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.

• 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

• Features
• Current Sources (iDACs), PGA
• Operating temperature range (C)
• -40 to 125
• Vs (Min) (V)
• 1.8
• Interface type
• Serial SPI
• Vs (Max) (V)
• 6
• Rating
• Catalog

LMP91200的完整型号有：LMP91200MT/NOPB、LMP91200MTX/NOPB，以下是这些产品的关键参数及官网采购报价：

LMP91200MT/NOPB，工作温度：-40 to 125，封装：TSSOP (PW)-16，包装数量MPQ：92个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：SN，TI官网LMP91200MT/NOPB的批量USD价格：2.904（1000+）

LMP91200MTX/NOPB，工作温度：-40 to 125，封装：TSSOP (PW)-16，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-3-260C-168 HR，引脚镀层/焊球材料：SN，TI官网LMP91200MTX/NOPB的批量USD价格：2.42（1000+）

LMP91200EVAL — LMP91200 AFE pH sensor evaluation module

The LMP91200 evalboard (LMP91200EVAL) can be used as stand-alone or as part of SensorAFE eval platform (refer to the SensorAFE platform page for software and required hardware). It allows configuring the LMP91200 through a 3-wire SPI interface and testing the device with real PH probe. Moreover the (...)

Associated Files for Application Note MSP430 Interface to LMP91200 Code Library

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 外形尺寸和电气连接与 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 智能、ZigBee 或 (...)