BMP581

BMP581 Barometric Pressure Sensor

Manufacturer

Bosch Sensortec

Overview

Part: BMP581, Bosch Sensortec GmbH

Type: Absolute Barometric Pressure Sensor

Key Specs:

Pressure operating range: 30 .. 125 kPa
Temperature operating range: -40 .. 85°C
Ultra low noise: < 0.1PaRMS natively
Current consumption: 1.3 μA 1Hz in low power mode
Absolute pressure accuracy: ± 0.5 hPa (max)
Relative pressure accuracy: 0.06 hPa per 10kPa step
Pressure Temperature-induced offset: ± 0.5 Pa/K
Output data rates: up to 480 Hz (CONTINUOUS mode), 0.125 .. 240 Hz (NORMAL mode)
Power supply range VDD: 1.71 V ... 3.6 V
Power supply range VDDIO: 1.08 V ... 3.6 V

Features:

On-chip linearization and temperature-compensation
Digital interface: 12 MHz slave SPI (4-wire, 3-wire), 12.5MHz I3C, up to 1MHz I²C (Fm+)
Programmable low-pass filtering
On-chip FIFO buffer for up to 32 pressure samples
Programmable interrupts, including pressure-changed detection
6 bytes user programmable non-volatile memory
RoHS compliant, halogen and lead free

Applications:

Enhancement of GPS navigation
Indoor navigation
Outdoor navigation
Sports applications
Emergency caller location
Weather forecast
Vertical velocity indication
Altitude control of drones and flying toys
Handsets (mobile phones, tablet PCs, GPS devices)
Navigation systems
Portable health care devices
Home weather stations
Smart watches
Virtual and augmented reality devices

Package:

10-pin metal-lid LGA: 2.0 × 2.0 mm2 footprint, max 0.8 mm height

Features

Pressure operating range: 30 .. 125 kPa

Temperature operating range: -40 .. 85°C

Ultra low noise and current consumption:

Ultra low noise: < 0.1PaRMS natively (without low-pass filter enabled)
1.3 μA 1Hz in low power mode

Absolute pressure accuracy: ± 0.5 hPa (max)

Relative pressure accuracy: 0.06 hPa per 10kPa step

Pressure Temperature-induced offset: ± 0.5 Pa/K

BMP581 provides true absolute pressure and temperature, due to on-chip linearization and temperaturecompensation

Primary digital interface with 12 MHz slave SPI (4-wire, 3-wire), 12.5MHz I3C and up to 1MHz I²C (Fm+) Output data rates:

up to 480 Hz in CONTINUOUS mode
0.125 .. 240 Hz in NORMAL mode

Wide power supply range: VDD 1.71 V ... 3.6 V and VDDIO 1.08 V ... 3.6 V, both independent

Programmable low-pass filtering

On-chip FIFO buffer for up to 32 pressure samples

Programmable interrupts, including pressure-changed detection

6 bytes user programmable non-volatile memory

Compact 10-pin metal-lid LGA package with a footprint of only 2.0 × 2.0 mm2 and max 0.8 mm package height. RoHS compliant, halogen and lead free

Applications

Enhancement of GPS navigation (e.g. time-to-first-fix improvement, dead-reckoning, slope detection) Indoor navigation (floor detection, elevator detection) Outdoor navigation Sports applications like calorie counting, fitness activity identification Emergency caller location Weather forecast Vertical velocity indication (e.g. rise/sink speed) Altitude control of drones and flying toys

Pin Configuration

The behavior of the interrupt pin can be configured in INT_CONFIG with these fields:

int_mode: The interrupt mode can be "pulsed" or "latched". Latching determines when an interrupt is released (see Chapter 3.7.3.2 for details)

int_pol: The interrupt polarity can be configured to be either "active high" or "active low"

int_od: The interrupt pin can be configured to be "open-drain" or push-pull"

int_en: The interrupt pin can be enabled. With enabled interrupt pin, all interrupt sources configured in INT_- SOURCE will be ORed on the interrupt pin.

Electrical Characteristics

Parameter	Symbol	Comment	Min	Typ	Max	Unit
Power supply voltage	VDD		1.71	1.8 / 3.3	3.6	V
Power supply voltage I/Os	VDDIO		1.08	1.2/ 1.8 / 3.3	3.6	V
Supply ramp time	t_VDDramp & t_VDDIOramp	10% to 90% of target voltage	0.01a		10	ms
Operational temperature range	TOP_full		-40		85	°C
ODR Accuracy		-40..85°C	-10		+10	%
Power-up time	t_powup	Time to first communication after both VDD > VDDmin and VDDIO > VDDIOmin			2	ms

		VDDIO >
		VDDIOmin
Start-up time from	t_startup	Time from mode
STANDBY		change to start of measurement
Start-up time from	tstartup_deep	Time from mode
DEEP STANBDY		change to start of measurement
Re-configuration	treconf	Time from
time		configuration change in NORMAL or CONTINUOUS mode to start of first measurement
Re-configuration	treconf_deep	Time from
time		configuration change in NORMAL or CONTINUOUS mode to start of first measurement
Time to standby	tstandby	Time from any mode to STANDBY
Soft reset duration	tsoft_res	Time from trigger of soft reset until device ready
I²C interface clock	fi2c	Normal Mode & Fast Mode @ Cbus < 550pF - Fast Mode + @Cbus < 100pF
I3C interface	fi3C	@ VDDIO > 1.62 V
clock		- Normal Mode & Fast Mode @ Cbus < 550pF - Fast Mode + @Cbus > 100pF
I3C interface	fi3C_lowv	@ VDDIO < 1.62 V
clock low voltage		- Normal Mode & Fast Mode @ Cbus < 550pF - Fast Mode + @Cbus > 100pF
SPI interface	fspi	@ VDDIO ≥ 1.62
clock		V, Cbus ≤ 80 pF 4- wire/ 3-wire; modes 0 and 3
SPI interface	fspi_lowv	@ VDDIO ≤ 1.62
clock low voltage		V, Cbus ≤ 40 pF 4- wire/ 3-wire; modes 0 and 3
Peak current	ipeak	maximum DC
-----------------------------	---------------	--------------------------------------- current
Deep Standby		25 °C and
current		VDDIO=VDD=1.8 V
Deep Standby		25 °C and
current		VDDIO=VDD=3.6 V
Deep Standby		55 °C and
current		VDDIO=VDD=1.8 V
Standby current		25 °C and VDDIO=VDD=1.8 V
Standby current		55 °C and VDDIO=VDD=1.8 V
Current		OSR set to "lowest
consumption low		power" Low Power
power mode		Mode ODR=1 Hz 25 °C
Current consumption high		OSR set to "high resolution" ODR =
resolution		30 Hz 25°C
INT pulse length	tint_pulse	Pulse length in
		pulsed mode
INT minimum	tint_deassert	Minimum time
deassert time		between INT pin assert
Maximum output		in CONTINUOUS
rate (ODR)		mode, pressure and temperature measured
Output data rate		in NORMAL mode
(ODR) range
Conversion time	tconv_p	OSR = 1x
pressure		OSR = 2x
		OSR = 4x
		OSR = 8x
		OSR = 16x
		OSR = 32x
		OSR = 64x
		OSR = 128x
Conversion time	tconv_t	OSR = 1x
temperature		OSR = 2x
		OSR = 4x
		OSR = 8x
		OSR = 16x
		OSR = 32x
		OSR = 64x
		OSR = 128x

Parameter	Symbol	Comment	Min	Typ	Max	Unit
Temperature measurement range		Temperature measured in the entire temperature operational range	-40		85	°C
Absolute accuracy temperature	A_t_abs	-5 .. 55°C		+/- 0.5		K
Absolute accuracy temperature full range	A_t_abs_full	-40 .. 85°C		+/- 0.5		K
Relative accuracy temperature	A_t_rel_full	-40 .. 85°C, 20 K steps				K
Temperature data resolution	A_t_res		1/65536		+ 1.0	°C

| Table 5: Interface pin electrical characteristics | | :----------------------- | :------ | :---------------------------------------------------------------- | :--- | :--- | :--- | :---- | | Parameter | Symbol | Comment | Min | Typ | Max | Unit | | Input low voltage | VIL | @VDDIO=1.2V/ 1.8V/3.3V+/-10% | | | 30 | % | | Input high voltage | VIH | @VDDIO=1.2V/ 1.8V/3.3V+/-10% | 70 | | | % | | Input voltage hysteresis | VHYST | @VDDIO=1.2V/ 1.8V/3.3V+/-10% | 10 | | | % | | Output low voltage | VOL | @VDDIO=1.2V/ 1.8V/3.3V+/-10% | | | 20 | % | | Output high voltage | VOH | @VDDIO=1.2V/ 1.8V/3.3V+/-10% | 80 | | | % | | Pull-up resistance at CSB pin | RPU_CSB | I2C mode, relevant for interface mode selection | 74 | 100 | 131 | kOhm |

Absolute Maximum Ratings

Parameter	Comment	Min	Max	Unit
Storage temperaturea	≤ 65 % r.h. Standard conditions: + 25°C and 40% r.h.	-40	+125	°C
Supply voltage VDD		-0.3	4.3	V
Supply voltage VDDIO		-0.3	4.3	V
Max Voltage at I/O Pins		VSSIO-0.3 V	VDDIO + 0.3 V	V

a. Storage should occur at standard conditions. For short time periods, the device may be stored outside of this range, but must stay within above mentioned limits.

Stress above those listed as "absolute maximum ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device under these conditions is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.

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