3V/5V Low-Power, Low Input-Bias, CMOS, Rail-to-Rail I/O Op Amps

The MAX9636/MAX9637/MAX9638 are single-supply, CMOS input op amps featuring wide bandwidth at low quiescent current, making them suitable for a broad range of battery-powered applications such as portable medical instruments, portable media players, and smoke detectors. A combination of extremely low input bias currents, low input current noise and low input voltage noise allows interface to high-impedance sources such as photodiode and piezoelectric sensors.

The ICs feature a maximized ratio of gain bandwidth (GBW) to supply current. The devices operate from a single 2.1V to 5.5V supply at a typical quiescent supply current of 36µA. For additional power conservation, the MAX9636 and MAX9638 offer a low-power shutdown mode that reduces supply current to 1µA and places the amplifiers' outputs into a high-impedance state.

The ICs are specified over the automotive operating temperature range (-40°C to +125°C). The single is offered in a space-saving, 6-pin SC70 package, while the dual is offered in tiny, 8-pin SC70 and 10-pin UTQFN packages.

Applications

* Battery-Powered Devices * Piezoelectric Transducer Amplifiers * Portable Medical Instruments * Smoke Detectors * Tablets * Transimpedance Amplifiers

* Ideal for Precision Transimpedance Amplifier Applications

* Ultra-Low 0.1pA Bias Current

* Wide 1.5MHz Bandwidth

* Low Input Current-Noise Density: 0.9fA/√Hz

* Extend Battery Life

* Single-Supply Operation VDD = 2.1V to 5.5V

* Low 36µA Quiescent Current

* 1µA Quiescent Current in Shutdown

* Save Board Space

* 6- and 8-Pin SC70 and 10-Pin UTQFN Packages