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LMP90097MH Datasheet PDF - Texas Instruments

Part NumberLMP90097MH TI
Texas Instruments TI
DescriptionSensor AFE System: Multichannel, Low-Power, 24-Bit Sensor AFE With True Continuous Background Calibration
LMP90097MH Datasheet PDF : LMP90097MH pdf   
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Description
The LMP90xxx is a highly integrated, multichannel, low-power, 24-bit Sensor AFEs. The devices features a precision, 24-bit Sigma-Delta 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 allows calibration at all gains and output data rates without interrupting the signal path. The background calibration feature essentially eliminates gain and offset errors across temperature and time, providing measurement accuracy without sacrificing speed and power consumption.

Features
• 24-Bit, Low-Power Sigma-Delta ADC
• True Continuous Background Calibration at all
   Gains
• In-Place System Calibration Using Expected
   Value Programming
• Low-Noise Programmable Gain (1x to 128x)
• Continuous Background Open / Short and Out-of
   Range Sensor Diagnostics
• 8 Output Data Rates (ODR) With Single-Cycle
   Settling
• 2 Matched Excitation Current Sources From 100
   µA to 1000 µA (LMP90100/LMP90098)
• 4-DIFF / 7-SE Inputs (LMP90100/LMP90099)
• 2-DIFF / 4-SE Inputs (LMP90098/LMP90097)
• 7 General-Purpose Input/Output Pins
• Chopper-Stabilized Buffer for Low Offset
• SPI 4/3-wire 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
• Key Specifications
   – ENOB/NFR Up to 21.5/19 Bits
   – Offset Error (Typical) 8.4 nV
   – Gain Error (Typical) 7 ppm
   – Total Noise < 10 µV-rms
   – Integral Nonlinearity (INL Maximum) ± 15 ppm of FSR
   – Output Data Rates (ODR) 1.6775 - 214.65 SPS
   – Analog Voltage, VA 2.85 to 5.5 V
   – Operating Temp Range –40°C to 125°C
   – 28-Pin HTSSOP Exposed Pad

Applications
• Temperature and Pressure Transmitters
• Strain Gauge Interface
• Industrial Process Control

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