MS5611-01BA03
Barometric Pressure Sensor, with stainless steel cap
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High resolution module, 10 cm
Fast conversion down to 1 ms
Low power, 1 µA (standby < 0.15 µA)
3
QFN package 5.0 x 3.0 x 1.0 mm
Supply voltage 1.8 to 3.6 V
Integrated digital pressure sensor (24 bit ΔΣ ADC)
Operating range: 10 to 1200 mbar, -40 to +85 °C
2
I C and SPI interface up to 20 MHz
No external components (Internal oscillator)
Excellent long term stability
DESCRIPTION
The MS5611-01BA is a new generation of high resolution altimeter sensors from MEAS Switzerland with SPI
2
and I C bus interface. This barometric pressure sensor is optimized for altimeters and variometers with an
altitude resolution of 10 cm. The sensor module includes a high linearity pressure sensor and an ultra low power
24 bit ΔΣ ADC with internal factory calibrated coefficients. It provides a precise digital 24 Bit pressure and
temperature value and different operation modes that allow the user to optimize for conversion speed and
current consumption. A high resolution temperature output allows the implementation of an
altimeter/thermometer function without any additional sensor. The MS5611-01BA can be interfaced to virtually
any microcontroller. The communication protocol is simple, without the need of programming internal registers in
the device. Small dimensions of only 5.0 mm x 3.0 mm and a height of only 1.0 mm allow for integration in
mobile devices. This new sensor module generation is based on leading MEMS technology and latest benefits
from MEAS Switzerland proven experience and know-how in high volume manufacturing of altimeter modules,
which have been widely used for over a decade. The sensing principle employed leads to very low hysteresis
and high stability of both pressure and temperature signal.
FEATURES
FIELD OF APPLICATION
TECHNICAL DATA
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Mobile altimeter / barometer systems
Sensor Performances (V DD = 3 V)
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Bike computers
Variometers
Height sensing for medical alarms
Indoor navigation
Pressure
Range
Resolution (1)
VDD
PS
Meas. MUX
CSB
Digital
Interface
+IN
PGA
ADC
Sensor
Interface IC
1200
mbar
bit
0.065 / 0.042 / 0.027
/ 0.018 / 0.012
mbar
Accuracy 25°C, 750 mbar
-1.5
+1.5
Error band, -20°C to +85°C
-2.5
+2.5
450 to 1100 mbar (2)
0.5 / 1.1 / 2.1 / 4.1 /
Response time (1)
8.22
Long term stability
±1
mbar
mbar
ms
mbar/yr
Temperature
Min
Typ
-40
Max
Unit
+85
°C
SCLK
Memory
(PROM)
128 bits
Resolution
SGND
Accuracy
GND
DA5611-01BA03_011
000056111624 ECN1742
Unit
SDI/SDA
SDO
dig.
Filter
Max
24
Range
-IN
Typ
10
ADC
FUNCTIONAL BLOCK DIAGRAM
SENSOR
Min
<0.01
-0.8
°C
+0.8
°C
Notes: (1) Oversampling Ratio: 256 / 512 / 1024 / 2048 / 4096
(2) With autozero at one pressure point
www.meas-spec.com
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Oct. 26, 2012