CSAs for Industrial, Consumer and Automotive Apps

The MAX9611/MAX9612 high-side, current-sense amplifiers (CSAs) are designed for industrial, consumer and automotive applications that require digitised current-sense data. They integrate a 12-bit ADC and a gain block that can be configured as an op amp or a comparator. This integration provides the key components for easy implementation of fault monitoring and closed-loop control applications, such as inrush-current limiting and gain control.

The MAX9611/MAX9612 integrate an I2C-controlled, 12-bit, 500sps ADC for reading 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 1.8 and 3.3V logic, providing a direct interface for modern microcontrollers. These CSAs have a wide input common-mode voltage range (0V to 60V).

Programmable (440, 110 and 55mV) full-scale sense voltages enable a wide dynamic range, accurate current measurement and flexibility in selecting sense resistor values. The MAX9611/MAX9612 are fully specified over the -40 to 125C automotive temperature range and are available in a 10-pin uMAX package.

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