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 600

Ω.

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 k

Ω load)

n Guaranteed 3V, 5V and 15V Performance

n Excellent CMRR and PSRR:

82 dB

n Ultra Low Input Current:

20 fA

130 dB

n Specified for 2 k

Ω 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

Rail-to-Rail Output

DS011714-3

DS011714-2

May 1999

© 1999 National Semiconductor Corporation

DS011714

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