Product parameters
Wide voltage input of :4.5V-36V DC (step-down to 3.3V through module LDO)
of logic level of :3.3V( compatible with 5V TTL, I²C pin withstand voltage 5V)
measurement range of :± 8 Gauss (full range of three-axis magnetic field)
resolution :0.1 mGa(16-bit ADC,0.1 ° heading angle accuracy)
accuracy:
Heading angle: ± 1 ° (typical value, no external magnetic field interference)
Sensitivity error: ± 3% (full temperature compensation)
of communication interface: I²C(400 kHz, address 0x1E fixed)
power consumption :
Working mode: 1.0 mA (continuous measurement)
Sleep mode: 0.1 μA
response time of :8 ms (single measurement mode)
operating temperature :-40°C to +85°C (industrial wide temperature range)
Anti-interference ability of : built-in self-degaussing circuit (SET/RESET drive)

Product main pin function
Vin: DC input positive (4.5V-36V DC), connected to wide voltage power supply positive (module built-in AMS1117-3.3V step-down)
GND: power ground, common ground with system
VCC: 3.3V logic power supply output to power external MCU (maximum current 150mA)
SCL :I²C clock line, external 4.7kΩ pull-up resistor to 3.3V/5V
SDA :I²C data line, 4.7kΩ pull-up resistor needs to be externally connected
DRDY: data ready interrupt output
SA0: I²C Address Select Pin (HMC5883L only):
Address 0x1E when grounded
Address 0x1F when connected to VCC
SET/RESET : self-degaussing drive pin