Power efficient instrumentation amp from ADI
1 min read
Designed to provide a combination of precision, low power and value, Analog Devices' new AD8320 amplifier is targeted at battery powered medical, instrumentation and consumer devices.
The device features a common mode rejection ratio of 100db, while consuming 75uA of power. According to ADI, this provides designers with improved signal quality and longer battery life compared to competing devices.
The instrumentation amp has a 200uV input offset and 1 uV/°C of offset drift, with improved performance available in the advanced grade AD8420B model. The AD8420 supports rail to rail operation on the output with an input voltage range that allows it to amplify signals below supply ground. The 1 to 1000 gain is set by the ratio of two external resistors, providing better gain accuracy over temperature.
Applications for the device include portable and battery powered precision signal healthcare and instrumentation applications such as infusion pumps, remote and handheld metering equipment and smartphones. It features a 2.7 to 36V single and +/-18V dual power supply range and comes in a compact MSOP-8 package.
