Am l f e VeryLow Pressure Sensors
piid
AMPLIFIED Pressure Sensors
Features
• 0.25 and 0.50 In H2O Pressure Ranges
• Ratiometric 4V Output
• Temperature Compensated
• Calibrated Zero and Span
Applications
• Medical Breathing
•HVAC
General Description
(generic product)
The Amplified line of low pressure sensors is based upon a proprietary technology to reduce all output offset or common mode errors. This
model provides a ratiometric 4-volt output with superior output offset characteristics. Output offset errors due to change in temperature,
stability to warm-up, stability to long time period, and position sensitivity are all significantly reduced when compared to conventional
compensation methods. In addition the sensor utilizes a silicon, micromachined, stress concentration enhanced structure to provide a very
linear output to measured pressure.
These calibrated and temperature compensated sensors give an accurate and stable output over a wide temperature range. This series is
intended for use with non-corrosive, non-ionic working fluids such as air, dry gases and the like.
The output of the device is ratiometric to the supply voltage over a supply voltage range of 4.5 to 5.5 volts.
0.25
(6.4)
Pin Size
0.010 x 0.020
(0.25 x 0.50)
0.174 to 0.190
(4.4 to 4.8)
Pin 1 2 3 4
1
0.10 Typical
(2.54)
0.21
(5.3)
A
0.42
(10.5)
1.08
(27.4)
0.66
(16.0)
B
0.48
(12.2)
0.55
(14.0)
0.80
(20.3)
0.85
(21.6)
1.10
(27.9)
Equivalent Circuit
NOTES:
1) Dimensions in inches (millimeters)
pin 1: Vsupply
pin 2: Common
pin 3: Voutput
pin 4: do not connect
All Sensors
DS-0032 Rev A
a
16035 Vineyard Blvd. Morgan Hill, CA 95037
p
408 225 4314
Physical Dimensions
f
408 225 2079
e
www.allsensors.com
all sensors
Pressure Sensor Ratings
Supply Voltage, Vs
Common-mode pressure
Lead Temperature, max (soldering 2-4 sec.)
+4.5 to +5.5 Vdc
-10 to +10 psig
250°C
Environmental Specifications
Temperature Ranges
Compensated
Operating
Storage
Humidity Limits
5 to 50° C
-25 to 85° C
-40 to 125° C
0 to 95% RH
(non condensing)
Performance Characteristics for: 0.25 INCH-D-4V
Parameter,
NOTE
1
Operating Range, differential pressure
Output Span,
NOTE
Minimum
Nominal
±0.25
Maximum
Units
“H2O
5
±1.80
2.00
±2.0
2.25
±2.20
2.50
±50
volt
volt
mvolt
mvolt
mvolt
mvolt
%fs
%span
Offset Voltage @ zero differential pressure
Offset Temperature Shift (5°C-50°C),
Offset Warm-up Shift,
NOTE
NOTE
2
±20
±40
±20
0.05
3
±50
±100
±50
0.25
±4
Offset Position Sensitivity (±1g)
Offset Long Term Drift (one year)
Linearity, hysteresis error,
NOTE
4
Span Shift (5°C-50°C),
NOTE
2
Performance Characteristics for: 0.5 INCH-G-4V
Parameter,
NOTE
1
Operating Range, gage pressure
Output Span,
NOTE
5
Offset Voltage @ zero gage pressure
Offset Temperature Shift (5°C-50°C),
NOTE
2
Offset Warm-up Shift,
NOTE
3
Offset Position Sensitivity (±1g)
Offset Long Term Drift (one year)
Linearity, hysteresis error,
NOTE
4
Span Shift (5°C-50°C),
NOTE
2
±20
±40
±20
0.05
3.80
0.10
Minimum
Nominal
0.5
4.0
0.25
4.20
0.40
±50
±50
±100
±50
0.25
±4
Maximum
Units
“H2O
volt
volt
mvolt
mvolt
mvolt
mvolt
%fs
%span
Specification Notes
NOTE
1: A
LL
2:
3:
4:
5:
PARAMETERS ARE MEASURED AT
5.0
VOLT EXCITATION
,
FOR THE NOMINAL FULL SCALE PRESSURE AND ROOM TEMPERATURE UNLESS OTHERWISE SPECIFIED
.
P
RESSURE
MEASUREMENTS ARE WITH POSITIVE PRESSURE APPLIED TO
NOTE
NOTE
P
ORT
B.
S
HIFT IS RELATIVE TO
25°C.
S
HIFT IS WITHIN THE FIRST HOUR OF EXCITATION APPLIED TO THE DEVICE
.
NOTE
M
EASURED AT ONE
-
HALF FULL SCALE RATED PRESSURE USING BEST STRAIGHT LINE CURVE FIT
.
NOTE
T
HE VOLTAGE ADDED TO THE OFFSET VOLTAGE AT FULL SCALE PRESSURE
. N
OMINALLY THE OUTPUT
PRESSURE
.
VOLTAGE RANGE IS
0.25
TO
4.25
VOLTS FOR MINUS TO PLUS FULL SCALE
All Sensors reserves the right to make changes to any products herein. All Sensors does not assume any liability arising out of the application or
use of any product or circuit described herein, neither does it convey any license under its patent rights nor the rights of others.
Am l f e VeryLow Pressure Sensors
piid
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