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LT1636 Over-The-Top Micropower Rail-to-Rail Input and Output Op Amp
FEATURES

DESCRIPTIO
Rail-to-Rail Input and Output Micropower: 50A IQ, 44V Supply Operating Temperature Range: - 40C to 125C Over-The-Top(R): Input Common Mode Range Extends 44V Above VEE, Independent of VCC Low Input Offset Voltage: 225V Max Specified on 3V, 5V and 15V Supplies High Output Current: 18mA Output Shutdown Output Drives 10,000pF with Output Compensation Reverse Battery Protection to 27V High Voltage Gain: 2000V/mV High CMRR: 110dB 220kHz Gain-Bandwidth Product 8-Lead DFN, MSOP, PDIP and SO Packages
APPLICATIO S

Battery- or Solar-Powered Systems Portable Instrumentation Sensor Conditioning Supply Current Sensing Battery Monitoring MUX Amplifiers 4mA to 20mA Transmitters
The LT(R)1636 op amp operates on all single and split supplies with a total voltage of 2.7V to 44V drawing less than 50A of quiescent current. The LT1636 can be shut down, making the output high impedance and reducing the quiescent current to 4A. The LT1636 has a unique input stage that operates and remains high impedance when above the positive supply. The inputs take 44V both differential and common mode, even when operating on a 3V supply. The output swings to both supplies. Unlike most micropower op amps, the LT1636 can drive heavy loads; its rail-to-rail output drives 18mA. The LT1636 is unity-gain stable into all capacitive loads up to 10,000pF when a 0.22F and 150 compensation network is used. The LT1636 is reverse supply protected: it draws no current for reverse supply up to 27V. Built-in resistors protect the inputs for faults below the negative supply up to 22V. There is no phase reversal of the output for inputs 5V below VEE or 44V above VEE, independent of VCC. The LT1636 op amp is available in the 8-pin MSOP, PDIP and SO packages. For space limited applications the LT1636 is available in a 3mm x 3mm x 0.8mm dual fine pitch leadless package (DFN).
Over-The-Top is a registered trademark of Linear Technology Corporation. , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
Input Bias Current vs Common Mode Voltage Over-The-Top Current Source with Shutdown
INPUT BIAS CURRENT (nA)
5000 3000
VS = 5V, 0V
4V TO 44V R* LT1004-1.2 1M R
1000
40 30 20 10 0 -10 4.0 4.4 4.8 5.2 10 20 30 40 50 COMMON MODE VOLTAGE (V)
1636 G03
+
LT1636 TPO610 IOUT = 1.2 R e.g., 10mA = 120
1636 TA01
TA = - 55C TA = 125C TA = 25C
-
IOUT SHDN
*OPTIONAL FOR LOW OUTPUT CURRENTS
U
1636fc
U
U
1
LT1636
ABSOLUTE MAXIMUM RATINGS
Total Supply Voltage (V + V -)
to .............................. 44V Input Differential Voltage ......................................... 44V Input Current ...................................................... 25mA Shutdown Pin Voltage Above V - ............................. 32V Shutdown Pin Current ....................................... 10mA Output Short-Circuit Duration (Note 2) ......... Continuous Operating Temperature Range (Note 3) LT1636C/LT1636I .............................. - 40C to 85C LT1636H .......................................... - 40C to 125C
PACKAGE/ORDER I FOR ATIO
TOP VIEW NULL 1 -IN 2 +IN 3 V- 4 8 7 6 5 NULL V
+
OUT SHDN
NULL -IN +IN V-
1 2 3 4
DD PACKAGE 8-LEAD (3mm x 3mm) PLASTIC DFN
TJMAX = 125C, JA = 160C/W (NOTE 2) UNDERSIDE METAL CONNECTED TO V -
MS8 PACKAGE 8-LEAD PLASTIC MSOP
TJMAX = 150C, JA = 250C/W
ORDER PART NUMBER LT1636CDD LT1636IDD
DD PART* MARKING LAAJ
ORDER PART NUMBER LT1636CMS8 LT1636IMS8
*The temperature grades are identified by a label on the shipping container. Consult factory for parts specified with wider operating temperature ranges.
3V A D 5V ELECTRICAL CHARACTERISTICS
SYMBOL VOS PARAMETER Input Offset Voltage CONDITIONS N8 Package 0C TA 70C - 40C TA 85C S8 Package 0C TA 70C - 40C TA 85C MS8 Package 0C TA 70C - 40C TA 85C
The denotes the specifications which apply over the full operating temperature range of -40C TA 85C. VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply unless otherwise specified. (Note 4)
LT1636C/LT1636I MIN TYP MAX 50 225 400 550 50 225 600 750 50 225 700 1050 UNITS V V V V V V V V V
1636fc
2
U
U
W
WW
U
W
(Note 1)
Specified Temperature Range (Note 4) LT1636C/LT1636I .............................. - 40C to 85C LT1636H .......................................... - 40C to 125C Junction Temperature ........................................... 150C Junction Temperature (DD Package) ................... 125C Storage Temperature Range ................. - 65C to 150C Storage Temperature Range (DD Package) ....................................... - 65C to 125C Lead Temperature (Soldering, 10 sec).................. 300C
TOP VIEW
TOP VIEW 8 7 6 5 NULL V+ OUT SHDN
NULL 1 -IN 2 +IN 3 V- 4 N8 PACKAGE 8-LEAD PDIP
8 7 6 5
NULL V+ OUT SHDN
S8 PACKAGE 8-LEAD PLASTIC SO
TJMAX = 150C, JA = 150C/W (N8) TJMAX = 150C, JA = 190C/W (S8)
MS8 PART* MARKING LTCL
ORDER PART NUMBER LT1636CN8 LT1636CS8 LT1636IN8 LT1636IS8 LT1636HS8
S8 PART* MARKING 1636 1636I 1636H
U

LT1636
3V A D 5V ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
The denotes the specifications which apply over the full operating temperature range of -40C TA 85C. VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply unless otherwise specified. (Note 4)
CONDITIONS DD Package 0C TA 70C - 40C TA 85C N8 Package, - 40C TA 85C S8 Package, - 40C TA 85C MS8 Package, - 40C TA 85C DD Package, - 40C TA 85C VCM = 44V (Note 5) LT1636C/LT1636I MIN TYP MAX 75 425 900 1050 1 5 2 8 2 10 2 10 0.1 0.8 0.6 5 8 3 6 0.1 0.7 52 0.035 6 10 7 15 4 0 44 84 110 86 98 200 1300 133 100 400 2000 250 200 2 10 480 875 860 1600 2.95 2.985 2.55 2.8 4.95 4.985 4.30 4.75 7 15 20 42 12 25 25 50 90 103 27 40 42 55 60 4 12 0.5 15 1.1 5 0.05 1 27 150 120 2.5 UNITS V V V V/C V/C V/C V/C nA A nA A nA VP-P nV/Hz pA/Hz M M pF V dB dB V/mV V/mV V/mV V/mV V/mV V/mV mV mV mV V V V V mA mA mA mA dB V A A A nA A A A s s
1636fc
IOS IB
en in RIN CIN CMRR AVOL
VOL
VOH
ISC
PSRR IS
ISD
tON tOFF
U

Input Offset Voltage Drift (Note 9)
Input Offset Current Input Bias Current VCM = 44V (Note 5) VS = 0V 0.1Hz to 10Hz f = 1kHz f = 1kHz Differential Common Mode, VCM = 0V to 44V
Input Noise Voltage Input Noise Voltage Density Input Noise Current Density Input Resistance Input Capacitance Input Voltage Range Common Mode Rejection Ratio (Note 5) Large-Signal Voltage Gain
Output Voltage Swing LOW
Output Voltage Swing HIGH
Short-Circuit Current (Note 2)
Power Supply Rejection Ratio Reverse Supply Voltage Supply Current Supply Current, SHDN Shutdown Pin Current Output Leakage Current, SHDN Maximum Shutdown Pin Current Turn-On Time Turn-Off Time
VCM = 0V to VCC - 1V VCM = 0V to 44V (Note 8) VS = 3V, VO = 500mV to 2.5V, RL = 10k VS = 3V, 0C TA 70C VS = 3V, - 40C TA 85C VS = 5V, VO = 500mV to 4.5V, RL = 10k VS = 5V, 0C TA 70C VS = 5V, - 40C TA 85C No Load ISINK = 5mA VS = 5V, ISINK = 10mA VS = 3V, No Load VS = 3V, ISOURCE = 5mA VS = 5V, No Load VS = 5V, ISOURCE = 10mA VS = 3V, Short to GND VS = 3V, Short to VCC VS = 5V, Short to GND VS = 5V, Short to VCC VS = 2.7V to 12.5V, VCM = VO = 1V IS = - 100A (Note 6) VPIN5 = 2V, No Load (Note 6) VPIN5 = 0.3V, No Load (Note 6) VPIN5 = 2V, No Load (Note 5) VPIN5 = 2V, No Load (Note 6) VPIN5 = 32V, No Load (Note 5) VPIN5 = 5V to 0V, RL = 10k VPIN5 = 0V to 5V, RL = 10k

3
LT1636
3V A D 5V ELECTRICAL CHARACTERISTICS
SYMBOL GBW PARAMETER Gain Bandwidth Product (Note 5) Slew Rate (Note 7) CONDITIONS f = 1kHz 0C TA 70C - 40C TA 85C AV = - 1, RL = 0C TA 70C - 40C TA 85C
The denotes the specifications which apply over the full operating temperature range of -40C TA 85C. VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply unless otherwise specified. (Note 4)
LT1636C/LT1636I MIN TYP MAX 110 200 100 90 0.035 0.07 0.031 0.030 UNITS kHz kHz kHz V/s V/s V/s
SR
The denotes the specifications which apply over the full operating temperature range of -40C TA 85C. VS = 15V, VCM = 0V, VOUT = 0V, VSHDN = V - unless otherwise specified. (Note 4)
SYMBOL VOS PARAMETER Input Offset Voltage CONDITIONS N8 Package 0C TA 70C - 40C TA 85C S8 Package 0C TA 70C - 40C TA 85C MS8 Package 0C TA 70C - 40C TA 85C DD Package 0C TA 70C - 40C TA 85C Input Offset Voltage Drift (Note 9) N8 Package, - 40C TA 85C S8 Package, - 40C TA 85C MS8 Package, - 40C TA 85C DD Package, - 40C TA 85C

15V ELECTRICAL CHARACTERISTICS
IOS IB en in RIN CIN CMRR AVOL
VOL
VOH
4
U

LT1636C/LT1636I MIN TYP MAX 100 450 550 700 450 750 900 450 850 1200 650 1050 1200 4 8 10 10 1.0 10
UNITS V V V V V V V V V V V V V/C V/C V/C V/C nA nA VP-P nV/Hz pA/Hz M M pF
100

100

125

1 2 2 2 0.2 4 1 52 0.035 5.2 13 12000 4
Input Offset Current Input Bias Current Input Noise Voltage Input Noise Voltage Density Input Noise Current Density Input Resistance Input Capacitance Input Voltage Range Common Mode Rejection Ratio Large-Signal Voltage Gain VCM = - 15V to 29V VO = 14V, RL = 10k 0C TA 70C - 40C TA 85C No Load ISINK = 5mA ISINK = 10mA No Load ISOURCE = 5mA ISOURCE = 10mA 0.1Hz to 10Hz f = 1kHz f = 1kHz Differential Common Mode, VCM = - 15V to 14V

- 15 86 100 75 50 103 500
29
V dB V/mV V/mV V/mV
Output Voltage Swing LOW
- 14.997 - 14.500 - 14.125 14.9 14.5 14.3 14.975 14.750 14.650
- 14.95 - 14.07 - 13.35
V V V V V V
1636fc
Output Voltage Swing HIGH
LT1636
The denotes the specifications which apply over the full operating temperature range of -40C TA 85C, otherwise specifications are at TA = 25C. VS = 15V, VCM = 0V, VOUT = 0V, VSHDN = V - unless otherwise specified. (Note 4)
SYMBOL ISC PARAMETER Short-Circuit Current (Note 2) CONDITIONS Short to GND 0C TA 70C - 40C TA 85C VS = 1.35V to 22V

15V ELECTRICAL CHARACTERISTICS
LT1636C/LT1636I MIN TYP MAX 18 15 10 90 30
UNITS mA mA mA dB
PSRR IS
Power Supply Rejection Ratio Supply Current Positive Supply Current, SHDN
114 50 70 85 30 15 8 150 2
A A A nA A A A kHz kHz kHz V/s V/s V/s
VPIN5 = - 20V, VS = 22V, No Load VPIN5 = - 21.7V, VS = 22V, No Load VPIN5 = - 20V, VS = 22V, No Load VPIN5 = 32V, VS = 22V VPIN5 = - 20V, VS = 22V, No Load f = 1kHz 0C TA 70C - 40C TA 85C AV = - 1, RL = , VO = 10V Measured at 5V 0C TA 70C - 40C TA 85C

12 0.7 1.2 27 0.1 125 110 100 0.0375 0.033 0.030 220
ISHDN
Shutdown Pin Current Maximum Shutdown Pin Current Output Leakage Current, SHDN
GBW
Gain Bandwidth Product
SR
Slew Rate
0.075
3V A D 5V ELECTRICAL CHARACTERISTICS
SYMBOL VOS PARAMETER Input Offset Voltage CONDITIONS
The denotes the specifications which apply over the full operating temperature range of -40C TA 125C. VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply unless otherwise specified. (Note 4)
MIN
IOS IB
CMRR AVOL
VOL VOH
PSRR
U
LT1636H TYP 50
MAX 325 3 10 3 1 30 10
UNITS V mV V/C nA A nA A V dB dB
Input Offset Voltage Drift (Note 9) Input Offset Current VCM = 44V (Note 5) Input Bias Current VCM = 44V (Note 5) Input Voltage Range Common Mode Rejection Ratio (Note 5) Large-Signal Voltage Gain VCM = 0.3V to VCC - 1V VCM = 0.3V to 44V VS = 3V, VO = 500mV to 2.5V, RL = 10k VS = 5V, VO = 500mV to 4.5V, RL = 10k Output Voltage Swing LOW Output Voltage Swing HIGH No Load ISINK = 2.5mA VS = 3V, No Load VS = 3V, ISOURCE = 5mA VS = 5V, No Load VS = 5V, ISOURCE = 10mA Power Supply Rejection Ratio Minimum Supply Voltage VS = 2.7V to 12.5V, VCM = VO = 1V

3
0.3 72 74 200 20 400 35 1300 2000
44
V/mV V/mV V/mV V/mV 15 875 mV mV V V V V dB V
1636fc
2.925 2.35 4.925 4.10 80 2.7
5
LT1636
3V A D 5V ELECTRICAL CHARACTERISTICS
SYMBOL IS PARAMETER Reverse Supply Voltage Supply Current Supply Current, SHDN ISD Shutdown Pin Current Output Leakage Current, SHDN Maximum Shutdown Pin Current GBW SR Gain Bandwidth Product Slew Rate CONDITIONS IS = - 100A (Note 6)
The denotes the specifications which apply over the full operating temperature range of -40C TA 125C. VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply unless otherwise specified. (Note 4)
MIN

The denotes the specifications which apply over the full operating temperature range of -40C TA 125C. VS = 15V, VCM = 0V, VOUT = 0V, VSHDN = V - unless otherwise specified. (Note 4)
SYMBOL VOS PARAMETER Input Offset Voltage
15V ELECTRICAL CHARACTERISTICS
IOS IB CMRR AVOL VO PSRR IS
ISHDN
VL VH GBW SR
6
U
LT1636H TYP 42
MAX 55 75 15 200 7 5 200
UNITS V A A A nA A A A kHz kHz V/s V/s
25
VPIN5 = 2V, No Load (Note 6) VPIN5 = 0.3V, No Load (Note 6) VPIN5 = 2V, No Load (Note 5) VPIN5 = 2V, No Load (Note 6) VPIN5 = 32V, No Load (Note 5) f = 1kHz (Note 5)

110 60 0.035 0.015
200 0.07
AV = - 1, RL = (Note 7)
CONDITIONS
MIN
LT1636H TYP 100
MAX 550 3.4 11 5 50
UNITS V mV V/C nA nA dB V/mV V/mV
Input Offset Voltage Drift (Note 9) Input Offset Current Input Bias Current Common Mode Rejection Ratio Large-Signal Voltage Gain Output Voltage Swing Power Supply Rejection Ratio Minimum Supply Voltage Supply Current VCM = - 14.7V to 29V VO = 14V, RL = 10k

3
72 100 4 500 14.8 14.3 84 1.35 50 70 100 40 200 10 200 100 -21.7 -20 125 75 0.0375 0.02 220 0.075
No Load IOUT = 2.5mA VS = 1.35V to 22V

V V dB V A A A nA A A A V V kHz kHz V/s V/s
1636fc
Positive Supply Current, SHDN Shutdown Pin Current Maximum Shutdown Pin Current Output Leakage Current, SHDN Shutdown Pin Input Low Voltage Shutdown Pin Input High Voltage Gain Bandwidth Product Slew Rate
VPIN5 = - 20V, VS = 22V, No Load VPIN5 = - 21.7V, VS = 22V, No Load VPIN5 = - 20V, VS = 22V, No Load VPIN5 = 32V, VS = 22V VPIN5 = - 20V, VS = 22V, No Load VS = 22V VS = 22V f = 1kHz

AV = - 1, RL = , VO = 10V Measured at VO = 5V
LT1636
ELECTRICAL CHARACTERISTICS
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: A heat sink may be required to keep the junction temperature below absolute maximum. The JA specified for the DD package is with minimal PCB heat spreading metal. A significant reduction in JA can be obtained with expanded PCB metal area on all layers of a board. Note 3: The LT1636C and LT1636I are guaranteed functional over the operating temperature range of - 40C to 85C. The LT1636H is guaranteed functional over the operating temperature range of -40C to 125C. Note 4: The LT1636C is guaranteed to meet specified performance from 0C to 70C. The LT1636C is designed, characterized and expected to meet specified performance from - 40C to 85C but is not tested or QA sampled at these temperatures. The LT1636I is guaranteed to meet specified performance from - 40C to 85C. The LT1636H is guaranteed to meet specified performance from -40C to 125C. Note 5: VS = 5V limits are guaranteed by correlation to VS = 3V and VS = 15V or VS = 22V tests. Note 6: VS = 3V limits are guaranteed by correlation to VS = 5V and VS = 15V or VS = 22V tests. Note 7: Guaranteed by correlation to slew rate at VS = 15V and GBW at VS = 3V and VS = 15V tests. Note 8: This specification implies a typical input offset voltage of 600V at VCM = 44V and a maximum input offset voltage of 3mV at VCM = 44V. Note 9: This parameter is not 100% tested.
TYPICAL PERFOR A CE CHARACTERISTICS
Supply Current vs Supply Voltage
80
CHANGE IN INPUT OFFSET VOLTAGE (V)
70
SUPPLY CURRENT (A)
60 50 40 30 20 10 0 0 5 10 15 20 25 30 35 40 TOTAL SUPPLY VOLTAGE (V) 45 TA = 25C
100 0 -100 TA = 125C -200 TA = 25C -300 0 1 2 3 4 TOTAL SUPPLY VOLTAGE (V) 5
1636 G02
INPUT BIAS CURRENT (nA)
TA = - 55C
TA = 125C
Output Saturation Voltage vs Load Current (Output High)
1
10
OUTPUT SATURATION VOLTAGE (mV)
OUTPUT SATURATION VOLTAGE (V)
OUTPUT SATURATION VOLTAGE (V)
VS = 5V VOD = 30mV
0.1 TA = 125C TA = 25C TA = - 55C 0.01 0.1 1 10 0.0001 0.001 0.01 SOURCING LOAD CURRENT (mA)
UW
1636 G01
Minimum Supply Voltage
300 200
1000 5000 3000
Input Bias Current vs Common Mode Voltage
VS = 5V, 0V
40 30 20 10 0 -10 4.0 4.4 4.8 5.2 10 20 30 40 50 COMMON MODE VOLTAGE (V)
1636 G03
TA = - 55C TA = 125C TA = 25C
TA = - 55C
Output Saturation Voltage vs Load Current (Output Low)
100
VS = 5V VOD = 30mV 1
Output Saturation Voltage vs Input Overdrive
90 80 70 60 50 40 30 20 10 0
100
1636 G05
VS = 2.5V NO LOAD
0.1 TA = 125C TA = 25C 0.01 TA = - 55C
OUTPUT HIGH OUTPUT LOW 0 10 20 30 40 50 60 70 80 90 100 INPUT OVERDRIVE (mV)
1636 G06
100
1636 G04
0.001 0.1 1 10 0.0001 0.001 0.01 SINKING LOAD CURRENT (mA)
1636fc
7
LT1636 TYPICAL PERFOR A CE CHARACTERISTICS
0.1Hz to 10Hz Noise Voltage
INPUT NOISE VOLTAGE DENSITY (nV/Hz)
VS = 2.5V
INPUT NOISE CURRENT DENSITY (pA/Hz) 1 10 100 FREQUENCY (Hz) 1000
1636 G08
NOISE VOLTAGE (400nV/DIV)
0
1
2
3
456 TIME (SEC)
7
Open-Loop Gain and Phase Shift vs Frequency
70 60 50 40 PHASE VS = 2.5V 100
GAIN-BANDWIDTH PRODUCT (kHz)
220 200
SLEW RATE (V/s)
GAIN (dB)
30 20 10 0 -10 -20 -30 1k 10k 100k FREQUENCY (Hz) 1M
1636 G10
GAIN
Gain-Bandwidth Product and Phase Margin vs Supply Voltage
300
GAIN-BANDWIDTH PRODUCT (kHz)
COMMON MODE REJECTION RATIO (dB)
POWER SUPPLY REJECTION RATIO (dB)
280 260 240
RL = 10k f = 1kHz PHASE MARGIN
GAIN BANDWIDTH 220 200 180 0 5 10 15 20 25 30 35 40 TOTAL SUPPLY VOLTAGE (V) 45 20 30
8
UW
8 9
1636 G07
Noise Voltage Density vs Frequency
80 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0
Input Noise Current vs Frequency
70
60
50
40
30
10
1
10 100 FREQUENCY (Hz)
1000
1635 G09
Gain-Bandwidth Product vs Temperature
260 f = 1kHZ 240 VS = 15V 0.11 0.10 0.09 0.08 0.07 0.06 160 140 - 50 -25 0.05 50 25 75 0 TEMPERATURE (C) 100 125 0.12 80 60 40 20 0 -20 - 40 - 60 - 80 -100
Slew Rate vs Temperature
RISING, VS = 1.5V RISING, VS = 15V
PHASE SHIFT (DEG)
PHASE MARGIN (DEG)
FALLING, VS = 15V
VS = 1.5V 180
FALLING, VS = 1.5V
0.04 - 50
- 25
0
50 75 25 TEMPERATURE (C)
100
125
1636 G11
1636 G12
CMRR vs Frequency
50
120 110 100 90 80 70 60 50 40 30 20 1K 10K FREQUENCY (Hz) 100K
1636 G14
PSRR vs Frequency
80 70 60 50 40 30 20 10 0 -10 - 20 1k 10k FREQUENCY (Hz) 100k
1636 G15
VS = 2.5V
POSITIVE SUPPLY
40
VS = 15V VS = 1.5V
NEGATIVE SUPPLY
1636 G13
1636fc
LT1636 TYPICAL PERFOR A CE CHARACTERISTICS
Gain-Bandwidth Product and Phase Margin vs Load Resistance
450
GAIN-BANDWIDTH PRODUCT (kHz)
VS = 2.5V
400 350 300 250 200 150 GAIN BANDWIDTH 100 50 1k 10k LOAD RESISTANCE () PHASE MARGIN
OUTPUT IMPEDANCE ()
OUTPUT SWING (VP-P)
Settling Time to 0.1% vs Output Step
10 8 6
OUTPUT STEP (V)
VS = 15V AV = 1 AV = - 1 OVERSHOOT (%)
2 0 -2 -4 -6 -8 -10 0 20 40 60 80 100 120 140 160 SETTLING TIME (s)
1636 G19
60 50 40 30 20 10 0 10
THD + NOISE (%)
4
AV = - 1 AV = 1
Total Harmonic Distortion + Noise vs Load Resistance
10
1
THD + NOISE (%)
THD + NOISE (%)
0.1
VS = 3V, 0V VIN = 0.5V TO 2.5V
0.01
0.001 100 1k 10k LOAD RESISTANCE TO GROUND () 100k
UW
1636 G16
Output Impedance vs Frequency
80 70 1k 60 50 40 30 20 10
PHASE MARGIN (DEG)
Undistorted Output Swing vs Frequency
35 30 Vs = 15V DISTORTION 1% AV = 1
10k
VS = 2.5V AV = 100 AV = 10 AV = 1
25 20 15 10 5 Vs = 2.5V
100
10
1
0 100k
0.1 100
1k 10k FREQUENCY (Hz)
100k
1635 G17
0 100
1k 10k FREQUENCY (Hz)
100k
1635 G18
Capacitive Load Handling, Overshoot vs Capacitive Load
100 90 80 70 VS = 2.5V ISOURCE = 40A NO OUTPUT COMPENSATION AV = 1 AV = 2 10
Total Harmonic Distortion + Noise vs Frequency
VS = 3V, 0V VOUT = 2VP-P VCM = 1.2V RL = 50k
1
0.1
AV = 5
AV = 10
0.01
AV = - 1 AV = 1
100 1000 CAPACITIVE LOAD (pF)
10000
1636 G20
0.001 10 100 1k FREQUENCY (Hz) 10k
1636 G21
Total Harmonic Distortion + Noise vs Output Voltage
10 RL = 10k VCM = HALF SUPPLY f = 1kHz
VS = 3V TOTAL AV = 1 VIN = 2VP-P AT 1kHz VS = 1.5V VIN = 1V
1 AV = -1 VS = 1.5V 0.1 AV = -1 VS = 3V, 0V AV = 1 VS = 3V, 0V 0.001 0 2 1 OUTPUT VOLTAGE (VP-P) 3
1636 G23
AV = 1 VS = 1.5V
VS = 3V, 0V VIN = 0.2V TO 2.2V
0.01
1636 G22
1636fc
9
LT1636 TYPICAL PERFOR A CE CHARACTERISTICS
Open-Loop Gain
CHANGE IN INPUT OFFSET VOLTAGE (100V/DIV)
B C A
A B C
0V 10V VS = 15V -10V OUTPUT VOLTAGE (5V/DIV)
APPLICATIONS INFORMATION
Supply Voltage The positive supply pin of the LT1636 should be bypassed with a small capacitor (about 0.01F) within an inch of the pin. When driving heavy loads an additional 4.7F electrolytic capacitor should be used. When using split supplies, the same is true for the negative supply pin. The LT1636 is protected against reverse battery voltages up to 27V. In the event a reverse battery condition occurs, the supply current is less than 1nA. When operating the LT1636 on total supplies of 20V or more, the supply must not be brought up faster than 1s. This is especially true if low ESR bypass capacitors are used. A series RLC circuit is formed from the supply lead inductance and the bypass capacitor. 5 of resistance in the supply or the bypass capacitor will dampen the tuned circuit enough to limit the rise time. Inputs The LT1636 has two input stages, NPN and PNP (see Simplified Schematic), resulting in three distinct operating regions as shown in the Input Bias Current vs Common Mode typical performance curve. For input voltages about 0.8V or more below V +, the PNP input stage is active and the input bias current is typically - 4nA. When the input voltage is about 0.5V or less from V +, the NPN input stage is operating and the input bias current is typically 10nA. Increases in temperature will cause the voltage at which operation switches from the PNP stage to the NPN stage to move towards V +. The input offset voltage of the NPN stage is untrimmed and is typically 600V. A Schottky diode in the collector of each NPN transistor of the NPN input stage allows the LT1636 to operate with either or both of its inputs above V +. At about 0.3V above V + the NPN input transistor is fully saturated and the input bias current is typically 3A at room temperature. The input offset voltage is typically 600V when operating above V +. The LT1636 will operate with its input 44V above V - regardless of V +. The inputs are protected against excursions as much as 22V below V - by an internal 1k resistor in series with each input and a diode from the input to the negative supply. There is no output phase reversal for inputs up to 5V below V -. There are no clamping diodes between the inputs and the maximum differential input voltage is 44V. Output The output voltage swing of the LT1636 is affected by input overdrive as shown in the typical performance curves. When monitoring voltages within 100mV of V + , gain should be taken to keep the output from clipping. The output of the LT1636 can be pulled up to 27V beyond V + with less than 1nA of leakage current, provided that V + is less than 0.5V.
1636fc
10
U
W
UW
1636 G24
Large-Signal Response
Small-Signal Response
A: RL = 2k B: RL = 10k C: RL = 50k
VS = 15V AV = -1
1636 G25
VS = 15V AV = 1
1636 G26
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LT1636
APPLICATIONS INFORMATION
The normally reverse biased substrate diode from the output to V - will cause unlimited currents to flow when the output is forced below V -. If the current is transient and limited to 100mA, no damage will occur. The LT1636 is internally compensated to drive at least 200pF of capacitance under any output loading conditions. A 0.22F capacitor in series with a 150 resistor between the output and ground will compensate these amplifiers for larger capacitive loads, up to 10,000pF, at all output currents. Distortion There are two main contributors of distortion in op amps: output crossover distortion as the output transitions from sourcing to sinking current and distortion caused by nonlinear common mode rejection. Of course, if the op amp is operating inverting there is no common mode induced distortion. When the LT1636 switches between input stages there is significant nonlinearity in the CMRR. Lower load resistance increases the output crossover distortion, but has no effect on the input stage transition distortion. For lowest distortion the LT1636 should be operated single supply, with the output always sourcing current and with the input voltage swing between ground and (V + - 0.8V). See the Typical Performance Characteristics curves. Gain The open-loop gain is less sensitive to load resistance when the output is sourcing current. This optimizes performance in single supply applications where the load is returned to ground. The typical performance photo of Open-Loop Gain for various loads shows the details. Shutdown The LT1636 can be shut down two ways: using the shutdown pin or bringing V + to within 0.5V of V -. When V + is brought to within 0.5V of V - both the supply current and output leakage current drop to less than 1nA. When the shutdown pin is brought 1.2V above V -, the supply current drops to about 4A and the output leakage current is less than 1A, independent of V +. In either case the input bias current is less than 0.1nA (even if the inputs are 44V above the negative supply). The shutdown pin can be taken up to 32V above V -. The shutdown pin can be driven below V -, however the pin current through the substrate diode should be limited with an external resistor to less than 10mA. Input Offset Nulling The input offset voltage can be nulled by placing a 10k potentiometer between Pins 1 and 8 with its wiper to V - (see Figure 1). The null range will be at least 1mV.
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W
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LT1636 8 1 10k
V-
1636 F01
Figure 1. Input Offset Nulling
1636fc
11
LT1636
TYPICAL APPLICATIONS
MUX Amplifier
5V VIN1
+ -
LT1636 SHDN VOUT
5V VIN2
+ -
LT1636 SHDN
INPUT SELECT 74HC04
12
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MUX Amplifier Waveforms
VS = 5V VIN1 = 1.2kHz AT 4VP-P, VIN2 = 2.4kHz AT 2VP-P INPUT SELECT = 120Hz AT 5VP-P
1636 TA05
Optional Output Compensation for Capacitive Loads Greater Than 200pF
VIN
+
LT1636
-
0.22F 150
1636 TA09
CL 10,000pF
1636fc
LT1636
SI PLIFIED SCHEMATIC
7 V+ Q1 D1 R2 30k SHDN 5 R1 1M Q3 Q4 R5 40k Q5 Q6 Q7 Q8 D4 D5 NULL 1 R7 300 R8 300 4 V-
1636 SS
- IN Q2 + IN
2A
W
W
Q13 D2
Q19 Q25 Q23 D3 Q21 Q24 6 OUT
R3 1k 2 R4 1k 3 Q11 Q12 Q16 Q17 Q9 Q10 Q14 Q15
Q18
Q20
Q22
Q26
R6 40k 8 NULL
1636fc
13
LT1636
PACKAGE DESCRIPTION
DD Package 8-Lead Plastic DFN (3mm x 3mm)
(Reference LTC DWG # 05-08-1698)
R = 0.115 TYP 5 0.675 0.05 0.38 0.10 8
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 PIN 1 TOP MARK
5.23 (.206) MIN
0.42 0.04 (.0165 .0015) TYP
RECOMMENDED SOLDER PAD LAYOUT DETAIL "A" 0 - 6 TYP
4.90 0.15 (1.93 .006)
0.254 (.010) GAUGE PLANE
0.18 (.077) SEATING PLANE 0.22 - 0.38 (.009 - .015) TYP 0.13 0.076 (.005 .003)
MSOP (MS8) 0802
NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
1636fc
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3.00 0.10 (4 SIDES)
1.65 0.10 (2 SIDES)
(DD8) DFN 0203
0.200 REF
0.75 0.05
4 0.28 0.05 2.38 0.10 (2 SIDES)
1 0.50 BSC
0.00 - 0.05
BOTTOM VIEW--EXPOSED PAD 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
MS8 Package 8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1660)
0.889 0.127 (.035 .005)
3.2 - 3.45 (.126 - .136)
0.65 (.0256) BSC
3.00 0.102 (.118 .004) (NOTE 3)
8
7 65
0.52 (.206) REF
3.00 0.102 (.118 .004) NOTE 4
0.53 0.015 (.021 .006) DETAIL "A"
1
23
4
1.10 (.043) MAX
0.86 (.034) REF
0.65 (.0256) BSC
LT1636
PACKAGE DESCRIPTION
N8 Package 8-Lead PDIP (Narrow .300 Inch)
(Reference LTC DWG # 05-08-1510)
.400* (10.160) MAX 8 7 6 5
.300 - .325 (7.620 - 8.255)
.008 - .015 (0.203 - 0.381)
(
+.035 .325 -.015 8.255 +0.889 -0.381
)
INCHES MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .010 INCH (0.254mm)
NOTE: 1. DIMENSIONS ARE
.050 BSC
8 N N .245 MIN .160 .005 .228 - .244 (5.791 - 6.197) 1 2 3 N/2
.030 .005 TYP
RECOMMENDED SOLDER PAD LAYOUT
.010 - .020 x 45 (0.254 - 0.508) .008 - .010 (0.203 - 0.254) 0- 8 TYP
NOTE: 1. DIMENSIONS IN
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)
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.
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.255 .015* (6.477 0.381)
1
2
3
4 .130 .005 (3.302 0.127)
.045 - .065 (1.143 - 1.651)
.065 (1.651) TYP .120 (3.048) .020 MIN (0.508) MIN .018 .003 (0.457 0.076)
N8 1002
.100 (2.54) BSC
S8 Package 8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.189 - .197 (4.801 - 5.004) NOTE 3 7 6 5
.045 .005
.150 - .157 (3.810 - 3.988) NOTE 3 N/2
1
2
3
4
.053 - .069 (1.346 - 1.752)
.004 - .010 (0.101 - 0.254)
.016 - .050 (0.406 - 1.270)
.014 - .019 (0.355 - 0.483) TYP
.050 (1.270) BSC
SO8 0502
1636fc
15
LT1636
TYPICAL APPLICATIONS
Over-The-Top Comparator with Hysteresis
1M 3V TO 44V IN1 (0V TO 44V) 10k
4V TO 44V
+
LT1636 VOUT 1M 2N5087 1M
-
IN2 (0V TO 44V) 10k 1M 2N5210
V HYSTERESIS = CC 100
Lamp Outage Detector
5V TO 44V 1M LAMP ON/OFF 100k 5k 0.5 3V
-
LT1636 OUT
+
ILOAD
OUT = 0V FOR GOOD BULB 3V FOR OPEN BULB
1636 TA07
RELATED PARTS
PART NUMBER
LT1078/LT1079 LT2078/LT2079 LT1178/LT1179 LT2178/LT2179 LT1366/LT1367 LT1490/LT1491 LT1637 LT1638/LT1639 LT1782 LT1783
DESCRIPTION
Dual/Quad 55A Max, Single Supply, Precision Op Amps Dual/Quad 17A Max, Single Supply, Precison Op Amps Dual/Quad Precision, Rail-to-Rail Input and Output Op Amps Dual/Quad Over-The-Top Micropower, Rail-to-Rail Input and Output Op Amps Single Over-The-Top Micropower Rail-to-Rail Input and Output Op Amp Dual/Quad 1.2MHz Over-The-Top Micropower, Rail-to-Rail Input and Output Op Amps Micropower, Over-The-Top, SOT-23, Rail-to-Rail Input and Output Op Amp 1.2MHz, Over-The-Top, Micropower, Rail-to-Rail Input and Output Op Amp
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Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 FAX: (408) 434-0507
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Self-Buffered Micropower Reference
-
LT1636
+
1M 0.1F LT1634-1.25
VOUT = 1.25V IOUT 10mA 1N5711
1636 TA04
1636 TA03
Over-The-Top Current Sense
5V TO 44V R1 200 5V RS 0.2
+
LT1636
-
LOAD VOUT ILOAD = (RS)(R2/R1) R2 2k
VOUT (0V TO 4.3V)
1636 TA08
COMMENTS
Input/Output Common Mode Includes Ground, 70V VOS(MAX) and 2.5V/C Drift (Max), 200kHz GBW, 0.07V/s Slew Rate Input/Output Common Mode Includes Ground, 70V VOS(MAX) and 4V/C Drift (Max), 85kHz GBW, 0.04V/s Slew Rate 475V VOS(MAX), 500V/mV AVOL(MIN), 400kHz GBW Single Supply Input Range: - 0.4V to 44V, Micropower 50A per Amplifier, Rail-to-Rail Input and Output, 200kHz GBW 1.1MHz, VCM Extends 44V above VEE, Independent of VCC; MSOP Package, Shutdown Function 0.4V/s Slew Rate, 230A Supply Current per Amplifier SOT-23, 800V VOS(MAX), IS = 55A (Max), Gain-Bandwidth = 200kHz, Shutdown Pin SOT-23, 800V VOS(MAX), IS = 300A (Max), Gain-Bandwidth = 1.2MHz, Shutdown Pin
1636fc LT/LT 0505 REV C * PRINTED IN USA
www.linear.com
(c) LINEAR TECHNOLOGY CORPORATION 1998

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