XR18910 Datasheet | MaxLinear

Description The XR18910 is a unique sensor interface integrated circuit with an onboard 8:1 multiplexer, offset correction Digital-to-Analog Converter (DAC), instrumentation amplifier and voltage reference. The XR18910 is designed to integrate 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 patible 2-wire serial interface. The serial interface also provides the user with easy controls to the XR18910’s many functions such as input and gain selection. A linear regulator (LDO) provides a regulated voltage to power the input bridge sensors and is selectable, between 3V and 2.65V. The LDO current can be sensed and a proportional voltage present at the output of the IC for monitoring the LDO current. The XR18910 offers 8 fixed gain settings (from 2V/V to 760V/V), each with an error of only ±0.5%, that are selectable via the I2C interface. It also offers less than 3m V maximum input offset voltage, 100p A maximum input bias current, and 100p A maximum input offset current. The XR18910 is designed to operate from 2.7V to 5V supplies, specified over the industrial temperature range of -40°C to 85°C and is offered in a space saving 3.5mm x 3.5mm TQFN package. It consumes less than 559μA supply current and offers a sleep mode for added power savings. The XR18910 is well suited for industrial and consumer applications using bridge sensors. FEATURES - - Integrated features for interfacing multiple bridge sensors with an MCU or FPGA 8:1 differential MUX with I2C interface Instrumentation amplifier LDO Offset correction DAC with I2C interface (±560m V offset correction range) - - Eight selectable voltage gains from 2V/V to 760V/V with only ±0.5% gain error - - 3m V maximum input offset voltage - - 100p A maximum input bias current - - 559μA maximum supply...