TIDA-00811

Accurate Temperature, Light Sensing, and Diagnostics Reference Design for Smart Grid Applications

TIDA-00811

Design files

Overview

This reference design provides accurate measurements of ambient light intensity used to detect arc flash faults with a fast response of 1 ms, protecting or minimizing damages to power distribution switchgear. This design also monitors temperature (using switch, analog, digital or remote ), humidity, dust, and pressure accurately for online monitoring of busbar, transformers, and capacitor banks for early indication of faults, insulation failures, or ageing, resulting in increased operational life. This design provides a unique diagnostics approach within 1 ms during low load current for diagnostics of an ambient light sensor (ALS), increasing the system reliability. The sensors can be interfaced to microcontrollers with I2C or a low-power, wireless interface to perform weather transmitter functions for continuous online monitoring to simplify the system design.

Features
  • Measures light, temperature, humidity, dust, vibration and pressure with support for multiple types of temperature and ambient light sensors
  • Measures arc flash light using analog output ambient light sensor for fast response of <1 ms
  • Uses 10-bit SAR ADC with I2C interface and alert output to measure output of ALS
  • Deisgn uses hardware comparator for fast fault response to ambient light changes.  Threshold can be set using 10-bit DAC or digital potentiometer
  • Measures remote temperature using daisy-chain UART interface, alert output, and capability to daisy chain or multiplex sensors
  • Supports accurate diagnostics of ambient light and temperature sensor with diagnostics time of ~1ms allowing online diagnostics

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.

TIDUD63.PDF (663 K)

Reference design overview and verified performance test data

TIDRSN4.ZIP (843 K)

Detailed schematic diagram for design layout and components

TIDRSN5.ZIP (233 K)

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

TIDRSN6.ZIP (345 K)

Detailed overview of design layout for component placement

TIDRSN8.ZIP (4061 K)

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

TIDCDU1.ZIP (1433 K)

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

TIDRSN7.ZIP (1991 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Ambient light sensors

OPT101Monolithic Photodiode and Single-Supply Transimpedance Amplifier

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Ambient light sensors

OPT3001Digital ambient light sensor (ALS) with high-precision human-eye response

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Ambient light sensors

OPT3002Light-to-digital sensor

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Ambient light sensors

OPT3006Ultra-thin ambient light sensor (ALS)

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Analog switches & muxes

SN74LVC1G31575-V, 2:1 (SPDT), 1-channel general-purpose analog switch

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Analog temperature sensors

LM351C high voltage analog temperature sensor, 10 mV/C

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Analog temperature sensors

LMT87±2°C 2.7V to 5.5V analog output temperature sensor with -13.6 mV/°C gain

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Bluetooth products

CC2650SimpleLink™ 32-bit Arm Cortex-M3 multiprotocol 2.4 GHz wireless MCU with 128kB Flash

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Comparators

LMV331Single General Purpose Low-Voltage Comparator

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Digital potentiometers (digipots)

TPL0401A-10128-tap single-channel digital potentiometer (digipot) with I2C interface (address 0101110)

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Digital temperature sensors

TMP1022C digital temperature sensor, I2C/SMBus in 2.56mm2 package

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Digital temperature sensors

TMP107±0.4°C Temperature Sensor with Daisy-Chain UART, EEPROM, and Alert Function

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Digital temperature sensors

TMP175Temperature Sensor with 27 I2C/SMBus Addresses in Industry Standard LM75 Form Factor & Pinout

Data sheet document-pdfAcrobat PDF
Digital temperature sensors

TMP275±0.5°C Temperature Sensor with I2C/SMBus Interface in Industry Std LM75 Form Factor & Pinout

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Digital temperature sensors

TMP423Triple Remote and Local Temperature Sensor with N-Factor and Series-R Correction

Data sheet document-pdfAcrobat PDF
Digital temperature sensors

TMP751C digital temperature sensor, I2C/SMBus in industry standard LM75 form factor

Data sheet document-pdfAcrobat PDF
Humidity sensors

HDC10802% RH low-power digital relative humidity sensor

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Humidity sensors

HDC20102% RH ultra-small, low-power digital relative humidity sensor

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I2C level shifters, buffers & hubs

PCA9515A2-bit bidirectional 2.3- to 3.6-V 400-kHz I2C/SMBus buffer

Data sheet document-pdfAcrobat PDF
Inverting buffers & drivers

SN74LVC1G14Single 1.65-V to 5.5-V inverter with Schmitt-Trigger inputs

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MSP430 microcontrollers

MSP430FR57298 MHz MCU with 16KB FRAM, 1KB SRAM, 10-bit ADC, comparator, UART/SPI/I2C, timer

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MSP430 microcontrollers

MSP430G255316 MHz MCU with 16KB Flash, 512B SRAM, comparator, UART/SPI/I2C, timer

Data sheet document-pdfAcrobat PDF
N-channel MOSFETs

CSD17571Q230-V, N channel NexFET™ power MOSFET, single SON 2 mm x 2 mm, 29 mOhm

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Noninverting buffers & drivers

SN74LVC1G125Single 1.65-V to 5.5-V buffer with 3-state outputs

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Noninverting buffers & drivers

SN74LVC1G17Single 1.65-V to 5.5-V buffer with Schmitt-Trigger inputs

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OR gates

SN74LVC2G322-ch, 2-input, 1.65-V to 5.5-V OR gates

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Precision ADCs (<=10MSPS)

ADC101C02110-Bit, 189kSPS, 1-Ch SAR ADC with I2C and Alert Pin

Data sheet document-pdfAcrobat PDF
Precision ADCs (<=10MSPS)

ADC101C02710-Bit, 189kSPS, 1-Ch SAR ADC with I2C

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Precision DACs (<=10MSPS)

DAC101C08110-Bit Micro Power Digital-to-Analog Converter with an I2C-Compatible Interface

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Precision op amps (Vos<1mV)

OPA320Precision, Zero-Crossover, 20MHz, 0.9pA Ib, RRIO, CMOS Operational Amplifier ;

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Supervisor & reset ICs

TPS3808Low-quiescent current supervisor with programmable delay & manual reset

Data sheet document-pdfAcrobat PDF
Temperature switches

TMP300Resistor-Programmable, up to 18V-Capable Temp Switch and Analog Out Sensor

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Temperature switches

TMP302Pin-Selectable Trip Point 1.4V-Capable Family of Temperature Switches

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Temperature switches

TMP303Factory Programmed Temperature Window Comparator

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Technical documentation

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Type Title Date
* Design guide Accurate Temperature, Light Sensing, and Diagnostics Ref Design for Smart Grid Sep. 18, 2017

Related design resources

Hardware development

EVALUATION BOARD
MSP-EXP430FR5739 MSP-EXP430FR5739 Experimenter Board

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