TI LMP90080QMHX/NOPB

The LMP90080-Q1 is a highly integrated multichannel low-power 16-bit sensor AFE. The device features a precision 16-bit Σ-Δ ADC with a low-noise programmable gain amplifier and a fully differential high-impedance analog input multiplexer. True continuous background calibration allows calibration at all gains and output data rates without interrupting the signal path. Background calibration essentially eliminates gain and offset errors caused by temperature and time variations, delivering measurement accuracy without sacrificing speed or power consumption.

Another feature of the LMP90080-Q1 is continuous background sensor diagnostics, which detects open-circuit, short-circuit, and out-of-range signals without user intervention, thereby improving system reliability.

Two independent sets of external reference voltage pins allow multiple ratiometric measurements. In addition, the LMP90080-Q1 provides two matched programmable current sources for excitation of external sensors such as RTDs and bridge sensors. Seven GPIO pins are also provided for connecting external LEDs and switches to simplify control across isolation barriers.

Overall, these features make the LMP90080-Q1 a complete AFE for low-power, precision sensor applications such as temperature, pressure, strain gauges, and industrial process control. The LMP90080-Q1 operates over an extended temperature range of -40°C to +150°C and is available in a 28-pin package with an exposed pad.

This IC may be damaged by ESD. Texas Instruments recommends that all ICs be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.

ESD damage can range from subtle performance degradation to complete device failure. Precision ICs may be more susceptible to damage because very small parametric changes could cause the device to fail to meet its published specifications.

• 16-bit low-power Σ-Δ ADC
• True continuous background calibration at all gains
• In-situ system calibration using desired value programming
• Low-noise programmable gain (1x - 128x)
• Continuous background open/short-circuit and out-of-range sensor diagnostics
• 8 output data rates (ODR), single-cycle settling
• Two matched excitation current sources, 100 µA to 1000 µA
• 4 differential/7 single-ended inputs
• 2 differential/4 single-ended inputs
• 7 general-purpose I/O pins
• Chopper-stabilized buffer for low offset
• SPI 4/3-wire interface with CRC data link error detection
• 50 Hz to 60 Hz line rejection at ODR ≤13.42 SPS
• Independent gain and ODR selection per channel
• Supported by WEBENCH Sensor AFE Designer
• Automatic channel sequencer

• Temperature and pressure transmitters
• Strain gauge interface
• Industrial process control