Model 27 UltraStable
Medical Instrumentation
PC Board Mountable Pressure Sensor
0-100 mV Output
Gage Pressure
Wide Temperature Range
Calibration
Process Control
Factory Automation
Air Flow Management
Leak Detection
DESCRIPTION
The Model 27 is a high performance, temperature compensated,
piezoresistive silicon pressure sensor packaged in a bottom tube
TO-8 configuration. It provides excellent performance and
long-term stability.
Gage pressure ranges from 0-15 PSI to 0-250 PSI are
available. Integral temperature compensation is provided over a
range of -20°C to +85°C using laser-trimmed resistors. An
additional laser-trimmed resistor is included to normalize
pressure sensitivity variations by programming the gain of an
external differential amplifier. This provides sensitivity
interchangeability of ±1%.
Please refer to the low pressure section for information on
products with operating pressures less than 0-2 PSI. For an
uncompensated sensor (Model 25) please contact the factory for
FEATURES
TO-8 Package
-20°C to +85°C Compensated
Temperature Range
±0.1% Non-linearity
±0.5% Temperature Performance
1.0% Interchangeable Span
(provided by gain set resistor)
Solid State Reliability
Low Power
additional information.
DIMENSIONS
STANDARD RANGES
Range
0 to 15
0 to 30
0 to 50
0 to 100
0 to 250
psig
●
●
●
●
●
1-40
TO-8 – Wide Temperature Range
PC Board Mountable Pressure Sensor
PERFORMANCE SPECIFICATIONS
Supply Current:
1.5mA
Ambient Temperature:
25°C (Unless otherwise specified)
PARAMETERS
Full Scale Output Span, (without gain set resistor)
Zero Pressure Output
Pressure Non-linearity
Pressure Hysteresis
Input Resistance
Temperature Error – Span
Temperature Error – Zero
Temperature Coefficient - Resistance
Thermal Hysteresis – Zero
Short Term Stability of Offset
Short Term Stability of Span
Long Term Stability of Offset
Long Term Stability of span
Supply Current
Response Time (10% to 90%)
Output Noise
Output Load Resistance
Insulation Resistance (50 VDC)
Pressure Overload
Operating Temperature
Storage Temperature
Media
Weight
–40
°
C to +125
°
C
–50
°
C to +150
°
C
5
50
3X
0.5
2500
0.05
0.01
3500
0.3
0.1
0.145
0.05
0.05
0.05
0.1
0.1
1.5
1.0
1.0
2.0
MIN
75
TYP
100
MAX
150
2
0.1
0.1
4500
0.5
0.5
Model 27 UltraStable
UNITS
mV
±mV
±% Span
±% Span
NOTES
1
3
2
Ω
±% Span
±% Span
%/°C
±% Span
±% Span
±% Span
±% Span
±% Span
mA
msec
µV p-p
M
Ω
M
Ω
Rated
3, 4
3, 4
4
4
11
11
12
12
5
6
7
8
13
9, 14
Non-corrosive Gases Compatible with Wetted Materials
3 Grams
10
Notes
1. Output span of unamplified sensor.
2. Best Fit Straight Line.
3. For Model 27, compensation resistors are an integral part of the sensor
package; no additional external resistors are required. Pins 11 and 12
must be kept open. Model 27 is interchangeable only when used with a
gain stage.
4. Temperature range: -20°C to +85°C in reference to 25°C.
5. Guarantees input/output ratiometricity.
6. For a zero-to-full scale pressure step change.
7.
8.
9.
10.
11.
12.
13.
14.
10 Hz to 1 kHz.
Prevents increase of TC-Span due to output loading.
For top side application, 3X or 500 psi maximum, whichever is less. 20
psi for 2 psi and 5 psi versions.
Wetted materials are glass, ceramic, silicon, RTV, nickel, and gold.
Normalized offset bridge voltage: 7 days.
1 year.
Between case and sensing element.
For backside application, 3X not to exceed 100 psi on all ranges.
CONNECTIONS
ORDERING INFORMATION
27 - 015 G
Type (G = Gage)
Pressure Range
Model
APPLICATION SCHEMATIC
June 2001
TO-8 – Wide Temperature Range
Feel free to contact customer service with any questions at
Toll free 1(800)745-8008; Phone (757)766-1500; Fax (757)766-4297
1-41
PCB设计
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