Sensor IC-MS1991

Product Overview:

The MS1991 is an integrated monitoring solution designed for measuring temperature, voltage, and current in PCB systems. It features eight single-ended input channels accessible via an I²C serial interface, which can also be configured as four differential inputs for current sensing or remote temperature measurement using BJTs. The device additionally supports on-chip temperature sensing and VCC monitoring.

An internal 10 ppm/°C precision reference minimizes the need for external components and reduces board space requirements. Configurable I²C addresses and feature sets provide design flexibility, enabling MS1991 to adapt to a wide range of applications requiring temperature, voltage, or current monitoring.

The device supports PWM output proportional to the sensed temperature of BJTs connected to channels V7 and V8, which can be used for fan or heater control.

The MS1991 is ideal for systems requiring sub-millivolt voltage resolution, 1% current measurement accuracy, ±3.5°C temperature accuracy, or any combination of these.

It is available in a 16-pin MSOP package, operates over the –40°C to +125°C temperature range, and interfaces easily with FPGAs, MCUs, or DSPs via the I²C bus.