SPECIFICATIONS

Application: standard

Brand Name: PENGHEKEJI

Choice: yes

Condition: New

Dissipation Power: standard

Hign-concerned Chemical: None

Model Number: AD8232

Operating Temperature: standard

Origin: Mainland China

Supply Voltage: standard

Type: Module

is_customized: Yes

AD8232 Sensor Module Single-Lead Heart Rate Monitoring Front End The AD8232 is an integrated front-end for signal conditioning of cardiac bioelectric signals for heart rate monitoring. The AD8232 is an integrated front-end for signal conditioning of cardiac bioelectric signals for heart rate monitoring. An integrated signal conditioning module for ECG and other bioelectric measurement applications. The device is designed to extract, amplify and filter weak bioelectrical signals in the presence of noise from motion or remote electrode placement. The design enables easy acquisition of the output signal by an ultra-low-power analog-to-digital converter (ADC) or embedded microcontroller. The AD8232 utilizes a bipolar high-pass filter to eliminate motion artifacts and electrode half-cell potentials. The filter is tightly coupled to the instrumentation amplifier structure, enabling single-stage high-gain and high-pass filtering, resulting in space and cost savings. The AD8232 uses an unused constrained op-amp to create a three-pole low-pass filter that eliminates additional noise. Users can select the cutoff frequency of all filters to meet the needs of different types of applications. To improve common-mode rejection of system line frequencies and other undesirable interference, the AD8232 has a built-in amplifier for use in driven-lead applications such as right-hand drive (RLD).
The AD8232 includes a fast recovery feature that reduces the otherwise long build-up long-tail phenomenon of high-pass filters. If a sudden signal change occurs in the amplifier rail voltage (such as a lead disengagement situation), the AD8232 will automatically adjust to a higher filter cutoff. This feature allows the AD8232 to achieve fast recovery and thus obtain a valid measurement as soon as possible after the leads are connected to the electrodes of the measurement object.
Performance is guaranteed over a rated temperature range of 0 C to 70 C and an operating temperature range of -40 C to +85 C. The AD8232 is also available in a wide range of temperatures.

Applications
Fitness and Sports Heart Rate Monitoring Portable ECG Remote Health Monitoring Gaming Peripherals Bioelectric Signal Acquisition Pin No. Pin Name Description

1 HPDRIVE High-pass driver output. The HPDRIVE should be connected to the capacitor in the first high pass filter.

The AD8232 drives this pin to keep HPSENSE at the same level as the reference voltage.

2 +IN Instrumentation amplifier positive input. +IN is normally connected to the left arm (LA) electrode.

3 -IN Negative instrumentation amplifier input. -IN is normally connected to the right arm (RA) electrode.

4 RLDFB Right leg drive feedback input.RLDFB is the 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 Fast recovery switch pin. This pin should be connected to the output of the second high-pass filter.

7 OPAMP+ Operational amplifier in-phase input.

8 REFOUT Reference voltage buffer output. The instrumentation amplifier output is referenced to this potential.

REFOUT should be used as a virtual ground for any point in the circuit where a reference signal is required.

9 OPAMP- Operational amplifier inverting input.

10 OUT Operational amplifier output. This output provides a fully conditioned heart rate signal.

OUT can be connected to the input of the ADC.

11 LOD- Lead-off comparator output. In DC lead-off detection mode, when disconnected from the -IN electrode, LOD- goes high.

LOD- is in a high state and vice versa. In AC lead-off detection mode, LOD- is always low.

Lead-off comparator output. In DC lead-off detection mode, LOD+ is in a high state when the +IN electrode is disconnected, and

Conversely, it is low. In AC lead-off detection mode, LOD+ goes high when the -IN or +IN electrode is disconnected and low when both electrodes are connected.

When both electrodes are connected, it is low.

12 LOD+

13 SDN OFF control input. Drive SDN low to enter low-power shutdown mode.

14 AC/DC lead-off mode control input. For DC lead-off mode, the AC/DC pin should be driven low.

For AC lead-off mode, the AC/DC pin should be driven high.

15 FR Fast Recovery Control Input. Driving FR high enables fast recovery mode; otherwise, it should be driven low.

16 GND Power ground.

17 +VS Power supply pin.

18 REFIN Reference voltage buffer input.REFIN (high impedance input pin) can be used to set the level of the reference voltage buffer.

19 IAOUT Instrumentation amplifier output pin.

20 HPSENSE High-pass detection input for the instrumentation amplifier.

HPSENSE should be connected to the R & C junction that sets the turn frequency of the isolation circuit.

EP Exposed Pad. Exposed pads should be connected to GND or left unconnected.