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LMP91200

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Integriertes AFE für energieeffiziente pH-Sensoranwendungen

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Datenblatt

LMP91200

AKTIV
Datenblatt Jetzt bestellen

Produktdetails

Number of input channels 1 Features Current Sources (iDACs), PGA Operating temperature range (°C) -40 to 125 Vs (min) (V) 1.8 Vs (max) (V) 6 Interface type Serial SPI Rating Catalog
Number of input channels 1 Features Current Sources (iDACs), PGA Operating temperature range (°C) -40 to 125 Vs (min) (V) 1.8 Vs (max) (V) 6 Interface type Serial SPI Rating Catalog
TSSOP (PW) 16 32 mm² 5 x 6.4
  • 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
  • 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.

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.
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Technische Dokumentation

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Typ Titel Datum
* Data sheet LMP91200 Configurable AFE for Low Power Chemical Sensing Apps datasheet (Rev. E) 29 Feb 2016
Technical article What can we learn for IIoT from the man who invented the Web? PDF | HTML 12 Jan 2016
Application note AN-2254 MSP430 Interface to LMP91200 Code Library (Rev. A) 01 Mai 2013
More literature Sensor Analog Front Ends Brochure 30 Okt 2012
EVM User's guide LMP91200 Sensor AFE Evaluation Board User's Guide (Rev. A) 30 Mai 2012
EVM User's guide LMP91200 Sensor AFE Evaluation Board User's Guide 07 Mai 2012

Design und Entwicklung

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Treiber oder Bibliothek

SNAC044 — Associated Files for Application Note MSP430 Interface to LMP91200 Code Library

Unterstützte Produkte und Hardware

Unterstützte Produkte und Hardware

Produkte
Signalumformer
LMP91200 — Integriertes AFE für energieeffiziente pH-Sensoranwendungen
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Simulationsmodell

LMP91200 PSpice Transient Model (Rev. A)

SNAM129A.ZIP (25 KB) - PSpice Model
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Simulationsmodell

LMP91200 TINA-TI Reference Design

SNAM130.TSC (395 KB) - TINA-TI Reference Design
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Simulationsmodell

LMP91200 TINA-TI Transient Spice Model (Rev. A)

SNAM131A.ZIP (54 KB) - TINA-TI Spice Model
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Referenzdesigns

TIDA-00561 — Drahtloser pH-Sensor-Transmitter (DevPack für SensorTag) – Referenzdesign

TIDA-00561 shows how to build an industrial-grade wireless pH transmitter for process control. This reference design includes a designed pH front-end which can be connected directly via its onboard connector to most pH probes used in process control. The performance data was tested and (...)
Design guide: PDF
Schaltplan: PDF
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TSSOP (PW) 16 Optionen anzeigen
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