The GH300 is an ultra‑small, low‑power heart‑rate sensor module with integrated LEDs, photodiode and AFE for earbuds, rings and other wearables.
The GH300 heart‑rate sensor module integrates two LEDs, a photodiode (PD) and a 24‑bit ADC AFE in a 4.3 × 2.6 mm LGA package, delivering ultra‑low power consumption (as low as 3 µA in sleep mode) for space‑constrained wearable devices. It supports I²C communication, multiple operating modes, and optional external LED/PD connections.
The datasheet provides detailed technical specifications, pin definitions, power‑management and reset timing, I²C protocol details, package information, moisture‑sensitivity rating, SMT design guidelines, legal notices and revision history, helping designers integrate the GH300 into their products. This manual is written in Chinese.
| Package size | 4.3 × 2.6 mm |
|---|---|
| Chip thickness | 0.90 mm |
| Sleep mode current | 3 µA (typical) |
| Average working current (no LED) | 25 µA @ 25 Hz |
| Supply voltage (VCC) | 2.1 V ~ 3.3 V |
| LED supply voltage | 2.5 V ~ 4.5 V |
| Measurement range | 30 ~ 200 BPM |
The GH300 consumes about 3 µA in sleep mode.
The module uses an I²C (IIC) interface for register and FIFO access.
It is packaged in an LGA package measuring 4.3 mm × 2.6 mm.
The device operates from 2.1 V to 3.3 V on VCC.