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 (9)
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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 |
Micropower 150mA Low-Noise Ultra-Low-Dropout Regulator |
Power management |
Sample & Buy |
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| MSP430FR2311 |
16 MHz Ultra-Low-Power Microcontroller - 4 KB FRAM, 1 KB SRAM, 16 IO, 8ch 10-bit ADC, OpAmp, TIA |
Microcontrollers (MCU) |
Sample & Buy |
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| SN74LVC1G27 |
Single 3-Input Positive-NOR Gate |
Gate |
Sample & Buy |
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| TLV2313 |
Low-Power, RRIO, 750-uV Offset, 1-MHz Operational Amplifier for Cost-Sensitive Systems |
Operational amplifiers (op amps) |
Sample & Buy |
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| TLV313 |
Low-Power, RRIO, 750-uV Offset, 1-MHz Operational Amplifier for Cost-Sensitive Systems |
Operational amplifiers (op amps) |
Sample & Buy |
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| TLV4313 |
Low-Power, RRIO, 750-uV Offset, 1-MHz Operational Amplifier for Cost-Sensitive Systems |
Operational amplifiers (op amps) |
Sample & Buy |
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| TPD1E10B06 |
Single-channel ESD in 0402 package with 10pF capacitance and 6V breakdown |
Circuit protection |
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| TPS5401 |
3.5V to 42V Input, 0.5 A Step Down Converter |
Step-down (buck) |
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CAD/CAE symbols
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Step 2: Download the Symbol and Footprint from the CAD.bxl file table.
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.
Step 3: Open the .bxl file with the Ultra Librarian software.
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Both PCB footprints and schematic symbols are available for download in a vendor neutral format, which can then be exported to the leading EDA CAD/CAE design tools using the Ultra Librarian Reader. The reader is available as a (free download.).
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Technical Documents
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User guides (1)
| Title | Type | Size (KB) | Date |
| | PDF | 9826 |
25 Oct 2016
|
White papers (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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