LMP91050
- Programmable Gain Amplifier
- Dark Signal Offset Cancellation
- Supports External Filtering
- Common-Mode Generator and 8-Bit DAC
- Key Specifications
- Programmable Gain 167 to 7986 V/V
- Low Noise (0.1 to 10 Hz) 0.1 µVRMS
- Gain Drift 100 ppm/°C (Maximum)
- Phase Delay Drift 500 ns (Maximum)
- Power Supply Voltage Range 2.7 to 5.5 V
The LMP91050 device is a programmable integrated Sensor Analog Front End (AFE) optimized for thermopile sensors, as typically used in NDIR applications. It provides a complete signal path solution between a sensor and microcontroller that generates an output voltage proportional to the thermopile voltage. The programmability of the LMP91050 enables it to support multiple thermopile sensors with a single design as opposed to the multiple discrete solutions.
The LMP91050 features a programmable gain amplifier (PGA), dark phase offset cancellation, and an adjustable common-mode generator (1.15 V or 2.59 V) which increases output dynamic range. The PGA offers a low-gain range of 167 V/V to 1335 V/V plus a high-gain range of 1002 V/V to 7986 V/V which enables the user to use thermopiles with different sensitivities. The PGA is highlighted by low-gain drift (100 ppm/°C), output offset drift (1.2 mV/°C at G = 1002 V/V), phase delay drift (500 ns) and noise specifications (0.1 µVRMS 0.1 to 10Hz).
The offset cancellation circuitry compensates for the by adding an equal and opposite offset to the input of the second stage, thus removing the original offset from the output signal. This offset cancellation circuitry allows optimized usage of the ADC full scale and relaxes ADC resolution requirements.
The LMP91050 allows extra signal filtering (high-pass, lowpass or bandpass) through dedicated pins A0 and A1, in order to remove out of band noise. The user can program through the on board SPI interface. Available in a small form factor 10-pin package, the LMP91050 operates from 40 to 105°C.
技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | LMP91050 Configurable AFE for Nondispersive Infrared (NDIR) Sensing Applications 数据表 (Rev. E) | PDF | HTML | 2015年 9月 30日 | ||
应用简报 | 采用 A2L 制冷剂:注意事项和要求 | PDF | HTML | 英语版 | PDF | HTML | 2024年 9月 4日 | |
用户指南 | SPIO-4 Precision Signal-Path Controller Board User Guide (Rev. A) | 2018年 5月 5日 | ||||
应用手册 | LMP91051 NDIR CO2 Gas Detection System | 2013年 5月 9日 | ||||
应用手册 | AN-2260 MSP430 Interface to LMP91050 Code Library (Rev. A) | 2013年 5月 1日 | ||||
更多文献资料 | 传感器模拟前端手册 | 2012年 10月 30日 | ||||
EVM 用户指南 | LMP91050 Evaluation Board with Sensor AFE Software User’s Guide | 2012年 3月 22日 |
设计和开发
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LMP91050SDEVAL — 用于 NDIR 应用的传感器 AFE 评估平台
The LMP91050 evaluation board (LMP91050SDEVAL) can be used as stand-alone or as part of Sensor AFE eval platform (refer to the Sensor AFE platform page for software and required hardware). It the LMP91050 can be configured via the SPI interface and allows for testing the device with thermopile (...)
封装 | 引脚 | CAD 符号、封装和 3D 模型 |
---|---|---|
VSSOP (DGS) | 10 | Ultra Librarian |
订购和质量
- RoHS
- REACH
- 器件标识
- 引脚镀层/焊球材料
- MSL 等级/回流焊峰值温度
- MTBF/时基故障估算
- 材料成分
- 鉴定摘要
- 持续可靠性监测
- 制造厂地点
- 封装厂地点
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