LMC6484 CMOS Quad Rail-to-Rail Input and Output Operational Amplifier
May 1999
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 guaran-
teed for loads down to 600Ω.
Guaranteed low voltage characteristics and low power dissi-
pation 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
Data Acquisition Systems
Transducer Amplifiers
Hand-held Analytic Instruments
Medical Instrumentation
Active Filter, Peak Detector, Sample and Hold, pH
Meter, Current Source
n
Improved Replacement for TLC274, TLC279
n
n
n
n
n
3V Single Supply Buffer Circuit
Rail-to-Rail Input
Rail-to-Rail Output
DS011714-3
DS011714-1
DS011714-2
© 1999 National Semiconductor Corporation
DS011714
www.national.com