BMP280 digital pressure sensor pinout

The BMP280 combines pressure and temperature sensing in a metal-lid package. A host can use I²C or SPI.

LGA-8 · 2.0 × 2.5 mm

8 contacts Current package

Bosch Sensortec ·

Transparent top view, with pin 1 at the upper right and clockwise numbering.

Supply input · Power

Digital interface supply. Match the host interface voltage.

Bosch Sensortec BST-BMP280-DS001-26, §§ 1, 4–6.

Pin	Signal	Direction	Function
1	GND Supply return	Supply return	Connect to the common ground plane or bench return.
2	CSB Input	Input	Active-low SPI chip select. Tie directly to VDDIO for I²C before applying power.
3	SDI Bidirectional	Bidirectional	I²C data or SPI data input. In 3-wire SPI, this is the bidirectional data line.
4	SCK Input	Input	Clock input in either I²C or SPI mode.
5	SDO Bidirectional	Bidirectional	4-wire SPI data output. In I²C mode, tie to ground for 0x76 or VDDIO for 0x77. Leave electrically open in 3-wire SPI.
6	VDDIO Supply input	Supply input	Digital interface supply. Match the host interface voltage.
7	GND Supply return	Supply return	Connect to the common ground plane or bench return.
8	VDD Supply input	Supply input	Device supply. Place the bypass capacitor close to this pin.

Tie CSB to VDDIO and strap SDO for 7-bit address 0x76 or 0x77.

Use separate data directions and SPI mode 0 or 3.

Use a bidirectional data line and enable 3-wire mode in the configuration register.

Parameter	Limit	Conditions and source
Sensor supply VDD1.71–3.6 V	1.71–3.6 V	Allow at most 50 mV peak-to-peak supply ripple. Bosch Sensortec BST-BMP280-DS001-26, §§ 1, 4–6.
Interface supply VDDIO1.2–3.6 V	1.2–3.6 V	Sets the logic swing. The bare IC is not a 5 V device. Bosch Sensortec BST-BMP280-DS001-26, §§ 1, 4–6.
Pressure range300–1100 hPa	300–1100 hPa	Absolute pressure. See the datasheet for accuracy across temperature. Bosch Sensortec BST-BMP280-DS001-26, §§ 1, 4–6.

This map is for the bare LGA sensor. Breakout headers and logic-voltage limits depend on the board.

BMP280 manufacturer documentation· Bosch Sensortec BST-BMP280-DS001-26, §§ 1, 4–6.