Exar's XR10910 unique sensor interface integrated circuit has an on-board 16: 1 multiplexer, offset correction DAC, instrumentation amplifier, and voltage reference. It also integrates multiple bridge sensors with a microcontroller (MCU) or a field programmable gate array (FPGA).
The integrated offset correction DAC provides digital calibration of the variables, and in many cases a large amount of offset voltage is generated by the bridge sensor. The DAC is controlled by an I2C compatible 2-wire serial interface. The serial interface also provides users with the ability to easily control many functions, such as input and gain selection.
The integrated LDO provides a stable voltage to power the input bridge sensors and can be selected between 3V and 2.65V via the serial interface for lower voltage compatibility. The LDO current can be detected and a proportional voltage exists at the output of the IC for monitoring the LDO current.
Typical applications include bridge sensor interfaces, pressure and temperature sensors, strain gauge amplifiers, industrial process control and scales.
