Home
Design resources
Reference designs

TIDA-01035

20-bit Isolated Data Acquisition Reference Design Optimizing Jitter for Max SNR and Sample Rate

Design files

TIDA-01035

Design files

Overview

The TIDA-01035 is a 20-bit, 1 MSPS isolated analog input data acquisition reference design demonstrating how to resolve and optimize performance challenges typical of digitally isolated data acquisition systems.

  • Significantly improves high frequency AC signal chain performance (SNR  and THD) by effectively mitigating ADC  sample clock jitter across isolation boundary
  • Maximizes sample rate by eliminating/minimizing  propagation delay introduced by a digital isolator
  • Provides option to evaluate performance with and without jitter mitigation technique with jumper
  • Includes detailed timing analysis detailing the isolator’s additive jitter impact on data throughput

Features
  • Isolated 20-bit, 1-MSPS, single channel  differential Input Data Acquisition (DAQ) system
  • Jitter mitigation technique realizes more than 18-dB  system-level SNR improvement for high frequency input signals (100 kHz Fin, 1 MSPS)
  • Reduced logic (on isolated ADC side) eliminates need for higher power and complex PLL solutions
  • Achieves 1-MSPS sampling rate while preserving low SPI CLK rates with the ADS8900B ADC’s innovative multiSPI™ and ADC-master or Source-Synchronous mode digital interfaces
  • Includes theory, calculations, component selection, PCB design and measurement results
??image.gallery.download_en_US?? View video with transcript Video

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.

download Design guide — TIDA-01035
TIDUCM5A.PDF (2414 K)

Reference design overview and verified performance test data

download Schematic — TIDA-01035
TIDRPA5.PDF (1275 K)

Detailed schematic diagram for design layout and components

download Bill of materials (BOM) — TIDA-01035
TIDRPA6.PDF (238 K)

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

download Assembly drawing — TIDA-01035
TIDRPA7.PDF (848 K)

Detailed overview of design layout for component placement

download CAD/CAE symbol — TIDA-01035
TIDRPA9.ZIP (5420 K)

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

download Gerber file — TIDA-01035
TIDCD16.ZIP (458 K)

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

download PCB layout — TIDA-01035
TIDRPA8.PDF (4897 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

AND gates

SN74LVC1G08 — Single 2-input, 1.65-V to 5.5-V AND gate

Data sheet: PDF
Buck modules (integrated inductor)

LMZ14203 — SIMPLE SWITCHER® 6V to 42V, 3A Power Module in Leaded Surface Mount TO Package

Data sheet: PDF | HTML
Digital isolators

ISO7840 — Highest isolation rating, quad-channel, 4/0, reinforced digital isolator

Data sheet: PDF | HTML
Digital isolators

ISO7842 — Highest isolation rating, quad-channel, 2/2, reinforced digital isolator

Data sheet: PDF | HTML
Fully differential amplifiers

THS4551 — Low Noise, Precision, 150MHz, Fully Differential Amplifier

Data sheet: PDF | HTML
I2C isolators

ISO1541 — 2.5-kVrms, isolated unidirectional clock, bidirectional I2C isolator

Data sheet: PDF | HTML
Inverting buffers & drivers

SN74LVC1G04 — Single 1.65-V to 5.5-V inverter

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

TPS709 — 150-mA, 30-V, ultra-low-IQ, low-dropout voltage regulator with reverse current protection and enable

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

TPS7A47 — 1-A, 36-V, low-noise, high-PSRR, low-dropout voltage regulator with enable

Data sheet: PDF | HTML
Precision ADCs (<=10MSPS)

ADS8900B — 20-bit, 1-MSPS, one-channel SAR ADC with internal VREF buffer, internal LDO and enhanced SPI

Data sheet: PDF | HTML
Precision op amps (Vos<1mV)

OPA376 — Precision (0.025mV), low noise (7.5nV/rtHz), low quiescent current (760uA) op amp

Data sheet: PDF | HTML
Series voltage references

REF5050 — 5-V, 3-µVpp/V noise, 3-ppm/°C drift precision series voltage reference

Data sheet: PDF | HTML
Transformer drivers

SN6501 — Low-noise, 350-mA, 410-kHz transformer driver for isolated power supplies

Data sheet: PDF | HTML

Technical documentation

star
= Top documentation selected by TI
No results found. Please clear your search and try again.
View all 3
Type Title Date
* Design guide 20-bit, 1 MSPS Isolated Data Acquisition (DAQ) Optimizing Jitter Design Guide (Rev. A) Jan. 17, 2017
Application note Fully-Differential Amplifiers (Rev. E) Sep. 19, 2016
Application note Noise Analysis In Operational Amplifier Circuits (Rev. B) May 23, 2007

Related design resources

Hardware development

EVALUATION BOARD
ADS8900BEVM-PDK — ADS8900B Fully-Differential Input, 20-Bit SAR ADC EVM Performance Demonstration Kit (PDK)

Reference designs

REFERENCE DESIGN
TIDA-00732 — 18-bit, 2-Msps Isolated Data Acquisition Reference Design to Achieve Maximum SNR and Sampling Rate TIDA-01036 — High-Q Active Differential Bandpass Filter Reference Design for Instrumentation Qualification TIDA-01037 — 20-bit, 1-MSPS Isolator Optimized Data Acquisition Reference Design Maximizing SNR and Sample Rate TIDA-01050 — Optimized Analog Front End DAQ System Reference Design for 18 bit SAR Data Converters TIDA-01051 — Reference Design Optimizing FPGA Utilization and Data Throughput for Automatic Test Equipment TIDA-01052 — ADC Driver Reference Design Improving Full Scale THD Using Negative Supply TIDA-01053 — ADC Driver Reference Design Optimizing THD, Noise, and SNR for High Dynamic Range Instrumentation TIDA-01054 — Multi-Rail Power Reference Design for Eliminating EMI Effects in High Performance DAQ Systems TIDA-01055 — ADC Voltage Reference Buffer Optimization Reference Design for High Performance DAQ Systems TIDA-01056 — 20-bit 1MSPS DAQ Reference Design Optimizing Power Supply Efficiency While Minimizing EMI TIDA-01057 — Reference Design Maximizing Signal Dynamic Range for True 10 Vpp Differential Input to 20 bit ADC

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​

Videos
Disclaimer
See the important notice and disclaimer covering reference designs and other TI resources.