製品の詳細

Features Transimpedance Amplifier, Temp. Sensor Operating temperature range (C) -40 to 85 Vs (Min) (V) 2.7 Interface type Serial I2C Vs (Max) (V) 5.25 Rating Catalog
Features Transimpedance Amplifier, Temp. Sensor Operating temperature range (C) -40 to 85 Vs (Min) (V) 2.7 Interface type Serial I2C Vs (Max) (V) 5.25 Rating Catalog
WSON (NHL) 14 16 mm² 4 x 4
  • Typical Values, TA = 25°C
  • Supply Voltage 2.7 V to 5.25 V
  • Supply Current (Average Over Time) <10 µA
  • Cell Conditioning Current Up to 10 mA
  • Reference Electrode Bias Current (85°C) 900pA (max)
  • Output Drive Current 750 µA
  • Complete Potentiostat Circuit-to-Interface to Most
    Chemical Cells
  • Programmable Cell Bias Voltage
  • Low-Bias Voltage Drift
  • Programmable TIA gain 2.75 kΩ to 350 kΩ
  • Sink and Source Capability
  • 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 5.25 V
  • Supply Current (Average Over Time) <10 µA
  • Cell Conditioning Current Up to 10 mA
  • Reference Electrode Bias Current (85°C) 900pA (max)
  • Output Drive Current 750 µA
  • Complete Potentiostat Circuit-to-Interface to Most
    Chemical Cells
  • Programmable Cell Bias Voltage
  • Low-Bias Voltage Drift
  • Programmable TIA gain 2.75 kΩ to 350 kΩ
  • Sink and Source Capability
  • I2C Compatible Digital Interface
  • Ambient Operating Temperature –40°C to 85°C
  • Package 14-Pin WSON
  • Supported by WEBENCH® Sensor AFE Designer

The LMP91000 is a programmable analog front-end (AFE) for use in micro-power electrochemical sensing applications. It provides a complete signal path solution between a sensor and a microcontroller that generates an output voltage proportional to the cell current. The LMP91000’s programmability enables it to support multiple electrochemical sensors such as 3-lead toxic gas sensors and 2-lead galvanic cell sensors with a single design as opposed to the multiple discrete solutions. The LMP91000 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 LMP91000’s adjustable cell bias and transimpedance amplifier (TIA) gain are programmable through the I2C interface. The I2C interface can also be used for sensor diagnostics. An integrated temperature sensor can be read by the user through the VOUT pin and used to provide additional signal correction in the µC or monitored to verify temperature conditions at the sensor.

The LMP91000 is optimized for micro-power applications and operates over a voltage range of 2.7 to 5.25 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 LMP91000 is a programmable analog front-end (AFE) for use in micro-power electrochemical sensing applications. It provides a complete signal path solution between a sensor and a microcontroller that generates an output voltage proportional to the cell current. The LMP91000’s programmability enables it to support multiple electrochemical sensors such as 3-lead toxic gas sensors and 2-lead galvanic cell sensors with a single design as opposed to the multiple discrete solutions. The LMP91000 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 LMP91000’s adjustable cell bias and transimpedance amplifier (TIA) gain are programmable through the I2C interface. The I2C interface can also be used for sensor diagnostics. An integrated temperature sensor can be read by the user through the VOUT pin and used to provide additional signal correction in the µC or monitored to verify temperature conditions at the sensor.

The LMP91000 is optimized for micro-power applications and operates over a voltage range of 2.7 to 5.25 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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技術資料

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種類 タイトル 英語版のダウンロード 日付
* データシート LMP91000 Sensor AFE System: Configurable AFE Potentiostat for Low-Power Chemical-Sensing Applications データシート (Rev. I) 2014年 12月 31日
技術記事 What is the IQ of your home or building? Is it indeed smart? 2015年 4月 20日
技術記事 Get Connected: A new blog series 2014年 1月 10日
アプリケーション・ノート AN-2230 MSP430 Interface to LMP91000 Code Library (Rev. C) 2013年 5月 1日
その他の技術資料 Sensor Analog Front Ends Brochure 2012年 10月 30日

設計と開発

追加の事項や他のリソースを参照するには、以下のタイトルをクリックすると、詳細ページを表示できます。

評価ボード

LMP91000EVM — LMP91000 評価基板

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, (...)

在庫あり
制限: 3
ドライバまたはライブラリ

MSP430 Interface to LMP91000 and LMP91002 Code Library

SNAC032.ZIP (51 KB)
サポート・ソフトウェア

LMP91000 Sensor AFE Software Download

SNAC007.ZIP (27314 KB)
シミュレーション・モデル

LMP91000 PSPICE Model

SNAM018.ZIP (32 KB) - PSpice Model
パッケージ ピン数 ダウンロード
WSON (NHL) 14 オプションの表示

購入と品質

含まれる情報:
  • RoHS
  • REACH
  • デバイスのマーキング
  • リード端子の仕上げ / ボールの原材料
  • MSL rating/ リフローピーク温度
  • MTBF/FIT の推定値
  • 原材料組成
  • 認定試験結果
  • 継続的な信頼性モニタ試験結果

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