General Description The KM4111 (single) and KM4121 (single with disable) are ultra-low power, low cost, voltage feedback amplifiers. These amplifiers use only 208µA of supply current and are 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. The KM4111 offers high bipolar performance at a low CMOS price. The KM4111 offers superior dynamic performance with a 35MHz small signal bandwidth and 27V/µs slew rate. The combination of lowpower, high bandwidth, and rail-to-rail performance make the KM4111 well suited for battery-powered communication/computing systems. Features ■ 208µA supply current ■ 35MHz bandwidth ■ Power down to Is = 35µA (KM4121) ■ 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 MAX4281 ■ Small package options (SOT23-5 and SOT23-6) Applications ■ Portable/battery-powered applications ■ A/D buffer ■ Active filters ■ Signal conditioning ■ Portable test instruments |