Overview
The LMP90100MHE/NOPB, produced by Texas Instruments, is a highly integrated, multichannel, low-power, 24-bit Sensor Analog Front-End (AFE) system. This device 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. It is designed to provide high accuracy and reliability in various sensor applications, including temperature, pressure, strain gauge, and industrial process control.
Key Specifications
| Parameter | Typical Value | Unit |
|---|---|---|
| Resolution | 24 Bits | |
| ENOB/NFR | Up to 21.5/19 Bits | |
| Offset Error | 8.4 nV | |
| Gain Error | 7 ppm | |
| Total Noise | < 10 µV-rms | |
| Integral Nonlinearity (INL) | ± 15 ppm of FSR | |
| Output Data Rates (ODR) | 1.6775 - 214.65 SPS | |
| Analog Voltage, VA | 2.85 to 5.5 V | |
| Operating Temperature Range | -40°C to 125°C | |
| Package | 28-Pin HTSSOP Exposed Pad |
Key Features
- True Continuous Background Calibration at all gains and output data rates without interrupting the signal path.
- 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) and 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.
Applications
- Temperature and Pressure Transmitters.
- Strain Gauge Interface.
- Industrial Process Control.
Q & A
- What is the resolution of the LMP90100MHE/NOPB ADC?
The LMP90100MHE/NOPB features a 24-bit Sigma-Delta ADC.
- What is the typical offset error of the device?
The typical offset error is 8.4 nV.
- What are the output data rates available for this device?
The output data rates range from 1.6775 to 214.65 SPS.
- Does the device support continuous background calibration?
Yes, it supports true continuous background calibration at all gains and output data rates.
- What is the operating temperature range of the LMP90100MHE/NOPB?
The operating temperature range is -40°C to 125°C.
- What types of inputs are available on the LMP90100/LMP90099?
The LMP90100/LMP90099 have 4-DIFF / 7-SE inputs.
- Are there any built-in diagnostic features?
Yes, the device includes continuous background open / short and out-of-range sensor diagnostics.
- What is the purpose of the excitation current sources in the LMP90100/LMP90098?
The excitation current sources are used to excite external sensors such as resistive temperature detectors and bridge sensors.
- Does the device support SPI communication?
Yes, it supports SPI 4/3-wire communication with CRC data link error detection.
- What is the package type of the LMP90100MHE/NOPB?
The device is available in a 28-Pin HTSSOP package with an exposed pad.
