MS5534C
Barometer Module
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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
16 Bit ADC
3-wire serial interface
1 system clock line (32.768 kHz)
Low voltage and low power consumption
DESCRIPTION
The MS5534C 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. MS5534C 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.
The MS5534C is fully software compatible to the previous versions (MS5534A and MS5534B). Compared to the
previous versions the ESD sensitivity level has been improved to 4kV on all pins.
FEATURES
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Supply voltage 2.2 V to 3.6 V
Low supply current
-40°C to +125°C operation temperature
No external components required
APPLICATIONS
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Mobile altimeter / barometer systems
Weather control systems
Adventure or multi-mode watches
GPS receivers
BLOCK DIAGRAM
VDD
MCLK
Input MUX
SENSOR
+IN
dig.
Filter
Digital
Interface
ADC
DIN
DOUT
SCLK
-IN
Sensor
Interface IC
SGND
Memory
(PROM)
64 bits
GND
Fig. 1: Block diagram MS5534C
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MS5534C
Barometer Module
PIN CONFIGURATION
Fig. 2: Pin configuration of MS5534C
Pin Name
GND
SCLK
DOUT
DIN
MCLK
VDD
PEN (1)
PV (1)
Pin
1
2
3
4
5
6
7
8
Type
G
I
O
I
I
P
I
N
Function
Ground
Serial data clock
Data output
Data input
Master clock (32.768 kHz)
Positive supply voltage
Programming enable
Negative programming voltage
NOTE
1) Pin 7 (PV) and Pin 8 (PEN) are only used by the manufacturer for calibration purposes and should not be
connected.
ABSOLUTE MAXIMUM RATINGS
Parameter
Supply voltage
Storage temperature
Overpressure
Symbol
V
DD
T
S
P
Conditions
Ta = 25 °C
MS5534-CP, Ta = 25 °C
MS5534-CM, Ta = 25 °C
Min
-0.3
-40
Max
4
+125
5
10
Unit
V
°C
bar
bar
Notes
1
2
NOTES
1) Storage and operation in an environment of dry and non-corrosive gases.
2) The MS5534-CM is qualified referring to the ISO 2281 standard and can withstand an absolute pressure of
11 bar in salt water or 100 m water respectively.
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MS5534C
Barometer Module
RECOMMENDED OPERATING CONDITIONS
Parameter
Operating pressure range
Supply voltage
Supply current,
average (1)
during conversion (2)
standby (no conversion)
Current consumption into MCLK
(3)
Operating temperature range
Conversion time
External clock signal (4)
Duty cycle of MCLK
Serial data clock
Symbol
p
V
DD
V
DD
= 3.0 V
I
avg
I
sc
I
ss
MCLK = 32.768 kHz
T
t
conv
MCLK
SCLK
-40
MCLK = 32.768 kHz
30.000
40/60
32.768
50/50
4
1
0.1
0.5
+125
35
35.000
60/40
500
µA
mA
µA
µA
°C
ms
kHz
%
kHz
Conditions
(Ta = 25 °C, V
DD
= 3.0 V unless noted otherwise)
Min
Typ
Max
Unit
mbar
10
1100
abs.
2.2
3.0
3.6
V
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 MS5534C.
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 2 ms.
3) This value can be reduced by switching off MCLK while MS5534C 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.
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MS5534C
Barometer Module
ELECTRICAL CHARACTERISTICS
DIGITAL INPUTS
Parameter
Input High Voltage
Input Low Voltage
Signal Rise Time
Signal Fall Time
Symbol
V
IH
V
IL
t
r
t
f
Conditions
(T = -40 °C .. 125 °C, V
DD
= 2.2 V .. 3.6 V)
Min
Typ
Max
Unit
80% V
DD
100% V
DD
V
0% V
DD
20% V
DD
V
200
ns
200
ns
DIGITAL OUTPUTS
Parameter
Output High Voltage
Output Low Voltage
Signal Rise Time
Signal Fall Time
Symbol
V
OH
V
OL
t
r
t
f
Conditions
I
source
= 0.6 mA
I
sink
= 0.6 mA
(T = -40 °C .. 125 °C, V
DD
= 2.2 V .. 3.6 V)
Min
Typ
Max
Unit
80% V
DD
100% V
DD
V
0% V
DD
20% V
DD
V
200
ns
200
ns
AD-CONVERTER
Parameter
Resolution
Linear Range
Conversion Time
INL
Symbol
Conditions
(T = -40 °C .. 125 °C, V
DD
= 2.2 V .. 3.6 V)
Min
Typ
Max
Unit
16
Bit
4'000
40'000
LSB
35
ms
-5
+5
LSB
MCLK = 32.768 kHz
Within linear range
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MS5534C
Barometer Module
PRESSURE OUTPUT CHARACTERISTICS
With the calibration data stored in the interface IC of the MS5534C, the following characteristics can be
achieved:
Parameter
Resolution
Absolute Pressure Accuracy
Relative Pressure Accuracy
Conditions
p =750 .. 1100 mbar
Ta = 25°C
p =750 .. 1100 mbar
Ta = 25°C
T = -40 .. +85°C
p =300 .. 1000 mbar
T = -40 .. +125°C
p =300 .. 1000 mbar
12 months
V
DD
= 2.2 .. 3.6 V
p = const.
Min
(V
DD
= 3.0 V unless noted otherwise)
Typ
Max
Unit
Notes
0.1
mbar
1
+1.5
+0.5
+2
+5
-1
-1.6
1.6
mbar
mbar
mbar
mbar
mbar
mbar
2
3
4
4
5
-1.5
-0.5
-2
-8
Relative Pressure Error over
Temperature
Long-term Stability
Maximum Error over Supply
Voltage
NOTES
1) A stable pressure reading of the given resolution requires taking the average of 2 to 4 subsequent pressure
values due to noise of the ADC.
2) Maximum error of pressure reading over the pressure range.
3) Maximum error of pressure reading over the pressure range after offset adjustment at one pressure point.
4) With the second-order temperature compensation as described in Section "FUNCTION". See next section
for typical operating curves.
5) The long-term stability is measured with non-soldered devices.
TEMPERATURE OUTPUT CHARACTERISTICS
This temperature information is not required for most applications, but it is necessary to allow for temperature
compensation of the output.
Parameter
Resolution
Accuracy
Maximum Error over Supply
Voltage
Conditions
T = 20 °C
T = -40 .. + 85°C
T = -40 .. +125°C
V
DD
= 2.2 .. 3.6 V
Min
0.005
-0.8
-2
-6
-0.2
(V
DD
= 3.0 V unless noted otherwise)
Typ
Max
Unit
Notes
0.01
0.015
°C
0.8
°C
+2
°C
1
+3
°C
1
+0.2
°C
2
NOTES
1) With the second-order temperature compensation as described in Section "FUNCTION". See next section
for typical operating curves.
2) At Ta = 25 °C.
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