Isolated, Transformerless, Bipolar Supply for 24-Bit ADCs Reference Design
TIDA-01434
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Key Document

Description

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

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Schematic/Block Diagram

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Design Files

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Parametrics
 TIDA-01434.1
(Output Voltage 1)
TIDA-01434.2
(Output Voltage 2)
TIDA-01434.3
(Output Voltage 3)
Vin (Min) (V)333
Vin (Max) (V)3.63.63.6
Vout (Nom) (V)3.3-2.52.5
Iout (Max) (A).05.01.01
Output Power (W).165.025.025
Isolated/Non-IsolatedIsolatedIsolatedIsolated
Input TypeDCDCDC
TopologyOtherLinear Regulator
Other
Linear Regulator

TI Devices (8)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADS124S08  24-Bit, 4kSPS, 12-Ch Delta-Sigma ADC With PGA and Voltage Reference for Precision Sensor Measurement  Analog-to-digital converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
ISO7741  High-speed, low-power, robust EMC quad-channel digital isolator  Isolation  Sample & Buy View Design Kits & Evaluation Modules
ISOW7841  High-efficiency, low-emissions, quad-channel, 3/1, reinforced digital isolator with integrated power  Isolation  Sample & Buy View Design Kits & Evaluation Modules
LM27762  Low-Noise Positive- and Negative-Output Charge Pump With Integrated LDO  DC/DC switching regulators  Sample & Buy View Design Kits & Evaluation Modules
REF6225  3ppm/C High-Precision Voltage Reference with Integrated High-Bandwidth Buffer  Voltage references  Sample & Buy View Design Kits & Evaluation Modules
SN74AHC1G04  Single Inverter Gate  Buffer/driver  Sample & Buy View Design Kits & Evaluation Modules
SN74AHC1G125  Single Bus Buffer Gate with 3-State Output  Buffer/driver  Sample & Buy View Design Kits & Evaluation Modules
TPS7A87  Dual 500mA Low-Noise (3.8μVRMS) LDO Voltage Regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ADS124S08 Download Download
Download Download
ISO7741 Download Download
Download Download
ISOW7841 Download Download
LM27762 Download Download
REF6225 Download Download
SN74AHC1G04 Download Download
Download Download
Download Download
SN74AHC1G125 Download Download
Download Download
Download Download
TPS7A87 Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 3883 23 Aug 2018
Design files (6)
Title Type Size (KB) Date
ZIP 2178 04 Sep 2018
PDF 731 03 Aug 2018
ZIP 568 20 Dec 2017
PDF 4186 20 Dec 2017
PDF 1466 20 Dec 2017
PDF 58 20 Dec 2017
Related Tools & Software

Design Kits & Evaluation Modules  ( 1 )

Name Part Number Tool Type
MSP430FR5969 LaunchPad Development Kit  MSP-EXP430FR5969  Evaluation Modules & Boards 

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