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DA5534_022.doc
July 17th, 2002
3
ECN493
RECOMMENDED OPERATING CONDITIONS
(T=25°C, VDD=3.0V unless noted otherwise)
Parameter
Symbol
Conditions
Min.
Typ.
Max
Unit
Supply Voltage
VDD
2.2
3.0
3.6
V
Supply Current,
average (1)
during conversion (2)
standby (no conversion)
Iavg
ISC
Iss
VDD = 3.0 V
5
1
3.5
µA
mA
µA
Current consumption into
MCLK (3)
MCLK=32768Hz
0.5
µA
Operating pressure range
p
300
1100
mbar
abs.
Operating temperature
range
Ta
-10
+25
+60
°C
Conversion time
Tconv
MCLK=32768Hz
35
ms
External clock signal (4)
MCLK
30000
32768
35000
Hz
Duty cycle of MCLK
40/60
50/50
60/40
%
Serial Data Clock
SCLK
500
kHz
Notes:
1.
Under the assumption of one conversion every second. Conversion means either a pressure or a
temperature measurement started by a command to the serial interface of MS5534.
2.
During conversion the sensor will be switched on and off in order to reduce power consumption; the total on
time within a conversion is about 2ms.
3.
This value can be reduced by switching off MCLK while MS5534 is in standby mode.
4.
It is strongly recommended that a crystal oscillator be used because the device is sensitive to clock jitter. A
square-wave form of the clock signal is a must.
5.
Reliable operation requires protection of the pressure sensor from direct contact with light.
6.
Power supply pins (VDD, GND) must be decoupled with a tantalum (47
µF) capacitor placed close to the
module.
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