LMP91200
- Active Guarding
- Key Specifications
Unless otherwise noted, typical values at
TA = 25°C, VS = (VDD-GND) = 3.3 V - pH Buffer Input Bias Current (0 < VINP < 3.3 V)
- Maximum at 25°C: ±125 fA
- Maximum at 85°C: ±445 fA
- pH Buffer Input Bias Current
(–500 mV < VINP– VCM < 500 mV),
VS = (VDD – GND) = 0 V- Maximum at 25°C: ±600 fA
- Maximum at 85°C: ±6.5 pA
- pH Buffer Input Offset Voltage: ±200 µV
- pH Buffer Input Offset Voltage Drift: ±2.5 µV/°C
- Supply Current: 50 µA
- Supply Voltage: 1.8 V to 5.5 V
- Operating Temperature Range: –40°C to 125°C
- Package: 16-Pin TSSOP
The LMP91200 device is a sensor AFE for use in low-power, analytical-sensing applications. The LMP91200 is designed for 2-electrode sensors. This device provides all of the functionality needed to detect changes based on a delta voltage at the sensor. Optimized for low-power applications, the LMP91200 works over a voltage range of 1.8 V to 5.5 V. With its extremely low input bias current it is optimized for use with pH sensors. Also, in absence of supply voltage the very low input bias current reduces degradation of the pH probe when connected to the LMP91200. Two guard pins provide support for high parasitic impedance wiring. Depending on the configuration, total current consumption for the device is 50 µA while measuring pH. Available in a 16-pin TSSOP package, the LMP91200 operates from –40°C to +125°C.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | LMP91200 Configurable AFE for Low Power Chemical Sensing Apps 数据表 (Rev. E) | 2016-2-29 | |||
| 技术文章 | What can we learn for IIoT from the man who invented the Web? | PDF | HTML | 2016-1-12 | |||
| 应用手册 | AN-2254 MSP430 Interface to LMP91200 Code Library (Rev. A) | 2013-5-1 | ||||
| 更多文献资料 | 传感器模拟前端手册 | 2012-10-30 |
设计与开发
如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。
SNAC044 — Associated Files for Application Note MSP430 Interface to LMP91200 Code Library
TIDA-00561 — 无线 pH 传感器发送器（用于 SensorTag 的 DevPack）参考设计
TIDA-00561 展示了如何构建用于过程控制的工业级无线 pH 变送器。该参考设计包括一个精心设计的 pH 前端，可通过其板载连接器直接连接到过程控制中使用的大多数 pH 探针。性能数据经过测试和表征（输入范围 0 至 14pH，整体测试精度 +/- 0.01pH），可确保满足过程仪表的需求。
由于 TIDA-00561 外形规格和电气连接与 TI SimpleLink™ CC2650 SensorTag 生态系统兼容，因此只需进行简单的固件更新，即可选择无线连接技术：Bluetooth® Smart、ZigBee® 或 6LoWPAN (...)
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| TSSOP (PW) | 16 | Ultra Librarian |
订购和质量
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