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DA5534_022.doc
July 17th, 2002
1
ECN493
MS5534A
BAROMETER MODULE
♦ Integrated pressure sensor
♦ Pressure range 300-1100 mbar
♦ 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
DESCRIPTION
The MS5534A 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. MS5534A 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.
FEATURES
APPLICATIONS
•••• 15-Bit ADC resolution
•••• Mobile altimeter/barometer systems
•••• Supply voltage 2.2 V to 3.6 V
•••• Weather control systems
•••• Low Supply current
•••• Adventure or multi-mode watches
•••• -40°C to +60°C
•••• GPS Receivers
•••• Small size
•••• No external components required
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 5534
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