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High-bandwidth op amp calibrates Vos on power-up

Posted: 28 Sep 2010 ?? ?Print Version ?Bookmark and Share

Keywords:operational amplifier? power module? strip resistor?

Maxim Integrated Products has just introduced the MAX9622, a precision operational amplifier with high gain bandwidth.

This new op amp uses a unique auto-trimming technique to precisely calibrate the input-offset voltage (Vos) on power-up. This method allows the device to attain a Vos of only 100?V (max) to permit the use of a small sense resistor, thereby improving system efficiency by reducing sense resistor power consumption.

 MAX9622 precision operational amplifier

Maxim says the MAX9622 is ideal for active filter design and low-side current sensing in power modules and automotive power supplies.

The MAX9622 offers a rail-to-rail output, a 50MHz gain bandwidth, and an input common-mode voltage range that extends below ground. These features empower the op amp to interact with a wide range of high-speed applications while giving high-frequency sampling and fast recovery from saturation.

Packaging, pricing & availability: The device is packaged in a tiny (2x2mm) 5-pin SC70, fully specified over -40?Celsius to +125?Celsius automotive temperature range. Pricing starts at $0.80 (1000units-up, FOB USA). Evaluation kits are also obtainable upon request from Maxim.

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