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CSAs tip direct MCU interfaces

Posted: 04 Feb 2011 ?? ?Print Version ?Bookmark and Share

Keywords:current sense amplifier? op amp? comparator?

Maxim Integrated Products expands its portfolio of high-side, current-sense amplifiers (CSAs)with the MAX9611/MAX9612 devices. Designed for industrial, consumer, and automotive applications that require digitized current-sense data, the devices integrate a 12bit ADC and a gain block that can be configured as either an op amp or a comparator.

The 12bit, 500S/s I2C-controlled ADC reads the sense-resistor current, input common-mode voltage, op-amp/comparator output, op-amp/comparator reference voltage, and internal die temperature. The I2C bus is compatible with 1.8Vand 3.3V logic, providing a direct interface for modern MCUs.

Key highlights of the devices are: 0 to +60V input common-mode voltage range; 2.7V to 5.5V power-supply range, compatible with 1.8V and 3.3V logic; 5?A software shutdown current; Integrated 12bit ADC; 13?V current-sense ADC resolution; 300?V (max) current-sense ADC input offset voltage; 0.5 percent (max) current-sense ADC gain error; and I2C bus with 16 addresses.

The MAX9611/MAX9612 come in a 3 x 5mm 10-Pin?MAX package and operate at the -40C to +125C temperature range. Pricing starts at $1.50 (1,000-up, FOB USA). They are available now.

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