1 Features

• Rail-to-rail input common-mode voltage range

(specified over temperature)

• Rail-to-rail output swing (within 20mV of supply

rail, 100kΩ load)

• Specified 3V, 5V, and 15V performance

• Excellent CMRR and PSRR: 82dB

• Ultra-low input current: 20fA

• Specified for 2kΩ and 600Ω loads

• Improved replacement for TLC272, TLC277

2 Applications

• Data acquisition (DAQ)

• Currency counter

• Oscilloscope (DSO)

• Intra-DC interconnect (METRO)

• Macro remote radio unit (RRU)

• Multiparameter patient monitor

• Merchant telecom rectifiers

• Train control and management

• Process analytics (pH, gas, concentration, force,

and humidity)

• Three phase UPS

3 Description

The LMC6482 and LMC6484 (LMC648x) devices

provide 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 these devices unique among rail-to-rail input

amplifiers. The devices are an excellent choice for

systems that require a large input signal range,

such as data acquisition. The LMC648x are also an

excellent upgrade for circuits using limited commonmode

range amplifiers, such as the TLC272, TLC274,

TLC277 and TLC279.

Maximum dynamic signal range is provided in low

voltage and single supply systems by the rail-to-rail

output swing of the LMC648x. The rail-to-rail output

swing is maintained for loads down to 600Ω of the

device. Specified low-voltage characteristics and lowpower

dissipation make the LMC648x a great choice

for battery-operated systems.

The LMC648x devices are available in PDIP, SOIC,

and VSSOP packages.