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.
Another feature of the LMP90100/LMP90099/LMP90098/LMP90097 is continuous background sensor diagnostics, allowing the detection of open and short-circuit conditions and out-of-range signals, without requiring user intervention, resulting in enhanced system reliability.
Two sets of independent external reference voltage pins allow multiple ratiometric measurements. In addition, two matched programmable current sources are available in the LMP90100/LMP90098 to excite external sensors such as resistive temperature detectors and bridge sensors. Furthermore, seven GPIO pins are provided for interfacing to external LEDs and switches to simplify control across an isolation barrier.
Collectively, these features make the LMP90100/LMP90099/LMP90098/LMP90097 complete analog front-ends for low-power, precision sensor applications such as temperature, pressure, strain gauge, and industrial process control. The LMP90100/LMP90099/LMP90098/LMP90097 are ensured over the extended temperature range of –40°C to +125°C and are available in a 28-pin HTSSOP package with an exposed pad.
| Type | Title | Date | |
|---|---|---|---|
| * | Data sheet | LMP90100 and LMP9009x Sensor AFE System: Multichannel, Low-Power, 24-Bit Sensor AFE With True Continuous Background Calibration datasheet (Rev. S) | 26 Jan 2016 |
| Technical article | How smart AFEs offer an integrated analog solution for thermoelectric cooling control | 04 Jan 2022 | |
| E-book | Fundamentals of Precision ADC Noise Analysis | 19 Jun 2020 | |
| User guide | SPIO-4 Precision Signal-Path Controller Board User Guide (Rev. A) | 05 May 2018 | |
| Application note | Digital Filter Types in Delta-Sigma ADCs | 27 Jun 2017 | |
| Application note | LMP90100 True Continuous Background Calibration (Rev. B) | 01 May 2013 | |
| Application note | MSP430 Interface to LMP90100 Code Library Application Report (Rev. A) | 01 May 2013 | |
| Application note | Microcontroller Firmware Considerations for the National LMP90100 Sensor AFE (Rev. A) | 01 May 2013 | |
| User guide | LMP90100 Sensor AFE Evaluation Board User's Guide (Rev. A) | 31 Jul 2012 |
For additional terms or required resources, click any title below to view the detail page where available.
Already own the LMP90100EB and SPIO-4 boards? |
The LMP90100EB is the evaluation board for the LMP90XXX family. In order to interface this board to a PC, a SPIO-4 digital controller board (order both boards separately) is required. (...)
| Package | Pins | Download |
|---|---|---|
| HTSSOP (PWP) | 28 | View options |
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