ASDX Pressure Sensor
ASDX Pressure Sensor
ASDX Pressure Sensor
pressure over the specified full scale pressure span and temperature range. The ASDX is fully calibrated and temperature compensated for sensor offset, sensitivity, temperature effects and non-linearity using an on-board Application Specific Integrated Circuit (ASIC). Calibrated output values for pressure are updated at approximately 1 kHz. The standard ASDX is calibrated over the temperature range of 0 C to 85 C [32 F to 185 F]. The sensor is characterized for operation from a single power supply of either 3.3 Vdc or 5.0 Vdc. FEATURES Output options: I2C- or SPI-compatible 12-bit digital Precision ASIC conditioning and temperature compensated over 0 C to 85 C [32 F to 185 F] temperature range Low operating voltage Absolute, differential and gage types Pressure ranges from 10 inches H20 to 100 psi Standard calibrations in inches H20, cm H20, psi, mbar, bar, kPa Total error band of 2.0% of full scale span maximum RoHS compliant
These sensors are available to measure absolute, differential and gage pressures. The absolute versions have an internal vacuum reference and an output value proportional to absolute pressure. Differential versions allow application of pressure to either side of the sensing diaphragm. Gage versions are referenced to atmospheric pressure and provide an output proportional to pressure variations from atmosphere. The ASDX Series sensors are intended for use with noncorrosive, non-ionic working fluids such as air and dry gases. They are designed and manufactured according to standards in ISO 9001.
POTENTIAL APPLICATIONS Flow calibrators Ventilation and air flow monitors Gas flow instrumentation Sleep apnea monitoring and therapy equipment Barometry Pneumatic controls HVAC
Table 1. Absolute Maximum Ratings1 Parameter Supply voltage (Vsupply) Voltage to any pin Digital clock frequency: I2 C SPI ESD susceptibility (human body model) Storage temperature Lead temperature (2 s to 4 s) External capacitance between Vsupply and ground2 Table 2. Operating Specifications Parameter Supply voltage: (Vsupply)3 3.3 Vdc 5.0 Vdc
Sensors are either 3.3 Vdc or 5.0 Vdc per the Order Guide (see Figure 1).
Max 6.0 Vsupply + 0.3 400 800 125 [257] 250 [482] 470
Supply current Compensated temperature range5 Operating temperature range6 Overpressure7 Burst pressure8 Startup time (power up to data ready) Response time I2C or SPI voltage level low I2C or SPI voltage level high Pull-up on SDA and SCL (I2C output only) Total error band9 Output resolution Table 3. Environmental Specifications Parameter Humidity Vibration Shock Life Table 4. Wetted Materials11 Parameter Covers Adhesives Electronic components
0.8 1 12
3.5 5.0 85 [185] 105 [221] 2X operating pressure range minimum 3X operating pressure range minimum 2.8 7.3 0.46 0.2 2.0 -
Port 2 (Reference Port)12 glass-filled PBT silicone and epoxy silicon, glass, and gold
Notes: 1. Absolute maximum ratings are the extreme limits that the device will withstand without damage to the device. 2. An external bypass capacitor is required across the supply voltage (Pins 6 and 3 see Figure 4) as close to the sensor supply pin as possible for correct sensor operation. 3. Ratiometricity of the sensor (the ability of the output to scale to the input voltage) is achieved within the specified operating voltage for each option. Other custom supply voltages are available, please contact Honeywell Customer Service. 4. The sensor is not reverse polarity protected. Incorrect application of excitation voltage or ground to the wrong pin may cause electrical failure. 5. The compensated temperature range is the temperature range (or ranges) over which the sensor will produce an output proportional to pressure within the specified performance limits. 6. The operating temperature range is the temperature range over which the sensor will produce an output proportional to pressure but may not remain within the specified performance limits. 7. Overpressure is the maximum pressure which may safely be applied to the product for it to remain in specification once pressure is returned to the operating pressure range. Exposure to higher pressures may cause permanent damage to the product. 8. Burst pressure is the maximum pressure that may be applied to any port of the product without causing escape of pressure media. Product should not be expected to function after exposure to any pressure beyond the burst pressure. 9. Total error band is the maximum deviation in output from ideal transfer function over the entire compensated temperature and pressure range. Includes all errors due to offset, full scale span, pressure non-linearity, pressure hysteresis, repeatability, thermal effect on offset, thermal effect on span and thermal hysteresis. Specification units are in percent of full scale span (%FSS). 10. Full scale span (FSS) is the algebraic difference between the output signal measured at the maximum (Pmax.) and minimum (Pmin.) limits of the pressure range. 11. Consult Honeywell Customer Service for detailed material information. 12. For AC pressure port configuration, the pressure and reference ports are reversed. 2 www.honeywell.com/sensing
ASDX
Series
__
X _____
_
Power Supply Voltage
3 = 3.3 Vdc 5 = 5.0 Vdc
Pressure Port
AV = Axial port on top, vented cover on bottom
Output Type15
S = SPI 2 2 = I C, Address 0x28 2 3 = I C, Address 0x38 4 = I C, Address 0x48 5 = I C, Address 0x58 RR = Radial port on top, radial port on bottom 6 = I C, Address 0x68 7 = I C, Address 0x78
2 2 2 2
Future Option
Notes: 13. Other package combinations are possible, please contact Honeywell Customer Service. 14. The transfer function limits define the output of the sensor at a given pressure input. By specifying the output signal at the maximum (Pmax.) and minimum (Pmin.) limits of the pressure range, the complete transfer curve for the sensor is defined. See Figure 2 for a graphical representation of each calibration. For the 12-bit digital output, Table 6 provides the output of the sensor at significant percentages. These outputs are valid at the rated input voltage of the sensor. 15. The output type defines which communication protocol the sensor uses to communicate. Available protocols are I 2C or half duplex SPI (sensor acts only as a slave). This communication protocol is not field selectable, and must be defined when ordering the sensor. 16. Custom pressure ranges are available, please contact Honeywell Customer Service. 17. The pressure units (inches H20, cm H20, psi, mbar, bar, kPa) define the units used during calibration and in the application. 18. See Table 5 for an explanation of sensor types. Honeywell Sensing and Control 3
Table 5. Sensor Types Type Absolute Gage Differential Description Output is proportional to difference between applied pressure and built-in reference to vacuum (zero pressure). Output is proportional to difference between applied pressure and atmospheric (ambient) pressure. Output is proportional to difference between pressure applied to each of the pressure ports (Port 1 Port 2).
Figure 2. Transfer Functions and Limits A Calibration, 10% to 90% B Calibration, 5% to 95%
Table 6. Sensor Output at Significant Percentages % Output Digital Counts (dec) 0% 0 5% 819 10% 1638 50% 8192 90% 14746 95% 15565 100% 16383 Figure 3. Completed Catalog Listing Example ASDXAVX001PG2A3: AV pressure port, 1 psi gage, I2C output (Address 0x28), 10% to 90% calibration at 3.3 Vdc operation.
Digital Counts (hex) 0x0000 0x0333 0x0666 0x2000 0x399A 0x3CCD 0x3FFF
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Figure 4. Dimensional Drawings (For reference only: mm [in].) RR Package (Legacy D4) AV Package (Legacy G2)
RV Package
Table 7. Pinout
Pin 1 2 3 4 5 6 7 8 Definition SDA SCL GND N/C SS Vsupply N/C N/C I2C Type digital I/O digital input supply not used digital output supply not used not used Description serial bidirectional data; data is clocked in or out on clock edge of SCL serial clock input; used to clock data on SDA power supply ground do not connect in the application interrupt signal (conversion complete output) power supply source do not connect in the application do not connect in the application Pin 1 2 3 4 5 6 7 8 Definition MISO SCK GND N/C SS Vsupply N/C N/C SPI Type digital output digital input supply not used digital input supply not used not used Description Master In Slave Out - serial output data; data is clocked out on clock edge of SCK serial clock input; used to clock data on MISO power supply ground do not connect in the application slave select power supply source do not connect in the application do not connect in the application
WARNING
PERSONAL INJURY DO NOT USE these products as safety or emergency stop devices or in any other application where failure of the product could result in personal injury. Failure to comply with these instructions could result in death or serious injury. WARRANTY/REMEDY Honeywell warrants goods of its manufacture as being free of defective materials and faulty workmanship. Honeywells standard product warranty applies unless agreed to otherwise by Honeywell in writing; please refer to your order acknowledgement or consult your local sales office for specific warranty details. If warranted goods are returned to Honeywell during the period of coverage, Honeywell will repair or replace, at its option, without charge those items it finds defective. The foregoing is buyers sole remedy and is in lieu of all other warranties, expressed or implied, including those of merchantability and fitness for a particular purpose. In no event shall Honeywell be liable for consequential, special, or indirect damages. While we provide application assistance personally, through our literature and the Honeywell web site, it is up to the customer to determine the suitability of the product in the application. Specifications may change without notice. The information we supply is believed to be accurate and reliable as of this printing. However, we assume no responsibility for its use.
WARNING
MISUSE OF DOCUMENTATION The information presented in this product sheet is for reference only. Do not use this document as a product installation guide. Complete installation, operation, and maintenance information is provided in the instructions supplied with each product. Failure to comply with these instructions could result in death or serious injury. SALES AND SERVICE Honeywell serves its customers through a worldwide network of sales offices, representatives and distributors. For application assistance, current specifications, pricing or name of the nearest Authorized Distributor, contact your local sales office or: E-mail: info.sc@honeywell.com Internet: www.honeywell.com/sensing Phone and Fax:
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008095-11-EN IL50 GLO Printed in USA July 2010 Copyright 2010 Honeywell International Inc. All rights reserved.