General Description

The KM4211 is a dual ultra-low power, low cost, voltage feedback amplifier. The KM4211 uses only 208µA of supply current per amplifier and is designed to operate from 2.5V to 5.5V or ±1.25V to ±2.75V supplies. The input voltage range extends 300mV below the negative rail and 1.2V below the positive rail.

Features

■ 208µA supply current

■ 35MHz bandwidth

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

■ Output voltage range: 0.08V to 4.88V; Vs = +5

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

■ 27V/µs slew rate

■ ±8.5mA linear output current

■ ±13mA short circuit output current

■ 21nV/√Hz input voltage noise

■ Directly replaces OPA2350, MAX4132, MAX4281

■ Small package options (SOIC-8 and MSOP-8)

Applications

■ A/D buffer

■ Smart card readers

■ Active filters

■ Keyless entry

■ Signal conditioning

■ ASCI input devices

■ Portable test instruments

■ PCMUA cards

■ Portable communications

■ Bar-code readers

■ Portable/battery-powered applications