LMC6484
CMOS Quad Rail-to-Rail Input and Output Operational
Amplifier
General Description
The LMC6484 provides a common-mode range that extends
to both supply rails. This rail-to-rail performance combined
with excellent accuracy, due to a high CMRR, makes it
unique among rail-to-rail input amplifiers.
It is ideal for systems, such as data acquisition, that require
a large input signal range. The LMC6484 is also an excellent
upgrade for circuits using limited common-mode range am-
plifiers such as the TLC274 and TLC279.
Maximum dynamic signal range is assured in low voltage
and single supply systems by the LMC6484’s rail-to-rail out-
put swing. The LMC6484’s rail-to-rail output swing is guar-
anteed for loads down to 600Ω.
Guaranteed low voltage characteristics and low power dis-
sipation make the LMC6484 especially well-suited for
battery-operated systems.
See the LMC6482 data sheet for a Dual CMOS operational
amplifier with these same features.
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 Guaranteed 3V, 5V and 15V Performance
n Excellent CMRR and PSRR: 82 dB
n Ultra Low Input Current: 20 fA
n High Voltage Gain (R
L
= 500 kΩ): 130 dB
n Specified for 2 kΩ and 600Ω loads
Applications
n Data Acquisition Systems
n Transducer Amplifiers
n Hand-held Analytic Instruments
n Medical Instrumentation
n Active Filter, Peak Detector, Sample and Hold, pH
Meter, Current Source
n Improved Replacement for TLC274, TLC279
3V Single Supply Buffer Circuit
Rail-to-Rail Input
DS011714-1
DS011714-2
Rail-to-Rail Output
DS011714-3
August 2000
LMC6484 CMOS Quad Rail-to-Rail Input and Output Operational Amplifier
© 2001 National Semiconductor Corporation DS011714 www.national.com
