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

(ACTIVE) TIDA-00799

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Key Document

Description

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

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  



Schematic/Block Diagram

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Design Guide

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Design Files

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Bill of Materials (BOM)

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TI Devices (10)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADC3422  Quad-Channel, 12-Bit, 50-MSPS Analog-to-Digital Converter (ADC)  Analog-to-digital converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
CSD18532Q5B  60-V, N-Channel NexFET™ Power MOSFET  MOSFETs  Sample & Buy View Design Kits & Evaluation Modules
INA138  36V, High-Side, Current Output Current Sense Amplifier  Current sense amplifiers  Sample & Buy Not Available
OPA656  Wideband, Unity Gain Stable FET-Input Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
THS4541  High-Speed Differential I/O Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
TPS2400  Overvoltage/Undervoltage Protection IC in SOT-23-5  Power switches  Sample & Buy View Design Kits & Evaluation Modules
TPS60403  60mA Charge Pump Voltage Inverter with Fixed 250kHz Operation  DC/DC switching regulators  Sample & Buy View Design Kits & Evaluation Modules
TPS62230  2 MHz Ultra Small Step Down Converter with DCS-Control in 1x1.5 SON Package  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
TPS7A49  Vin 3V to 36V, 150mA, Ultra-Low-Noise, High-PSRR Low-Dropout (LDO) Linear Regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS7A8300  2A, Low-Dropout Voltage Regulator for High-Speed Communication Systems  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD18532Q5B VSON-CLIP (DNK)| 8 Download -
INA138 Download Download
OPA656 Download Download
Download Download
THS4541 Download -
Download
TPS2400 Download Download
TPS60403 Download Download
TPS62230 Download Download
TPS7A49 Download Download
Download Download
TPS7A8300 Download
Download -

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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

Datasheet (1)
Title Abstract Type Size (KB) Date Views
PDF 3979 30 Sep 2015
User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 5771 27 Sep 2016 16
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 264 21 Oct 2016 4
ZIP 1223 21 Oct 2016 4
PDF 877 21 Oct 2016 5
PDF 60 21 Oct 2016 5
PDF 262 21 Oct 2016 9
PDF 108 21 Oct 2016 15

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