DA5541B_005.doc

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00005541766 ECN865

MINIATURE 14 bar MODULE

• Integrated pressure sensor 6.2x6.4 mm

• Pressure range 0 - 14 bar (200 PSI)

• 15 Bit ADC

• 6 coefficients for a software compensation stored

on-chip

• 3-wire serial interface

• 1 system clock line (32.768 kHz)

• Low voltage / low power

• RoHS-compatible & Pb-free*

DESCRIPTION

The MS5541B is the miniature version of the popular MS5535B pressure sensor module. It contains a precision

piezoresistive pressure sensor and an improved version of the 15 Bit Micropower Sensor interface IC known

from the MS5535B. Compared to the MS5535A the temperature range has been improved

(-40 to +85°C).

Other improvements concern the ESD sensitivity, current consumption and converter accuracy. In addition to

this the MS5541B is from its outer dimensions compatible to the MS54xx series of pressure sensors. It uses an

antimagnetic polished stainless steel ring for sealing with O-ring. The sensor provides 15 Bit pressure and

temperature data via a 3 wire serial interface that can be easily interfaced with 4 Bit low power microcontrollers.

64 Bit of factory programmed PROM provides calibration data for a highly accurate pressure and temperature

calculation. The MS5541B is fully software compatible to the MS5535B and MS5535A.

FEATURES

APPLICATIONS

•

Resolution 1.2 mbar

•

Small size 6.2x6.4 mm

•

Supply voltage 2.2 V to 3.6 V

•

No external components required

•

Operating current < 5uA

•

Diving computers and divers watches

•

Standby current < 0.1uA

•

Mobile water depth measurement systems

•

-40°C to +85°C

BLOCK DIAGRAM

VDD

GND

MCLK

SCLK

DOUT

DIN

Input MUX

ADC

Digital

Interface

Memory

(PROM)

64 bits

SENSOR

SGND

+IN

-IN

dig.

Filter

Sensor

Interface IC

Fig.: 1 Block Diagram 5541B

equipment) bans the use of lead, mercury, cadmium, hexavalent chromium and polybrominated biphenyls (PBB) or polybrominated

diphenyl ethers (PBDE).