Building an ECG Monitor: Op-Amp Recommendations and Tips | Forum Discussion

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SUMMARY

This discussion focuses on building an ECG monitor, specifically seeking recommendations for operational amplifiers (op-amps). The user mentions TI's INA122 and INA332 as expensive and hard to source. Key specifications for op-amps in ECG applications include Common Mode Rejection Ratio (CMRR), Power Supply Rejection Ratio (PSRR), input impedance, and voltage characteristics. The conversation emphasizes the importance of these specifications in selecting suitable op-amps for ECG monitoring.

PREREQUISITES
  • Understanding of operational amplifier specifications such as CMRR and PSRR.
  • Familiarity with ECG monitoring requirements and design principles.
  • Knowledge of component sourcing and pricing strategies.
  • Basic electronics skills for circuit design and assembly.
NEXT STEPS
  • Research alternative op-amps suitable for ECG applications, focusing on cost-effective options.
  • Learn about the specifications required for op-amps in medical devices, particularly CMRR and PSRR.
  • Explore component sourcing strategies to find affordable electronic components.
  • Investigate circuit design techniques specific to ECG monitoring systems.
USEFUL FOR

Electronics hobbyists, biomedical engineers, and anyone interested in building ECG monitoring devices will benefit from this discussion.

temujin
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Dear Forum,

I would like to build my own ECG monitor.
Does anyone have experience building one?

Especially I am looking for recommendations on which op amps I can use. The ones I have found, like TI's ina122, ina 332 are both rather expensive (like 10 euro per piece) and hard tu find through the regular distributors.


regards
t.
 
Engineering news on Phys.org
What are the specs that you are looking for from your opamp components? What CMRR and PSRR? What input impedance and input output voltage characteristics? What are you going to use for supplies?
 

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