Highly-integrated sensor interface IC satisfies many requirements

Exar's XR10910 Unique Sensor Interface integrated circuit is now available from Mouser stock. The device features 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 field-programmable gate array (FPGA). The integrated offset correction DAC provides digital calibration of the variable and in many cases substantial offset voltage generated by the bridge sensors. The DAC is controlled by an I2C compatible 2 wire serial interface. The serial interface also provides the user with easy controls to many functions like input and gain selection. An integrated LDO provides a regulated voltage to power the input bridge sensors and is selectable, between 3V and 2.65V, via the serial interface for lower voltage compatibility. The LDO current can be sensed and a proportional voltage present 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 controls and weighing scales.