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Current-sense amplifier

Maxim Integrated Products has introduced the MAX9634, the latest addition to its portfolio of high-side CSAs (current-sense amplifiers). The 1mm2 device is designed for space-constrained portable applications. Featuring an input-voltage range from 1.6 to 28V, the device is suitable for a selection of battery-powered devices, including smartphones, digital cameras, PDAs, MP3 cameras, and notebook computers. The device is optimised for compact designs that require precision monitoring. This device consumes a low 1µA of quiescent current to conserve battery life, and it is offered in a small package-a tiny, 1x1x0.6mm, 4-bump UCSP. The device features a low ±250µV (maximum) Vos and 0.5% (maximum) gain error. This high accuracy simplifies designs, and eliminates the need to worry about worst-case error tolerances. The device is fully specified over the -40 to +85°C extended temperature range, and is available in 4-bump UCSP and 6-pin SOT23 packages.