LT1636
Over-The-Top
Micropower Rail-to-Rail
Input and Output Op Amp
FEATURES
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DESCRIPTIO
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Rail-to-Rail Input and Output
Micropower: 50
碌
A I
Q
, 44V Supply
MSOP Package
Over-The-Top
TM
: Input Common Mode Range
Extends 44V Above V
EE
, Independent of V
CC
Low Input Offset Voltage: 225碌V Max
Specified on 3V, 5V and
鹵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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Battery- or Solar-Powered Systems
Portable Instrumentation
Sensor Conditioning
Supply Current Sensing
Battery Monitoring
MUX Amplifiers
4mA to 20mA Transmitters
The LT
廬
1636 op amp operates on all single and split supplies
with a total voltage of 2.7V to 44V drawing less than 50碌A(chǔ) of
quiescent current. The LT1636 can be shut down, making the
output high impedance and reducing the quiescent current to
4碌A(chǔ). 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 0.22碌F and 150鈩?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 V
EE
or
44V above V
EE
, independent of V
CC
.
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
V
S
= 5V, 0V
4V TO
44V
R*
LT1004-1.2
1M
R
1000
40
30
20
10
0
鈥?0
4.0
4.4
4.8
5.2 10 20 30 40 50
COMMON MODE VOLTAGE (V)
1636 G03
+
LT1636
J176
I
OUT
= 1.2
R
e.g., 10mA = 120鈩?/div>
1636 TA01
T
A
= 鈥?55擄C
T
A
= 125擄C
T
A
= 25擄C
鈥?/div>
I
OUT
SHDN
*OPTIONAL FOR LOW OUTPUT CURRENTS
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