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LT1636 Over-The-Top Micropower Rail-to-Rail Input and Output Op Amp
FEATURES
s s s s
DESCRIPTIO
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Rail-to-Rail Input and Output Micropower: 50A IQ, 44V Supply MSOP Package Over-The-TopTM: 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
APPLICATIO S
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s s s 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.
, LTC and LT are registered trademarks of Linear Technology Corporation. Over-The-Top is a trademark of Linear Technology Corporation.
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 J176 IOUT = 1.2 R e.g., 10mA = 120
1636 TA01
TA = - 55C TA = 125C TA = 25C
-
IOUT SHDN
*OPTIONAL FOR LOW OUTPUT CURRENTS
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1
LT1636
ABSOLUTE MAXIMUM RATINGS
Total Supply Voltage (V + to V -) .............................. 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
PACKAGE/ORDER INFORMATION
ORDER PART NUMBER
TOP VIEW NULL -IN +IN V- 1 2 3 4 8 7 6 5 NULL V+ OUT SHDN
TOP VIEW NULL 1 -IN 2 +IN 3 V- 4 8 7 6 5 NULL V+ OUT SHDN
LT1636CMS8 MS8 PART MARKING LTCL
MS8 PACKAGE 8-LEAD PLASTIC MSOP
TJMAX = 150C, JA = 250C/ W
Consult factory for Military grade parts.
3V, 5V ELECTRICAL CHARACTERISTICS
VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply, Pin 5 = open or VEE, Pins 1 and 8 open, TA = 25C unless otherwise noted. (Note 3)
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 Input Offset Voltage Drift (Note 8) N8 Package, - 40C TA 85C S8 Package, - 40C TA 85C MS8 Package, - 40C TA 85C VCM = 44V (Note 4) IB Input Bias Current VCM = 44V (Note 4) VS = 0V Input Noise Voltage en in Input Noise Voltage Density Input Noise Current Density 0.1Hz to 10Hz f = 1kHz f = 1kHz
q q
IOS
Input Offset Current
2
U
U
W
WW U
W
(Note 1)
Operating Temperature Range ................ - 40C to 85C Specified Temperature Range (Note 3) .. - 40C to 85C Junction Temperature ........................................... 150C Storage Temperature Range ................. - 65C to 150C Lead Temperature (Soldering, 10 sec).................. 300C
ORDER PART NUMBER LT1636CN8 LT1636CS8 LT1636IN8 LT1636IS8 S8 PART MARKING 1636 1636I
N8 PACKAGE 8-LEAD PLASTIC DIP S8 PACKAGE 8-LEAD PLASTIC SO
TJMAX = 150C, JA = 130C/ W (N8) TJMAX = 150C, JA = 190C/ W (S8)
MIN
TYP 50
MAX 225 400 550 225 600 750 225 700 850 5 8 10 0.8 0.6 8 6
UNITS V V V V V V V V V V/C V/C V/C nA A nA A nA VP-P nV/Hz pA/Hz
50
q q
50
q q q q q q q q q
1 2 2 0.1 5 3 0.1 0.7 52 0.035
LT1636 3V, 5V ELECTRICAL CHARACTERISTICS
VS = 3V, 0V; VS = 5V, 0V; VCM = VOUT = half supply, Pin 5 = open or VEE, Pins 1 and 8 open, TA = 25C unless otherwise noted. (Note 3)
SYMBOL RIN CIN CMRR AVOL PARAMETER Input Resistance Input Capacitance Input Voltage Range Common Mode Rejection Ratio (Note 4) Large-Signal Voltage Gain VCM = 0V to VCC - 1V VCM = 0V to 44V (Note 7) 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 VOL Output Voltage Swing LOW No Load ISINK = 5mA VS = 5V, ISINK = 10mA VS = 3V, No Load VS = 3V, ISOURCE = 5mA VS = 5V, No Load VS = 5V, ISOURCE = 10mA ISC Short-Circuit Current (Note 2) VS = 3V, Short to GND VS = 3V, Short to VCC VS = 5V, Short to GND VS = 5V, Short to VCC PSRR IS Power Supply Rejection Ratio Reverse Supply Voltage Supply Current (Note 5)
q q q q q q q q q q q q q q q
CONDITIONS Differential Common Mode, VCM = 0V to 44V
MIN 6 7 0 84 86 200 133 100 400 250 200
TYP 10 15 4
MAX
UNITS M M pF
44 110 98 1300
V dB dB V/mV V/mV V/mV V/mV V/mV V/mV
2000
2 480 860 2.95 2.55 4.95 4.30 7 20 12 25 2.985 2.8 4.985 4.75 15 42 25 50 103 40 42
10 875 1600
mV mV mV V V V V mA mA mA mA dB V
VOH
Output Voltage Swing HIGH
VS = 2.7V to 12.5V, VCM = VO = 1V IS = - 100A
q q
90 27
55 60 12 15 5 1 150
A A A nA A A A s s kHz kHz kHz V/s V/s V/s
Supply Current, SHDN ISD Shutdown Pin Current Output Leakage Current Maximum Shutdown Pin Current tON tOFF GBW Turn-On Time Turn-Off Time Gain Bandwidth Product (Note 4) Slew Rate (Note 6)
VPIN5 = 2V, No Load (Note 5) VPIN5 = 0.3V, No Load (Note 5) VPIN5 = 2V, No Load (Note 4) VPIN5 = 2V, No Load (Note 5) VPIN5 = 32V, No Load (Note 4) VPIN5 = 5V to 0V, RL = 10k VPIN5 = 0V to 5V, RL = 10k f = 1kHz 0C TA 70C - 40C TA 85C AV = - 1, RL = 0C TA 70C - 40C TA 85C
q q q q q
4 0.5 1.1 0.05 27 120 2.5 110 100 90 0.035 0.031 0.030 200
q q q q
SR
0.07
3
LT1636 15V ELECTRICAL CHARACTERISTICS
VS = 15V, VCM = 0V, VOUT = 0V, Pin 5 = open or VEE, Pins 1 and 8 open, TA = 25C unless otherwise noted. (Note 3)
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 Input Offset Voltage Drift (Note 8) N8 Package, - 40C TA 85C S8 Package, - 40C TA 85C MS8 Package, - 40C TA 85C
q q
MIN
TYP 100
MAX 450 550 700 450 750 900 450 850 1000 4 8 10 1.0 10
UNITS V V V V V V V V V V/C V/C V/C nA nA VP-P nV/Hz pA/Hz M M pF
100
q q
100
q q q q q q q
1 2 2 0.2 4 1 52 0.035 5.2 13 12000 4
IOS IB en in RIN CIN CMRR AVOL
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 Short to GND 0C TA 70C - 40C TA 85C VS = 1.35V to 22V 0.1Hz to 10Hz f = 1kHz f = 1kHz Differential Common Mode, VCM = - 15V to 14V
q q q q q q q q q q q q q q
- 15 86 100 75 50 103 500
29
V dB V/mV V/mV V/mV
VOL
Output Voltage Swing LOW
- 14.997 - 14.500 - 14.125 14.9 14.5 14.3 18 15 10 90 14.975 14.750 14.650 30
- 14.95 - 14.07 - 13.35
V V V V V V mA mA mA dB
VOH
Output Voltage Swing HIGH
ISC
Short-Circuit Current (Note 2)
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
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
q q q q q q q
12 0.7 1.2 27 0.1 125 110 100 220
ISHDN
Shutdown Pin Current Maximum Shutdown Pin Current Output Leakage Current
GBW
Gain Bandwidth Product
4
LT1636 15V ELECTRICAL CHARACTERISTICS
VS = 15V, VCM = 0V, VOUT = 0V, Pin 5 = open or VEE, Pins 1 and 8 open, TA = 25C unless otherwise noted. (Note 3)
SYMBOL SR PARAMETER Slew Rate CONDITIONS AV = - 1, RL = , VO = 10V Measured at 5V 0C TA 70C - 40C TA 85C
q q
MIN 0.0375 0.033 0.030
TYP 0.075
MAX
UNITS V/s V/s V/s
The q denotes specifications that apply over the full specified temperature range. 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. Note 3: The LT1636C is guaranteed to meet specified performance from 0C to 70C and is designed, characterized and expected to meet these extended temperature limits, but is not tested at -40C and 85C. The LT1636I is guaranteed to meet the extended temperature limits.
Note 4: VS = 5V limits are guaranteed by correlation to VS = 3V, and VS = 15V or VS = 22V tests. Note 5: VS = 3V limits are guaranteed by correlation to VS = 5V, and VS = 15V or VS = 22V tests. Note 6: Guaranteed by correlation to slew rate at VS = 15V, and GBW at VS = 3V and VS = 15V tests. Note 7: 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 8: 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 OUTPUT SATURATION VOLTAGE (V) OUTPUT SATURATION VOLTAGE (V) VS = 5V VOD = 30mV 10
OUTPUT SATURATION VOLTAGE (mV)
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
Input Bias Current vs Common Mode Voltage
5000 3000 1000 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)
5
LT1636 TYPICAL PERFOR A CE CHARACTERISTICS
0.1Hz to 10Hz Noise Voltage
INPUT NOISE VOLTAGE DENSITY (nV/Hz)
INPUT NOISE CURRENT DENSITY (pA/Hz) 1 10 100 FREQUENCY (Hz) 1000
1636 G08
VS = 2.5V
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 COMMON MODE REJECTION RATIO (dB)
POWER SUPPLY REJECTION RATIO (dB)
GAIN-BANDWIDTH PRODUCT (kHz)
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
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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
PSRR vs Frequency
80 70 60 50 40 30 20 10 0 -10 - 20 1k 10k FREQUENCY (Hz) 100k
1636 G15
120 110 100 90 80 70 60 50 40 30 20 1K 10K FREQUENCY (Hz) 100K
1636 G14
VS = 2.5V
POSITIVE SUPPLY
40
VS = 15V VS = 1.5V
NEGATIVE SUPPLY
1636 G13
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 SWING (VP-P)
60 50 40 30 20 10 0 100k
OUTPUT IMPEDANCE ()
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
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
0.1 100
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 1 2 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
7
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.
8
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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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LT1636 8 1 10k
V-
1636 AI01
Figure 1. Input Offset Nulling
9
LT1636
TYPICAL APPLICATIONS
MUX Amplifier
5V VIN1
+ -
LT1636 SHDN VOUT
5V VIN2
+ -
LT1636 SHDN
INPUT SELECT 74HC04
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
2 R4 1k 3 Q11 Q12 Q16 Q17 Q9 Q10 Q14 Q15 Q18 Q20
2A
10
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R3 1k
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
W
W
Q13 D2
Q19 Q25 Q23 D3 Q21 Q22 Q24 6 OUT
Q26
R6 40k 8 NULL
LT1636
PACKAGE DESCRIPTION
0.007 (0.18) 0.021 0.006 (0.53 0.015)
0 - 6 TYP SEATING PLANE 0.012 (0.30) 0.0256 REF (0.65) TYP 0.192 0.004 (4.88 0.10) 0.118 0.004** (3.00 0.102)
* DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
0.300 - 0.325 (7.620 - 8.255)
0.009 - 0.015 (0.229 - 0.381)
0.065 (1.651) TYP 0.125 (3.175) 0.020 MIN (0.508) MIN 0.018 0.003 (0.457 0.076)
(
+0.035 0.325 -0.015 8.255 +0.889 -0.381
)
0.100 0.010 (2.540 0.254)
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS. MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
0.010 - 0.020 x 45 (0.254 - 0.508) 0.008 - 0.010 (0.203 - 0.254) 0- 8 TYP
0.016 - 0.050 0.406 - 1.270
*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
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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Dimensions in inches (millimeters) unless otherwise noted. MS8 Package 8-Lead Plastic MSOP
(LTC DWG # 05-08-1660)
0.118 0.004* (3.00 0.102) 8 76 5
0.040 0.006 (1.02 0.15)
0.034 0.004 (0.86 0.102)
0.006 0.004 (0.15 0.102)
MSOP (MS8) 1197
1
23
4
N8 Package 8-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
0.045 - 0.065 (1.143 - 1.651) 0.130 0.005 (3.302 0.127) 0.400* (10.160) MAX 8 7 6 5
0.255 0.015* (6.477 0.381)
1
2
3
4
N8 1197
S8 Package 8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.189 - 0.197* (4.801 - 5.004) 0.053 - 0.069 (1.346 - 1.752) 0.004 - 0.010 (0.101 - 0.254) 8 7 6 5
0.014 - 0.019 (0.355 - 0.483)
0.050 (1.270) TYP
0.228 - 0.244 (5.791 - 6.197)
0.150 - 0.157** (3.810 - 3.988)
SO8 0996
1
2
3
4
11
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 LT1460 LT1466/LT1467 LT1490/LT1491 LT1495/LT1496 LT2078/LT2079 LT2178/LT2179 DESCRIPTION Micropower Precision Series Reference 75A Dual/Quad Rail-to-Rail Input and Output Op Amps 50A Dual/Quad Rail-to-Rail Input and Output Op Amps 1.5A Max, Dual/Quad Precision Rail-to-Rail Input and Output Op Amps 55A Dual/Quad Precision Single Supply Op Amps 17A Dual/Quad Precision Single Supply Op Amps COMMENTS Accuracy: 0.075% Max, Drift: 10ppm/C Max, 2.5V, 5V, 10V Versions Available 390V VOS(MAX), Gain Bandwidth = 120kHz 950V VOS(MAX), Gain Bandwidth = 200kHz 375V VOS(MAX), 1.5A Supply Current Max 120V VOS(MAX), Gain Bandwidth = 200kHz 120V VOS(MAX), Gain Bandwidth = 60kHz
12
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408)432-1900 q FAX: (408) 434-0507 q www.linear-tech.com
U
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
0.1V TO 44V R1 200 5V RS 0.2
+
LT1636
-
LOAD VOUT ILOAD = (RS)(R2/R1) R2 2k
VOUT (0V TO 4.3V)
1636 TA08
1636f LT/TP 1098 4K * PRINTED IN USA
(c) LINEAR TECHNOLOGY CORPORATION 1998

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