Data Acquisition Block for ECG Systems, discrete LEAD I ECG implementation Reference Design


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Key Document


This TI Verified Design is for Electrocardiography (ECG), the measurement of the electrical activity of the heart, a method that requires a precision analog front end instrumentation gain stage, filtering, and high resolution digital conversion. This design features the methodology for achieving a LEAD I ECG measurement system designed from discrete analog components. Ultra low power is optimized by an instrumentation front end using an OPA2333 and is digitized by the 18 bit ADS8881.

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  • 18 Bit, 10ksps Sampling Rate
  • 200Hz ECG Signals
  • Optimization: ECG
  • Power: 1.5mW @ AVDD = 3.3V
  • Utilizes ADS8881 (18bit, 1Msps SAR ADC), OPA2333 (Input/INA), OPA313 + REF3330 (Reference)

      This Verified Design Includes:

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


TI Devices (4)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
ADS8881  18-Bit, 1-MSPS, Serial Interface, microPower, Truly-Differential Input, SAR ADC  Analog to Digital Converter  Sample & Buy View Design Kits & Evaluation Modules
OPA2333  1.8V, 17µA, microPower, Precision, Zero Drift CMOS Op Amp  Operational Amplifier (Op Amp)  Sample & Buy View Design Kits & Evaluation Modules
OPA313  1-MHz, Micropower, Low-Noise, Rail-to-Rail I/O 1.8-V Operational Amplifier  Operational Amplifier (Op Amp)  Sample & Buy View Design Kits & Evaluation Modules
REF3330  30ppm/C Drift, 3.9uA, SOT23-3, SC70-3 Voltage Reference  Voltage Reference  Sample & Buy Not Available

Technical Documents
User Guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 1222 18 Jun 2013 330
Design Files (3)
Title Abstract Type Size (KB) Date Views
ZIP 1295 20 Sep 2013 70
PDF 78 20 Sep 2013 134
PDF 102 20 Sep 2013 307
More Literature (1)
Title Abstract Type Size (KB) Date Views
PDF 743 13 Jan 2015 223
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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