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PDF MS5561C Data sheet ( Hoja de datos )
| Número de pieza | MS5561C | |
| Descripción | Micro Altimeter | |
| Fabricantes | TE | |
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MS5561C
Micro Altimeter
SPECIFICATIONS
10 - 1100 mbar / 1 – 110 kPa absolute pressure range
High accuracy temperature measurement
Integrated miniature pressure sensor 4.75 x 4.25 mm
Thin design of 1.6 mm
Piezoresistive silicon micromachined 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
The MS5561C 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
MS5561C 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.
SENSOR SOLUTIONS ///MS5561C
09/2015
Page 1
1 page  
MS5561C
Micro Altimeter
ELECTRICAL CHARACTERISTICS
DIGITAL INPUTS
Parameter
Input High Voltage
Input Low Voltage
Signal Rise Time
Signal Fall Time
Symbol
VIH
VIL
tr
tf
Conditions
(T = -40 °C .. 85 °C, VDD = 2.2 V .. 3.6 V)
Min Typ Max Unit
80% VDD
100% VDD
V
0% VDD
20% VDD
V
200 ns
200 ns
DIGITAL OUTPUTS
Parameter
Output High Voltage
Output Low Voltage
Signal Rise Time
Signal Fall Time
AD-CONVERTER
Parameter
Resolution
Linear Range
Conversion Time
INL
Symbol
VOH
VOL
tr
tf
Conditions
Isource = 0.6 mA
Isink = 0.6 mA
(T = -40 °C .. 85 °C VDD = 2.2 V .. 3.6 V)
Min Typ Max Unit
80% VDD
100% VDD
V
0% VDD
20% VDD
V
200 ns
200 ns
Symbol Conditions
MCLK = 32.768 kHz
Within linear range
Min
4'000
-5
(T = -40 °C .. 85 °C VDD = 2.2 V .. 3.6 V)
Typ Max Unit
16 Bit
40'000
LSB
35 ms
+5 LSB
SENSOR SOLUTIONS ///MS5561C
09/2015
Page 5
5 Page 
MS5561C
Micro Altimeter
Start
Read calibration data (factory calibrated) from
PROM of MS5561C
Word1, Word2, Word3 and Word4 (4x16 Bit)
Basic equations:
Convert calibration data into coefficients:
(see bit pattern of Word1-Word4)
C1: Pressure sensitivity
C2: Pressure offset
C3: Temperature coefficient of pressure sensitivity
C4: Temperature coefficient of pressure offset
C5: Reference Temperature
C6: Temperature coefficient of the temperature
(15 Bit)
(12 Bit)
(10 Bit)
(10 Bit)
(11 Bit)
(6 Bit)
SENST1
OFFT1
TCS
TCO
Tref
TEMPSENS
Example:
Word1 = 46940
Word2 = 40217
Word3 = 25172
Word4 = 47212
C1 = 23470
C2 = 1324
C3 = 737
C4 = 393
C5 = 628
C6 = 25
Read digital pressure value from MS5561C
D1 (16 Bit)
Read digital temperature value from MS5561C
D2 (16 Bit)
Calculate calibration temperature
UT1 = 8*C5+20224
Calculate actual temperature
Difference between actual temperature and reference
temperature:
dT = D2 - UT1
Actual temperature:
TEMP = 200 + dT*(C6+50)/210 (0.1°C resolution)
dT(D2) = D2 - Tref
TEMP(D2) = 20°+dT(D2)*TEMPSENS
Calculate temperature compensated pressure
Offset at actual temperature:
OFF = C2*4 + ((C4-512)*dT)/212
Sensitivity at actual temperature:
SENS = C1 + (C3*dT)/210 + 24576
X = (SENS * (D1-7168))/214 - OFF
Temperature compensated pressure:
P = X*10/25 + 250*10 (0.1 mbar resolution)
OFF(D2) = OFFT1+TCO*dT(D2)
SENS(D2) = SENST1+TCS*dT(D2)
P(D1,D2) = D1*SENS(D2)-OFF(D2)
D1 = 16460
D2 = 27856
UT1 = 25248
dT = 2608
TEMP = 391
= 39.1 °C
OFF = 5220
SENS = 49923
X = 23093
P = 9716
= 971.6 mbar
Display pressure and temperature value
Fig. 3: Flow chart for pressure and temperature reading and software compensation
SENSOR SOLUTIONS ///MS5561C
09/2015
Page 11
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet MS5561C.PDF ] | |
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