XR10910IL40EVB MaxLinear

XR10910 16:1 Sensor Interface AFE FEATURES General Description Integrated features for interfacing multiple bridge sensors with an MCU or FPGA: The XR10910 is a unique sensor interface integrated circuit with an on-board 2 16:1 differential mux with I C interface 16:1 multiplexer, offset correction DAC, instrumentation amplifier and voltage Instrumentation amplifier reference. The XR10910 is designed to integrate multiple bridge sensors LDO with a microcontroller (MCU) or field-programmable gate array (FPGA). 2 Offset correction DAC with I C interface The integrated offset correction DAC provides digital calibration of the (560mV offset correction range - RTI) variable and in many cases substantial offset voltage generated by the Eight selectable voltage gains from 2V/V bridge sensors. The DAC is controlled by an I2C compatible 2 wire serial to 760V/V with only 0.5% gain error interface. The serial interface also provides the user with easy controls to the 1mV maximum input offset voltage XR10910s many functions such as input and gain selection. 100pA maximum input bias current 556A maximum supply current An integrated LDO provides a regulated voltage to power the input bridge 2.7V to 5V analog supply voltage range sensors and is selectable, between 3V and 2.65V, via the serial interface 1.8V to 5V digital supply voltage range for lower voltage compatibility. The LDO current can be sensed and a -40C to +85C temperature range proportional voltage present at the output of the IC for monitoring the LDO 6mm x 6mm QFN-40 package current. The XR10910 offers 8 fixed gain settings (from 2V/V to 760V/V), each with APPLICATIONS an error of only 0.5%, that are selectable via the I2C interface. It also offers Bridge sensor interface less than 1mV maximum input offset voltage, 100pA maximum input bias Pressure & temperature sensors current, and 100pA maximum input offset current. Strain gauge amplifier Industrial process controls The XR10910 is designed to operate from 2.7V to 5V supplies and is specified Weigh scales over the industrial temperature range of -40C to +85C. It is offered in a space saving 6mm x 6mm QFN-40 package. It consumes less than 556A Ordering Information - back page maximum supply current and offers a sleep mode for added power savings. The low power, low input bias current and integrated features make the XR10910 well suited for both industrial and consumer applications using bridge sensors. Typical Application V V CC DD 6.8F 6.8F + + 2.5 0.1F 0.1F 2 BRDG VCC VDD 0.1F BRIDGE 16 1.5 LDO IN16+ 1 IN16- 0.5 10k OUT INA / ADC C PGA 0 10nF 16:1 MUX 560mV -0.5 OFFSET TRIM V V DD DD -1 BRIDGE 1 10-BIT DAC PGA 4.7k 4.7k -1.5 IN1+ SDA 2 I C -2 IN1- CONTROL SCL -2.5 0 2 4 6 8 10 Time (sec) XR10910 AGND DGND Figure 1. Typical Application Figure 2. 0.1Hz to 10Hz RTI Voltage Noise REV 1E 1/22 RTI Noise (V)XR10910 Absolute Maximum Ratings Operating Conditions Analog Supply Voltage Range .................................. 2.7V to 5.25V Stresses beyond the limits listed below may cause permanent damage to the device. Exposure to any Absolute Digital Supply Voltage Range ....................................1.7V to 5.25V Maximum Rating condition for extended periods may affect Operating Temperature Range .................................-40C to 85C device reliability and lifetime. Junction Temperature ...........................................................150C Storage Temperature Range ...................................-65C to 150C Analog Supply Voltage (V ......................................... 0V to 5.5V CC) Lead Temperature (Soldering, 10s) ......................................260C Digital Supply Voltage (V ) .......................................... 0V to 5.5V DD Package thermal resistance ........................................ 32C/W JA Digital Input/Output (V ) ........................................... 0V to 5.5V DDIO NOTE: V .....................................................................................0 to V IN CC 1. JEDEC standard, multi-layer test boards, still air. Differential Input Voltage (current limit of 10mA) ...................... V CC ESD Rating (HBM - Human Body Model) .................................4kV REV 1E 2/22