TI LMP90080QMH/NOPB

The LMP90080-Q1 is a highly integrated, multi-channel, low-power 16-bit sensor AFE. This device features a precision 16-bit delta-sigma ADC with a low-noise programmable gain amplifier and a fully differential high-impedance analog input multiplexer. A true continuous background calibration feature enables calibration across all gains and output data rates without interrupting the signal path. The background calibration feature fundamentally eliminates gain and offset errors over temperature and time, delivering measurement accuracy without sacrificing speed or power consumption. Another key feature of the LMP90080-Q1 is its continuous background sensor diagnostics, which detect open-circuit and short-circuit conditions as well as out-of-range signals without user intervention, thereby enhancing system reliability. Two sets of independent external reference pins enable multiple ratiometric measurements. In addition, two matched programmable current sources are available on the LMP90080-Q1 to power external sensors such as resistive temperature detectors and bridge sensors. Seven GPIO pins are also provided for interfacing with external LEDs and switches, simplifying control across an isolation barrier. Taken together, these features make the LMP90080-Q1 a complete analog front-end for low-power, precision sensor applications such as temperature, pressure, strain gauges, and industrial process control. The LMP90080-Q1 operates reliably over an extended temperature range of -40°C to +150°C and is available in a 28-pin package with an exposed pad.

• 16-bit low-power delta-sigma (Σ-Δ) ADC
• True continuous background calibration across all gains
• System calibration via setpoint programming
• Low-noise programmable gain (1x–128x)
• Continuous background open/short-circuit and out-of-range sensor diagnostics
• Single-cycle settling with 8 output data rates (ODR)
• 2 matched excitation currents from 100μA to 1000μA
• 4 differential (DIFF) / 7 single-ended (SE) inputs
• 2 DIFF / 4 SE inputs
• 7 general-purpose I/O pins
• Chopper-stabilized buffer for low offset
• SPI 4-wire/3-wire interface with CRC data link error detection
• 50Hz to 60Hz line noise rejection at ODR ≤13.42SPS
• Independent gain and ODR selection per channel
• Supported by WEBENCH Sensor AFE design tool
• Automatic channel sequencer

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