
DA5534B_003.doc
00005534B784
ECN 711
February 28th, 2005
1
MS5534B
BAROMETER MODULE
10 - 1100 mbar absolute pressure range
6 coefficients for software compensation stored
on-chip
Piezoresistive silicon micromachined sensor
Integrated miniature pressure sensor 9 x 9 mm
15 Bit ADC
3-wire serial interface
1 system clock line (32.768 kHz)
Low voltage and low power consumption
RoHS-compatible & Pb-free
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DESCRIPTION
The MS5534B is a SMD-hybrid device including a piezoresistive pressure sensor and an ADC-Interface IC. It
provides a 16 Bit data word from a pressure and temperature dependent voltage. Additionally the module
contains 6 readable coefficients for a highly accurate software calibration of the sensor. MS5534B is a low
power, low voltage device with automatic power down (ON/OFF) switching. A 3-wire interface is used for all
communications with a microcontroller. Sensor packaging options are plastic or metal cap.
Compared to the previous version (MS5534A) the temperature range has been improved (-40 to +125°C) as well
as the pressure range (measurement down to 10 mbar). Other improvements concern the ESD sensitivity,
current consumption and converter accuracy.
FEATURES
APPLICATIONS
Supply voltage 2.2 V to 3.6 V
Low supply current
-40°C to +125°C operation temperature
No external components required
Mobile altimeter / barometer systems
Weather control systems
Adventure or multi-mode watches
GPS receivers
BLOCK DIAGRAM
VDD
GND
MCLK
SCLK
DOUT
DIN
Input MUX
ADC
IDigital
Memory
(PROM)
64 bits
SENSOR
SGND
+IN
-IN
dig.
Filter
Sensor
Interface IC
Fig. 1: Block diagram 5534B.
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The European RoHS directive 2002/95/EC (Restriction of the use of certain Hazardous Substances in electrical and electronic equipment)
bans the use of lead, mercury, cadmium, hexavalent chromium and polybrominated biphenyls (PBB) or polybrominated diphenyl ethers
(PBDE).