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TIDA-01434

Isolated, Transformerless, Bipolar Supply for 24-Bit ADCs Reference Design

Design files

TIDA-01434

Design files

Overview

This isolated, 3.65-mm thin reference design enables highly-integrated, bipolar input and high-performance solutions with a 24-bit delta-sigma analog-to-digital converter (ADC). Modern analog input modules need high performance in different aspects such as higher channel density at the same room size, which requires lower power consumption, and a wider operating temperature range at the same time.

Features
  • Performance evaluation of integrated isolated power supply, technology and inverting charge pump in conjunction with high precision delta-sigma ADC ADS124S08
  • Isolated power design with a 3.3-V backplane power supply source
  • Transformerless, 3.65-mm total height, highly integrated design
  • Comparison of effective resolution of ADS124S08 data sheet values, reference setup and design under test
Output voltage options TIDA-01434.1 TIDA-01434.2 TIDA-01434.3
Vin (Min) (V) 3 3 3
Vin (Max) (V) 3.6 3.6 3.6
Vout (Nom) (V) 3.3 -2.5 2.5
Iout (Max) (A) .05 .01 .01
Output Power (W) .165 .025 .025
Isolated/Non-Isolated Isolated Isolated Isolated
Input Type DC DC DC
Topology Other Linear Regulator^Other Linear Regulator
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Design files & products

Design files

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

download Design guide — TIDA-01434
TIDUDP2A.PDF (3883 KB)

Reference design overview and verified performance test data

download Assembly drawing — TIDA-01434
TIDRV07.PDF (1466 KB)

Detailed overview of design layout for component placement

download Bill of materials (BOM) — TIDA-01434
TIDRV06.PDF (59 KB)

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

download CAD/CAE symbol — TIDA-01434
TIDRV09A.ZIP (2179 KB)

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

download Gerber file — TIDA-01434
TIDCEC6.ZIP (568 KB)

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

download PCB layout — TIDA-01434
TIDRV08.PDF (4187 KB)

PCB layer plot file used for generating PCB design layout

download Schematic — TIDA-01434
TIDRV05A.PDF (732 KB)

Detailed schematic diagram for design layout and components

Products

Includes TI products in the design and potential alternatives.

Noninverting buffers & drivers

SN74AHC1G125 — Single 2-V to 5.5-V buffer with 3-state outputs

Data sheet: PDF | HTML
Series voltage references

REF6225 — 2.5-V, 3-ppm/°C high-precision voltage reference with integrated buffer & enable pin

Data sheet: PDF | HTML
Precision ADCs

ADS124S08 — 24-bit, 4-kSPS, 12-ch delta-sigma ADC with PGA and voltage reference for sensor measurement

Data sheet: PDF | HTML
DC/DC converters

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

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

TPS7A87 — 500-mA, low-noise, high-PSRR, dual-channel adjustable ultra-low-dropout voltage regulator

Data sheet: PDF | HTML
Signal isolators with integrated power

ISOW7841 — Quad-channel, 3/1, reinforced digital isolator with integrated power

Data sheet: PDF | HTML
Inverting buffers & drivers

SN74AHC1G04 — Single 2-V to 5.5-V inverter

Data sheet: PDF | HTML
Digital isolators

ISO7741 — Robust EMC, quad-channel, 3/1, reinforced digital isolator

Data sheet: PDF | HTML

Start development

Hardware development

Development kit

MSP-EXP430FR5969 — MSP430FR5969 LaunchPad™ development kit

This isolated, 3.65-mm thin reference design enables highly-integrated, bipolar input and high-performance solutions with a 24-bit delta-sigma analog-to-digital converter (ADC). Modern analog input modules need high performance in different aspects such as higher channel density at the same room (...)
EVM user’s guide: PDF
Supported products & hardware

Supported products & hardware

Hardware development
Reference design
TIDA-00246 — Generic Energy Harvesting Adapter Module for Thermoelectric Generators (TEG) Reference Design TIDA-01172 — Dynamic Voltage Scaling Power Solution for MSP430 Devices With Single-Channel LDO Reference Design TIDA-01434 — Isolated, Transformerless, Bipolar Supply for 24-Bit ADCs Reference Design TIDM-3DGRAPHICS-QVGA — QVGA 3-D Graphics on Ultra Low Power Microcontrollers TIDM-KNXTHERMOSTAT — Wired KNX Thermostat Reference Design TIDM-SMBUS — SMBus Design Using Low Power Microcontroller
Daughter card
TPS23881B1EVM-024 — TPS23881B daughter card
Evaluation board
ADS1282EVM-CVAL — ADS1282-SP radiation-tolerant evaluation module
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MSP-EXP430FR5969 — MSP430FR5969 LaunchPad™ development kit

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Hardware development
Reference design
TIDA-00246 — Generic Energy Harvesting Adapter Module for Thermoelectric Generators (TEG) Reference Design TIDA-01172 — Dynamic Voltage Scaling Power Solution for MSP430 Devices With Single-Channel LDO Reference Design TIDA-01434 — Isolated, Transformerless, Bipolar Supply for 24-Bit ADCs Reference Design TIDM-3DGRAPHICS-QVGA — QVGA 3-D Graphics on Ultra Low Power Microcontrollers TIDM-KNXTHERMOSTAT — Wired KNX Thermostat Reference Design TIDM-SMBUS — SMBus Design Using Low Power Microcontroller
Daughter card
TPS23881B1EVM-024 — TPS23881B daughter card
Evaluation board
ADS1282EVM-CVAL — ADS1282-SP radiation-tolerant evaluation module
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 Isolated, Transformerless, Bipolar Supply for 24-Bit ADCs Reference Design (Rev. A) Aug 23, 2018
Product overview Isolated Power Topologies for PLC I/O Modules and Other Low-Power Applications (Rev. A) PDF | HTML Aug 20, 2024

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