Sensor has configurable analogue output and a two-wire digital bus

Claimed to be the first high-side current sensor with both a digital output and a configurable analogue output, the PAC1921 can present power, current or voltage over the single output pin.

According to Microchip, all power-related output values are also available simultaneously over the two-wire digital bus, which is compatible with I2C. The sensor is available in a 10-lead 3.0 x 3.0mm VDFN package and was designed with the two-wire bus to maximise data and diagnostic reporting, with the analogue output to minimise data latency. The analogue output can also be adjusted for use with 3.0, 2.0, 1.5 or 1V microcontroller inputs.

The sensor can be used in networking, power-distribution, power-supply, computing and industrial-automation applications that cannot allow for latency when performing high-speed power management. A 39bit accumulation register and 128 times gain configuration make it suitable for both heavy and light system-load power measurement, from 0V to 32V. It has the ability to integrate more than two seconds of power-consumption data. A Read/Int pin can control the host measurement period of be used to synchronise readings of multiple devices.

The sensor is supported by the company’s PAC1921 high-side power and current monitor evaluation board (ADM00592).

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