TIDA-01070
HVAC Coil Airflow Sensor Reference Design for Predictive Maintenance in Air Filter Replacement
TIDA-01070
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
Design files & products
Design files
Download ready-to-use system files to speed your design process.
TIDUCA6A.PDF (9826 K)
Reference design overview and verified performance test data
TIDRNO4.PDF (1950 K)
Detailed schematic diagram for design layout and components
TIDRNO5.PDF (67 K)
Complete listing of design components, reference designators, and manufacturers/part numbers
TIDRNO6.PDF (428 K)
Detailed overview of design layout for component placement
TIDRNO8.ZIP (2121 K)
Files used for 3D models or 2D drawings of IC components
TIDCCN9.ZIP (628 K)
Design file that contains information on physical board layer of design PCB
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 AD
Data sheetAnalog temperature sensors
LMT84 — 1.5V-Capable, 10 uA Analog Output Temperature Sensor in SC70 and TO-92
Data sheetBuck converters (integrated switch)
TPS5401 — 3.5V to 42V Input, 0.5 A Step Down Converter
Data sheetESD & surge protection ICs
TPD1E10B06 — 12-pF, ±5.5V, ±30-kV ESD protection diode in 0402 and SOD-523 package
Data sheetGeneral-purpose op amps
TLV4313 — Quad, 5.5-V, 1-MHz, low quiescent current (65-μA), RRIO operational amplifier
Data sheetLinear & low-dropout (LDO) regulators
LP2985-N — 150-mA, 16-V, low-dropout voltage regulator with enable
Data sheetStart development
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 | |
| More literature | TIDA-01070 Firmware | Sep. 29, 2016 |
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