TIDA-01070

HVAC Coil Airflow Sensor Reference Design for Predictive Maintenance in Air Filter Replacement

TIDA-01070

Design files

Overview

This design provides a reference for monitoring airflow efficiency and temperature through heat ventilation and air conditioner (HVAC) systems. The reference design is used in conjunction with solid state relays and piezoelectric vibration sensors to monitor and react accordingly to low airflow and low temperature conditions through the air handler. The system also includes a calibration algorithm for consistent performance across all system setups.

Features

Low temperature condenser cutoff
One button system calibration
Designed to work with air handler 24 VAC transformer
14.08 mA current consumption when running
Operating conditions: -40°C to 85°C

Industrial

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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.

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Design guide — TIDA-01070

TIDUCA6A.PDF (9826 K)

Reference design overview and verified performance test data

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Schematic — TIDA-01070

TIDRNO4.PDF (1950 K)

Detailed schematic diagram for design layout and components

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Bill of materials (BOM) — TIDA-01070

TIDRNO5.PDF (67 K)

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

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Assembly drawing — TIDA-01070

TIDRNO6.PDF (428 K)

Detailed overview of design layout for component placement

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CAD/CAE symbol — TIDA-01070

TIDRNO8.ZIP (2121 K)

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

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Gerber file — TIDA-01070

TIDCCN9.ZIP (628 K)

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

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PCB layout — TIDA-01070

TIDRNO7.PDF (2425 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

MSP430 microcontrollers

MSP430FR2311 — 16-MHz integrated analog microcontroller with 3.75-KB FRAM, OpAmp, TIA, comparator w/DAC, 10-bit ADC

Data sheet: PDF | HTML

Analog temperature sensors

LMT84 — 1.5V-Capable, 10 uA Analog Output Temperature Sensor in SC70 and TO-92

Data sheet: PDF | HTML

Buck converters (integrated switch)

TPS5401 — 3.5V to 42V Input, 0.5 A Step Down Converter

Data sheet: PDF | HTML

ESD & surge protection ICs

TPD1E10B06 — 12-pF, ±5.5V, ±30-kV ESD protection diode in 0402 and SOD-523 package

Data sheet: PDF | HTML

General-purpose op amps

TLV4313 — Quad, 5.5-V, 1-MHz, low quiescent current (65-μA), RRIO operational amplifier

Data sheet: PDF | HTML

Linear & low-dropout (LDO) regulators

LP2985-N — 150-mA, 16-V, low-dropout voltage regulator with enable

Data sheet: PDF | HTML

NOR gates

SN74LVC1G27 — Single 3-input, 1.65-V to 5.5-V NOR gate

Data sheet: PDF

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Software

Firmware

TIDCCN8 — TIDA-01070 Firmware

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TIDCCN8 — TIDA-01070 Firmware

Latest version

Version: 01.00.00.00

Release date: 28 Sep 2016

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TIDA-01070 Firmware (zip) — 3939 K

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Technical documentation

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	Type	Title	Date
*	Design guide	HVAC Coil Airflow Sensor for Predictive Maintenance in Air Filter Replacement (Rev. A)	Oct. 25, 2016
	Technical article	Predictive maintenance solutions for HVAC filter replacement – part 2	Dec. 08, 2016
	Technical article	Predictive maintenance solutions for HVAC filter replacement – part 1	Nov. 14, 2016
	White paper	Making factories smarter, more productive through predictive maintenance	Nov. 02, 2016
	Technical article	Trends in building automation: predictive maintenance	Nov. 01, 2016

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