12-bit, 20-MSPS Data Acquisition Reference Design for Digitizer TIDA-00942 (ACTIVE)

Description & Features

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Key Document

Description

This reference design enables a cost-effective and low-power data acquisition system that provides an alternative to FPGA-based systems. It features a single-ended, high-impedance input that can be used in a wide number of applications, including portable instrumentation and digitizers.

The reference design utilizes the ADS4122 analog-to-digital converter (ADC), along the with the OPA656 and THS4541 operational amplifiers (op amps) to develop a 12-bit, 20-MSPS digitizer for the BeagleBone Cape form factor. The expansion board devleoped in this reference design interfaces with the BeagleBone Black development platform, which is a low-cost, open-source, community-supported environment based on the ARM Cortex-A8 processor.

Features
  • Single-ended-to-differential data acquisition reference design using the OPA656 and THS4541 op amps
  • Low-power (330/channel) operation suitable for handheld devices
  • Option to choose between 50 ohm / 1 Mohm input impedance
  • Low system cost; replaces FPGA for data capture with Sitara™ processor (BeagleBone Black)
  • 2V peak-to-peak input voltage range

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Schematic/Block Diagram

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Test Data

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Design Files

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TI Devices (8)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADS4122  12-Bit, 65-MSPS Analog-to-Digital Converter (ADC)  Analog-to-digital converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
AM3358  Sitara Processor: Arm Cortex-A8, 3D Graphics, PRU-ICSS  Sitara processors  Sample & Buy View Design Kits & Evaluation Modules
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  Special function amplifiers  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
TPS62590  2.25MHz, 1A Step-Down Converter in 2 x 2 SON Package  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
TPS7A30  Vin -3V to -36V, -200mA, Ultra-Low-Noise, High-PSRR, Low-Dropout (LDO) Linear Regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules
TPS7A49  Wide VIN, 150-mA, ultra-low-noise, high-PSRR low-dropout (LDO) linear regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ADS4122 Download Download
AM3358 NFBGA (ZCE)| 298 Download
Download Download
OPA656 Download Download
Download Download
THS4541 Download -
Download
TPS60403 Download Download
TPS62590 Download Download
TPS7A30 Download Download
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TPS7A49 Download Download
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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1443 02 Oct 2016
Design files (6)
Title Type Size (KB) Date
ZIP 175 03 Nov 2016
ZIP 1511 03 Nov 2016
PDF 722 03 Nov 2016
PDF 52 03 Nov 2016
PDF 253 03 Nov 2016
PDF 90 03 Nov 2016

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