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TIDA-00854

Micropower Electrochemical Gas Sensor Amplifier Reference Design

Design files

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
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

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

download Design guide — TIDA-00854
TIDUC74B.PDF (1135 K)

Reference design overview and verified performance test data

download Schematic — TIDA-00854
TIDRNQ9.PDF (101 K)

Detailed schematic diagram for design layout and components

download Bill of materials (BOM) — TIDA-00854
TIDRNR0.PDF (42 K)

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

download Assembly drawing — TIDA-00854
TIDRNR1.PDF (56 K)

Detailed overview of design layout for component placement

download CAD/CAE symbol — TIDA-00854
TIDRNR3.ZIP (622 K)

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

download Gerber file — TIDA-00854
TIDCCO5.ZIP (209 K)

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

download PCB layout — TIDA-00854
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

LPV802 — Dual, 5.5-V, 8-kHz, ultra low quiescent current (320-nA), 1.6-V min supply, RRO op amp

Data sheet: PDF | HTML
Humidity sensors

HDC1080 — 2% RH low-power digital relative humidity sensor

Data sheet: PDF | HTML

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Software

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
Technical article How to improve IoT designs with a nanopower EMI-tolerant op amp PDF | HTML Nov. 09, 2016

Related design resources

Hardware development

DEVELOPMENT KIT
MSP-EXP430FR6989 — MSP430FR6989 LaunchPad™ development kit

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