Driver or library
Data sheet
LMP91002
- 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.
Technical documentation
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View all 5 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LMP91002 Sensor AFE System: Configurable AFE Potentiostat for Low-Power Chemical Sensing Applications datasheet (Rev. B) | PDF | HTML | 29 Oct 2015 |
| User guide | SPIO-4 Precision Signal-Path Controller Board User Guide (Rev. A) | 05 May 2018 | ||
| Application note | AN-2230 MSP430 Interface to LMP91000 Code Library (Rev. C) | 01 May 2013 | ||
| More literature | Sensor Analog Front Ends Brochure | 30 Oct 2012 | ||
| EVM User's guide | LMP91000EVM User's Guide (Rev. A) | 22 Jun 2012 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
LMP91000EVM — LMP91000 evaluation module
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, (...)
User guide: PDF
Support software
LMP9XXXXSENSORDEV-SW — LMP91000 Sensor AFE Software Download
National's configurable Sensor AFE ICs and WEBENCH® Sensor AFE Designer are part of an integrated hardware and software development platform to simplify sensor system design by enabling the engineer to select a sensor, design and configure the solution, and download configuration in minutes. (...)
Supported products & hardware
Products
Signal conditioners
Precision ADCs
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| WSON (NHL) | 14 | Ultra Librarian |
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