Product parameters
operating voltage :1.71V-3.6V DC( prohibit 5V input , need external LDO conversion)
Pressure measurement range of :300-1100 hPa (corresponding altitude:-500m to 9000m)
Temperature measurement range of :-40°C to +85°C (industrial wide temperature range)
Absolute accuracy of :± 1 hPa(950-1050 hPa, 0-40°C)
Relative accuracy of :± 0.12 hPa (equivalent to ± 1 m height resolution)
power consumption :
Operating mode: 2.7 μA(1Hz sampling rate)
Sleep mode: 0.1 μA
communication interface :I²C (up to 3.4 MHz) / SPI (4-wire/3-wire, up to 10 MHz)
output resolution:
Pressure: 16-20 bits (programmable oversampling)
Temperature: 16 bit

Product main pin function
VDD of: power supply positive pole (1.71V-3.6V DC), 0.1μF decoupling capacitor shall be connected in parallel, and shall not be connected to 5V
GND: power ground, common ground with the system to reduce noise interference
SCL :I²C clock line/SPI clock line (SCK), requiring an external 4.7kΩ pull-up resistor to VDD
SDA :I²C data line/SPI data input (SDI), external 4.7kΩ pull-up resistor is required
CSB: Interface Mode Selection:
Enable SPI mode when VDD is connected (active low)
Enable I²C mode when connected to GND or floating (default)
SDO :I²C Address Select/SPI Data Out (SDO):
I²C address 0x 76 when GND is connected (default)
I²C address 0x77 when VDD is connected
INT: interrupt output pin (open drain output) for data ready/alarm event trigger (external pull-up resistor required)