TIDA-010065

High-efficiency, low-emission, isolated DC/DC converter-based analog input module reference design

Design files

TIDA-010065

Design files

Overview

This reference design is a simplified architecture for generating an isolated power supply for isolated amplifiers for measuring isolated voltages and currents. A fully integrated DC/DC converter with reinforced isolation operating from a 5-V input with configurable 5-V or 5.4-V output (headroom for low dropout regulator (LDO)) generates the isolated power. Shunts that are interfaced to ±50-mV input range isolation amplifiers configured as channel isolated inputs measure the current. Potential divider output interfaced to ±250-mV or ±12-V input range isolation amplifiers configured as group isolated inputs measure the voltage. The outputs of the isolation amplifiers interface directly to 24-bit delta sigma analog-to-digital converter (ADC) or are scaled to ±10 V using gain amplifiers and interfaced to 16-bit SAR ADC for performance evaluation. On-board digital diagnostics improves reliability and enhances system performance.

Features

Generation of high efficiency isolated supply of 5 or 5.4 V (LDO headroom) from 4.5-V to 5.5-V input providing reinforced isolation
Measures three group isolated voltage inputs with a range of 3 V to 350 V providing pin compatible basic or reinforced isolation and three isolated current inputs from 40 mA to 12.5 A providing reinforced isolation
ISO224 with input range of ±12-V input range connects directly to low-power current transformer output as per IEC 60044-8
Measurement of DC voltage and current with 1-µs fast fault detection comparator path
Gain scaling of isolation amplifier output to ADS8588H input range of ±10 V using instrumentation, precision or general purpose amplifiers
Achieves ±0.2% accuracy for both voltage and current using 16-bit SAR or 24-bit delta-sigma ADC

Industrial

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Design files & products

Design files

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

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Design guide — TIDA-010065

TIDUEU7.PDF (989 KB)

Reference design overview and verified performance test data

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Assembly drawing — TIDA-010065

TIDM211.ZIP (1005 KB)

Detailed overview of design layout for component placement

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Bill of materials (BOM) — TIDA-010065

TIDM210.ZIP (376 KB)

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

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CAD/CAE symbol — TIDA-010065

TIDM213.ZIP (6440 KB)

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

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Gerber file — TIDA-010065

TIDCFM8.ZIP (1180 KB)

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

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PCB layout — TIDA-010065

TIDM212.ZIP (3172 KB)

PCB layer plot file used for generating PCB design layout

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Schematic — TIDA-010065

TIDM209.ZIP (1282 KB)

Detailed schematic diagram for design layout and components

Products

Includes TI products in the design and potential alternatives.

AND gates

SN74LVC1G08 — 1-ch, 2-input 1.65-V to 5.5-V 32 mA drive strength AND gate

Data sheet: PDF | HTML

Analog & precision switches & muxes

CD74HC4051 — 5V, 8:1, 1-channel, analog multiplexer

Data sheet: PDF | HTML

Analog current-sense amplifiers

INA301 — 36V, 550kHz, 4V/µs, high-precision current sense amplifier w/ comparator

Data sheet: PDF | HTML

Analog temperature sensors

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

Data sheet: PDF | HTML

Comparators

LM2903 — Dual differential comparator

Data sheet: PDF | HTML

Comparators

LMV393 — Dual General Purpose Low-Voltage Comparator

Data sheet: PDF | HTML

Comparators

TLV3202 — 5.5-V, high-speed, dual push-pull comparator

Data sheet: PDF | HTML

DC/DC converters

LM27762 — Low-Noise Positive- and Negative-Output Charge Pump With Integrated LDO

Data sheet: PDF | HTML

Digital isolators

ISO7720 — Reinforced 2-channel, 2/0, digital isolator

Data sheet: PDF | HTML

Digital isolators

ISO7721 — Reinforced 2-channel, 1/1, digital isolator

Data sheet: PDF | HTML

Digital isolators

ISO7760 — Reinforced 6-channel, 6/0, digital isolator

Data sheet: PDF | HTML

Digital isolators

ISO7761 — Reinforced 6-channel, 5/1, digital isolator

Data sheet: PDF | HTML

Digital isolators

ISO7762 — Reinforced 6-channel, 4/2, digital isolator

Data sheet: PDF | HTML

General-purpose op amps

OPA2990 — Dual, 40-V, 1.1-MHz, low-power operational amplifier

Data sheet: PDF | HTML

General-purpose op amps

TLV6001 — Single, 5.5-V, 1-MHz, RRIO operational amplifier

Data sheet: PDF | HTML

General-purpose op amps

TLV9062 — Dual, 5.5-V, 10-MHz operational amplifier

Data sheet: PDF | HTML

Hall-effect latches & switches

DRV5032 — Low-power (5Hz, <1µA) low-voltage (up to 5.5V) switch

Data sheet: PDF | HTML

Ideal diode & ORing controllers

LM74700-Q1 — 3.2-V to 65-V, 80-uA IQ automotive ideal diode controller

Data sheet: PDF | HTML

Instrumentation amplifiers

INA333 — Low-Power, Zero-Drift, Precision Instrumentation Amplifier

Data sheet: PDF | HTML

Instrumentation amplifiers

INA826 — Precision, 200-μA Supply Current, 36-V Supply Instrumentation Amplifier

Data sheet: PDF | HTML

Inverting buffers & drivers

SN74LVC1G14 — Single 1.65-V to 5.5-V inverter with Schmitt-Trigger inputs

Data sheet: PDF | HTML

Isolated amplifiers

AMC1100 — ±250-mV input, precision current sensing low-cost basic isolated amplifier

Data sheet: PDF | HTML

Isolated amplifiers

AMC1200 — ±250-mV input, precision current sensing basic isolated amplifier

Data sheet: PDF | HTML

Isolated amplifiers

AMC1300 — ±250-mV input, precision current sensing reinforced isolated amplifier

Data sheet: PDF | HTML

Isolated amplifiers

AMC1302 — ±50-mV input, precision current sensing reinforced isolated amplifier

Data sheet: PDF | HTML

Isolated amplifiers

AMC1311 — 2-V input, precision voltage sensing reinforced isolated amplifier

Data sheet: PDF | HTML

Isolated amplifiers

AMC3301 — ±250-mV input, precision current sensing reinforced isolated amplifier with integrated DC/DC

Data sheet: PDF | HTML

Isolated amplifiers

ISO124 — ±10-V input, precision voltage sensing low-cost isolated amplifier

Data sheet: PDF | HTML

Isolated amplifiers

ISO224 — ±12-V input, precision voltage sensing reinforced isolated amplifier

Data sheet: PDF | HTML

Isolated power modules (integrated transformer)

UCC12050 — 500-mW, high-efficiency, 5-kVRMS isolated DC/DC converter

Data sheet: PDF | HTML

LCD & OLED display power & drivers

TPS65131 — Split-Rail Converter with Dual, Positive and Negative Outputs (750mA typ)

Data sheet: PDF | HTML

Linear & low-dropout (LDO) regulators

TLV1117LV — 1-A, low-dropout voltage regulator

Data sheet: PDF | HTML

Linear & low-dropout (LDO) regulators

TLV704 — 150-mA 24-V ultra-low-IQ low-dropout (LDO) voltage regulator

Data sheet: PDF | HTML

Linear & low-dropout (LDO) regulators

TPS709 — 150-mA, 30-V, ultra-low-IQ, low-dropout voltage regulator with reverse current protection and enable

Data sheet: PDF | HTML

Linear & low-dropout (LDO) regulators

TPS763 — 150-mA, 10-V, low-dropout voltage regulator with enable

Data sheet: PDF | HTML

Linear & low-dropout (LDO) regulators

TPS7A39 — 150-mA, 33-V, low-noise, high-PSRR, dual-channel positive & negative low-dropout voltage regulator

Data sheet: PDF | HTML

Load switches

TPS22944 — 5.5-V, 0.1-A, 500-mΩ, load switch with current limit and active high enable

Data sheet: PDF | HTML

MOSFETs

CSD17571Q2 — 30-V, N channel NexFET™ power MOSFET, single SON 2 mm x 2 mm, 29 mOhm

Data sheet: PDF | HTML

MOSFETs

CSD18534Q5A — 60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 9.8 mOhm

Data sheet: PDF | HTML

Noninverting buffers & drivers

SN74LVC1G125 — Single 1.65-V to 5.5-V buffer with 3-state outputs

Data sheet: PDF | HTML

Noninverting buffers & drivers

SN74LVC1G17 — Single 1.65-V to 5.5-V buffer with Schmitt-Trigger inputs

Data sheet: PDF | HTML

Noninverting buffers & drivers

SN74LVC2G34 — 2-ch, 1.65-V to 5.5-V buffers

Data sheet: PDF | HTML

OR gates

SN74LVC1G32 — 1-ch, 2-input 1.65-V to 5.5-V 32-mA drive strength OR gate

Data sheet: PDF | HTML

Power modules (integrated inductor)

LMZ14201 — SIMPLE SWITCHER® 6V to 42V, 1A Power Module in Leaded Surface Mount TO Package

Data sheet: PDF | HTML

Power modules (integrated inductor)

LMZ20501 — 2.7V to 5.5V, 1A High Density Nano Module

Data sheet: PDF | HTML

Precision op amps (Vos<1mV)

OPA2180 — 0.1 uV/°C DRIFT, Low Noise, Rail-to-Rail Output, 36V Zero-Drift Op Amp

Data sheet: PDF | HTML

Precision op amps (Vos<1mV)

OPA2188 — 0.03µV/°C, 6µV Vos, Low Noise, Rail-to-Rail Output, 36V Zero-Drift Operational Amplifier

Data sheet: PDF | HTML

Reset & watchdog ICs

TPS3897 — Single-channel, ultra-small, adjustable supervisor with active-high, open-drain output

Data sheet: PDF | HTML

TVS diodes

TVS3300 — 33V flat-clamp surge protection device

Data sheet: PDF | HTML

Temperature switches

TMP300 — Resistor-Programmable, up to 18V-Capable Temp Switch and Analog Out Sensor

Data sheet: PDF | HTML

Transformer drivers

SN6501 — Low-noise, 350-mA, 410-kHz transformer driver for isolated power supplies

Data sheet: PDF | HTML

Transformer drivers

SN6505A — Low-noise, 1-A, 160-kHz transformer driver with soft start for isolated power supplies

Data sheet: PDF | HTML

Transformer drivers

SN6505B — Low-noise, 1-A, 420-kHz transformer driver with soft start for isolated power supplies

Data sheet: PDF | HTML

eFuses (integrated hot swaps)

TPS2662 — 4.5-V to 60-V, 478mΩ, 0.025-0.88A eFuse with integrated input and output reverse polarity protection

Data sheet: PDF | HTML

Start development

Hardware development

Evaluation board

ADS131A04EVM — ADS131A04 evaluation module

This reference design is a simplified architecture for generating an isolated power supply for isolated amplifiers for measuring isolated voltages and currents. A fully integrated DC/DC converter with reinforced isolation operating from a 5-V input with configurable 5-V or 5.4-V output (headroom (...)

EVM user’s guide: PDF | HTML

Supported products & hardware

Hardware development

Reference design

TIDA-010065 — High-efficiency, low-emission, isolated DC/DC converter-based analog input module reference design

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TIDA-010065 — High-efficiency, low-emission, isolated DC/DC converter-based analog input module reference design

Evaluation board

ADS131E08V2EVM-PDK — ADS131E08V2EVM-PDK evaluation module

This reference design is a simplified architecture for generating an isolated power supply for isolated amplifiers for measuring isolated voltages and currents. A fully integrated DC/DC converter with reinforced isolation operating from a 5-V input with configurable 5-V or 5.4-V output (headroom (...)

EVM user’s guide: PDF

Supported products & hardware

Hardware development

Reference design

TIDA-010065 — High-efficiency, low-emission, isolated DC/DC converter-based analog input module reference design

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ADS131E08V2EVM-PDK — ADS131E08V2EVM-PDK evaluation module

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TIDA-010065 — High-efficiency, low-emission, isolated DC/DC converter-based analog input module reference design

Evaluation board

ADS131M04EVM — ADS131M04 evaluation module for four-channel, 24-bit, simultaneous-sampling, delta-sigma ADC

This reference design is a simplified architecture for generating an isolated power supply for isolated amplifiers for measuring isolated voltages and currents. A fully integrated DC/DC converter with reinforced isolation operating from a 5-V input with configurable 5-V or 5.4-V output (headroom (...)

EVM user’s guide: PDF

Supported products & hardware

Hardware development

Reference design

TIDA-010065 — High-efficiency, low-emission, isolated DC/DC converter-based analog input module reference design

In stock

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ADS131M04EVM — ADS131M04 evaluation module for four-channel, 24-bit, simultaneous-sampling, delta-sigma ADC

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Reference design

TIDA-010065 — High-efficiency, low-emission, isolated DC/DC converter-based analog input module reference design

Evaluation board

ADS8588SEVM-PDK — ADS8588S 16-Bit High-Speed 8-Ch Simultaneous-Sampling ADC EVM Performance Demonstration Kit (PDK)

This reference design is a simplified architecture for generating an isolated power supply for isolated amplifiers for measuring isolated voltages and currents. A fully integrated DC/DC converter with reinforced isolation operating from a 5-V input with configurable 5-V or 5.4-V output (headroom (...)

EVM user’s guide: PDF

Supported products & hardware

Hardware development

Reference design

TIDA-00834 — High Accuracy Analog Front End Using 16-Bit SAR ADC with ±10V Measurement Range Reference Design

TIDA-010055 — Non-isolated power architecture with diagnostics reference design for protection relay modules

TIDA-010065 — High-efficiency, low-emission, isolated DC/DC converter-based analog input module reference design

In stock

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ADS8588SEVM-PDK — ADS8588S 16-Bit High-Speed 8-Ch Simultaneous-Sampling ADC EVM Performance Demonstration Kit (PDK)

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Latest version

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Release date:

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Hardware development

Reference design

TIDA-00834 — High Accuracy Analog Front End Using 16-Bit SAR ADC with ±10V Measurement Range Reference Design

TIDA-010055 — Non-isolated power architecture with diagnostics reference design for protection relay modules

TIDA-010065 — High-efficiency, low-emission, isolated DC/DC converter-based analog input module reference design

Evaluation board

ADS8688EVM-PDK — ADS8688 16-bit, 500-kSPS, 8-channel, single-supply, SAR ADC EVM performance demonstration kit (PDK)

This reference design is a simplified architecture for generating an isolated power supply for isolated amplifiers for measuring isolated voltages and currents. A fully integrated DC/DC converter with reinforced isolation operating from a 5-V input with configurable 5-V or 5.4-V output (headroom (...)

EVM user’s guide: PDF | HTML

Supported products & hardware

Hardware development

Reference design

TIDA-010065 — High-efficiency, low-emission, isolated DC/DC converter-based analog input module reference design

In stock

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Out of stock on TI.com

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ADS8688EVM-PDK — ADS8688 16-bit, 500-kSPS, 8-channel, single-supply, SAR ADC EVM performance demonstration kit (PDK)

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TIDA-010065 — High-efficiency, low-emission, isolated DC/DC converter-based analog input module reference design

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Technical documentation

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Top documentation	Type	Title	Format options	Date
*	Design guide	High-Efficiency, Low-Emissions, Isolated DC/DC Converter Based Analog Input		Sep 25, 2019
	White paper	Addressing High-Volt Design Challenges w/ Reliable and Affordable Isolation Tech (Rev. D)	PDF \| HTML	May 15, 2026

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REFERENCE DESIGN

TIDA-00227 — Small Form Factor 12W Ultra Wide Range Power Supply for Protection Relays - Reference Design

TIDA-010055 — Non-isolated power architecture with diagnostics reference design for protection relay modules

TIDA-01576 — High accuracy analog input module reference design with 16-bit 1-MSPS dual simultaneous-sampling ADC

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