Current sensor is first to include configurable A/D outputs
At Sensors Expo, Microchip took the opportunity to announce a combined analogue and digital current sensor: the PAC1921. This device is the world’s first high-side current sensor with both a digital and 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 3, 2, 1.5 or 1V MCU inputs.
The PAC1921 is suitable for networking, power-distribution, power-supply, computing and industrial-automation applications that cannot allow for latency when performing high-speed power management. A 39-bit accumulation register and 128 times gain configuration make this device well-suited for both heavy and light system-load power measurement, from 0 to 32V. 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. This pin can also be used to synchronise readings of multiple devices.
The PAC1921 is supported by Microchip’s recently-released PAC1921 High-Side Power and Current Monitor Evaluation Board (ADM00592), which is available at a price of $64.99. The PAC1921 is available now for sampling and volume production, in a 10-lead 3mm2 VDFN package.
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