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Modulo AD8232 Sensore Elettrocardiografo ECG Keyes- SparkFun compatibile

per Arduino o altre schede/ Processori

INCLUSI CAVETTI E PADS

AD8232 Heart Rate ECG Monitor Sensor SparkFun compatible module

Pads and Cable included!

PADS set di ricambio li trovi qui: >> https://www.ebay.it/itm/114808698873 <<

(Contatta il venditore per annullare il costo di spedizione dei PADS)

(A seconda dei lotti i PADS possono diventare tondi e i CAVETTI colorati anzichè bianchi)

( Note: Some changes may be present as shape of PADS or PCB color but electronic circuit is exactly the same)

(A seconda dei lotti la scheda può variare leggermente rispetto all'immagine o presentare piccole variazioni nel montaggio dei componenti o colore del circuito stampato o serigrafia ma non varia nelle dimensioni o caratteristiche tecniche)

Il modulo può essere utilizzato come cardiofrequenzimetro per misurare l'attività elettrica del cuore. Questa attività

elettrica può essere tracciata come un ECG o elettrocardiogramma ( l'uscita è una lettura analogica). Il chip AD8232 Heart Rate Monitor agisce come un amplificatore operazionale per aiutare ottenere un segnale chiaro e leggibile.

È stato progettato per estrarre, amplificare e filtrare piccoli segnali biopotenziali in presenza di condizioni di rumore, come quelli creati dal movimento o posizionamento degli elettrodi .

I segnali di iterfacciamento verso una scheda ( es. Arduino) sono : SDN, LO +, LO-, USCITA, 3.3V, GND.

I segnali verso la persona sono: RA (braccio destro), LA (braccio sinistro), RL (gamba destra). Inoltre, vi è un indicatore LED che pulsa al ritmo di un battito cardiaco rilevato. Nota: Questo prodotto non è un dispositivo medico e non è destinato ad essere utilizzato come tale o come accessorio a tale né diagnosticare o trattare qualsiasi condizione.

• Tensione alimentazione : 3.3V
• Uscita : Analogica
• Rilevamento sensori staccati.
• Shutdown Pin
• Indicatore LED battito
• Interfaccia sensori ( RA, LA, RL) su 3PIN 2.54 pin header o su 3.5mm Jack
• Misure: 36mm * 31mm * 18mm
• Temp. Lavoro : -40 ℃ — +85 ℃
• Peso confezione: 45 gr

LINK AL DOCUMENTO della applicazione: http://digilander.libero.it/olmste/SENSORI/MD0339%20KEYES%20CARDIO%20%20AD8232.pdf

English

Applications:
Fitness and exercise heart rate monitoring
Portable ECG
Remote health monitoring
Game peripherals
Bio electrical signal acquisition

Features:

Operating Voltage : 3.3V

Analog Output

Leads-Off Detection

Shutdown Pin

LED Indicator

Interface(connecting RA LA RL) 3PIN 2.54 pin header or

3.5mm earphone Jack for Biomedical Pad Connection

Size: 36mm * 31mm * 18mm

Working Temperature: -40 ℃ — +85 ℃

The AD8232 SparkFun compatible Lead Heart Rate Monitor is 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 biopotential measurement applications. It is designed to extract, amplify, and filter small biopotential signals in the presence of noisy conditions, such as those created by motion or remote electrode placement.

The AD8232 Heart Rate Monitor breaks out nine connections from the IC that you can solder pins, wires, or other connectors to. SDN, LO+, LO-, OUTPUT, 3.3V, GND provide essential pins for operating this monitor with an Arduino or other development board. Also provided on this board are RA (Right Arm), LA (Left Arm), and RL (Right Leg) pins to attach and use your own custom sensors. Additionally, there is an LED indicator light that will pulsate to the rhythm of a heart beat. Biomedical Sensor Pads and Sensor Cable are required to use the heart monitor.

Note: This product is NOT a medical device and is not intended to be used as such or as an accessory to such nor diagnose or treat any conditions.

Original Sparkfun Documents / Reference Links :

Schematic

Eagle Files

Hookup Guide

Datasheet (AD8232)

GitHub (Design Files & Example Code)

Product Video

Specifications:
1.Single lead heart rate monitor
2.AD8232 is an integrated front end, applicable to the heart of the biological electrical signal to carry out a letter
3.The number of conditioning to carry out heart rate monitoring.
4.Ensure the performance of the rated temperature range of 0 to 70 degrees C, the operating temperature range of -40 to +85.
5.I.C. Compatible

How it works:
* An integrated signal conditioning module for ECG and other bio electrical measurement applications. The device is designed to extract, amplify and filter weak biological electrical signals in the case of noise generated by moving or remote electrode placement. The design enables ultra low power analog-to-digital converter (ADC) or embedded microcontroller to easily capture the output signal.
* AD8232 using bipolar point high pass filter to eliminate motion artifacts and electrode half cell potential. The filter is tightly coupled with the instrument amplifier structure, which can realize the single stage high gain and high pass filter, thus saving the space and the cost.
* AD8232 uses a non operational amplifier to create a three pole low pass filter, eliminating the additional noise. Users can meet the needs of different types of applications by selecting the cut-off frequency of all filters.
In order to improve the system circuit frequency and other undesirable interference of the common mode rejection performance, AD8232 built in an amplifier for the right side driver (RLD) and other drive lead applications.
* AD8232 contains a fast recovery function, you can reduce the long high pass filter to establish the long tail phenomenon. If the amplifier rail voltage signal mutation (such as the lead out of the case), AD8232 will automatically adjust to a higher filter cutoff state. This feature allows the AD8232 to achieve rapid recovery, and thus the lead connection to the measurement of the object can be achieved as soon as possible after the measurement of the value.


Pin number pin name Description
1 HPDRIVE high pass driver output. The capacitor should be connected to the first high pass filter in HPDRIVE.
AD8232 driver this pin to keep the HPSENSE at the same level as the reference voltage.
2 +IN instrumentation amplifier positive input. +IN is usually connected to the left arm (LA) electrode.
3 - IN instrumentation amplifier negative input. - IN is usually connected to the right arm (RA) electrode.
4 RLDFB right leg driver feedback input. RLDFB is the right leg driver circuit feedback pin.
5 RLD right leg driver output. The drive electrodes (usually for the right leg) should be connected to the RLD pin.
6 SW fast recovery switch pin. This pin should be connected to the output of the second high pass filter.
7 OPAMP+ op amp inverting input.
8 REFOUT reference voltage buffer output. Instrument amplifier output reference this potential.
REFOUT should be used as a virtual ground for any point in a circuit that requires a reference signal.
9 - OPAMP operational amplifier inverting input.
10 OUT op amp output. This output provides a fully conditioned heart rate signal.
OUT can be connected to the input side of the ADC.
11 LOD - lead off output end of the comparator. Fall detection mode in DC lead, and when the IN electrode is disconnected,
LOD - in the high state, otherwise it is in a low state. In the exchange of lead off detection mode, LOD is always in the low state.
Lead off comparator output. In the DC lead off detection mode, when the +IN electrode is disconnected, the LOD+ is in a high level,
On the contrary, it is in a low level state. In the exchange of lead off detection mode, and when the IN or +IN electrode is disconnected, LOD+ is in a high level state,
When these two electrodes are connected, they are in a low level state.
12 LOD+
13 SDN shutdown control input. Driving the SDN to a low level, which can be turned into a low power shutdown mode.
14 AC/DC lead off mode control input. For DC lead off mode, the AC/DC pin should be driven to a low level.
For the AC lead off mode, the AC/DC pin should be driven to the highest level.
15 FR fast recovery control input. FR drive to the high level can be fast recovery mode; otherwise, it should be driven to a low level.
16 GND power supply.
17 +VS supply pin.
18 REFIN reference voltage buffer input. REFIN (high impedance input pins) can be used to set the level of the reference voltage buffers.
19 IAOUT instrumentation amplifier output pin.
20 HPSENSE instrumentation amplifier for high pass detection input.
HPSENSE is connected to the R and C nodes that are set at the turn frequency of the DC blocking circuit.
EP exposed pad. The exposed pad should be GND or not connected