AD8232 KEYES Single Lead Heart Rate Monitor
AD8232 overview
The AD8232 Single Lead Heart Rate Monitor is a cost-effective board used to measure the electrical activity of the heart. This electrical activity can be charted as an ECG or Electrocardiogram and output as an analog reading. ECGs can be extremely noisy, the AD8232 Single Lead Heart Rate Monitor acts as an op amp to help obtain a clear signal from the PR and QT Intervals easily.
The AD8232 is an integrated signal conditioning block for ECG and other bio-potential measurement applications. It is designed to extract, amplify, and filter small bio-potential signals in the presence of noisy conditions, such as those created by motion or remote electrode placement
Key specifications
Low supply current
170 µA (typical)
Common-mode rejection ratio
80 dB (dc to 60 Hz)
Datasheet
ad8232.pdf
Format PDFSize 670 KBLanguage ENRevision Rev. D
Third-party / unverified source
AD8232 features
- Operating Voltage – 3.3V Analog Output Leads-Off Detection Shutdown Pin LED Indicator 3.5mm Jack for Biomedical Pad Connection
- Two or three electrode configurations
- Rail-to-rail output
- Internal RFI filter
- 8 kV HBM ESD rating
AD8232 pinout
| Name | Description |
|---|---|
| GND | Power Supply Ground |
| 3.3v | Power Supply 3.3v |
| Output (ADC) | Operational Amplifier Output. The fully conditioned heart rate signal is present at this output. OUT can be connected to the input of an ADC. |
| LO- | Leads Off Comparator Output. In dc leads-off detection mode, LO− is high when the electrode to −IN is disconnected, and it is low when connected |
| LO+ | Leads Off Comparator Output. In dc leads detection mode, LOD+ is high when the +IN electrode is disconnected, and it is low when connected |
| SDN | Shutdown Control Input. Drive SDN low to enter the low-power shutdown mode. |
| RA (Right Arm) | RED Biomedical electrode pad RA(input). Instrumentation Amplifier Negative Input. −IN is typically connected to the right arm (RA) electrode |
| LA (Left Arm) | YELLOW Biomedical electrode pad LA(input). Instrumentation Amplifier Positive Input. +IN is typically connected to the left arm (LA) electrode |
| RL(Right Leg) | GREEN Biomedical electrode pad RL(input). Right Leg Drive Output. Connect the driven electrode (typically, right leg) to the RLD pin. |
| 3.5mm ECG Biomedical Electrode Connector Jack | Combine Biomedical Electrode pad Connector of RA, LA, RL |
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