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.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | LMP91200 Configurable AFE for Low Power Chemical Sensing Apps datasheet (Rev. E) | 2016/2/29 | |||
| 技術文章 | What can we learn for IIoT from the man who invented the Web? | PDF | HTML | 2016/1/12 | |||
| 應用說明 | AN-2254 MSP430 Interface to LMP91200 Code Library (Rev. A) | 2013/5/1 | ||||
| 更多文件說明 | Sensor Analog Front Ends Brochure | 2012/10/30 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
SNAC044 — Associated Files for Application Note MSP430 Interface to LMP91200 Code Library
TIDA-00561 — 無線 pH 感測器發射器 (適用於 SensorTag 的 DevPack) 參考設計
TIDA-00561 展示如何打造用於製程控制的工業級無線 pH 發射器。此參考設計包括一個設計的 pH 前端，可透過其板載連接器直接連接到製程控制中使用的大多數 pH 探針。性能數據經過測試和特徵分析（輸入範圍 0 至 14 pH，整體測試精度 +/- 0.01 pH），以確保與製程儀器需求相容。
由於 TIDA-00561 的外形尺寸和電氣連線與 TI SimpleLink™ CC2650 SensorTag 生態系統相容，因此只需進行簡單的韌體更新即可選擇無線連線技術：Bluetooth® Smart、ZigBee® 或 6LoWPAN 等。用於測試和特性分析的韌體是 Bluetooth (...)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| TSSOP (PW) | 16 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。