TIDA-00854

Micropower Electrochemical Gas Sensor Amplifier Reference Design

TIDA-00854

Design files

Overview

This reference design consists of a micropower “Potentistat” type electrochemical sensor circuit for battery operated portable or long-life portable or fixed remote location devices. Using a nanopower amplifier and reference circuit allows the circuit to function continuously and independently of the monitoring processor to keep the sensor biased to avoid lengthy start-up settling times.

Features
  •  Potentiometric type amplifier adaptable for many electrochemical cell applications
  •  Accommodates biased and unbiased sensors
  •  Adaptable to many two and three terminal electrochemical cell applications
  •  Micropower (<1uA) total amplifier circuit supply current for long battery life
  •  Booster-Pack compatible PCB format for use with MSP430 LaunchPad development platform

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUC74B.PDF (1135 K)

Reference design overview and verified performance test data

TIDRNQ9.PDF (101 K)

Detailed schematic diagram for design layout and components

TIDRNR0.PDF (42 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRNR1.PDF (56 K)

Detailed overview of design layout for component placement

TIDRNR3.ZIP (622 K)

Files used for 3D models or 2D drawings of IC components

TIDCCO5.ZIP (209 K)

Design file that contains information on physical board layer of design PCB

TIDRNR2.PDF (269 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

General-purpose op amps

LPV802Dual, 5.5-V, 8-kHz, ultra low quiescent current (320-nA), 1.6-V min supply, RRO op amp

Data sheet document-pdfAcrobat PDF open-in-new HTML
Humidity sensors

HDC10802% RH low-power digital relative humidity sensor

Data sheet document-pdfAcrobat PDF open-in-new HTML
Shunt voltage references

REF11121-µA, 3-pin SOT-23 10-ppm/°C shunt voltage reference

Data sheet document-pdfAcrobat PDF open-in-new HTML

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Software

Firmware

TIDA-00854_Firmware – TIDCCO6.ZIP (1314 K)

Technical documentation

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Type Title Date
* Design guide Micropower Electrochemical Gas Sensor Amplifier Reference Design (Rev. B) Nov. 13, 2017
Technical article How to improve IoT designs with a nanopower EMI-tolerant op amp Nov. 09, 2016
More literature TIDA-00854_Firmware Sep. 29, 2016

Related design resources

Hardware development

DEVELOPMENT KIT
MSP-EXP430FR6989 MSP430FR6989 LaunchPad Development Kit

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