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CN / EN
GH3220
GH3220 Block Diagram
Typical application for smart watches/wristbands
Typical application for ECG Patch

GH3220 is an ultra-low-power and ultra-high-precision heart rate sensor that integrates single-lead ECG and multichannel PPG sensing circuits. It monitors health indicators such as heart rate (HR), heart rate variability (HRV), peripheral capillary oxygen saturation (SpO2), and pulse wave translation time (PWTT). GH3220 is ideal for high-end smart watches, smart wristbands, ECG patches, professional sports gear, and medical devices.

GH3220 Block Diagram
Typical application for smart watches/wristbands
Typical application for ECG Patch

Key Features

  • Ultra-Low Power Consumption

    • Average current consumption in heart rate detection mode: 59 μA

    • Average current consumption in SpO2 detection mode: 230 μA

  • Ultra-high Performance

    • 24-bit highly accurate ADC

    • PPG dynamic range: up to 110 dB

    • Up to 256 μA configurable background light cancellation (BGC)

    • AC background light rejection (BGR) (50 Hz): 60 dB

    • DC background light rejection (BGR): 80 dB

    • ECG common-mode rejection ratio (CMRR): 100 dB

    • ECG input impedance > 2 G?, support dry electrode

    • Input noise meet YY-0885/IEC60601-2-47

  • Light Transmitter Block

    • Two 8-bit LED drivers: each supports 4 LEDs, total 8 LEDs

    • Each LED driver with 8-bit resolution and a maximum drive current of 200 mA

    • Supports 8 LEDs concurrently for SpO2 or multi-wavelength and multi-position heart rate detection

  • Light Receiver Block

    • 4 independent AFEs that support synchronous sampling, 75% reduction in LED lighting time in multi-channel applications

    • Up to 8 programmable sample time-slots, up to 32 effective channels for data acquisition

    • 4 PD interfaces for diff mode, and 8 PD interfaces for single-end mode

  • Build-in Functions

    • Automatic dimming

    • Automatic wrist (wearing) detection

    • Right leg drive (RLD) single-lead ECG sensing circuit

  • Internal FIFO

    • 800 * 4 bytes, caching 800 samples

  • Communication Interface

    • SPI: up to 12 MHz

    • IIC: up to 1 MHz

  • Package

    • WLCSP Package

    • Size: 2.605 mm * 2.905 mm * 0.468 mm, 0.4 mm pitch, 42 balls

  • Typical Applications

    • Heart Rate

    • ECG

    • PWTT

    • SpO2

    • HRV

    • Wrist (Wearing) Detection

Read More

Product Details

Part Number

GH3220

PPG TX

LED interface

8

Max LED Driving Current

200 mA * 2

PPG RX

AFE channels

4

PD interface

8 Single/ 4 Diff

Max SNR

110 dB

ECG

ECG channels

1

Input Impedance

2 GΩ

RTI noise

1.36 μVrms

Power Consumption

590 μA@500SPS

Interface

IIC/SPI

ADC

24-bit

FIFO

3.2k bytes

Package Type

WLCSP-42

Chip Size(mm)

2.6 * 2.9 * 0.46

Algorithm

HR, SpO2, HRV, ECG, Wear Detect

Hardware Resources

GH3x2x EVK

Used for the hardware verification and performance test for GH3020/GH3026/GH3220

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FPM02

Used for the module test and completed product test for all the health sensors

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Software & Tools

GH3x2x EVK PC Tool

This tool can be used to evaluate the performance of GH3x2x chip and generate the configuration of driver library
Read More

GH3x2x Algorithm Library

This algorithm library integrates the algorithm library of GH3x2x, including the measurement algorithm of basic physiological indicators (such as heart rate and blood oxygen)
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GH3x2x Driver Library

The driver library integrates the driver code and library functions of GH3x2x to help customers develop drivers and algorithms quickly
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GH3x2x Android APP Tool

This tool can be used for the optical path test and health function data collection of the whole machine
Read More

Documentation

Name Rights Description Version Date
GH3220_Datasheet Register Users Only Rev.1.4 2021-07-23
GHealth_User_Manual Nda Users Only Rev.1.2 2021-08-17
GH(M)3x2x EVK Hardware User Guide Nda Users Only Rev.1.0 2020-08-04
GH3220_6CH_ECG_Schematic Register Users Only Rev.1.0 2021-10-14
GH3220_6CH_ECG_Schematic_BOM Register Users Only Rev.1.0 2021-08-23
GH3220_Schematic_BOM Nda Users Only Rev.1.3 2021-03-26
GH3220_Schematic Register Users Only Rev.1.3 2021-03-19
GH3220(2.905X2.605X0.468)_POD Nda Users Only Rev.1.0 2022-07-16
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