DIGITAL OUTPUT PRESSURE SENSORS Enhanced Digital Output Sensors Features 5 H O to 100psi Pressure Ranges 2 All Combined Errors Over Temperature Less Than 0.1%, Typical Wide -20 to 85C Compensated Temperature Range Electrically Compatible to All Sensors GA142 Series Enhanced Dual Serial Interface Mode Applications Medical Instrumentation Environmental Controls HVAC Meteorology General Description The Digital Output pressure sensors are based upon a proprietary surface mapping technology to produce a fully digital output that virtually eliminates all repeatable errors over temperature and pressure. This series provides a 12 bit digital serial output (14 bit in High Resolution Mode) with superior offset, span and linearity characteristics. The output is SPI and MICROWIRE/PLUS compatible as well as fully compatible with the All Sensors GA142 Series sensors. In addition to synchronous communications, the Digital Output pressure sensors incorporates a bi-directional, TTL level, asynchronous serial interfaces mode (hardware selectable 9,600 or 19,200 baud). This mode includes a command set that allows the host to interrogate the sensor for model information, pressure range, serial number, pressure units and conversion factor. The command set also allows the host to select a high resolution output mode, make minor adjustments to offset and has an addressable feature that alows multiple sensors to be tied to the same interface buss. This series is intended for use with non-corrosive, non-ionic working fluids such as air, dry gases and the like. All signals are 5V TTL/CMOS compatible. Physical Dimensions Pin Descriptions Pin Label Description Pin Size 0.25 0.10 Typical 1 Vcc +5V power supply input 0.010 x 0.020 (6.4) (2.54) (0.25 x 0.50) 2 Data/SI Data output for synchronous Pin 1 23456 0.174 to 0.190 mode. Serial in for asynchro- (4.4 to 4.8) nous mode. 0.21 1 (5.3) 3 Clock/SO Clock output for synchronous mode. Serial out for asynchro- A 0.414 nous mode. (10.5) 1.08 (27.4) 4 Ready/Mode Ready output for synchronous 0.63 mode. Selects asynchronous B (16.0) mode when held low during reset. 5 Convert/BR Convert input for synchronous 0.48 0.55 0.80 mode. Selects one of two (12.2) (14.0) (20.3) baud rates for asynchronous NOTES: 0.85 mode (low=9,600, 1) Dimensions in inches (millimeters) (21.6) high=19,200). 1.10 (27.9) 6 Ground Ground for power and signals All Sensors DS-0012 Rev A 0101 010101 a 16035 Vineyard Blvd. Morgan Hill, CA 95037 p 408 225 4314 f 408 225 2079 e www.allsensors.com all sensorsall sensorsall sensorsall sensorsall sensorsAbsolute Maximum Ratings Environmental Specifications Supply Voltage (Vcc) 7Vdc Operating Voltage +4.75Vdc to +5.25Vdc Voltage on Any Pin with Respect to Gnd -0.6 to Vcc+0.6V Compensated Temperature -20 C to +85 C Common-mode pressure 50 psig Operating Temperature -25 to +90 C Lead Temperature (soldering 2-4 sec.) 250C Storage Temperature -40 to 125 C Humidity Limits 0 to 95% RH (non condensing) Standard Pressure Ranges (2) (4) Part Number Operating Pressure Units FSO Digital Span Proof Pressure Burst Pressure 5 INCH-D-DO -5 to 5 inH2O 5 1 200 inH2O 300 inH2O 10 INCH-D-DO -10 to 10 inH2O 10 1 200 inH2O 300 inH2O 1 PSI-D-DO -1 to 1 PSI 1 1 200 inH2O 300 inH2O 5 PSI-D-DO -5 to 5 PSI 5 1 10 PSI 30 PSI 15 PSI-D-DO -15 to 15 PSI 15 1 60 PSI 120 PSI 15 PSI-A-DO 0 to 15 PSIA 15 2 60 PSI 120 PSI 30 PSI-D-DO -30 to 30 PSI 30 2 90 PSI 150 PSI 30 PSI-A-DO 0 to 30 PSIA 30 2 90 PSI 150 PSI 100 PSI-D-DO -100 to 100 PSI 100 2 200 PSI 250 PSI 100 PSI-A-DO 0 to 100 PSIA 100 2 200 PSI 250 PSI General Performance Characteristics (All Models) (1) Parameter Minimum Nominal Maximum Units Resolution 12 -- -- Bit Conversion Speed -- 8 16 mS Supply Current -- 8 12 mA Performance Characteristics for 5 INCH-D-DO (1) Parameter Minimum Nominal Maximum Units (5) Overall Accuracy -- 0.25 0.5 %FSO Long Term Drift (one year) -- -- 0.5 %FSO Offset Position Sensitivity (1g) -- -- 0.05 %FSO (3) Offset Warm-up Shift -- -- 0.25 %FSO Performance Characteristics for 10 INCH-D-DO and 1 PSI-D-DO (1) Parameter Minimum Nominal Maximum Units (5) Overall Accuracy -- 0.25 0.5 %FSO Long Term Drift (one year) -- -- 0.5 %FSO Offset Position Sensitivity (1g) -- -- 0.03 %FSO (3) Offset Warm-up Shift -- -- 0.25 %FSO 020202 Digital Output Pressure Sensors 0202