ECG measurement AD8232 pulse cardia cardiac ECG kit

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Extract code: 1234

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AD8232 sensor module

Single -guided linked heart rate monitoring front end

AD8232 is an integrated front end, suitable
No. condition to perform heart rate monitoring.

An integrated signal conditioning module for ECG and other biological electricity measurement applications.The device is designed to extract, enlarge and filter a weak biological electrical signal with noise generated by motion or remote electrodes.The design allows ultra -low power modulus converters (ADC) or embedded micro -controllers to easily collect output signals.

AD8232 uses a bipolar high -pass filter to eliminate pseudo -pseudo -image and electrode semi -battery potential.The filter and the instrument amplifier structure is tightly coupling, which can achieve a single -level high -gain and high -pass filtering, thereby saving space and cost.

AD8232 uses an unused computing amplifier to create a triode low -pass filter to eliminate 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 co -mode inhibitory performance of the frequency of the system line and other adverse interference, AD8232 has a built -in amplifier for the use of the drive (RLD) such as the right side.

AD8232 contains a fast recovery function, which can reduce the long -tail phenomenon of high -pass filter.If the amplifier's orbit voltage occurs, the signal mutation (such as the detachment of the leader), the AD8232 will automatically adjust to a higher filter cut -off state.This function allows AD8232 to achieve rapid recovery, so it can obtain effective measurement values ​​as soon as possible after the electrode connected to the measurement object.

The rated temperature range of the guarantee performance is 0 ° C to 70 ° C, and the operating temperature range is -40 ° C to +85 ° C.

application

Fitness and exercise heart rate monitoring

Portable ECG

Remote health monitoring

Game peripheral equipment

Biological telecommunications signal collection

Point number pin name description
1 HPDRIVE Qualcomm drive output.HPDRive should be connected to the capacitance in the first high -pass filter.
AD8232 drives this pin to keep HPSense at the same level as the reference voltage.
2 +IN instrument amplifier is input.+In usually connect to the left arm (LA) electrode.
3 −In instrument amplifier negative input.In is usually connected to the right arm (RA) electrode.
4 RLDFB right leg driver feedback input.RLDFB is a feedback pin for the right leg drive circuit.
5 RLD Right leg drive output.The drive electrode (usually the right leg) should be connected to the RLD pin.
6 SW quickly restore the switch to the feet.This pin should be connected to the output end of the second high -pass filter.
7 OPAMP+ computing amplifier input end.
8 Refout reference voltage buffer output.The output of the instrument amplifier refers to this potential.
Refout should be used as a virtual land that needs to reference signals in the circuit.
9 OPAMP 放 Computing amplifier Input end.
10 OUT computing amplifier output end.This output terminal provides a full -conditioned heart rate signal.
OUT can be connected to the input terminal of ADC.
11 LOD联 leader off the output end of the comparator.In the DC leader off the detection mode, when connecting to the −In electrode,
LOD− is in a high level, otherwise it is in a low level.In the mode of communication, LOD− is always in a low level.
Director of the output of the leader of the leader.In the DC leader off the detection mode, when the+IN electrode is turned on and connected, the LOD+is in a high level.
Conversely, in a low level.In the mode of communication leader, when the −in or+in electrode is turned on and connected, the LOD+is in a high level.
These two electrodes are in a low level when they are connected.
12 LOD+
13 SDN Blind the control input end.Drive the SDN to a low level and enter the low power consumption interruption mode.
14 AC/DC Director's drop mode controls the input terminal.For the DC leader off, the AC/DC pin should be driven to the low level.
For the exchanges, the AC/DC pin should be driven to the high level.
15 FR quickly restore the control input terminal.The high level of the FR driver can enable the mode to recover quickly; otherwise, it should drive it to a low level.
16 GND power supply.
17 +VS power pins.
18 Refin reference voltage buffer input.Refin (high impedance input pin) can be used to set the level of the reference voltage cusher.
19 IAOUT meter amplifier output pins.
20 HPSENSE instruments of Qualcomm detection input.
The HPSENSE should be connected to the R and C nodes of the turning frequency of the direct circuit.
EP naked pad.Naked pads should be connected to GND or kept non -connected.