16 bit 1MSPS Data Acquisition Reference Design for Single-Ended Multiplexed Applications
TIPD173
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Key Document

Description

This TI Precision Verified Design details a systematic design methodology for a 16 bit, 1MSPS, single-ended data acquisition (DAQ) block optimized to achieve excellent settling time, power consumption, static performance and dynamic performance for multiplexed applications.  The design features a 16-bit, high-precision, successive-approximation-register (SAR) analog-digital converter (ADC); low noise, low power and wide bandwidth ADC input drive circuitry; and, a very low drift ADC voltage reference and corresponding reference input drive circuitry.

This design is well suited to applications which require low-latency, multi-channel,  data acqusition for multi-sensor measurements such as environmental (temperature, pressure, etc..), biopotential and power measurement.

Features
  • Contains Theory, Component Selection, Simulation, Schematic, PCB Layout, and Measured Performance Results
  • Optimized for 900ns (max) 16-bit step-input transient settling time
  • Power:  21.5mW @ AVDD = 3.3V
  • Measured ENOB of 14.58 bits
  • Utilizes ADS8860 (16bit, 1Msps SAR ADC), OPA320 (Input Driver), THS4281 + OPA333 + REF5040 (Reference Driver)

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Schematic/Block Diagram

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Design Files

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TI Devices (6)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADS8860  16-Bit, 1-MSPS, 1-ch SAR ADC with single-ended input, SPI interface and daisy-chain  Analog-to-digital converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
OPA320  Precision, Zero-Crossover, 20MHz, 0.9pA Ib, RRIO, CMOS Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
OPA333  1.8-V, 17-µA, microPower, precision, zero-drift CMOS op amp  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
REF5040  Low Noise, Very Low Drift, Precision Series Voltage Reference  Voltage references  Sample & Buy Not Available
REF6025  5ppm/C High-Precision Voltage Reference with Integrated High-Bandwidth Buffer  Voltage references  Sample & Buy View Design Kits & Evaluation Modules
THS4281  Very Low-Power High Speed Rail-To-Rail Input/Output Voltage Feedback Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ADS8860 Download
OPA320 Download Download
OPA333 Download Download
Download Download
Download Download
REF5040 Download Download
Download Download
REF6025 Download Download
THS4281 Download Download
Download Download
Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1861 20 Apr 2017
Design files (4)
Title Type Size (KB) Date
PDF 349 09 May 2017
PDF 106 09 May 2017
ZIP 50 02 Oct 2014
ZIP 302 02 Oct 2014
Related Tools & Software

Software (2)



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