Software-Configurable Cardiac Pacemaker Detection Module Reference Design


Design files


This reference design implements a compact hardware-based circuit to detect the pacemaker pulse during ECG measurement. It provides indication of valid pace signal through a flag and onboard LED. This design enables the user to configure various parameters of the pace signal (amplitude, rise time, pulse duration, polarity) with software using an onboard DAC. The measured values can be read through an onboard ADC. The Pace signal is extracted, amplified, and conditioned from the noisy ECG signal on the board. It adds the Pace detection feature while used in conjunction with TI’s ADS129X series of devices.

  • Programmable thresholds for detecting : rise time (30 μs to 200 μs), amplitude (8 mV to 700 mV), duration (0.1 μs to 2000 μs) and polarity of pace pulse
  • Availability of measured parameters and conditioned pace signal on I2C bus for further analysis and processing conditioned pace signal on I2C bus for further analysis and processing
  • Interface with TI’s ADS129X series of ECG front-end devices
  • Enables identification of various types of pacemaker signals
  • Compact form factor (29 mm × 35 mm)
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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.

TIDUE99.PDF (15136 K)

Reference design overview and verified performance test data

TIDRX45.PDF (606 K)

Detailed schematic diagram for design layout and components

TIDRX46.PDF (298 K)

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

TIDRX47.PDF (289 K)

Detailed overview of design layout for component placement

TIDRX49.ZIP (1936 K)

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


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

TIDRX48.PDF (1479 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

AND gates

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Analog switches & muxes

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General-purpose op amps

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Instrumentation amplifiers

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Inverting buffers & drivers

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Precision ADCs

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Precision DACs (≤10 MSPS)

DAC55788-bit, Octal Channel, Ultra-Low Glitch, Voltage Output, 2-Wire Interface DAC

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Series voltage references

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Technical documentation

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Type Title Date
* Design guide Software-Configurable Cardiac Pacemaker Detection Module Reference Design Sep. 18, 2018
Technical article Designing compact, efficient and high performing multiparameter patient monitors Jun. 25, 2019

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