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TIDA-01465

Capacitive Frost or Ice Detection Reference Design, Resolution of <1mm, Temperature Drift <0.25%

Design files

TIDA-01465

Design files

Overview

Frost and ice buildup on cooling bodies and evaporators can significantly decrease system energy efficiency in many appliance applications such as refrigerators, air conditioners, and freezers. This sensor reference design helps to achieve the more stringent energy efficiency requirements of modern appliances through reducing the number of unnecessary defrost cycles by sensing the amount of ice buildup (resolution of < 1mm) on enclosures and metal surfaces of cooling bodies to trigger defrost cycles only when necessary, versus the traditional defrost trigger method of using a timer or temperature sensor.

Features
  • Resolution of < 1mm, temperature drift < 0.25%
  • Reduce energy by minimizing defrost cycle of melting ice or frost on evaporator coils to eliminate unnecessary defrost cycles
  • Fit for universal application in all types of refrigeration equipment with great sensitivity, high reliability, and low cost
  • Accurately sense thickness of ice or frost accumulated on surface of evaporating coils of refrigeration equipment
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Design files & products

Design files

Download ready-to-use system files to speed your design process.

download Design guide — TIDA-01465
TIDUD79.PDF (10999 KB)

Reference design overview and verified performance test data

download Assembly drawing — TIDA-01465
TIDRSJ0.PDF (185 KB)

Detailed overview of design layout for component placement

download Bill of materials (BOM) — TIDA-01465
TIDRSI9.PDF (34 KB)

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

download CAD/CAE symbol — TIDA-01465
TIDRSJ2.ZIP (1009 KB)

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

download Gerber file — TIDA-01465
TIDCDS9A.ZIP (2141 KB)

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

download PCB layout — TIDA-01465
TIDRSJ1.PDF (672 KB)

PCB layer plot file used for generating PCB design layout

download Schematic — TIDA-01465
TIDRSI8.PDF (253 KB)

Detailed schematic diagram for design layout and components

Products

Includes TI products in the design and potential alternatives.

Linear & low-dropout (LDO) regulators

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

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Low-power MCUs

MSP430F5528 — 25 MHz MCU with 128KB Flash, 8KB SRAM, 12-bit ADC, comparator, DMA, UART/SPI/I2C, USB, HW multiplier

Data sheet: PDF | HTML
Signal conditioners

FDC2214 — 4-Ch, 28-bit, capacitance to digital converter

Data sheet: PDF | HTML

Start development

Hardware development

Evaluation board

FDC2214EVM — FDC2214 with Two Capacitive Sensors Evaluation Module

Frost and ice buildup on cooling bodies and evaporators can significantly decrease system energy efficiency in many appliance applications such as refrigerators, air conditioners, and freezers. This sensor reference design helps to achieve the more stringent energy efficiency requirements of (...)
EVM user’s guide: PDF | HTML
Supported products & hardware

Supported products & hardware

Hardware development
Reference design
TIDA-00464 — High Temperature Touch through Glass Reference Design TIDA-01465 — Capacitive Frost or Ice Detection Reference Design, Resolution of <1mm, Temperature Drift <0.25%
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FDC2214EVM — FDC2214 with Two Capacitive Sensors Evaluation Module

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Hardware development
Reference design
TIDA-00464 — High Temperature Touch through Glass Reference Design TIDA-01465 — Capacitive Frost or Ice Detection Reference Design, Resolution of <1mm, Temperature Drift <0.25%
TI’s Standard Terms and Conditions for Evaluation Items apply.

Technical documentation

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Top documentation Type Title Format options Date
* Design guide Capacitive Frost or Ice Detection Reference Design—Resolution of < 1 mm Aug 9, 2017
Technical article Accurate frost or ice detection based on capacitive sensing PDF | HTML Mar 1, 2018

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