12-bit, 20-MSPS Data Acquisition Reference Design for Digitizer

(ACTIVE) TIDA-00942

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

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


  




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  ARM Cortex-A8  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  Operational Amplifiers (Op Amps)  Sample & Buy View Design Kits & Evaluation Modules
TPS60403  60mA Charge Pump Voltage Inverter with Fixed 250kHz Operation  Buck/Boost, Inverting or Split-Rail  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 Linear Regulator  Linear Regulator (LDO)  Sample & Buy View Design Kits & Evaluation Modules
TPS7A49  Vin 3V to 36V, 150mA, Ultra-Low Noise, High PSRR, Low-Dropout Linear Regulator  Linear Regulator (LDO)  Sample & Buy View Design Kits & Evaluation Modules

Technical Documents

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

User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 1443 02 Oct 2016 207
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 175 03 Nov 2016 63
ZIP 1511 03 Nov 2016 34
PDF 722 03 Nov 2016 30
PDF 52 03 Nov 2016 24
PDF 253 03 Nov 2016 27
PDF 90 03 Nov 2016 84


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