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OCTOBER 1997
SURSENSETM Ultra Low Pressure Sensors
DCAL4 Series
Ratiometric 4-Volt Output High Accuracy Compensation Full Scale Pressure Ranges 0 to 1 in. H2O to 0 to 30 in. H2O 0 to 1 in. H2O to 0 to 30 in. H2O DESCRIPTION
The SURSENSETM line of ultra low pressure sensors is based upon a proprietary, patent applied for technology designed to reduce all output offset or common mode errors. These sensors utilize a silicon, micromachined sensing element which features a unique stress concentration enhanced structure to provide a highly stable linear output that is proportional to applied pressure. Output offset errors due to changes in temperature, warm-up, long term stability and position sensitivity have all been significantly reduced when compared to conventional sensors. The DCAL series sensors provide a precision calibrated ratiometric 4 -volt output with SURSENSE enhanced stability. Each sensor features the precision calibration found in the DCX series with the addition of fully integrated signal conditioning in an industry standard package. Intended to operate from a fixed 5Vdc supply, the DCAL4 gage pressure sensors provide a 0.25v to 4.25v output while the differential versions provide a 2.0 volt output centered on a 2.25 volt zero pressure offset. These highly stable sensors are ideally suited for microprocessor or microcontroller based systems.
APPLICATIONS
s Medical Instrumentation s HVAC s Environmental Controls s Portable Monitors
FEATURES
s Available in Gage and Differential Pressure Ranges s Temperature Compensated over 0C to 50C s Position Sensitivity to 5mV/g s Warm-up drift < 5mV s Long Term Stability < 10mV s Combined Linearity and Hysteresis Error < 0.25%FS s Custom Calibration Available
EQUIVALENT CIRCUIT
VEXCITATION (1)
PINOUT 1 VEXCITATION Common VOUTPUT VOFFSET
-
2
VOUTPUT (3)
+
3 4
VOFFSET (4) Common (2)
DCAL Series
SURSENSETM Ultra Low Pressure Sensors
DCAL401GN
Ratiometric 4-Volt Output High Accuracy Compensation 1 in. H2O Full Scale Pressure MAXIMUM RATINGS
PARAMETER MINIMUM MAXIMUM UNITS
Operating Temperature Range Storage Temperature Proof Pressure Burst Pressure Supply Current Output Source Current Output Sink Current Excitation Voltage Common Mode Pressure
-25 -40 100 200
85 125
C C in. H2O in. H2O
3 50
16
V psig
ELECTRICAL SPECIFICATIONS
PARAMETER, note 1 MINIMUM NORMAL MAXIMUM UNITS
Operating Pressure Range, gage pressure Output Span, note 2 Offset Voltage Temperature Effect on Offset (0C-50C), note 3 Combined Temperature Effect on Span (0C-50C), note 3 Offset Warm-up Shift, note 4 Offset Position Sensitivity (1g) Offset Long Term Drift (one year) Combined Linearity and Hysteresis Error, note 5 3.9 0.15
1.0 4.0 0.25 4.1 0.35 60 2 20 10 10 0.05 0.25
in. H2O V V mV %Span mV mV mV %FS
Note 1: Reference conditions (unless otherwise noted): Supply Voltage, VS = 5V DC, TA = 25C, Common Mode Line Pressure = 0 psig. Pressure measurements are with pressure applied to Port B. Note 2: The voltage added to the offset voltage at full scale pressure. Nominally the output voltage range is 0.25 to 4.25 volts. Note 3: Shift is relative to 25C. Note 4: Shift is within the first hour of excitation applied to the device. Note 5: Measured at one-half full scale rated pressure using best straight line curve fit.
DCAL Series
SURSENSETM Ultra Low Pressure Sensors
DCAL401DN
Ratiometric 4-Volt Output High Accuracy Compensation 1 in. H2O Full Scale Pressure MAXIMUM RATINGS
PARAMETER MINIMUM MAXIMUM UNITS
Operating Temperature Range Storage Temperature Proof Pressure Burst Pressure Supply Current Output Source Current Output Sink Current Excitation Voltage Common Mode Pressure
-25 -40 100 200
85 125
C C in H2O in H2O
3 50
16
V psig
ELECTRICAL SPECIFICATIONS
PARAMETER, note 1 MINIMUM NORMAL MAXIMUM UNITS
Operating Range, differential pressure Output Span, note 2 Offset Voltage @ zero differential pressure Temperature Effect on Offset (0C-50C), note 3 Combined Temperature Effect on Span (0C-50C), note 3 Offset Warm-up Shift, note 4 Offset Position Sensitivity (1g) Offset Long Term Drift (one year) Combined Linearity and Hysteresis Error, note 5 1.90 2.15
1.0 2.0 2.25 2.10 2.35 40 2 20 10 10 0.05 0.25
in. H2O V V mV %Span mV mV mV %FS
Note 1: Reference conditions (unless otherwise noted): Supply Voltage, VS = 5VDC, TA = 25C, Common Mode Line Pressure = 0 psig. Pressure measurements are with pressure applied to Port B. Note 2: The voltage added to the offset voltage at full scale pressure. Nominally the output voltage range is 0.25 to 4.25 volts. Note 3: Shift is relative to 25C. Note 4: Shift is within the first hour of excitation applied to the device. Note 5: Measured at one-half full scale rated pressure using best straight line curve fit.
DCAL Series
SURSENSETM Ultra Low Pressure Sensors
DCAL405GN
Ratiometric 4-Volt Output High Accuracy Compensation 5 in. H2O Full Scale Pressure MAXIMUM RATINGS
PARAMETER MINIMUM MAXIMUM UNITS
Operating Temperature Range Storage Temperature Proof Pressure Burst Pressure Output Source Current Output Sink Current Excitation Voltage Common Mode Pressure
-25 -40 150 300
85 125
C C in. H2O in. H2O
3 50
16
V psig
ELECTRICAL SPECIFICATIONS
PARAMETER, note 1 MINIMUM NORMAL MAXIMUM UNITS
Operating Pressure Range, gage pressure Output Span, note 2 Offset Voltage Temperature Effect on Offset (0C-50C), note 3 Combined Temperature Effect on Span (0C-50C), note 3 Offset Warm-up Shift, note 4 Offset Position Sensitivity (1g) Offset Long Term Drift (one year) Combined Linearity and Hysteresis Error, note 5 3.9 0.15
5.0 4.0 0.25 10 4.1 0.35 40 1 5 5 10 0.05 0.25
in. H2O V V mV %Span mV mV mV %FS
Note 1: Reference conditions (unless otherwise noted): Supply Voltage, VS = 5V DC, TA = 25C, Common Mode Line Pressure = 0 psig. Pressure measurements are with pressure applied to Port B. Note 2: The voltage added to the offset voltage at full scale pressure. Nominally the output voltage range is 0.25 to 4.25 volts. Note 3: Shift is relative to 25C. Note 4: Shift is within the first hour of excitation applied to the device. Note 5: Measured at one-half full scale rated pressure using best straight line curve fit.
DCAL Series
SURSENSETM Ultra Low Pressure Sensors
DCAL405DN
Ratiometric 4-Volt Output High Accuracy Compensation 5 in. H2O Full Scale Pressure MAXIMUM RATINGS
PARAMETER MINIMUM MAXIMUM UNITS
Operating Temperature Range Storage Temperature Proof Pressure Burst Pressure Output Source Current Output Sink Current Excitation Voltage Common Mode Pressure
-25 -40 150 300
85 125
C C in. H2O in. H2O
3 50
16
V psig
ELECTRICAL SPECIFICATIONS
PARAMETER, note 1 MINIMUM NORMAL MAXIMUM UNITS
Operating Range, differential pressure Output Span, note 2 Offset Voltage Temperature Effect on Offset (0C-50C), note 3 Combined Temperature Effect on Span (0C-50C), note 3 Offset Warm-up shift, note 4 Offset Position Sensitivity (1g) Offset Long Term Drift (one year) Combined Linearity and Hysteresis Error, note 5 1.90 2.15
5.0 2.0 2.25 +1 2.10 2.35 20 1 5 5 10 0.05 0.25
in. H2O V V mV %Span mV mV mV %FS
Note 1: Reference conditions (unless otherwise noted): Supply Voltage, VS = 5VDC, TA = 25C, Common Mode Line Pressure = 0 psig. Pressure measurements are with pressure applied to Port B. Note 2: The voltage added to the offset voltage at full scale pressure. Nominally the output voltage range is 0.25 to 4.25 volts. Note 3: Shift is relative to 25C. Note 4: Shift is within the first hour of excitation applied to the device. Note 5: Measured at one-half full scale rated pressure using best straight line curve fit.
DCAL Series
SURSENSETM Ultra Low Pressure Sensors
DCAL410GN
Ratiometric 4-Volt Output High Accuracy Compensation 10 in. H2O Full Scale Pressure MAXIMUM RATINGS
PARAMETER MINIMUM MAXIMUM UNITS
Operating Temperature Range Storage Temperature Proof Pressure Burst Pressure Output Source Current Output Sink Current Excitation Voltage Common Mode Pressure
-25 -40 150 300
85 125
C C in. H2O in. H2O
3 50
16
V psig
ELECTRICAL SPECIFICATIONS
PARAMETER, note 1 MINIMUM NORMAL MAXIMUM UNITS
Operating Pressure Range, gage pressure Output Span, note 2 Offset Voltage Temperature Effect on Offset (0C-50C), note 3 Combined Temperature Effect on Span (0C-50C), note 3 Offset Warm-up shift, note 4 Offset Position Sensitivity (1g) Offset Long Term Drift (one year) Combined Linearity and Hysteresis Error, note 5 3.9 0.15
10.0 4.0 0.25 3 4.1 0.35 20 1 5 1 10 0.05 0.25
in. H2O V V mV %Span mV mV mV %FS
Note 1: Reference conditions (unless otherwise noted): Supply Voltage, VS = 5V DC, TA = 25C, Common Mode Line Pressure = 0 psig. Pressure measurements are with pressure applied to Port B. Note 2: The voltage added to the offset voltage at full scale pressure. Nominally the output voltage range is 0.25 to 4.25 volts. Note 3: Shift is relative to 25C. Note 4: Shift is within the first hour of excitation applied to the device. Note 5: Measured at one-half full scale rated pressure using best straight line curve fit.
DCAL Series
SURSENSETM Ultra Low Pressure Sensors
DCAL410DN
Ratiometric 4-Volt Output High Accuracy Compensation 10 in. H2O Full Scale Pressure MAXIMUM RATINGS
PARAMETER MINIMUM MAXIMUM UNITS
Operating Temperature Range Storage Temperature Proof Pressure Burst Pressure Output Source Current Output Sink Current Excitation Voltage Common Mode Pressure
-25 -40 150 300
85 125
C C in. H2O in. H2O
3 50
16
V psig
ELECTRICAL SPECIFICATIONS
PARAMETER, note 1 MINIMUM NORMAL MAXIMUM UNITS
Operating Pressure Range, gage pressure Output Span, note 2 Offset Voltage Temperature Effect on Offset (0C-50C), note 3 Combined Temperature Effect on Span (0C-50C), note 3 Offset Warm-up shift, note 4 Offset Position Sensitivity (1g) Offset Long Term Drift (one year) Combined Linearity and Hysteresis Error, note 5 1.90 2.15
10.0 2.0 2.25 4 2.1 2.35 20 1 5 1 10 0.05 0.25
in. H2O V V mV %Span mV mV mV %FS
Note 1: Reference conditions (unless otherwise noted): Supply Voltage, VS = 5VDC, TA = 25C, Common Mode Line Pressure = 0 psig. Pressure measurements are with pressure applied to Port B. Note 2: The voltage added to the offset voltage at full scale pressure. Nominally the output voltage range is 0.25 to 4.25 volts. Note 3: Shift is relative to 25C. Note 4: Shift is within the first hour of excitation applied to the device. Note 5: Measured at one-half full scale rated pressure using best straight line curve fit.
DCAL Series
SURSENSETM Ultra Low Pressure Sensors
DCAL420GN
Ratiometric 4-Volt Output High Accuracy Compensation 20 in. H2O Full Scale Pressure MAXIMUM RATINGS
PARAMETER MINIMUM MAXIMUM UNITS
Operating Temperature Range Storage Temperature Proof Pressure Burst Pressure Output Source Current Output Sink Current Excitation Voltage Common Mode Pressure
-25 -40 300 450
85 125
C C in. H2O in. H2O
3 50
16
V psig
ELECTRICAL SPECIFICATIONS
PARAMETER, note 1 MINIMUM NORMAL MAXIMUM UNITS
Operating Pressure Range, gage pressure Output Span, note 2 Offset Voltage Temperature Effect on Offset (0C-50C), note 3 Combined Temperature Effect on Span (0C-50C), note 3 Offset Warm-up shift, note 4 Offset Position Sensitivity (1g) Offset Long Term Drift (one year) Combined Linearity and Hysteresis Error, note 5 3.9 0.15
20.0 4.0 0.25 7 4.1 0.35 20 1 5 1 10 0.05 0.25
in. H2O V V mV %Span mV mV mV %FS
Note 1: Reference conditions (unless otherwise noted): Supply Voltage, VS = 5V DC, TA = 25C, Common Mode Line Pressure = 0 psig. Pressure measurements are with pressure applied to Port B. Note 2: The voltage added to the offset voltage at full scale pressure. Nominally the output voltage range is 0.25 to 4.25 volts. Note 3: Shift is relative to 25C. Note 4: Shift is within the first hour of excitation applied to the device. Note 5: Measured at one-half full scale rated pressure using best straight line curve fit.
DCAL Series
SURSENSETM Ultra Low Pressure Sensors
DCAL420DN
Ratiometric 4-Volt Output High Accuracy Compensation 20 in. H2O Full Scale Pressure MAXIMUM RATINGS
PARAMETER MINIMUM MAXIMUM UNITS
Operating Temperature Range Storage Temperature Proof Pressure Burst Pressure Output Source Current Output Sink Current Excitation Voltage Common Mode Pressure
-25 -40 300 450
85 125
C C in. H2O in. H2O
3 50
16
V psig
ELECTRICAL SPECIFICATIONS
PARAMETER, note 1 MINIMUM NORMAL MAXIMUM UNITS
Operating Pressure Range, gage pressure Output Span, note 2 Offset Voltage Temperature Effect on Offset (0C-50C), note 3 Combined Temperature Effect on Span (0C-50C), note 3 Offset Warm-up shift, note 4 Offset Position Sensitivity (1g) Offset Long Term Drift (one year) Combined Linearity and Hysteresis Error, note 5 1.90 2.15
20.0 2.0 2.25 3 2.1 2.35 20 1 5 1 10 0.05 0.25
in. H2O V V mV %Span mV mV mV %FS
Note 1: Reference conditions (unless otherwise noted): Supply Voltage, VS = 5VDC, TA = 25C, Common Mode Line Pressure = 0 psig. Pressure measurements are with pressure applied to Port B. Note 2: The voltage added to the offset voltage at full scale pressure. Nominally the output voltage range is 0.25 to 4.25 volts. Note 3: Shift is relative to 25C. Note 4: Shift is within the first hour of excitation applied to the device. Note 5: Measured at one-half full scale rated pressure using best straight line curve fit.
DCAL Series
SURSENSETM Ultra Low Pressure Sensors
DCAL430GN
Ratiometric 4-Volt Output High Accuracy Compensation 30 in. H2O Full Scale Pressure MAXIMUM RATINGS
PARAMETER MINIMUM MAXIMUM UNITS
Operating Temperature Range Storage Temperature Proof Pressure Burst Pressure Output Source Current Output Sink Current Excitation Voltage Common Mode Pressure
-25 -40 450 750
85 125
C C in. H2O in. H2O
3 50
16
V psig
ELECTRICAL SPECIFICATIONS
PARAMETER, note 1 MINIMUM NORMAL MAXIMUM UNITS
Operating Pressure Range, gage pressure Output Span, note 2 Offset Voltage Temperature Effect on Offset (0C-50C), note 3 Combined Temperature Effect on Span (0C-50C), note 3 Offset Warm-up shift, note 4 Offset Position Sensitivity (1g) Offset Long Term Drift (one year) Combined Linearity and Hysteresis Error, note 5 3.9 0.15
30.0 4.0 0.25 4.1 0.35 20 1 5 1 10 0.05 0.25
in. H2O V V mV %Span mV mV mV %FS
Note 1: Reference conditions (unless otherwise noted): Supply Voltage, VS = 5V DC, TA = 25C, Common Mode Line Pressure = 0 psig. Pressure measurements are with pressure applied to Port B. Note 2: The voltage added to the offset voltage at full scale pressure. Nominally the output voltage range is 0.25 to 4.25 volts. Note 3: Shift is relative to 25C. Note 4: Shift is within the first hour of excitation applied to the device. Note 5: Measured at one-half full scale rated pressure using best straight line curve fit.
DCAL Series
SURSENSETM Ultra Low Pressure Sensors
DCAL430DN
Ratiometric 4-Volt Output High Accuracy Compensation 30 in. H2O Full Scale Pressure MAXIMUM RATINGS
PARAMETER MINIMUM MAXIMUM UNITS
Operating Temperature Range Storage Temperature Proof Pressure Burst Pressure Output Source Current Output Sink Current Excitation Voltage Common Mode Pressure
-25 -40 450 750
85 125
C C in. H2O in. H2O
3 50
16
V psig
ELECTRICAL SPECIFICATIONS
PARAMETER, note 1 MINIMUM NORMAL MAXIMUM UNITS
Operating Pressure Range, gage pressure Output Span, note 2 Offset Voltage Temperature Effect on Offset (0C-50C), note 3 Combined Temperature Effect on Span (0C-50C), note 3 Offset Warm-up shift, note 4 Offset Position Sensitivity (1g) Offset Long Term Drift (one year) Combined Linearity and Hysteresis Error, note 5 1.90 2.15
30.0 2.0 2.25 2.1 2.35 20 1 5 1 10 0.05 0.25
in. H2O V V mV %Span mV mV mV %FS
Note 1: Reference conditions (unless otherwise noted): Supply Voltage, VS = 5VDC, TA = 25C, Common Mode Line Pressure = 0 psig. Pressure measurements are with pressure applied to Port B. Note 2: The voltage added to the offset voltage at full scale pressure. Nominally the output voltage range is 0.25 to 4.25 volts. Note 3: Shift is relative to 25C. Note 4: Shift is within the first hour of excitation applied to the device. Note 5: Measured at one-half full scale rated pressure using best straight line curve fit.
DCAL Series
SURSENSETM Ultra Low Pressure Sensors APPLICATIONS INFORMATION
MEDIA CAPABILITY, WETTED MATERIALS (Apply clean dry air only) Pressure Port B Silicon diaphragm, glass filled nylon, and (High) alumina ceramic. Pressure measuring port. Pressure Port A Silicon diaphragm, glass filled nylon, (Low) and alumina ceramic. The vent port.
Pressure Compatibility:
Measures differential or gage pressure only with positive pressure to port B. There will be a small output voltage between the actual offset voltage and ground proportional to vacume if applied to port B.
Ratiometric Output:
The output voltage of the sensor is ratiometric, proportional, to the excitation voltage. For this model sensor all specifications will change proportionally to any changes in the excitation voltage. The excitation may vary between 3 to 16 volts. All specifications will nominally be change by a ratio of VEXCITATION/5.0 volts. For example: if the excitation voltage is 3.0 volts then both the full scale output voltage and the offset voltage would be 3/5th the specified value.
MOLDED PACKAGE DIMENSIONS
0.10 typical (2.54) 0.014 x 0.020 4 places for (0.0356 x 0.050) electrical connection 0.25 (0.64) 0.190 (4.8) 1.08 (27.4) 0.40 (10.0) Rivet mounting 0.14 (3.6), typical 0.48 (12.2) 0.55 (14.0) PINOUT: 1) VEXCITATION 2) Common 3) VOUTPUT 4) VOFFSET Dimensions in inches (mm) A Pin 1 2 3 4
Ordering Information
MODEL NO. DCAL401GN PACKAGE TYPE 1 in. H2O F. S. 1 in. H2O F. S. 5 in. H2O F. S. 5 in. H2O F. S. 10 in. H2O F. S. 10 in. H2O F. S. 20 in. H2O F. S. 20 in. H2O F. S. 30 in. H2O F. S. 30 in. H2O F. S.
1 0.41 (10.4)
DCAL401DN DCAL405GN DCAL405DN
B
DCAL410GN DCAL410DN
0.80 (20.3) 0.85 (21.6) 1.10 (27.9)
DCAL420GN DCAL420DN DCAL430GN DCAL430DN
An ISO9001 Certified Facility
1253 Reamwood Avenue Sunnyvale, CA 94089 1-800-333-3282
10/13/97
(c)1997 Data Instruments, The Data Instruments logo, and Sursense are trademarks of Data Instruments. Item #1114900. G&E, CA

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