Produktdetails

Number of input channels 1 Features Transimpedance Amplifier Operating temperature range (°C) -40 to 85 Vs (min) (V) 2.7 Vs (max) (V) 3.6 Interface type Serial I2C Rating Catalog
Number of input channels 1 Features Transimpedance Amplifier Operating temperature range (°C) -40 to 85 Vs (min) (V) 2.7 Vs (max) (V) 3.6 Interface type Serial I2C Rating Catalog
WSON (NHL) 14 16 mm² 4 x 4
  • Typical Values, TA = 25°C
  • Supply Voltage 2.7 V to 3.6 V
  • Supply Current (Average Over Time) < 10 µA
  • Cell Conditioning Current Up to 10 mA
  • Reference Electrode Bias Current (85°C) 900-pA
    (Maximum)
  • Output Drive Current 750 µA
  • Complete Potentiostat Circuit to Interface to Most
    Not Biased Gas Sensors
  • Low Bias Voltage Drift
  • Programmable TIA Gain 2.75 kΩ to 350 kΩ
  • I2C-Compatible Digital Interface
  • Ambient Operating Temperature –40°C to 85°C
  • Package 14-pin WSON
  • Supported by Webench Sensor AFE Designer
  • Typical Values, TA = 25°C
  • Supply Voltage 2.7 V to 3.6 V
  • Supply Current (Average Over Time) < 10 µA
  • Cell Conditioning Current Up to 10 mA
  • Reference Electrode Bias Current (85°C) 900-pA
    (Maximum)
  • Output Drive Current 750 µA
  • Complete Potentiostat Circuit to Interface to Most
    Not Biased Gas Sensors
  • Low Bias Voltage Drift
  • Programmable TIA Gain 2.75 kΩ to 350 kΩ
  • I2C-Compatible Digital Interface
  • Ambient Operating Temperature –40°C to 85°C
  • Package 14-pin WSON
  • Supported by Webench Sensor AFE Designer

The LMP91002 device is a programmable Analog Front End (AFE) for use in micro-power electrochemical-sensing applications. It provides a complete signal path solution between a not biased gas sensor and a microcontroller generating an output voltage proportional to the cell current.

The LMP91002’s programmability enables it support not biased electro-chemical gas sensor with a single design. The LMP91002 supports gas sensitivities over a range of 0.5 nA/ppm to 9500 nA/ppm. It also allows for an easy conversion of current ranges from 5 µA to 750 µA full scale. The LMP91002’s transimpedance amplifier (TIA) gain is programmable through the I2C interface. The I2C interface can also be used for sensor diagnostics. The LMP91002 is optimized for micro-power applications and operates over a voltage range of 2.7 V to 3.6 V. The total current consumption can be less than 10 µA. Further power savings are possible by switching off the TIA amplifier and shorting the reference electrode to the working electrode with an internal switch.

The LMP91002 device is a programmable Analog Front End (AFE) for use in micro-power electrochemical-sensing applications. It provides a complete signal path solution between a not biased gas sensor and a microcontroller generating an output voltage proportional to the cell current.

The LMP91002’s programmability enables it support not biased electro-chemical gas sensor with a single design. The LMP91002 supports gas sensitivities over a range of 0.5 nA/ppm to 9500 nA/ppm. It also allows for an easy conversion of current ranges from 5 µA to 750 µA full scale. The LMP91002’s transimpedance amplifier (TIA) gain is programmable through the I2C interface. The I2C interface can also be used for sensor diagnostics. The LMP91002 is optimized for micro-power applications and operates over a voltage range of 2.7 V to 3.6 V. The total current consumption can be less than 10 µA. Further power savings are possible by switching off the TIA amplifier and shorting the reference electrode to the working electrode with an internal switch.

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Technische Dokumentation

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Typ Titel Datum
* Data sheet LMP91002 Sensor AFE System: Configurable AFE Potentiostat for Low-Power Chemical Sensing Applications datasheet (Rev. B) PDF | HTML 29 Okt 2015
User guide SPIO-4 Precision Signal-Path Controller Board User Guide (Rev. A) 05 Mai 2018
Application note AN-2230 MSP430 Interface to LMP91000 Code Library (Rev. C) 01 Mai 2013
More literature Sensor Analog Front Ends Brochure 30 Okt 2012
EVM User's guide LMP91000EVM User's Guide (Rev. A) 22 Jun 2012

Design und Entwicklung

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Evaluierungsplatine

LMP91000EVM — LMP91000-Evaluierungsmodul

The Texas Instruments LMP91000EVM evaluation module (EVM) helps designers evaluate the operation and performance of the LMP91000 Sensor Analog Front End for Electrochemical sensor. The LMP91000EVM is part of the Sensor AFE evaluation platform.

The SPIO4 communication board is a data capture board, (...)

Benutzerhandbuch: PDF
Treiber oder Bibliothek

SNAC032 MSP430 Interface to LMP91000 and LMP91002 Code Library

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Simulationsmodell

LMP91002 PSpice Model

SNIM001.ZIP (33 KB) - PSpice Model
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WSON (NHL) 14 Optionen anzeigen

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