MS5535C
14 bar Pressure Sensor Module
SPECIFICATIONS
0
–
14 bar 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
The MS5535C 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.
MS5535C 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 MS5535C is fully software compatible to the previous versions
(MS5535A and MS5535B). Compared to the previous versions the
ESD sensitivity has been improved to 4kV on all pins.
SENSOR SOLUTIONS
///MS5535C
06/2017
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MS5535C
14 bar Pressure Sensor Module
FEATURES
Supply voltage 2.2 V to 3.6 V
Low supply current
-40°C to +125°C operation temperature
No external components required
16 Bit ADC resolution pressure measurement
and control systems
APPLICATIONS
Mobile water depth measurement systems
Diving computers and divers watches
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 MS5535C
SENSOR SOLUTIONS
///MS5535C
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MS5535C
14 bar Pressure Sensor Module
PIN CONFIGURATION
Fig. 2: Pin configuration of MS5535C
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
Ta = 25 °C
Min
-0.3
-40
Max
4
+125
30
Unit
V
°C
bar
Notes
1
2
NOTES
1) Storage and operation in an environment of dry and non-corrosive gases.
2) The MS5535-CM is qualified referring to the ISO 6425 standard and can withstand an absolute pressure of 30
bar in salt water.
SENSOR SOLUTIONS
///MS5535C
06/2017
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MS5535C
14 bar Pressure Sensor 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
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
Conditions
(Ta = 25 °C, V
DD
= 3.0 V unless noted otherwise)
Min
Typ
Max
Unit
0
14
bar
2.2
3.0
3.6
V
4
1
0.1
0.5
+125
35
35.000
60/40
500
µA
mA
µA
µA
°C
ms
kHz
%
kHz
V
DD
= 3.0 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 MS5535C.
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 MS5535C 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.
SENSOR SOLUTIONS
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MS5535C
14 bar Pressure Sensor 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
SENSOR SOLUTIONS
///MS5535C
06/2017
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