Technical datasheet for the FM5811DNCXXA 5.8 GHz millimeter‑wave radar SOC with I2C interface and low‑power operation.
The FM5811DNCXXA is a 5.8 GHz millimeter‑wave radar sensor SOC designed for smart lighting, home automation and appliance control. It integrates a PLL, low‑noise amplifier, mixer and digital baseband, and can be configured via a standard I2C interface.
The document provides absolute maximum ratings, electrical characteristics, pin definitions, package options, I2C timing, application schematics and recommended component values for board designers. This manual is written in Chinese.
| Supply Voltage | 3.0 – 3.6 V |
|---|---|
| Output Power | -14 – -10 dBm |
| Operating Frequency Range | 5.725 – 5.875 GHz |
| Input Impedance | 16 Ω |
| Noise Figure | 9 – 16 dB |
| Startup Time | 25 – 30 µs |
| I2C Maximum Bit Rate | 400 kbit/s |
| Reference Clock | 25 MHz |
The I2C slave address is 0x1A.
The typical supply voltage is 3.3 V; if the voltage exceeds 3.5 V an external LDO is required.
The chip powers up in 25 to 30 µs.
It operates in the 5.8 GHz ISM band (5.725‑5.875 GHz).