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