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SDX...IND4 Series
Compensated pressure sensors in DIP package
FEATURES
* 0...5 and 0...10 "H2O * Low cost DIP * Temperature compensated * Calibrated zero and span * Small size * Low noise * High impedance for low power applications
GENERAL DESCRIPTION
The SDX...IND4 sensors will provide a very cost effective solution for pressure applications that require small size plus performance. These calibrated and temperature compensated sensors give an accurate and stable output over a 0C to 50C temperature range. This series is intended for use with non-corrosive, nonionic working fluids such as air, dry gases and the like. The SDX...IND4 devices are specifically designed to measure low pressures. They feature a 0 to 5 or 0 to 10 "H2O full scale range. The output of the bridge is ratiometric to the supply voltage and operation from any D.C. supply voltage up to +20 V is acceptable. The SDX...IND4 devices feature an integrated circuit sensor element and laser trimmed thick film ceramic housed in a compact solvent resistant case. The package is a double wide (i.e., 0.600" lead spacing) dual-inlinepackage. This is the same familiar package used by IC manufacturers except that is has a pressure port(s). Scale: 1 cm 1/2 inch
APPLICATIONS
* Medical equipment * Computer peripherals * Pneumatic controls * HVAC
The PC board area used by each DIP is approximately 0.26 square inches. This extremely small size enables the use of multiple sensors in limited available space. The DIP provides excellent corrosion resistance and isolation to external package stress. The DIP mounts on a PC board like a standard IC with through-hole pins. The pins anchor the pressure sensor to the PC board and provide a more secure and stable unit than other types of packages.
EQUIVALENT CIRCUIT
ELECTRICAL CONNECTION
V
out + GND out -
1
P1 P2
4
+Vs
-out
+out
Top view
Note: The polarity identicated is for pressure applied to backward gage.
December 2002 / 551
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Aubinger Weg 27, 82178 Puchheim, Germany Phone: +49 (0)89 80083-0, Fax: +49 (0)89 80083-33 http://www.sensortechnics.com
SDX...IND4 Series
Compensated pressure sensors in DIP package
PRESSURE SENSOR CHARACTERISTICS (all devices)
Maximum ratings Supply voltage VS Lead temperature (soldering 4 sec.) +20 VDC 250C Environmental specifications Temperature ranges Compensated Operating Storage Humidity limits (non condensing) 0C to 50C -20C to +85C -40C to +125C 0 to 95% RH
STANDARD PRESSURE RANGES
Part number
SDX005IND4 SDX010IND4
Operating pressure
0...5 "H2O 0...10 "H2O
Proof pressure
200 "H2O 200 "H2O
Burst pressure
7 psi 7 psi
Common mode pressure
50 psig 50 psig
PERFORMANCE CHARACTERISTICS1
Characteristics
Zero pressure offset Full scale span2 Temp. effects (0C to 50C)4 Combined linearity and hysteresis3 Repeatability5 Long term stability of offset and span10 Response time 9 Input impedance6 Output impedance7 Common mode voltage8 SDX005IND4 SDX010IND4 Offset Span
Min.
-1.0 19.5 24.5 ----------------1.5
Typ.
0 20.0 25.0 0.2 0.4 0.2 0.1 0.1 100 4.0 4.0 3.0
Max.
1.0 20.5 25.5 0.6 2.0 1.0 ----------5.0
Unit
mV
%FSO mV s k V DC
Specification notes:
1. Reference conditions (unless otherwise noted): supply voltage, VS = 12VDC; TA = 25C; common mode line pressure = 0 psig; pressure applied to port 2. 2. Span is the algebraic difference between the output voltage at full scale pressure and the output at zero pressure. Span is ratiometric to the supply voltage. 3. Hysteresis is the maximum output difference at any point within the operating pressure range for increasing and decreasing pressure. 4. Maximum error band of the offset voltage and the error band of the span, relative to the 25C regarding. 5. Difference in output at any pressure with the operating pressure range and temperature within 0C to +50C after: a) 100 temperature cycles, 0C to +50C. b) 1.0 million pressure cycles, 0 psi to full scale span. 6. Input impedance is the impedance between VS and ground. 7. Output impedance is the impedance between the + and - outputs. 8. This is the common mode voltage of the output arms for VS = 12 VDC. 9. Response time for a 0 psi to full scale span pressure step change, 10 % to 90 % rise time. 10. Long term stability over a one year period.
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December 2002 / 551
Aubinger Weg 27, 82178 Puchheim, Germany Phone: +49 (0)89 80083-0, Fax: +49 (0)89 80083-33 http://www.sensortechnics.com
SDX...IND4 Series
Compensated pressure sensors in DIP package
PHYSICAL DIMENSIONS
D4-housing
4
.470 (11.94) O .090 (2.29) typ.
1
SENSYM P1
.550 (13.97)
.300 (7.62) .430 (10.92) typ.
compensation circuit
.120 (3.05) typ.
.500 (15.24) typ.
.010 (.25) typ.
.100 (2.54) typ.
mass: 2 g
dimensions in inches (mm)
GENERAL DISCUSSION
The SDX...IND4 series devices give a voltage output which is directly proportional to applied pressure. The gage devices will give an increasing positive going output when increasing pressure is applied to the pressure port. The devices are ratiometric to the supply voltage and changes in the supply voltage will cause proportional changes in the offset voltage and full scale span.
December 2002 / 551
.110 (2.79) typ.
.020 (0.51) typ.
.335 (8.50) typ.
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Aubinger Weg 27, 82178 Puchheim, Germany Phone: +49 (0)89 80083-0, Fax: +49 (0)89 80083-33 http://www.sensortechnics.com
SDX...IND4 Series
Compensated pressure sensors in DIP package
PNEUMATIC INTERFACE
The DIP also provides convenient mounting and pressure ports for ease of use with standard 1/16" ID, 1/8" OD, 1/32" wall, flexible plastic tubing for pressure connection. The small tubing has several advantages over larger tubing commonly used with pressure sensors: 1) The tubing can be formed in a much smaller radius with-out kinking. 2) The tubing is easier to handle. 3) The tubing is available in a variety of colors such as clear, white, yellow, blue, green, etc. to enable color coding of pneumatic circuits with multiple pressure sensors in the same way that wiring harnesses are color coded in electrical circuits. This greatly simplifies troubleshooting. 4) Less stress is placed on the pressure sensor package resulting in less potential for offset shifts. 5) Less physical space is required for the small tubing. 6) The lower volume of air in the small tubing results in faster pressure sensor response.
USER CALIBRATION
The SDX...IND4 devices are fully calibrated for offset and span and should therefore require little user adjustment in most applications. For more precise span and offset adjustments, contact the factory.
MEDIA COMPATIBILITY
SDX...IND4 devices are compatible with most non-corrosive gases. For questions concerning media compatibility, contact the factory.
APPLICATION INFORMATION
Application information found in the section "Application Notes" and on the SCX series data sheet in the "Sensortechnics pressure sensors, transducers and transmitters handbook".
ORDERING INFORMATION
Pressure range
0 - 5 "H2O 0 - 10 "H2O
Differential / Gage
SDX005IND4 SDX010IND4
Sensortechnics and Sensym reserve the to make changes to any products herein. Sensortechnics and Sensym do 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.
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December 2002 / 551
Aubinger Weg 27, 82178 Puchheim, Germany Phone: +49 (0)89 80083-0, Fax: +49 (0)89 80083-33 http://www.sensortechnics.com

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