short-Circuit Current Supply Current Per Amplifier Gain-Bandwidth Product Slew Rate Full Power Bandwidth Harmonic Distortion Settling Time Differential Gain (NTSC) Differential Phase (NTSC)
3
LT6220/LT6221/LT6222
ELECTRICAL CHARACTERISTICS
SYMBOL VOS PARAMETER Input Offset Voltage
The q denotes the specifications which apply over the 0C TA 70C temperature range. VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply, unless otherwise noted.
CONDITIONS VCM = 0V VCM = 0V (DD Package) VCM = 0V (S5 Package) VCM = VS VCM = VS (S5 Package) VS = 5V, VCM = 0V to 3.5V VS = 3V, VCM = 0V to 1.5V
q q q q q q q q q q q q q q q q q q q q q q q q q
MIN
TYP 90 180 230 0.5 0.5 30 15 110 180 1.5 3.5 20 275 15 20 15 15
MAX 500 850 1250 3 3.5 280 190 850 1400 5 10 175 800 200 300 125 125
UNITS V V V mV mV V V V V V/C V/C nA nA nA nA nA nA V/mV V/mV V/mV dB dB dB dB
VOS
Input Offset Voltage Shift
VOS TC IB
Input Offset Voltage Match (Channel-to-Channel) VCM = 0V (Note 9) VCM = 0V (DD Package) Input Offset Voltage Drift (Note 8) (S5 Package) Input Bias Current Input Bias Current Match (Channel-to-Channel) (Note 9) VCM = 1V VCM = VS - 0.2V VCM = 1V VCM = VS - 0.2V VCM = 1V VCM = VS - 0.2V VS = 5V, VO = 0.5V to 4.5V, RL = 1k at VS/2 VS = 5V, VO = 1V to 4V, RL = 100 at VS/2 VS = 3V, VO = 0.5V to 2.5V, RL = 1k at VS/2 VS = 5V, VCM = 0V to 3.5V VS = 3V, VCM = 0V to 1.5V VS = 5V, VCM = 0V to 3.5V VS = 3V, VCM = 0V to 1.5V VS = 2.5V to 10V, VCM = 0V
IOS AVOL
Input Offset Current Large Signal Voltage Gain
30 3 25 82 78 77 73 0 81 76
90 9 80 100 100 100 100 VS 104 104 2.2 8 110 375 8 150 600 2.5 50 220 750 50 300 1100
CMRR
Common Mode Rejection Ratio CMRR Match (Channel-to-Channel) (Note 9) Input Common Mode Range
V dB dB V mV mV mV mV mV mV mA mA
PSRR
Power Supply Rejection Ratio PSRR Match (Channel-to-Channel) (Note 9) Minimum Supply Voltage (Note 6)
q q q
VOL
Output Voltage Swing LOW (Note 7)
No Load ISINK = 5mA ISINK = 20mA No Load ISOURCE = 5mA ISOURCE = 20mA VS = 5V VS = 3V VS = 5V, Frequency = 1MHz VS = 5V, AV = -1, RL = 1k, VO = 4VP-P
q q q q q q q q q q q
VOH
Output Voltage Swing HIGH (Note 7)
ISC IS GBW SR
Short-Circuit Current Supply Current Per Amplifier Gain-Bandwidth Product Slew Rate
20 20 30 9
40 30 1 60 18 1.4
mA MHz V/s
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LT6220/LT6221/LT6222
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER VOS Input Offset Voltage
The q denotes the specifications which apply over the -40C TA 85C temperature range. VS = 5V, 0V; VS = 3V, 0V; VCM = VOUT = half supply unless otherwise noted. (Note 5)
CONDITIONS VCM = 0V VCM = 0V (DD Package) VCM = 0V (S5 Package) VCM = VS VCM = VS (S5 Package) VS = 5V, VCM = 0V to 3.5V VS = 3V, VCM = 0V to 1.5V
q q q q q q q q q q q q q q q q q q q q q q q q q
MIN
TYP 125 300 350 0.75 1 30 30 175 300 1.5 3.5 25 300 15 20 20 20
MAX 700 1300 2000 3.5 4.5 300 210 1200 2200 7.5 15 200 900 250 350 150 150
UNITS V V V mV mV V V V V V/C V/C nA nA nA nA nA nA V/mV V/mV V/mV dB dB dB dB
VOS
Input Offset Voltage Shift
VOS TC IB
Input Offset Voltage Match (Channel-to-Channel) VCM = 0V (Note 9) VCM = 0V (DD Package) Input Offset Voltage Drift (Note 8) (S5 Package) Input Bias Current Input Bias Current Match (Channel-to-Channel) (Note 9) VCM = 1V VCM = VS - 0.2V VCM = 1V VCM = VS - 0.2V VCM = 1V VCM = VS - 0.2V VS = 5V, VO = 0.5V to 4.5V, RL = 1k at VS/2 VS = 5V, VO = 1.5V to 3.5V, RL = 100 at VS/2 VS = 3V, VO = 0.5V to 2.5V, RL= 1k at VS/2 VS = 5V, VCM = 0V to 3.5V VS = 3V, VCM = 0V to 1.5V VS = 5V, VCM = 0V to 3.5V VS = 3V, VCM = 0V to 1.5V VS = 2.5V to 10V, VCM = 0V VCM = VO = 0.5V No Load ISINK = 5mA ISINK = 10mA No Load ISOURCE = 5mA ISOURCE = 10mA VS = 5V VS = 3V VS = 5V, Frequency = 1MHz VS = 5V, AV = -1, RL = 1k, VO = 4V
IOS AVOL
Input Offset Current Large Signal Voltage Gain
25 2.5 20 81 77 76 72 0 79 74
70 8 60 100 100 100 100 VS 104 104 2.2 10 120 220 10 160 325 2.5 60 240 450 60 325 650
CMRR
Common Mode Rejection Ratio CMRR Match (Channel-to-Channel) (Note 9) Input Common Mode Range
V dB dB V mV mV mV mV mV mV mA mA
PSRR
Power Supply Rejection Ratio PSRR Match (Channel-to-Channel) (Note 9) Minimum Supply Voltage (Note 6)
q q q q q q q q q q q q q q
VOL
Output Voltage Swing LOW (Note 7)
VOH
Output Voltage Swing HIGH (Note 7)
ISC IS GBW SR
Short-Circuit Current Supply Current Per Amplifier Gain-Bandwidth Product Slew Rate
12.5 12.5 25 8
30 25 1.1 50 15 1.5
mA MHz V/s
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LT6220/LT6221/LT6222
ELECTRICAL CHARACTERISTICS
SYMBOL VOS PARAMETER Input Offset Voltage
TA = 25C, VS = 5V, VCM = 0V, VOUT = 0V, unless otherwise noted.
CONDITIONS VCM = -5V VCM = -5V (DD Package) VCM = -5V (S5 Package) VCM = 5V VCM = 5V (S5 Package) VCM = -5V to 3.5V MIN TYP 80 150 200 0.7 0.7 70 100 150 20 250 15 20 15 15 0.5 10 0.8 2 35 3.5 82 77 VS VS+ = 2.5V to 10V, VS-= 0V, VCM = 0V No Load ISINK = 5mA ISINK = 20mA No Load ISOURCE = 5mA ISOURCE = 20mA 25 Frequency = 1MHz AV = -1, RL = 1k, VO = 4V, Measure at VO = 2V VO = 8VP-P AV = 1, RL= 1k, VO = 2Vp-p, fc = 500kHz 0.01%, VSTEP = 5V, AV = 1, RL = 1k AV = 2, RL = 1k AV = 2, RL = 1k
-
MAX 500 750 900 2.5 3 675 850 1300 150 700 175 250 100 100
UNITS V V V mV mV V V V nA nA nA nA nA nA VP-P nV/Hz pA/Hz pF V/mV V/mV dB dB
VOS
Input Offset Voltage Shift
Input Offset Voltage Match (Channel-to-Channel) VCM = -5V VCM = -5V (DD Package) IB Input Bias Current Input Bias Current Match (Channel-to-Channel) IOS Input Offset Current Input Noise Voltage en in CIN AVOL CMRR Input Noise Voltage Density Input Noise Current Density Input Capacitance Large Signal Voltage Gain Common Mode Rejection Ratio CMRR Match (Channel-to-Channel) Input Common Mode Range PSRR VOL Power Supply Rejection Ratio PSRR Match (Channel-to-Channel) Output Voltage Swing LOW (Note 7) VCM = -4V VCM = 5V VCM = -4V VCM = 5V VCM = -4V VCM = 5V 0.1Hz to 10Hz f = 10kHz f = 10kHz f = 100kHz VO = - 4V to 4V, RL = 1k VO = -2V to 2V, RL = 100 VCM = -5V to 3.5V
95 10 102 100 VS 105 105 5 100 325 5 130 475 50 1 60 20 0.8 77.5 375 0.15 0.6 1.5 40 200 650 40 250 900
+
V dB dB mV mV mV mV mV mV mA mA MHz V/s MHz dBc ns % Deg
84 79
VOH
Output Voltage Swing HIGH (Note 7)
ISC IS GBW SR FPBW HD tS G
Short-Circuit Current Supply Current Per Amplifier Gain-Bandwidth Product Slew Rate Full Power Bandwidth Harmonic Distortion Settling Time Differential Gain (NTSC) Differential Phase (NTSC)
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LT6220/LT6221/LT6222
The q denotes the specifications which apply over the 0C TA 70C temperature range. VS = 5V, VCM = 0V, VOUT = 0V, unless otherwise noted.
SYMBOL VOS PARAMETER Input Offset Voltage CONDITIONS VCM = -5V VCM = -5V (DD Package) VCM = -5V (S5 Package) VCM = 5V VCM = 5V (S5 Package) VCM = -5V to 3.5V
q q q q q q q q q q q q q q q q q q q q q
ELECTRICAL CHARACTERISTICS
MIN
TYP 100 180 230 0.75 0.75 90 90 180 1.5 3.5 20 275 15 20 15 15
MAX 650 900 1300 3 3.5 850 1100 1500 5 10 175 800 200 300 125 125
UNITS V V V mV mV V V V V/C V/C nA nA nA nA nA nA V/mV V/mV dB dB
VOS
Input Offset Voltage Shift
Input Offset Voltage Match (Channel-to-Channel) VCM = -5V (Note 9) VCM = -5V (DD Package) VOS TC IB Input Offset Voltage Drift (Note 8) (S5 Package) Input Bias Current Input Bias Current Match (Channel-to-Channel) (Note 9) IOS AVOL CMRR Input Offset Current Large Signal Voltage Gain Common Mode Rejection Ratio CMRR Match (Channel-to-Channel) (Note 9) Input Common Mode Range PSRR VOL Power Supply Rejection Ratio PSRR Match (Channel-to-Channel) (Note 9) Output Voltage Swing LOW (Note 7) No Load ISINK = 5mA ISINK = 20mA No Load ISOURCE = 5mA ISOURCE = 20mA VS+ = 2.5V to 10V, VS- = 0V, VCM = 0V VCM = -4V VCM = 4.8V VCM = -4V VCM = 4.8V VCM = -4V VCM = 4.8V VO = - 4V to 4V, RL = 1k VO = -2V to 2V, RL =100 VCM = -5V to 3.5V
30 3 80 75 VS - 81 76
90 9 100 100 VS + 104 104 8 110 375 8 150 600 50 220 750 50 300 1100 2
V dB dB mV mV mV mV mV mV mA mA MHz V/s
q q q q q q q q q q
VOH
Output Voltage Swing HIGH (Note 7)
ISC IS GBW SR
Short-Circuit Current Supply Current Per Amplifier Gain-Bandwidth Product Slew Rate Frequency = 1MHz AV = -1, RL = 1k, VO = 4V, Measure at VO = 2V
20
40 1.2 60 18
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LT6220/LT6221/LT6222
The q denotes the specifications which apply over the -40C TA 85C temperature range. VS = 5V, VCM = 0V, VOUT = 0V, unless otherwise noted. (Note 5)
SYMBOL VOS PARAMETER Input Offset Voltage CONDITIONS VCM = -5V VCM = -5V (DD Package) VCM = -5V (S5 Package) VCM = 5V VCM = 5V (S5 Package) VCM = - 5V to 3.5V
q q q q q q q q q q q q q q q q q q q q q
ELECTRICAL CHARACTERISTICS
MIN
TYP 150 300 350 0.75 1 90 175 300 1.5 3.5 25 300 15 20 20 20
MAX 800 1300 2000 3.5 4.5 950 1350 2200 7.5 15 200 900 250 350 150 150
UNITS V V V mV mV V V V V/C V/C nA nA nA nA nA nA V/mV V/mV dB dB
VOS
Input Offset Voltage Shift
VOS TC IB
Input Offset Voltage Match (Channel-to-Channel) VCM = -5V (Note 9) VCM = -5V (DD Package) Input Offset Voltage Drift (Note 8) (S5 Package) Input Bias Current Input Bias Current Match (Channel-to-Channel) (Note 9) VCM = -4V VCM = 4.8V VCM = -4V VCM = 4.8V VCM = -4V VCM = 4.8V VO = -4V to 4V, RL = 1k VO = -1V to 1V, RL = 100 VCM = -5V to 3.5V
IOS AVOL CMRR
Input Offset Current Large Signal Voltage Gain Common Mode Rejection Ratio CMRR Match (Channel-to-Channel) (Note 9) Input Common Mode Range
25 2.5 79 74 -5 79 74
70 8 100 100 5 104 104 10 120 220 10 160 325 60 240 450 60 325 650 2.25
V dB dB mV mV mV mV mV mV mA mA MHz V/s
PSRR VOL
Power Supply Rejection Ratio PSRR Match (Channel-to-Channel) (Note 9) Output Voltage Swing LOW (Note 7)
VS+ = 2.5V to 10V, VS- = 0V, VCM = 0V No Load ISINK = 5mA ISINK = 10mA No Load ISOURCE = 5mA ISOURCE = 10mA
q q q q q q q q q q
VOH
Output Voltage Swing HIGH (Note 7)
ISC IS GBW SR
Short-Circuit Current Supply Current Gain-Bandwidth Product Slew Rate Frequency = 1MHz AV = -1, RL = 1k, VO = 4V, Measure at VO = 2V
12.5
30 1.4 50 15
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The inputs are protected by back-to-back diodes. If the differential input voltage exceeds 1.4V, the input current should be limited to less than 10mA. Note 3: A heat sink may be required to keep the junction temperature below the absolute maximum rating when the output is shorted indefinitely. Note 4: The LT6220C/LT6221C/LT6222C and LT6220I/LT6221I/LT6222I are guaranteed functional over the temperature range of -40C and 85C. Note 5: The LT6220C/LT6221C/LT6222C are guaranteed to meet specified performance from 0C to 70C. The LT6220C/LT6221C/LT6222C are designed, characterized and expected to meet specified performance from -40C to 85C but is not tested or QA sampled at these temperatures. The
LT6220I/LT6221I/LT6222I are guaranteed to meet specified performance from -40C to 85C. Note 6: Minimum supply voltage is guaranteed by power supply rejection ratio test. Note 7: Output voltage swings are measured between the output and power supply rails. Note 8: This parameter is not 100% tested. Note 9: Matching parameters are the difference between amplifiers A and D and between B and C on the LT6222; between the two amplifiers on the LT6221. Note 10: Thermal resistance (JA) varies with the amount of PC board metal connected to the package. The specified values are for short traces connected to the leads. If desired, the thermal resistance can be substantially reduced by connecting Pin 2 of the LT6220CS5/LT6220IS5 or the underside metal of DD packages to a larger metal area (VS- trace).
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LT6220/LT6221/LT6222
PACKAGE DESCRIPTIO
3.5 0.05 1.65 0.05 2.15 0.05 (2 SIDES) PACKAGE OUTLINE 0.28 0.05 0.50 BSC 2.38 0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS R = 0.115 TYP 5 0.38 0.10 8
PIN 1 TOP MARK
(DD8) DFN 0203
0.200 REF
NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1) 2. ALL DIMENSIONS ARE IN MILLIMETERS 3. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 4. EXPOSED PAD SHALL BE SOLDER PLATED
U
DD Package 8-Lead Plastic DFN (3mm x 3mm)
(Reference LTC DWG # 05-08-1698)
0.675 0.05 3.00 0.10 (4 SIDES) 1.65 0.10 (2 SIDES) 0.75 0.05 4 0.28 0.05 2.38 0.10 (2 SIDES) BOTTOM VIEW--EXPOSED PAD 1 0.50 BSC 0.00 - 0.05
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LT6220/LT6221/LT6222
PACKAGE DESCRIPTIO U
S5 Package 5-Lead Plastic SOT-23
(Reference LTC DWG # 05-08-1633)
0.62 MAX 0.95 REF 2.90 BSC (NOTE 4) 1.22 REF 1.4 MIN 2.80 BSC 1.50 - 1.75 (NOTE 4) PIN ONE RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.30 - 0.45 TYP 5 PLCS (NOTE 3) 0.95 BSC 0.80 - 0.90 0.20 BSC 1.00 MAX DATUM `A' 0.01 - 0.10 1.90 BSC
S5 TSOT-23 0302
3.85 MAX 2.62 REF
0.30 - 0.50 REF 0.09 - 0.20 (NOTE 3) NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193
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LT6220/LT6221/LT6222
PACKAGE DESCRIPTIO U
S8 Package 8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.045 .005 .050 BSC 8 .189 - .197 (4.801 - 5.004) NOTE 3 7 6 5 .160 .005 .228 - .244 (5.791 - 6.197) .150 - .157 (3.810 - 3.988) NOTE 3 1 2 3 4 .053 - .069 (1.346 - 1.752) 0- 8 TYP .004 - .010 (0.101 - 0.254) .016 - .050 (0.406 - 1.270) NOTE: 1. DIMENSIONS IN .014 - .019 (0.355 - 0.483) TYP .050 (1.270) BSC
SO8 0303
.245 MIN
.030 .005 TYP RECOMMENDED SOLDER PAD LAYOUT .010 - .020 x 45 (0.254 - 0.508) .008 - .010 (0.203 - 0.254)
INCHES (MILLIMETERS) 2. DRAWING NOT TO SCALE 3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
GN Package 16-Lead Plastic SSOP (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1641)
.045 .005 .189 - .196* (4.801 - 4.978) 16 15 14 13 12 11 10 9 .009 (0.229) REF
.254 MIN
.150 - .165 .229 - .244 (5.817 - 6.198) .150 - .157** (3.810 - 3.988)
.0165 .0015
.0250 TYP 1 .015 .004 x 45 (0.38 0.10) .053 - .068 (1.351 - 1.727) 23 4 56 7 8 .004 - .0098 (0.102 - 0.249)
RECOMMENDED SOLDER PAD LAYOUT
.007 - .0098 (0.178 - 0.249) .016 - .050 (0.406 - 1.270) NOTE: 1. CONTROLLING DIMENSION: INCHES INCHES 2. DIMENSIONS ARE IN (MILLIMETERS)
0 - 8 TYP
.008 - .012 (0.203 - 0.305)
.0250 (0.635) BSC
3. DRAWING NOT TO SCALE *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
GN16 (SSOP) 0502
622012i
11
LT6220/LT6221/LT6222
TYPICAL APPLICATIO
The circuit on the front page of this data sheet is a stepped gain transimpedance photodiode amplifier. At low signal levels, the circuit has a high 100k gain, but at high signal levels the circuit automatically and smoothly changes to a low 3.2k gain. The benefit of a stepped gain approach is that it maximizes dynamic range, which is very useful on limited supplies. Put another way, in order to get 100k sensitivity and still handle a 1mA signal level without resorting to gain reduction, the circuit would need a 100V negative voltage supply. The operation of the circuit is quite simple. At low photodiode currents (below 10A) the output and inverting input of the op amp will be no more than 1V below ground. The LT1634 in parallel with R3 and Q2 keep a constant current though Q2 of about 20A. R4 maintains quiescent current through the LT1634 and pulls Q2's emitter above
3V, 1MHz, 4th Order Butterworth Filter
909 909 VIN 220pF 2.67k
47pF 1.1k 22pF GAIN (dB) 3V (VS+)
1/2 LT6221 470pF
VS
+/2
6221 TA01
RELATED PARTS
PART NUMBER LT1498/LT1499 DESCRIPTION Dual/Quad 10MHz, 6V/s Rail-to-Rail Input/ Output CLOAD Op Amps COMMENTS High DC Accuracy, 475V VOS(MAX) Max Supply Current 2.2mA/Amp
LT1800/LT1801/LT1802 Single/Dual/Quad 80MHz, 25V/s, 350V VOS(MAX), 250nA IBIAS(MAX), Max Supply Current 2mA/Amp Low Power Rail-to-Rail Input/Output Precision Op Amps LT1803/LT1804/LT1805 Single/Dual/Quad 85MHz, 100V/s Rail-to-Rail Input/Output Op Amps LT1806/LT1807 LT1809/LT1810 Single/Dual 325MHz, 140V/s Rail-to-Rail Input/ Output Op Amps 2mV VOS(MAX), Max Supply Current 3mA/Amp High DC Accuracy, 550V VOS(MAX) Max Low Noise 3.5nV/Hz Low Distortion - 80dBc at 5MHz, Power Down (LT1806)
Single/Dual 180MHz, Rail-to-Rail Input/Output Op Amps 350V/s Slew Rate, Low Distortion -90dBc at 5MHz, Power Down (LT1809)
622012i LT/TP 0703 1K * PRINTED IN USA
12
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
q
FAX: (408) 434-0507 q www.linear.com
+
-
U
ground, so Q1 is reverse biased and no current flows through R2. So for small signals, the only feedback path is R1 (and C1) and the circuit is a simple transimpedance amplifier with 100k gain. As the signal level increases though, the output of the op amp goes more negative. At 12.5A of photodiode current, the 100k gain dictates that the LT6220 output will be about 1.25V below ground. However, at that point the emitter of Q2 will be at ground, and the base of Q1 will be 1V below ground. Thus, Q1 turns on and photodiode current starts to flow through R2. The transimpedance gain is therefore now reduced to R1||R2, or about 3.1k. The circuit response is shown in the oscillogram to the right of the schematic. Note the smooth transition between the two operating gains, as well as the linearity.
1MHz Filter Frequency Response
0 -20 -40 -60 -80 -100 -120 1k 10k 100k 1M FREQUENCY (Hz) 10M 100M
6221 TA02
+
-
1.1k
2.21k
1/2 LT6221
VOUT
(c) LINEAR TECHNOLOGY CORPORATION 2003

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