Model 1220 Low Pressure
PC Board Mountable Pressure Sensor
0-10" H
2
O to 0-1 PSI
0-50 mV Output
Low Cost
Temperature Compensated
Medical Instruments
Air Flow Measurement
HVAC
Process Control
Factory Automation
Leak Detection
DESCRIPTION
The Model 1220 is a temperature compensated, piezoresistive
silicon pressure sensor packaged in a dual-in-line configuration
and intended for cost sensitive applications where excellent
performance and long-term stability are required. The 1220 is a
fixed voltage referenced, current set version, designed for 1%
interchangeability to provide a 50 mV span at 1 PSI.
Integral temperature compensation is provided over a range
of 0-50°C using laser-trimmed resistors. An additional laser-
trimmed resistor is included to adjust the gain of an external
differential amplifier. This provides sensitivity interchangeability
of ±1%.
The sensing element used in the low pressure Model 1220
includes a double bossed design that produces a sensor output
of 100 mV (typical) at 1 PSI.
FEATURES
Dual-in-line Package
±0.1%
Non-linearity
1.0% Interchangeable Span
(provided by current set resistor)
Temperature Compensated
Solid State Reliability
Low Power
The 1220 is also available in ranges up to 0-100 PSI. For a
compensated sensor using a gain set resistor as opposed to a
current set resistor, please refer to the Model 1210.
DIMENSIONS
STANDARD RANGES
Range
0 to1
0 to10
psi
in H
2
O
●
●
●
●
1-12
HITs – Low Pressure
PC Board Mountable Pressure Sensor
PERFORMANCE SPECIFICATIONS
Supply Voltage: See application schematic
Ambient Temperature: 25°C (Unless otherwise specified)
PRESSURE RANGE
0 - 1 psi
PARAMETERS
Full Scale Output Span
Zero Pressure Output
Pressure Non-linearity
Pressure Hysteresis
Input & Output Resistance
Temperature Error – Span
Temperature Error – Zero
Thermal Hysteresis – Zero
Supply Current
Response Time (10% TO 90%)
Output Noise
Output Load Resistance
Insulation Resistance (50 VDC)
Long Term Stability
Pressure Overload
Operating Temperature
Storage Temperature
Media
Weight
Notes
1. Output span of unamplified sensor.
2.
3.
4.
5.
Compensation resistors are in an integral part of the sensor package;
no additional external resistors are required.
Best Fit Straight Line.
Temperature range: 0-50°C in reference to 25°C.
For a zero-to-full scale pressure step change.
9.
–40°C to +125°C
–50°C to +150°C
2
50
0.2
20
2500
0.1
0.01
4400
0.5
0.5
0.1
1.5
1.0
1.0
2
50
2.0
MIN
49.5
TYP
50
MAX
50.5
2
0.25
0.05
6000
1.0
1.0
2500
Model 1220 Low Pressure
0 - 10 in H
2
O
(Note 10)
MIN
24.75
TYP
25
MAX
25.25
2
0.05
0.01
4400
0.5
1.0
0.2
1.5
1.0
1.0
2.0
0.1
0.1
6000
1.0
3.0
UNITS
mV
+mV
±% Span
±% Span
Ω
±% Span
±% Span
±% Span
mA
mS
µV p-p
5
6
4
4
4
NOTES
1
2
3
Ω
Ω
psi
0.5
20
±% Span/yr
Non-corrosive Gases Compatible with Wetted Materials
3 Grams
9
6.
7.
8.
10 Hz to 1kHz.
Tube length: L=470 ± 5 mil, S=300 ± 3 mil, N=no tube.
Lead pins can either be in the same or the opposite direction as the
pressure tube. See Dimensions drawing for lead configurations.
Wetted materials are glass, ceramic, silicon, RTV, nickel, and aluminum.
10. 0-10" water column performance is based on testing at 1 psi full scale
pressure.
CONNECTIONS
ORDERING INFORMATION
APPLICATION SCHEMATIC
April 2000
HITs – Low Pressure
1-13
DSP and ARM Processors
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