HVAC Coil Airflow Sensor Reference Design for Predictive Maintenance in Air Filter Replacement
TIDA-01070
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Key Document
Description
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
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Schematic/Block Diagram
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Design Guide
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TI Devices (7)
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| Sample & Buy |
Design Kits & Evaluation Modules |
| LMT84 |
1.5V-Capable, 10 uA Analog Output Temperature Sensor in SC70 and TO-92 |
Temperature sensors |
Sample & Buy |
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| LP2985-N |
150-mA, 16-V, low-dropout voltage regulator with enable |
Power management |
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| MSP430FR2311 |
16MHz integrated analog microcontroller with 3.75KB FRAM, Op-Amp, TIA, Comparator w/ DAC, 10-bit ADC |
Microcontrollers (MCU) |
Sample & Buy |
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| SN74LVC1G27 |
Single 3-Input Positive-NOR Gate |
Gate |
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| TLV4313 |
4-Channel, 1MHz, RRIO, low power, cost-optimized 5.5V CMOS op amp |
Operational amplifiers (op amps) |
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| TPD1E10B06 |
Single-channel ESD in 0402 package with 10pF capacitance and 6-V breakdown |
Circuit protection ICs |
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| TPS5401 |
3.5V to 42V Input, 0.5 A Step Down Converter |
Step-down (buck) regulators |
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CAD/CAE symbols
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Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.
Step 1: Download and install the free download.
Step 2: Download the Symbol and Footprint from the CAD.bxl file table.
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Technical documentation
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User guide (1)
| Title | Type | Size (KB) | Date |
| | PDF | 9826 |
25 Oct 2016
|
White paper (1)
| Title | Type | Size (KB) | Date |
| | PDF | 1774 |
02 Nov 2016
|
Design files (6)
| | ZIP | 628 |
29 Sep 2016
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| | ZIP | 2121 |
29 Sep 2016
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| | PDF | 2425 |
29 Sep 2016
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| | PDF | 428 |
29 Sep 2016
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| | PDF | 67 |
29 Sep 2016
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| | PDF | 1950 |
29 Sep 2016
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More literature (1)
| Title | Type | Size (KB) | Date |
| | ZIP | 3939 |
29 Sep 2016
|
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