20-bit Isolated Data Acquisition Reference Design Optimizing Jitter for Max SNR and Sample Rate
TIDA-01035
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
See the Important Notice and Disclaimer covering reference designs and other TI resources.
Key Document
- 20-bit, 1 MSPS Isolated Data Acquisition (DAQ) Optimizing Jitter Design Guide (Rev. A)
(PDF 2414 KB)
17 Jan 2017
- TIDA-01035 Schematic and Block Diagram
(PDF 1275 KB)
16 Dec 2016
Description
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
See the Important Notice and Disclaimer covering reference designs and other TI resources.
