User Manual

Data sheet

BMP085

Page 4

BST-BMP085-DS000-06 | Revision 1.3 | August 2011 Bosch Sensortec

third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.

Note: Specifications within this document are subject to change without notice.

Index of Contents

1. ELECTRICAL CHARACTERISTICS ....................................................................................... 6

2. ABSOLUTE MAXIMUM RATINGS .......................................................................................... 8

3. OPERATION ............................................................................................................................ 9

3.1 GENERAL DESCRIPTION......................................................................................................... 9

3.2 GENERAL FUNCTION AND APPLICATION SCHEMATICS .............................................................. 9

3.3 MEASUREMENT OF PRESSURE AND TEMPERATURE............................................................... 11

3.4 CALIBRATION COEFFICIENTS ............................................................................................... 12

3.5 CALCULATION PRESSURE AND TEMPERATURE ...................................................................... 13

3.6 CALCULATION ABSOLUTE ALTITUDE ..................................................................................... 15

3.7 CALCULATING PRESSURE AT SEA LEVEL............................................................................... 15

4. I²C INTERFACE ..................................................................................................................... 16

4.1 I²C SPECIFICATION.............................................................................................................. 16

4.2 DEVICE AND REGISTER ADDRESS......................................................................................... 17

4.3 I²C PROTOCOL.................................................................................................................... 17

4.4 START TEMPERATURE AND PRESSURE MEASUREMENT ......................................................... 18

4.5 READ A/D CONVERSION RESULT OR E²PROM DATA ............................................................ 19

5. PACKAGE ............................................................................................................................. 20

5.1 PIN CONFIGURATION ........................................................................................................... 20

5.2 OUTLINE DIMENSIONS ......................................................................................................... 21

5.2.1 TOP VIEW.................................................................................................................................. 21

5.2.2 TOP VIEW WITH LID .................................................................................................................... 22

5.2.3 SIDE VIEW WITH LID.................................................................................................................... 22

5.3 DEVICE MARKING ................................................................................................................ 22

5.4 TAPE ON REEL .................................................................................................................... 23

5.5 PRINTED CIRCUIT BOARD (PCB) DESIGN .............................................................................. 24

5.6 MOISTURE SENSITIVITY LEVEL AND SOLDERING .................................................................... 24

5.7 ROHS COMPLIANCY............................................................................................................ 25

5.8 MOUNTING AND ASSEMBLY RECOMMENDATIONS .................................................................. 25