TIDA-00294

High performance single-ended to differential-active interface for high-speed ADCs reference design

Overview

This reference design uses the ADC34J22 12b 50Msps JESD204B data converter and the THS4541 fully differential amplifer to demonstrate how to design a high performance active interface for high speed ADCs.  This type of circuit can be used in sensor front end, motor control, and test and measurement applications.  The circuit model and derivation of the design equations is presented along with the actual implementation on a PCB.  Results of this implementation are presented to show very similar performance as compared to a passive AC coupled transformer interface.

Features
  1. Provide a circuit model and schematic for the implementation of a single to differential active interface using a Fully Differential Amplifier
  2. Derive the design equations used to solve for the surrounding components around the circuit implementation
  3. Compare results obtained with the passive AC coupled transformer interface and the active DC fully differential amplifier interface.

Design files & products

Design files

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

TIDU500.PDF (560 K)

Reference design overview and verified performance test data

TIDRA51.PDF (298 K)

Detailed schematic diagram for design layout and components

TIDRA52.PDF (87 K)

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

TIDRA53.PDF (3003 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Fully differential amplifiers

THS4541High-Speed Differential I/O Amplifier

Data sheet document-pdfAcrobat PDF open-in-new HTML
Fully differential amplifiers

THS4541-Q1Automotive High-Speed Differential I/O Amplifier

Data sheet document-pdfAcrobat PDF open-in-new HTML
High-speed ADCs (>10MSPS)

ADC32J22Dual-Channel, 12-Bit, 50-MSPS Analog-to-Digital Converter (ADC)

Data sheet document-pdfAcrobat PDF open-in-new HTML
High-speed ADCs (>10MSPS)

ADC32J23Dual-Channel, 12-Bit, 80-MSPS Analog-to-Digital Converter (ADC)

Data sheet document-pdfAcrobat PDF open-in-new HTML
High-speed ADCs (>10MSPS)

ADC32J24Dual-Channel, 12-Bit, 125-MSPS Analog-to-Digital Converter (ADC)

Data sheet document-pdfAcrobat PDF open-in-new HTML
High-speed ADCs (>10MSPS)

ADC32J25Dual-Channel, 12-Bit, 160-MSPS Analog-to-Digital Converter (ADC)

Data sheet document-pdfAcrobat PDF open-in-new HTML
High-speed ADCs (>10MSPS)

ADC32J42Dual-Channel, 14-Bit, 50-MSPS Analog-to-Digital Converter (ADC)

Data sheet document-pdfAcrobat PDF open-in-new HTML
High-speed ADCs (>10MSPS)

ADC32J43Dual-Channel, 14-Bit, 80-MSPS Analog-to-Digital Converter (ADC)

Data sheet document-pdfAcrobat PDF open-in-new HTML
High-speed ADCs (>10MSPS)

ADC32J44Dual-Channel, 14-Bit, 125-MSPS Analog-to-Digital Converter (ADC)

Data sheet document-pdfAcrobat PDF open-in-new HTML
High-speed ADCs (>10MSPS)

ADC32J45Dual-Channel, 14-Bit, 160-MSPS Analog-to-Digital Converter (ADC)

Data sheet document-pdfAcrobat PDF open-in-new HTML
High-speed ADCs (>10MSPS)

ADC34J22Quad-Channel, 12-Bit, 50-MSPS Analog-to-Digital Converter (ADC)

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TPS7A81011-A, high-PSRR, adjustable ultra-low-dropout voltage regulator with enable

Data sheet document-pdfAcrobat PDF open-in-new HTML

Start development

Hardware

Evaluation board

DEV-ADC34J22 – DEV-ADC34J22 4-channel 50MSPS ADC Evaluation Module

The DEV-ADC34J22 is a four-channel, 50MSPS ADC Module designed to integrate with Altera’s HSMC standard. The DEV-ADC34J22 features TI’s new JESD204B compliant ADC34J22 Analog Digital Converter (ADC), with clocking conditioning using TI’s LMK04828 jitter cleaner. It provides (...)

Technical documentation

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Type Title Date
* Design guide High-Performance Single-Ended to Differential Active IF for High-Speed ADCs Aug. 20, 2014
Technical article Go differential to differentiate your precision design Aug. 11, 2016

Support & training

Third-party support
TI does not offer ongoing direct design support for this hardware. For support while working through your design, contact Dallas Logic Corporation.

Videos

Disclaimer
See the important notice and disclaimer covering reference designs and other TI resources.

Certain information and resources (including links to non-TI sites) above may be provided by a third-party partner, and is included here merely for your convenience. TI is not the provider of, and is not responsible for, the content of such information and resources, and you should evaluate them carefully for your intended uses and on your own behalf. The inclusion of such information and resources here does not imply endorsement of any third-party company by TI, and shall not be construed as a warranty or representation regarding the suitability of any third-party products or services, either alone or in combination with any TI product or service.