General Description

The KM4112 is an ultra-low power, low cost, voltage feedback amplifier. The KM4112 uses only 70µA of supply current and is designed to operate on +2.7V, +5V, or ±2.5V supplies. The input voltage range extends 300mV below the negative rail and 1.2V below the positive rail.

Features

■ 70µA supply current

■ 7.3MHz bandwidth

■ Fully specified at +2.7V and +5V supplies

■ Output voltage range: 0.04V to 4.96V; Vs = +5

■ Input voltage range: -0.3V to +3.8V; Vs = +5

■ 9V/µs slew rate

■ ±4mA linear output current

■ ±9mA short circuit output current

■ 29nV/√Hz input voltage noise

■ Competes with low power CMOS amps

■ Small package option (SOT23-5)

Applications

■ Portable/battery-powered applications

■ A/D buffer

■ Active filters

■ Signal conditioning

■ Portable test instruments