LMP91000SDX/NOPB Analog Front End AFE Configurable AFE Potentiostat

Short Description:

Manufacturers: Texas Instruments
Product Category: Data Acquisition – Analog Front End (AFE)
Data Sheet: LMP91000SDX/NOPB
Description: IC AFE 1 CHAN 8BIT 14WSON
RoHS status: RoHS Compliant


Product Detail

Features

applications

Product Tags

♠ Product Description

Product Attribute Attribute Value
Manufacturer: Texas Instruments
Product Category: Analog Front End - AFE
RoHS:  Details
Series: LMP91000
Type: Potentiostat AFE
Minimum Operating Temperature: - 40 C
Maximum Operating Temperature: + 85 C
Package / Case: WSON-14
Packaging: Reel
Analog Supply Voltage: 2.7 V to 5.25 V
Brand: Texas Instruments
Features: Transimpedance Amplifier, Temp. Sensor
Moisture Sensitive: Yes
Product Type: Analog Front End - AFE
Factory Pack Quantity: 4500
Subcategory: Data Converter ICs

♠ LMP91000 Sensor AFE System: Configurable AFE Potentiostat for Low-Power ChemicalSensing Applications

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 I 2C interface. The I 2C 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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  • • 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 10mA

    • 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

    • Chemical Species Identification

    • Amperometric Applications

    • Electrochemical Blood Glucose Meter

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