Datasheet > MS5540C

MS5540C

更新时间： 2024-11-11 05:50:23

品牌	Logo	应用领域
INTERSEMA		/
页数	文件大小	规格书
18页	284K
描述
MINIATURE BAROMETER MODULE

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MS5540C 数据手册

MS5540C (RoHS^*) MINIATURE BAROMETER MODULE

• 10 - 1100 mbar absolute pressure range

• 6 coefficients for software compensation stored

on-chip

• Piezoresistive silicon micromachined sensor

• Integrated miniature pressure sensor 6.2 x 6.4 mm

• 16 Bit ADC

• 3-wire serial interface

• 1 system clock line (32.768 kHz)

• Low voltage and low power consumption

• RoHS-compatible & Pb-free*

DESCRIPTION

The MS5540C is a SMD-hybrid device including a precision piezoresistive pressure sensor and an ADC-

Interface IC. It is a miniature version of the MS5534C barometer/altimeter module and provides a 16 Bit data

word from a pressure and temperature dependent voltage. MS5540C 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 micro-

controller.

Compared to MS5534A the pressure range (measurement down to 10 mbar) has been improved. The MS5540C

is fully software compatible to the MS5534C and previous versions of MS5540. In addition, the MS5540C is from

its outer dimensions compatible to the MS54XX series of pressure sensors. Compared to the previous version

the ESD sensitivity level has been improved to 4kV on all pins. The gel protection of the sensor provides a water

protection sufficient for 100 m waterproof watches without any additional protection.

FEATURES

APPLICATIONS

•

Resolution 0.1 mbar

•

Mobile altimeter/barometer systems

Weather control systems

Adventure or multi-mode watches

GPS receivers

Supply voltage 2.2 V to 3.6 V

Low supply current < 5 µA

Standby current < 0.1 µA

-40°C to +85°C operation temperature

No external components required

BLOCK DIAGRAM

VDD

MCLK

Input MUX

+IN

-IN

Digital

Interface

SENSOR

DIN

DOUT

SCLK

dig.

Filter

ADC

Memory

(PROM)

64 bits

Sensor

Interface IC

SGND

GND

Fig. 1: Block diagram MS5540C.

^*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).

DA5540C_003

0005540C1193 ECN 1118

June 16th, 2008

12 3 4 5 6 7...18

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