Cjmcu-8232 Ad8232 Ecg Measurement Module

Product Description

Cjmcu-8232 Ad8232 Ecg Measurement Module

CJMCU-8232 sensor module

Heart rate monitors single-lead front-end

AD8232 is an integrated front end for biological electrical signal to the heart of faith
Number conditioning for heart rate monitoring.

A tool for ECG and other bio-electrical measurement applications integrated signal conditioning modules. The device is designed for use in circumstances in which movement or remote electrode placement of noise generated by the extraction, amplification and filtering the weak bioelectric signals. This design makes the ultra-low power ADC (ADC) or embedded microcontroller can easily capture the output signal.

AD8232 bipolar high-pass filter to eliminate motion artifacts and electrode half-cell potential. The filter is tightly coupled with the instrumentation amplifier architecture, enabling a single-stage high gain and high-pass filter, thereby saving space and cost.

AD8232 uses a constraint-free use of the operational amplifier to create a three-pole low-pass filter to eliminate extra noise. Users can select the filter cut-off frequency to meet the needs of all different types of applications.

To improve system line frequency interference and other adverse CMRR performance, AD8232 built an amplifier for the right drive (RLD) and other applications that drive leads.

AD8232 contains a quick recovery, high-pass filter can reduce longer had established long tail phenomenon. If the amplifier rail voltage signal mutation occurs (such as lead from the case), AD8232 will automatically adjust to a higher filter cutoff state. This feature allows the AD8232 can achieve rapid recovery, and thus after the electrode leads connected to the measurement object can be made effective as soon as the measured value.

Ensure the performance of the rated temperature range of 0 ? to 70 ?, operating temperature range of -40 ? to +85 ?.

Application

Fitness and exercise heart rate monitoring
Portable ECG
Remote health care
Gaming peripherals
Biological signal acquisition
Pin No. Name Description
1 HPDRIVE Qualcomm drive output. HPDRIVE should be connected to the first high-pass filter capacitance.
AD8232 driving the pin to keep HPSENSE with the reference voltage at the same level.
2 + IN-amp positive input. + IN is usually connected to the left arm (LA) electrode.
3 -IN-amp negative input. -IN Typically connected to the right arm (RA) electrode.
4 RLDFB right leg drive feedback input. RLDFB feedback pin right leg drive circuit.
5 RLD right leg drive output. It should drive electrode (usually the right leg) is connected to the RLD pin.
6 SW Switch pin fast recovery. The pin should be connected to the output of the second high-pass filter.
7 OPAMP + op-amp input.
8 REFOUT reference buffer output. Instrumentation amplifier output refer to this potential.
REFOUT should be used as a circuit in the need to refer to any point of the signal virtually.
9 OPAMP- operational amplifier inverting input.
10 OUT of the operational amplifier output. This output providing a fully conditioned heart rate signal.
OUT may be connected to the input of the ADC.
11 LOD- lead off the comparator output. DC leads off detection mode, when disconnected from the -IN electrode,
LOD- in the high state, and vice versa in a low state. In exchange leads off detection mode, LOD- always in a low state.
Lead-off the output of the comparator. DC leads off detection mode, when the + IN electrode is disconnected, LOD + in the high state,
And vice versa in a low state. In exchange leads off detection mode, when -IN or + IN electrode is disconnected, LOD + in the high state,
Then in a low state when the two electrodes are connected.
12 LOD +
13 SDN shutdown control input. The SDN driven low, you can enter a low-power shutdown mode.
14 AC / DC lead-off mode control input. For DC lead-off mode, should AC / DC pin is driven low.
For AC lead-off mode, should AC / DC pin is driven high.
15 FR Fast Recovery control input. The FR-driven to high enables the rapid recovery mode; otherwise, it should be driven low.
16 GND Power Ground.
17 + VS supply pin.
18 REFIN reference buffer input. REFIN (high-impedance input pins) can be used to set the reference voltage buffer level.
19 IAOUT instrumentation amplifier output pin.
Qualcomm detection input 20 HPSENSE instrumentation amplifier.