18-bit, 2-Msps Isolated Data Acquisition Reference Design to Achieve Maximum SNR and Sampling Rate

(ACTIVE) TIDA-00732

Description & Features

Technical Documents

Support & Training

Order Now


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

Key Document

Description

This “18-bit, 2-Msps Isolated Data Acquisition Reference Design to achieve maximum SNR and sampling rate”  illustrates how to overcome performance-limiting challenges typical of isolated data acquisition system design:

  • Maximizing sampling rate by minimizing propagation delay introduced by digital isolator
  • Maximizing high-frequency AC signal chain performance (SNR) by effectively mitigating ADC sampling clock jitter introduced by the digital isolator

Features
  • 18-Bit, 2Msps, 1-Ch, differential input, isolated data acquisition (DAQ) system
  • Leverages multiSPI™ digital interface of ADS9110 to achieve 2MSPS sampling rate while maintaining a low SPI data rate
  • Source synchronous SPI data transfer mode to minimize isolator propagation delay and improve sampling rate
  • Techniques to reduce Isolator-induced jitter resulting in 12dB improvement in SNR (100kHz Fin, 2-MSPS)
  • Tested design includes theory and calculations, component selection, PCB design, and measurement results

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


  




TI Devices (17)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADS9110  18-Bit, 2MSPS, 15mW SAR ADC With multiSPI™ Digital Interface  Analog-to-Digital Converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
ISO1541  2.5 kVrms Isolated Unidirectional Clock, Bidirectional I2C Isolators  Isolation  Sample & Buy View Design Kits & Evaluation Modules
ISO7840  High-Immunity, 5.7kVRMS Reinforced Quad-Channel 4/0 Digital Isolator, 100Mbps  Isolation  Sample & Buy View Design Kits & Evaluation Modules
ISO7842  5.7 kVrms, 100 Mbps, Reinforced 4-Channel 2/2 Digital Isolator  Isolation  Sample & Buy View Design Kits & Evaluation Modules
LMK61E2  Ultra-Low Jitter Fully Programmable Oscillator, Integrated EEPROM, +/-50ppm  Clock & Timing  Sample & Buy View Design Kits & Evaluation Modules
LMZ14203  SIMPLE SWITCHER® 6V to 42V, 3A Power Module in Leaded Surface Mount TO Package  Non-Isolated Module  Sample & Buy View Design Kits & Evaluation Modules
OPA376  Precision, Low Noise, Low Iq Operational Amplifier  Operational Amplifiers (Op Amps)  Sample & Buy View Design Kits & Evaluation Modules
OPA378  Low-Noise, 900kHz, RRIO, Precision Operational Amplifier, Zerø-Drift Series  Operational Amplifiers (Op Amps)  Sample & Buy View Design Kits & Evaluation Modules
OPA625  High Bandwidth, High Precision, Low Noise & Distortion Amplifier SAR ADC Driver with Power Scaling  Operational Amplifiers (Op Amps)  Sample & Buy View Design Kits & Evaluation Modules
REF5045  Low Noise, Very Low Drift, Precision Series Voltage Reference  Voltage Reference  Sample & Buy View Design Kits & Evaluation Modules
SN6505A  Low-Noise 1-A , 160kHz Transformer Driver for Isolated Power Supplies  Isolation  Sample & Buy View Design Kits & Evaluation Modules
SN65LVDS4  500 Mbps LVDS Single High Speed Transceiver  LVDS/M-LVDS/PECL  Sample & Buy View Design Kits & Evaluation Modules
SN74LVC1G08  Single 2-Input Positive-AND Gate  Gate  Sample & Buy View Design Kits & Evaluation Modules
SN74LVC1G17  Single Schmitt-Trigger Buffer  Buffer/Driver  Sample & Buy View Design Kits & Evaluation Modules
TLV3012  Nanopower, 1.8V, SOT23 Push-Pull Comparator with Voltage Reference  Amplifiers  Sample & Buy View Design Kits & Evaluation Modules
TPS709  150mA 30V Ultra-Low-Iq Wide-Input Low-Dropout (LDO) Regulator With Reverse Current Protection  Linear Regulator (LDO)  Sample & Buy View Design Kits & Evaluation Modules
TPS7A47  36V, 1A, 4.17μVRMS, RF Low-Dropout (LDO) Voltage 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 4088 01 Apr 2016 100
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 25672 03 Jun 2016 53
PDF 3438 03 Jun 2016 126
ZIP 681 04 Apr 2016 35
PDF 3526 04 Apr 2016 23
PDF 467 04 Apr 2016 19
PDF 80 04 Apr 2016 24
Related Tools & Software

Reference Designs (2)

Design Kits & Evaluation Modules (1)

Name Part Number Tool Type
ADS9110 Evaluation Module  ADS9110EVM-PDK  Evaluation Modules & Boards 

Support & Training

Try our support forums.
Search expert answers for this part Ask a new question

Content is provided 'AS IS' by the respective TI and Community contributors and does not constitute TI specifications.
See terms of use.

Blogs