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PDF MS5561-C Data sheet ( Hoja de datos )
| Número de pieza | MS5561-C | |
| Descripción | MICRO ALTIMETER | |
| Fabricantes | Intersema | |
| Logotipo |  |
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MS5561-C
MICRO ALTIMETER
• 10 - 1100 mbar / 1 – 110 kPa absolute pressure range
• High accuracy temperature measurement
• Integrated miniature pressure sensor module
4.75 mm x 4.25 mm
• Thin design of 1.6 mm
• Piezo-resistive silicon micro-machined sensor
• 6 coefficients for software compensation stored on-
chip
• 16 bit ADC, sigma delta converter
• 3-wire serial interface
• 1 system clock line (32.768 kHz)
• Low voltage and low power consumption
• RoHS-compatible & Pb-free*
DESCRIPTION
The MS5561 is a SMD-hybrid device including a precision piezo-resistive pressure sensor and an ADC-Interface
IC. It uses a three-wire serial interface for communication. The module dimensions of 4.75 mm x 4.25 mm and a
height of only 1.6 mm allows for up-to-date SMD design. It provides a 16 bit data word from a pressure and
temperature dependent voltage. The MS5561 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.
FEATURES
APPLICATIONS
• Pressure resolution 0.1 mbar
• Operating temperature -40°C to +85°C
• Supply voltage 2.2 V to 3.6 V
• Low supply current, typ. 4 µA
Standby current < 0.1 µA
• Calibrated temperature and pressure sensor for
2nd order compensation
• ESD protected, HBM 4 kV
• Mobile phones
• GPS receivers
• Altimeter applications
• Personal Navigation Devices (PND)
• Digital cameras with altimeter function
BLOCK DIAGRAM
SENSOR +IN
-IN
SGND
Input MUX
ADC
dig.
Filter
Sensor
Interface IC
Digital
Interface
Memory
(PROM)
64 bits
Fig. 1: Block diagram MS5561
VDD
MCLK
DIN
DOUT
SCLK
GND
*
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).
DA5561_03
000055611126 – ECN1158
January 5, 2009
1
1 page  
PRESSURE OUTPUT CHARACTERISTICS
With the calibration data stored in the interface IC of the MS5561, the following characteristics can be achieved:
Parameter
Resolution
Absolute Pressure Accuracy
Relative Pressure Accuracy
Relative Pressure Error over
Temperature
Long-term Stability
Maximum Error over Supply
Voltage
Conditions
p = 300 .. 1000 mbar
Ta = 25°C
p = 750 .. 1100 mbar
Ta = 25°C
p = 750 .. 1100 mbar
Ta = 25°C
T = 0 .. +50°C
p = 300 .. 1000 mbar
T = -40 .. +85°C
p = 300 .. 1000 mbar
12 months
VDD = 2.2 .. 3.6 V
p = const.
(VDD = 3.0 V unless noted otherwise)
Min Typ Max Unit Notes
0.1
mbar
1
-1.5
+1.5 mbar
2
-0.5
+0.5 mbar
3
-1
+1 mbar
4
-2 +3 mbar
-1 mbar
-1.6 +1.6 mbar
4
5
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 pressure output.
Parameter
Resolution
Accuracy
Maximum Error over Supply
Voltage
Conditions
T = 20°C
T = -40 .. +85°C
VDD = 2.2 .. 3.6 V
(VDD = 3.0 V unless noted otherwise)
Min Typ Max Unit Notes
0.005 0.01 0.015
-0.8 0.8
-2 +3
°C
°C
°C
1
-0.2
+ 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
DA5561_03
000055611126 – ECN1158
January 5, 2009
5
5 Page 
C1 (15 bit)
C5/I
1 bit
Word1 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 DB10
C5/II (10 bit)
C6 (6 bit)
Word2 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 DB5 DB4 DB3 DB2 DB1 DB0
C4 (10 bit)
C2/I (6 bit)
Word3 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 DB11 DB10 DB9 DB8 DB7 DB6
Word4
C3 (10 bit)
C2/II (6 bit)
DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 DB5 DB4 DB3 DB2 DB1 DB0
Fig. 4: Arrangement (bit pattern) of calibration data in Word1 to Word4.
SECOND-ORDER TEMPERATURE COMPENSATION
In order to obtain best accuracy over the whole temperature range, it is recommended to compensate for the
non-linearity of the output of the temperature sensor. This can be achieved by correcting the calculated
temperature and pressure by a second order correction factor. The second-order factors are calculated as
follows:
TEMP < 200
yes
Low temperatures
T2 = 11*(C6+24)*(200 - TEMP)*(200 – TEMP) / 220
P2 = 3 *T2 * (P - 3500)/214
200 ≤ TEMP ≤ 450
TEMP > 450
yes
No correction
T2 = 0
P2 = 0
yes
High temperatures
T2 = 3*(C6+24)*(450 - TEMP)*(450 – TEMP) / 220
P2 = T2 * (P - 10000)/213
Calculate pressure and temperature
TEMP = TEMP – T2
P = P – P2
Fig. 5: Flow chart for calculating the temperature and pressure to the optimum accuracy.
DA5561_03
000055611126 – ECN1158
January 5, 2009
11
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet MS5561-C.PDF ] | |
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