Data Acquisition at 1KHz AC, 1mW, 18bit, 1Msps Reference Design TIPD114 (ACTIVE)

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Key Document

Description

This TI Verified Design provides results of a low power, low throughput use case of ADS8881. One of the ways to reduce power for a low throughput application is to select a high throughput (1 MSPS) part and run it at low speed. The power consumed by ADS8881 is 55uW for 10kSPS. The reference drive and the input drive needs to be optimized for low power too. This design covers the various tradeoff's that need to be made and the choices to pick from, in order to bring the overall system power down to 1mW.

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Features
  • 18 Bit, 10ksps Sampling Rate
  • 1kHz AC
  • Optimization: Ultra Low Power
  • Power: 1mW @ AVDD =3.3V
  • Utilizes ADS8881 (18bit, 1Msps SAR ADC), OPA2333 (Input), OPA313 + REF3325 (Reference)
  •  

      This Verified Design Includes:

    • Theory
    • Component Selection
    • TINA-TI Simulation
    • Schematics and PCB Layout
    • Verification and Measured Performance
    • Modification Options
  •  


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Schematic/Block Diagram

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Test Data

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Design Files

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TI Devices (4)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADS8881  18-Bit, 1-MSPS, 1-Ch SAR ADC with True-Differential Input, SPI Interface and Daisy-Chain  Analog-to-digital converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
OPA2333  1.8V, 17µA, 2 channels, microPower, Precision, Zero Drift CMOS Op Amp  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
OPA313  1-MHz, Micropower, Low-Noise, Rail-to-Rail I/O 1.8-V Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
REF3325  30ppm/°C Drift, 3.9µA, SOT23-3, SC70-3, UQFN-8 Voltage Reference  Voltage references  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
ADS8881 Download Download
OPA2333 Download Download
Download Download
Download Download
OPA313 Download
Download Download
REF3325 Download Download
Download Download
Download Download

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Technical Documents

See the Important Notice and Disclaimer covering reference designs and other TI resources.

User guides (1)
Title Type Size (KB) Date
PDF 1261 18 Jun 2013
Design files (3)
Title Type Size (KB) Date
ZIP 1962 20 Sep 2013
PDF 59 20 Sep 2013
PDF 109 20 Sep 2013
Related Tools & Software

Development Tools (1)

Name Part Number Tool Type
SPICE-based analog simulation program  TINA-TI  Circuit Design & Simulation 

Software (2)



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