1 Features

• Typical values unless otherwise noted

• Ultra low supply current; 20μA/amplifier

• Specified characteristics at 3V and 5V

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

• Rail-to-rail output swing

– Within 10mV of rail, VS = 5V and RL = 25kΩ

• Low input current: 150fA

• Low input offset voltage: 0.25mV

2 Applications

• Battery-operated circuits

• Transducer interface circuits

• Portable-communication devices

• Medical applications

• Battery monitoring

3 Description

The LMC6462 and LMC6464 (LMC646x) are

micropower versions of the popular LMC6482 and

LMC6484, combining a rail-to-rail input and output

range with very low power consumption.

The LMC646x provide an input common-mode

voltage range that exceeds both rails. The rail-torail

output swing of the amplifiers, specified for

loads down to 25kΩ, provides maximum dynamic

signal range. This rail-to-rail performance of the

amplifiers, combined with a high voltage gain, makes

these device unique among rail-to-rail amplifiers. The

LMC646x are an excellent upgrade for circuits using

limited common-mode range amplifiers.

The LMC646x, with specifications at 3V and 5V, is

an excellent choice for low-voltage applications. A

quiescent power consumption of 60μW per amplifier

(at VS = 3V) can extend the useful life of batteryoperated

systems. The 150fA input current, low

offset voltage of 0.25mV, and 85dB CMRR maintain

accuracy in battery-powered systems.