Pressure sensors
Barometric pressure transmitters for SMT (voltage output)
Series/Type:
Ordering code:
Date:
Version:
ASB series
2009-08-03
2
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Identification/Classification 2
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Ordering code: (top right header bar)
Series/Type: (top right header bar)
Preliminary data (optional):
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Department:
Date:
Version:
ASB series
Preliminary data
AS SEN PD
2009-08-03
2
Pressure sensors
Barometric pressure transmitters for SMT (voltage output)
EPCOS AG 2009. Reproduction, publication and dissemination of this publication, enclosures hereto and the information
contained therein without EPCOS' prior express consent is prohibited
Pressure sensors
Barometric pressure transmitters for SMT (voltage output)
Preliminary data
Description
The transmitters are based on piezoresistive
silicon pressure sensors from our own clean
room.
The ASB-series electronic compensates
nonlinearity and temperature errors and
supplies a precise calibrated output signal
with a high immunity against electromagnetic
influences (EMI).
Features
Piezoresistive MEMS technology
Measured media:
Air, non-aggressive gases (gas humidity
0 ... 100% r.h. , short term dewing admissible).
Suitable for IP54 applications (gel protected)
Unsuitable for substances, which react with
glass, silicon, stainless steel, ceramics,
aluminum, silicone glue or silicone gel.
Voltage output proportional to pressure:
0 ... 1 V or ratiometric to V
CC
RoHS-compatible, halogen-free
SMT ceramic package for PCB mounting
Dimensional drawings
4
2.5
0.5
0.6
3.4
ASB series
3
4
1
Ø3.5
Ø3
4
2
1
Material: PtAg
0.7
All dimensions in mm
Terminal assignment
Pin Symbol
1
2
3
4
-
GND
V
A
V
CC
Signal
not connected
Ground
Output signal
Supply voltage
p
U
GND
V
cc
V
A
AS SEN PD
Please read Cautions and warnings and
Important notes at the end of this document.
Page 2 of 7
2009-08-03
Pressure sensors
Barometric pressure transmitters for SMT (voltage output)
Preliminary data
Technical data
Absolute maximum ratings
Parameter
Temperature ranges
Storage temperature range
Operating temperature rang e
Compensated temperature range
Soldering temperature
Pressure ranges
Rated pressure range
Overpressure
Supply voltage /-current
Supply voltage
Supply current
Signal output current
Start up time
Parameter
V
CC
I
CC
I
A
t
STA
Symbol
6)
ASB series
Symbol
Conditions
Min.
Typ.
Max.
Unit
T
st
T
a
T
c
T
solder
1)
2)
3)
–40
–40
0
+125
+85
+70
260
°
C
°
C
°
C
°
C
<10 s
p
r
p
ov
Absolute pressure
Absolute pressure
4)
5)
0.2
1.5
1.2
bar
p
r
2.7
5.5
5
2
10
V
mA
mA
ms
I
A
= 0
7)
8)
Conditions
Min.
Typ.
Max.
Unit
Output signal @ T
a
= 25° V
CC
= 5 V, I
A
< 0.1 mA
C,
Offset (@ p
r,min
)
V
A0
V1: 0 … 1000 mV
VR: ratiometric
9)
10)
9)
0
2.5
10
1000
80
±0.1
2
11
mV
%V
CC
mV
%V
CC
% FS
ms
bit
Max.
Unit
Signal span (Full Scale)
Nonlinearity
Response time
Resolution
Parameter
V
FS
L
t
10-90
r
OUT
Symbol
V1: 0 … 1000 mV
VR: ratiometric
10), 11)
12)
13)
10)
Conditions
Min.
Typ.
Data in temperature range @ T
a
= 0 ... 70 ° V
CC
= 5 V, I
A
< 0.1 mA
C,
Temperature hysteresis
14)
±0.1
% FS
Data in temperature range @ T
a
= 0 ... 70 ° V
CC
= 5 V, I
A
< 0.1 mA
C,
Temperature coefficient of offset
Temperature coefficient of span
TCV
A0
TCV
FS
15)
16)
±0.015
±0.015
% FS/K
% FS/K
AS SEN PD
Please read Cautions and warnings and
Important notes at the end of this document.
Page 3 of 7
2009-08-03
Pressure sensors
Barometric pressure transmitters for SMT (voltage output)
Preliminary data
Characteristics
ASB series
V
A0
+ V
FS
V
A0
p
r,min
p
r,max
Rated pressures and ordering codes
Pressure
measurement
Rated pressure p
r
bar
Output
absolute
1.2
absolute
1.2
0 … 1000 mV
ratiometric
B58620A0010A001
Ordering code
AS SEN PD
Please read Cautions and warnings and
Important notes at the end of this document.
Page 4 of 7
B58620A0010A002
ASB 1200 VR
ASB 1200 V1
Product type
2009-08-03
Pressure sensors
Barometric pressure transmitters for SMT (voltage output)
Preliminary data
Symbols and terms
1)
ASB series
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
Storage temperature range T
st
A storage of the pressure sensor within the temperature range T
st,min
up to T
st,max
and without applied pressure and supply voltage will not affect the performance of the pressure sensor.
Operating temperature range T
a
An operation of the pressure sensor within the temperature range T
a,min
up to T
a,max
will not affect the performance of the pressure sensor.
Compensated temperature range T
c
While operating the pressure sensor within the temperature range T
c,min
up to T
c,max
,
the deviation of the output signal from the values at 25 ° will not exceed the temperature coefficients.
C
Out of the compensated temperature range, the deviations may increase.
Rated pressure p
r
Within the rated pressure range p
r,min
up to p
r,max
the signal output characteristic corresponds to this specification.
Overpressure p
OV
Pressure cycles within the pressure range 0 up to p
ov
will not affect the performance of the pressure sensor.
Supply voltage V
CC
V
CC,max
is the maximum permissible supply voltage, which can be applied without damages.
V
CC,min
is the minimum required supply voltage, which has to be applied for normal operation.
Signal output current I
A
I
A,max
is the maximum permissible sink current of the signal output.
Exceeding (e.g. short circuit) may cause irreparable damages.
Start up time t
STA
Time between the start up of the normal operation after power on and the first valid output signal.
Offset V
A0
The offset V
A0
is the signal output V
A
(p
r,min
).
Signal span (Full Scale)
V
FS
= FS = V
A
(p
r,max
) – V
A0
Nonlinearity L (including pressure hysteresis)
The nonlinearity is the deviation of the real sensor characteristic V
A
= f(p) from the ideal straight line.
It can be approximated by a polynomial of second order, with the maximum at p
x
= p
r
/ 2 .
The equation to calculate the nonlinearity is:
L
=
12)
V
A
(p
x
)
−
V
A 0
p
x
−
V
A
(p
r
)
−
V
A 0
p
r
13)
14)
15)
16)
Response time t
10-90
Delay between a pressure change (10 ... 90% p
r
) and the corresponding signal output change (10 ... 90% FS).
Resolution r
OUT
The resolution of the output DAC (digital/analog converter). For ratiometric output only 80% of DAC range is used.
Temperature hysteresis
The temperature hysteresis is the change of offset, starting from the value at 25 ° after a temperature change
C
and return to 25 ° Determined during temperature cycles in operating temperature range (cycles with 1 K/min).
C.
Temperature coefficient of offset TCV
A0
Offset at temperature T
x
: V
A0
(T
x
) = V
A0
(25 ° + V
FS
(25 ° · (T
x
– 25 ° · TCV
A0
C)
C)
C)
Values are valid within the compensated temperature range T
c,min
up to T
c,max
Out of the compensated temperature range, the deviation may increase.
Temperature coefficient of span TCV
FS
Span at temperature T
x
: V
FS
(T
x
) = V
FS
(25 ° · [ 1 + (T
x
– 25 ° · TCV
FS
]
C)
C)
Values are valid within the compensated temperature range T
c,min
up to T
c,max
Out of the compensated temperature range, the deviation may increase.
AS SEN PD
Please read Cautions and warnings and
Important notes at the end of this document.
Page 5 of 7
2009-08-03
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