TIDA-01596

Smart Thermostat Localized Heat Compensation for Ambient Temperature Sensing Reference Design

Design files

TIDA-01596

Design files

Overview

Localized thermostat heat generation is a leading cause for incorrect ambient temperature sensing near the return air plenum. This ultimately leads to overshoot in the HVAC cycle, resulting in costly energy bills. This reference design addresses this common problem associated with thermostat design. Through the use of a low-cost analog temperature sensor network located on the PCB, the internal thermostat temperature gradient can be found and effectively compensated for in order to acquire the true ambient temperature value.

Features

Current and power monitoring of main power supply
20Ω power resistor used for local heat generation
Two temperature sensor sets for determining the temperature gradient across the board
Low cost SAR ADC used for temperature conversion
Uses CC3220 Launchpad for data processing on real thermostat platforms

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.

Design guide — TIDA-01596

TIDUDO1.PDF (2593 K)

Reference design overview and verified performance test data

Schematic — TIDA-01596

TIDRVK2.PDF (755 K)

Detailed schematic diagram for design layout and components

Bill of materials (BOM) — TIDA-01596

TIDRVK3.PDF (32 K)

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

Assembly drawing — TIDA-01596

TIDRVK4.PDF (122 K)

Detailed overview of design layout for component placement

CAD/CAE symbol — TIDA-01596

TIDRVK6.ZIP (24227 K)

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

Gerber file — TIDA-01596

TIDCEH6.ZIP (1379 K)

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

PCB layout — TIDA-01596

TIDRVK5.PDF (915 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Analog temperature sensors

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

Data sheet: PDF | HTML

Analog temperature sensors

TMP235 — 1C analog temperature sensor, 10 mV/C

Data sheet: PDF | HTML

Digital power monitors

INA230 — 36-V, 16-bit, I²C output current, voltage and power monitor with alert

Data sheet: PDF | HTML

Precision ADCs

ADS7142 — 12-bit 140-kSPS 2-ch nanopower SAR ADC with 1.8-V operation in 1.5-mm x 2-mm QFN package

Data sheet: PDF | HTML

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Software

Firmware

TIDCEH7 — TIDA-01596_Firmware

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TIDCEH7 — TIDA-01596_Firmware

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Latest version

Version: 01.00.00.00

Release date: 01 Feb 2018

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TIDA-01596_Firmware (zip) — 2056 K

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Technical documentation

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	Type	Title		Date
*	Design guide	Smart Thermostat Localized Heat Compensation Reference Design		Feb. 02, 2018

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