Texas Instruments LMP91050 可配置 AFE
TI 适用于 NDIR 传感应用的 LMP91050 可配置 AFE 是一款专为热电堆传感器而精心优化的可编程集成传感器模拟前端，通常用于非色散红外线（NDIR）应用。TI LMP91050 AFE 可在传感器与微控制器之间提供完整的信号路径解决方案，生成与热电堆电压成比例的输出电压。LMP91050 的可编程性使其能通过统一的设计支持多种热电堆传感器，而不需要多个不同的分离解决方案。TI LMP91050 具有可编程增益放大器（PGA）、"暗信号"偏移消除以及可增大输出动态范围的可调节共模发生器（1.5V 或 2.59V）等功能。
特性
- Programmable gain amplifier
- "Dark Signal" offset cancellation
- Supports external filtering
- Common mode generator and 8 bit DAC
- 10 pin MSOP package
规范
- Programmable gain: 167V/V to 7986V/V
- Low noise (0.1 to 10 Hz): 0.1μVRMS
- Gain Drift: 100 ppm/°C (max)
- Phase Delay Drift: 500ns (max)
- Power supply voltage range: 2.7V to 5.5V
应用
- NDIR sensing
- Demand control ventilation
- Building monitoring
- CO2 cabin control — Automotive
- Alcohol detection — Automotive
- Industrial safety and security
- GHG & Freons detection platforms
Block Diagram
Evaluation Boards
Texas Instruments LMP91050SDEVAL/NOPB Evaluation Board can be used as a stand-alone or as part of Sensor AFE eval platform. It can be configured via the SPI interface and allows for testing the device with thermopile sensors, as typically used in NDIR applications. Data capturing and evaluations are simplified by connecting the SPIO-4 Digital Controller Board (SPIO-4 board) to a PC via USB and running the Sensor AFE software. The data capture board will generate the SPI signals to communicate to and capture data from the LMP91050.
View Product Detail
Texas Instruments SPIO-4 is one of several National Semiconductor digital controller/capture boards that are used by multiple evaluation systems. The objective of these software/hardware evaluation systems is to allow easy and accurate evaluation of National's signal-path devices in a lab setting. Two evaluation system software (GUIs) make use of this board: the WaveVision-5 and the Sensor AFE. The board ships with the current version of the WaveVision-5 software.
View Product Detail