TI LMP90080MHX/NOPB

The LMP9007x and LMP90080 are highly integrated multi-channel, low-power 16-bit sensor analog front ends (AFEs). These devices feature a precision 16-bit delta-sigma analog-to-digital converter (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 at 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, providing measurement accuracy without sacrificing speed and power consumption. Another function of the LMP9007x and LMP90080 is continuous background sensor diagnostics, which can detect open-circuit and short-circuit conditions as well as out-of-range signals without user intervention, enhancing system stability. Two independent external reference pins enable ratiometric measurements. In addition, the LMP90080/LMP90078 also provides two matched programmable current sources for powering external sensors such as resistive temperature detectors and bridge sensors. Moreover, both devices offer seven general-purpose input/output (GPIO) pins for interfacing with external light-emitting diodes (LEDs) and switches to simplify the control of isolation gates. With this range of features, the complete analog front ends of the LMP90080/LMP90079/LMP90078/LMP90077 can be used in precision, low-power sensor applications such as thermometers, pressure gauges, strain gauges, and industrial process control. The LMP90080/LMP90079/LMP90078/LMP90077 are available in a 28-pin exposed pad package and can operate over an extended temperature range of -40°C to +125°C.

• 16-bit low-power Σ-Δ ADC
• True continuous background calibration across all gains
• Proper system calibration using desired value programming
• Low-noise programmable gain (1x - 128x)
• Continuous background open/short-circuit and out-of-range sensor diagnostics
• Single-cycle settling, 8 output data rates (ODR)
• 2 matched excitation currents sourced from 100μA to 1000μA (LMP90080/LMP90078)
• 4 differential inputs/7 single-ended inputs (LMP90080/LMP90079)
• 2 differential inputs/4 single-ended inputs (LMP90078/LMP90077)
• 7 general-purpose I/O pins
• Chopper-stabilized buffer for low offset
• SPI 4/3-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