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Microchip debuts combined analogue, digital current sensor

Posted: 12 Jun 2015 ?? ?Print Version ?Bookmark and Share

Keywords:Microchip Technology? current sensor? I2C? microcontroller?

Microchip Technology Inc. has recently introduced a combined analogue and digital current sensor. According to the company, the PAC1921 is the world's first high-side current sensor with both a digital output, as well as a configurable analogue output that can present power, current or voltage over the single output pin.


Simultaneously, all power related output values are also available over the 2-Wire digital bus, which is compatible with I2C. The PAC1921, was designed with the 2-Wire bus to maximise data and diagnostic reporting, while having the analogue output to minimise data latency. The analogue output can also be adjusted for use with 3V, 2V, 1.5V or 1V microcontroller inputs.

The PAC1921 is geared for 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 this device ideal for both heavy and light system-load power measurement, from zero to 32V, detailed the company. It has the ability to integrate more than two seconds of power-consumption data. Additionally, the PAC1921 has a READ/INT pin for host control of the measurement period; and this pin can be used to synchronise readings of multiple devices.

part ADM00592

The PAC1921 is supported by Microchip's PAC1921 high-side power and current monitor evaluation board (part ADM00592), which is available. The PAC1921 is available for sampling and volume production, in a 10-lead 3x3 mm VDFN package in 5,000-unit quantities.

PAC1921 block diagram

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