Hardware Pace Detection for ECG Reference Design


Design files


This verified design outlines a hardware pace detection solution for ECG using slope detection. The circuit is designed to work smoothly with the ADS1298 through the PACEOUT pins from the ADC directly feeding the input of the pace detection circuit. When a pace signal is detected, the output from the circuit is designed to latch a logic signal high to be read from a GPIO.

  • Monitors for Signal from Pacemaker using slope detection
  • Outputs and latches an logic pin which can be monitored using a GPIO
  • Single Supply Solution
  • Designed to mate with ADS1298ECG-FE board
This Verified Design Includes
  • Theory
  • Component Selection
  • TINA-TI Simulation
  • Schematics and PCB Layout
  • Verification and Measured Performance
  • Modification Options
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

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

TIDR195.PDF (161 K)

Detailed schematic diagram for design layout and components

SLAC581.ZIP (883 K)

Detailed schematic diagram for design layout and components

TIDR196.PDF (70 K)

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

TIDC150.ZIP (746 K)

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


Includes TI products in the design and potential alternatives.

Biosensing AFEs

ADS12988-Channel 24-bit ADC With Integrated ECG Front End

Data sheet: PDF | HTML

TLV3401Single nano power high-voltage comparator with open-drain output

Data sheet: PDF | HTML
General-purpose op amps

OPA348Single, 5.5-V, 1-MHz, low quiescent current (45-μA), RRIO operational amplifier

Data sheet: PDF
NAND gates

SN74LVC2G002-ch, 2-input, 1.65-V to 5.5-V NAND gates

Data sheet: PDF | HTML

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Technical documentation

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Type Title Date
* User guide TIPD111 Verified Design Reference Guide Jun. 18, 2013

Related design resources

Design tools & simulation

TINA-TI SPICE-based analog simulation program

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