LMC6492 Dual/LMC6494 Quad CMOS Rail-to-Rail Input and Output Operational Amplifier
October 1994
LMC6492 Dual/LMC6494 Quad
CMOS Rail-to-Rail Input and Output Operational
Amplifier
General Description
The LMC6492/LMC6494 amplifiers were specifically devel-
oped for single supply applications that operate from −40˚C
to +125˚C. This feature is well-suited for automotive systems
because of the wide temperature range. A unique design to-
pology enables the LMC6492/LMC6494 common-mode volt-
age range to accommodate input signals beyond the rails.
This eliminates non-linear output errors due to input signals
exceeding a traditionally limited common-mode voltage
range. The LMC6492/LMC6494 signal range has a high
CMRR of 82 dB for excellent accuracy in non-inverting circuit
configurations.
The LMC6492/LMC6494 rail-to-rail input is complemented
by rail-to-rail output swing. This assures maximum dynamic
signal range which is particularly important in 5V systems.
Ultra-low input current of 150 fA and 120 dB open loop gain
provide high accuracy and direct interfacing with high imped-
ance sources.
Features
(Typical unless otherwise noted)
n
Rail-to-Rail input common-mode voltage range,
guaranteed over temperature
n
Rail-to-Rail output swing within 20 mV of supply rail,
100 kΩ load
n
Operates from 5V to 15V supply
n
Excellent CMRR and PSRR 82 dB
n
Ultra low input current 150 fA
n
High voltage gain (R
L
= 100 kΩ) 120 dB
n
Low supply current (
@
V
S
= 5V) 500 µA/Amplifier
n
Low offset voltage drift 1.0 µV/˚C
Applications
n
n
n
n
n
Automotive transducer amplifier
Pressure sensor
Oxygen sensor
Temperature sensor
Speed sensor
Connection Diagrams
8-Pin DIP/SO
14-Pin DIP/SO
DS012049-1
Top View
DS012049-2
Top View
© 1999 National Semiconductor Corporation
DS012049
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