TIPD173

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

TIPD173

Design files

Overview

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)
Industrial

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDU504A.PDF (1861 K)

Reference design overview and verified performance test data

TIDRAU9A.PDF (349 K)

Detailed schematic diagram for design layout and components

TIDC662.ZIP (912 K)

Detailed schematic diagram for design layout and components

TIDRAV0A.PDF (106 K)

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

TIDRAV1.ZIP (302 K)

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

TIDC660.ZIP (50 K)

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

Products

Includes TI products in the design and potential alternatives.

High-speed op amps (GBW ≥ 50 MHz)

THS4281Very Low-Power High Speed Rail-To-Rail Input/Output Voltage Feedback Operational Amplifier

Data sheet document-pdfAcrobat PDF open-in-new HTML
Precision ADCs (<=10MSPS)

ADS886016-bit, 1-MSPS, 1-channel SAR ADC with single-ended input, SPI and daisy chain

Data sheet document-pdfAcrobat PDF open-in-new HTML
Precision op amps (Vos<1mV)

OPA320Precision, zero-crossover, 20-MHz, 0.9-pA Ib, RRIO, CMOS operational amplifier

Data sheet document-pdfAcrobat PDF open-in-new HTML
Precision op amps (Vos<1mV)

OPA3331.8-V, 17-µA, microPower, precision, zero-drift CMOS op amp

Data sheet document-pdfAcrobat PDF open-in-new HTML
Series voltage references

REF50404.096-V, 3-µVpp/V noise, 3-ppm/°C drift precision series voltage reference

Data sheet document-pdfAcrobat PDF open-in-new HTML
Series voltage references

REF60252.5-V, 5-ppm/°C high-precision voltage reference with integrated buffer & enable pin

Data sheet document-pdfAcrobat PDF open-in-new HTML

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Software

Support software

TIPD173 Simulation — TIDC661.ZIP (116 K)

Technical documentation

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Type Title Date
* Design guide 16-Bit 1-MSPS Data Acquisition Ref Design for Single-Ended Multiplexed Apps (Rev. A) Apr. 20, 2017
Technical article Why is it so challenging to design a voltage reference circuit for an ADC? Sep. 16, 2016

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