TIDA-00799

Quad-Channel, 12-Bit, 50-MSPS ADC Reference Design With Low Noise, Low Distortion, DC and AC Inputs

TIDA-00799

Design files

Overview

This reference design demonstrates how to implement a single-ended-to-differential input path, which can be AC-coupled or DC-coupled for an ADC3422. It also explains how to design a high-input impedance, DC-coupled input path. The reference design can be used for applications such as low-power data acquisition, portable instrumentation and IGBT diagnositics.

Features
  • Single-ended-to-differential reference design using the OPA656 and THS4541
  • Channel A and channel B are AC / DC coupled using the THS4541
  • THS4541 and ADC3422 achieve 70-dB SNR 
  • Low-power (57mW/channel) operation suitable for battery-powered devices
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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.

TIDUBS9A.PDF (5771 K)

Reference design overview and verified performance test data

TIDRO26.PDF (108 K)

Detailed schematic diagram for design layout and components

TIDRO27.PDF (262 K)

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

TIDRO28.PDF (60 K)

Detailed overview of design layout for component placement

TIDRO30.ZIP (1223 K)

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

TIDCCR4.ZIP (264 K)

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

TIDRO29.PDF (877 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

AC/DC & DC/DC converters (integrated FET)

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AC/DC & DC/DC converters (integrated FET)

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Analog current-sense amplifiers

INA1382.7 to 36V, 800kHz Variable gain current sense amplifier

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Fully differential amplifiers

THS4541High-Speed Differential I/O Amplifier

Data sheet: PDF | HTML
High-speed ADCs (≥10 MSPS)

ADC3422Quad-Channel, 12-Bit, 50-MSPS Analog-to-Digital Converter (ADC)

Data sheet: PDF | HTML
High-speed op amps (GBW ≥ 50 MHz)

OPA656Wideband, Unity Gain Stable FET-Input Operational Amplifier

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

TPS7A49150-mA, 36-V, low-noise, high-PSRR, adjustable low-dropout voltage regulator with enable

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

TPS7A83002-A, low-VIN, low-2-A, low-VIN, low-noise, ultra-low-dropout voltage regulator with power good wi

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MOSFETs

CSD18532Q5B60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 3.2 mOhm

Data sheet: PDF | HTML
eFuses & hot swap controllers

TPS24005.5-V over voltage protection controller with 100-V input transient protection

Data sheet: PDF | HTML

Technical documentation

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* Design guide Low-Power, Quad 12-Bit 50-MSPS ADC Reference Design With Low-Noise (Rev. A) Sep. 27, 2016

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