Top

Product details

Parameters

Features Transimpedance Amplifier, Temp. Sensor Operating temperature range (C) -40 to 85 Vs (Min) (V) 2.7 Vs (Max) (V) 5.25 Interface type Serial I2C Rating Catalog open-in-new Find other Signal conditioners

Package | Pins | Size

WSON (NHL) 14 16 mm² 4 x 4 open-in-new Find other Signal conditioners

Features

  • 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
open-in-new Find other Signal conditioners

Description

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.

open-in-new Find other Signal conditioners
Download

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 10
Type Title Date
* Datasheet LMP91000 Sensor AFE System: Configurable AFE Potentiostat for Low-Power Chemical-Sensing Applications datasheet (Rev. I) Dec. 31, 2014
User guides SPIO-4 Precision Signal-Path Controller Board User Guide (Rev. A) May 05, 2018
Technical articles SigCon Architect: The keys to your high-speed design Oct. 27, 2015
Technical articles What is the IQ of your home or building? Is it indeed smart? Apr. 20, 2015
Technical articles Make signal conditioning easy with WEBENCH® Interface Designer Jan. 27, 2015
Technical articles Get Connected: Equalization Oct. 15, 2014
User guides Gas Sensor Platform Reference Design Aug. 09, 2013
Application notes AN-2230 MSP430 Interface to LMP91000 Code Library (Rev. C) May 01, 2013
More literature Sensor Analog Front Ends Brochure Oct. 30, 2012
User guides LMP91000EVM User's Guide (Rev. A) Jun. 22, 2012

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
99
Description

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 (...)

Features
  • Supports 3-lead electrochemical cells and 2-lead galvanic cell in potentiostat configuration
  • Includes LMP91000 Gas Sensor AFE and ADC161S626 16-bit converter
EVALUATION BOARDS Download
document-generic User guide
149
Description

The SPIO-4 Digital Controller board is used to read registers, write registers, and capture data from various TI's Sensor AFE and other signal path products. The device evaluation board (for example: LMP90100EB) should be equipped with the GPSI-16 or GPSI-32 header to connect to the SPIO-4 board (...)

Software development

DRIVERS & LIBRARIES Download
SNAC032.ZIP (51 KB)
SUPPORT SOFTWARE Download
SNAC007.ZIP (27314 KB)

Design tools & simulation

SIMULATION MODELS Download
SNAM018.ZIP (32 KB) - PSpice Model

Reference designs

REFERENCE DESIGNS Download
Gas Sensor Platform with Bluetooth Low Energy
TIDA-00056 This reference design is a low-power wireless gas sensor solution that supports a wide array of electrochemical gas sensors. With the versatility of a configurable interface for either Bluetooth® Low Energy, Zigbee RF4CE, 6LoWPAN or ANT this flexible and certified sensor solution is ideal for (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
WSON (NHL) 14 View options

Ordering & quality

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos

Related videos