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GH3026T
GH3026T

GH3026T is an ultra-low-power and ultra-high-precision analog front end that integrates multi-channel PPG, and triple-channel temperature sensing circuits. It monitors health indicators such as heart rate (HR), heart rate variability (HRV), peripheral capillary oxygen saturation (SpO2), and temperature. GH3026T is ideal for high-end smart watches, smart wristbands, professional sports gear, and medical devices.

GH3026T

Key Features

  • Ultra-Low Power Consumption

    • PPG typical power consumption: 40 µA @ 2 ADCs * 2 Slots, 39 µs, 25 Hz, 1st-order Background Light Rejection (BGR)

    • PPG typical power consumption: 110 µA @ 2 ADCs * 2 Slots, 39 µs, 100 Hz, 1st-order BGR

    • Temp typical power consumption:19 µA @ 1 ADCs*1 Slot,39 µs,5 Hz

  • Ultra-High Performance

    • 24-bit highly accurate ADC

    • PPG dynamic range: up to 110 dB

    • Up to 256 µA Configurable Background Light Cancellation (BGC)

    • Up to 256 µA Configurable DC offset cancellation

    • AC Background Light Rejection (BGR) (50 Hz): 60 dB

    • DC Background Light Rejection (BGR): 80 dB

  • Temperature Sensing Module

    • Single-channel sampling AFE supporting multiplexing

    • 3 NTC temperature sampling channels and 1 ref resistance sampling channel

    • Temperature sensing range and deviation: 25 °C ≤ Temp. < 45 °C: ±0.1 °C

  • Light Transmitter Block

    • Two LED drivers embedded; each supports 4 LEDs

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

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

    • Up to 8 programmable Lighting time-slots

    • PSRR:95 dB

  • Light Receiver Block

    • Two independent AFEs that support synchronous sampling

    • Up to 8 programmable sample time-slots, up to 16 effective channels for data acquisition

    • 8 built-in Decimation/Moving Average units

    • 4 PD interfaces

    • Maximum junction capacitance of PD: 400 pF

    • Configurable TIA gain: 10 kΩ to 2 MΩ

  • Build-in Functions

    • Automatic Dimming

    • Automatic Wrist (Wearing) Detection

  • Internal FIFO

    • 800 * 4 bytes, caching 800 samples

  • Communication Interface

    • SPI: Up to 12 MHz

    • IIC: Up to 1 MHz

  • Critical Electrical Characteristics

    • AVDD: 2.0 V - 3.6 V

    • VDDIO: 1.62 V - 3.6 V

    • Operating temperature: -30 °C - 85 °C

  • Package

    • WLCSP package

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

  • Typical Applications Supported

    • Heart Rate

    • SpO2

    • HRV

    • Wrist (Wearing) Detection

    • Temperature measurement

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Product Details

Part Number

GH3026T

PPG TX

LED interface

8

Max LED Driving Current

200 mA * 2

PPG RX

AFE channels

2

PD interface

8 Single/4 Diff

Max SNR

110 dB

Temperature

NTC interface

4

Temperature measurement accuracy

±0.1 °C@25 °C ~ 45 °C

Interface

IIC/SPI

ADC

24-bit

FIFO

3.2 k bytes

Package Type

WLCSP-42

Chip Size (mm)

2.6 * 2.9 * 0.46

Algorithm

HR, SpO2, HRV, Wear Detect

Hardware Resources

GH3x2xT EVK

An evaluate kit based on GH3020T/GH3026T which is designed for hardware verify and performance test.

Read More

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)
Read More

GH3x2x Driver Library

The driver library integrates the driver code and library functions of GH3x2x to help customers develop drivers and algorithms quickly
Read More

GH3x2x Android APP Tool

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

Name Rights Description Version Date
GH3026T_Datasheet Register Users Only Rev.1.0 2022-11-23
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
GH3026T_Schematic_BOM Nda Users Only Rev.1.0 2023-07-13
GH3026T_Schematic Register Users Only Rev.1.0 2022-11-22
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