XR10910数据手册集成电路（IC）的模拟前端（AFE）规格书PDF

描述 Description

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 the XR10910's many functions such as 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.
The XR10910 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.
The XR10910 is designed to operate from 2.7V to 5V supplies and is specified over the industrial temperature range of -40°C to 85°C. It is offered in a space saving 6mm x 6mm QFN-40 package. It consumes less than 556µA maximum supply current and offers a sleep mode for added power savings.

特性 Features

·Force sensing
·Integrated features for interfacing multiple bridge sensors with an MCU or FPGA:
·16:1 differential mux with I2C interface
·Instrumentation amplifier
·LDO
·Offset correction DAC with I2C interface (±560mV offset correction range - RTI)
·Eight selectable voltage gains from 2V/V to 760V/V with only ±0.5% gain error
·1mV maximum input offset voltage
·100pA maximum input bias current
·556µA maximum supply current
·2.7V to 5V analog supply voltage range
·1.8V to 5V digital supply voltage range
·-40°C to 85°C temperature range
·6x6mm QFN-40

应用 Application

·Bridge sensor interface
·Pressure & temperature sensors
·Strain gauge amplifier
·Weigh scales
·Industrial process controls