■ IPX8 Rated Waterproof Performance ■ Built-in High Accuracy Temperature Compensation Function

IPX8 waterproof rated

BM1390GLV

Compact Waterproof High Accuracy Barometric Pressure Sensor

・ Compact waterproof IPX8 rated package

・ Ceramic package suppresses characteristics fluctuations during measurement due to stress

・ Built-in temperature compensation circuit ensures stable measurement accuracy from low to high temperatures

Delivers superior water resistance in the same small package as conventional products, making it ideal for applications requiring waterproofperformance

Minimizes characteristics fluctuations after mounting on board, contributing to greater flexibility in board layout design

Eliminates the need for an external MCU for temperature correction calculation, reducing design loadBM1390GLVRLGA10VG020T

(2.0mm×2.0×1.0mm)

Utilizes a special gel to protect the IC internals and provide waterproof performanceConventional Product

MEMS

Lid (Cover)

ASICResin FR4 Substrate

Lid (Cover)

ASIC

MEMS

Ceramic Substrate

Waterproof Gel

New Product (BM1390GLV)

■ Ceramic Package Suppresses Characteristics Fluctuations

Resistant to stress on the sensor during board mounting

Stress Simulation Comparison When Mounted on BoardConventional Product New Product (BM1390GLV)

Large characteristics fluctuation with resin

package

Minimal characteristics fluctuation with ceramic

packageLarge Stress

Small Stress

2.0

1.5

1.0

0.5

0.0

-0.5

-1.0

Baro

met

ric P

ress

ure

Mea

sure

men

t Erro

r (hP

a)

50 100Temperature (˚C)

Temperature Characteristics Comparison

-50 0

2.5

3.0Condition: 1,000hPa

ROHM's New Product (BM1390GLV)

StandardProduct A

StandardProduct B

7x higher than ROHM

3x higherthan ROHM

New Product (BM1390GLV)Barometric Pressure Block Diagram

BarometricPressure

Measurement

TemperatureMeasurement

AD Converter＋

CorrectionCalculation

Circuit

MCUnot

required

・ Eliminating the need for an external MCU for temperature correction calculation reduces design load

・ Achieves stable measurement accuracy from low to high temperatures

* IPX8: The IP code indicates the level of protectionagainst foreign particles and water. IPX8 represents the highest waterproof rating.

Featured Products

The information contained in this document is current as of October 1, 2021.

【O_156】Catalog No. 64OP7312E 11.2021 PDF © 2021 ROHM Co., Ltd.

■ Application Examples■ Barometric Pressure Sensor IC Block Diagram

PressureSensor

Temp.Sensor

Clock

16bit

ADC

Memory

I2C I/F

SDASCLDRI

MUX

BarometricPressureDetection

High AccuracyCapture

TemperatureDetection

SignalProcessing

New methods of applying barometric pressure and altitude data expand system functionality・ Consumer appliances such as rice cookers and vacuum cleaners that require pressure control・ Industrial equipment demanding waterproof performance・ Compact IoT devices and drones used outdoors

Altitude measurement and activity analysis

Pressure control optimization by measuring barometric pressure

System control for maintenance and anomaly detection of barometric fluctuations

■ Pressure Sensor IC Specifications

Supply Voltage (V)Barometric

Pressure Range(hPa)

Relative PressureAccuracy

(hPa)(Typ)

AbsolutePressureAccuracy

(hPa)(Typ)

OperatingTemperature

Range(℃)

Package(mm)

1.7 to 3.6 300 to 1,300 ±0.06 ±1 -40 to +85 RLGA10VG020T 2.0×7.75× 1.0

Part No.

BM1390GLV

■ Evaluation KitOnline Distributors: Chip One Stop, Core StaffEvaluation Board Part No: BM1390GLV-EVK-001Support Page: https://www.rohm.com/sensor-shield-support/pressure-sensor2

Available for purchase in single

units

Evaluation Board Part NoBM1390GLV-EVK-001

Sensor Evaluation KitSensorShield-EVK-003

This sensor evaluation kit allows users to easily evaluate the barometric sensor along with 7 other sensors using just an Arduino Uno.

Logic

CorrectionCalculation

Regulator(internal)

VDD VREG VSS

20cm 0.02hPa 20m: 2.4hPa