asdx do series digital output pressure sensors 0 psi to 1 psi through 0 psi to 30 psi description the asdx do series pressure sensors are fully calibrated and temperature compensated with on-board application specific integrated circuitry (asic). these dip (dual in-line package) sensors provide digital correction of sensor offset, sensitivity, temperature coefficients and non-linearity and are designed for use with non-corrosive, non-ionic working fluids such as air and dry gases. the asdx do series uses i 2 c-compatible protocol, which allows easy interfacing to most commonly used microcontrollers and microprocessors, without additional components and electronic circuitry. the 2-wire i 2 c interface has a serial clock line (scl) input and serial digital output data line. sensor output is a corrected pressure value in hexadecimal format with 12-bit resolution. sensors are available to measure absolute, differential and gage pressures. the absolute versions have an internal vacuum reference and an output voltage proportional to absolute pressure. differential versions allow application of pressure to either side of the sensing diaphragm and may be used for differential or gage measurements. all asdx do sensors are accurate to within 2.0% full scale and are designed for operation from a single 5 vdc supply. features ? i 2 c-compatible protocol ? asic-enhanced output ? calibrated and temperature-compensated output ? wide compensated temperature range 0 c to 85 c [32 f to 185 f] ? available in absolute, differential and gage types ? pressure ranges from 0 psi to 1 psi through 0 psi to 30 psi ? response time of 8 ms potential applications ? flow calibrators ? ventilation and air flow monitors ? gas flow instrumentation ? dialysis equipment ? sleep apnea monitoring and therapy equipment ? barometry ? hvac controls ? pneumatic controls
asdx do series 2 www.honeywell.com/sensing table 1. general specifications characteristic parameter characteristic parameter supply voltage (vs) (1) 4.75 vdc to 5.25 vdc compensated temp. range 0 c to 85 c [32 f to 185 f] maximum supply voltage (1) 6.50 vdc (max.) operating temp. range -20 c to 105 c [-4 f to 221 f] consumption current 6 ma (typ.) storage temp. range -40 c to 125 c [-40 f to 257 f] output current (sink) 2 ma (max.) vibration 10 g at 20 hz to 2000 hz output current (source) 2 ma (max.) shock 100 g for 11 ms lead soldering temperature 2 s to 4 s at 250 c [482 f] life 1 million cycles minimum note: 1. the sensor is not reverse polarity protected. incorrect application of excitation voltage or ground to the wrong pin can cause electrical failure. application of supply voltage above the maximum can cause electrical failure. table 2. performance characteristics characteristic symbol min. typ. max. unit note 4r do 1, 2 zero pressure offset hoff 158 19a 1db counts hex ? full scale span (fss) hfss ? ccc ? counts hex 3 output at full scale pressure hfso e25 e66 ea8 counts hex ? accuracy ? ? ? 2.0 %h full scale 4 response time ? ? 8 11 ms 5 4r do 1, 2 zero pressure offset hoff 7be 800 841 counts hex ? full scale span (fss) hfss ? ccc ? counts hex 3 output at full scale pressure (p2) hfso e25 e66 eb8 counts hex 6 output at full scale pressure (p1) hfso 158 19a 1db counts hex 6 accuracy ? ? ? 2.0 % fss 4 output resolution ? ? 12 ? bit ? response time ? ? 8 11 ms 5 notes: 1. reference conditions (unless otherwise noted): supply voltage, v s =5.0 0.01 vdc, ta=25 c [77 f]. 2. read operation: start, slave address, r/w =1, data byte 1 (msb), ackn bit, data byte 2 (lsb) . the output is corrected pressure as unsigned 12 bits. slave address is f0h. acknowledge bit - pull data line low, master generates an extra clock pulse for this purpose. 3. span is the algebraic difference between the output voltage at the specified high pressure and the output at lowest pressure. s pan is ratiometric to the supply voltage. 4. accuracy is the combined errors from offset and span calibration, linearity, pressure hysteresis, and temperature effects. cali bration errors include the deviation of offset and full scale from nominal values linearity is the measured deviation based on a straight line. hysteresis is the maxim um output difference at any point within the operating pressure range for increasing and decreasing pressure and temperature. 5. response time for 0 psi to full scale pressure step change, 10% to 90% rise time. 6. sensor output when maximum positive pressure is applied on the back side (p2) or the front side (p1) of the sensing element. table 3. pressure range specifications catalog listing pressure range burst pressure (1) asdx001xxxx-do 0 psi to 1 psi 5 psi asdx005xxxx-do 0 psi to 5 psi 20 psi asdx015xxxx-do 0 psi to 15 psi 30 psi asdx030xxxx-do 0 psi to 30 psi 60 psi note: 1. if maximum burst pressure is exceeded, even momentarily, the packa ge may leak or burst, or the pressure sensing die may fractur e. figure 1. performance characteristics (error band multiplier over -20 c to 105 c [-4 f to 221 f]) figure 2. serial interface timing characteristics
digital output pressure sensors, 0 ps i to 1 psi thru 0 psi to 30 psi honeywell sensing and control 3 figure 3. pinout (1, 2) asdxxxxa2do asdxxxxd4do asdxxxxg2do notes: 1. n/c means no connection. connecting to ground will damage the sensor. 2. pin 6 must be left open. table 4. serial interface parameters parameter symbol condition min. typ. max. unit input high level v ih ? 4.5 ? 1 vs input low level v il ? 0 ? 0.5 vs output low level v ol open drain i ol = -4 ma ? ? 0.1 vs pull up current v oh pin scl and sda 5 ? 20 a load capacitance sda cl sda ? ? ? 400 pf scl clock frequency f scl ? ? ? 100 khz bus free time between stop and start condition t buf ? 4.7 ? ? s hold time (repeated) start condition t hd, sta to first clock pulse 4.0 ? ? s low period of scl t low ? 4.7 ? ? s high period of scl t high ? 4.0 ? ? s setup time repeated start condition t su, sta ? 4.7 ? ? s data hold time t hd, dat ? 0 ? ? ns data setup time t su, dat ? 250 ? ? ns rise time of both sda and scl t r ? ? ? 300 ns fall time of both sda and scl t f ? ? ? 300 ns setup time for stop condition t su, sto ? 4 ? ? s input filter spike suppression t sp spikes on sda or scl of that length are suppressed ? ? 50 s figure 4. dimesional drawing (for reference only: mm [in].) a2 package d4 package g2 package figure 5. block diagram note: 1. 220 nf capacitor is required between +vs and gnd.
sensing and control honeywell 1985 douglas drive north golden valley, minnesota 55422 www.honeywe ll.com/sensing 008095-5-en il50 glo printed in usa december 2007 copyright ? 2007 honeywell international inc. all rights reserved. figure 6. nomenclature tree order guide differential catalog listing (1) gage catalog listing absolute catalog listing pressure range output asdx001d44r-do asdx001g24r-do ? 0 psi to 1.0 psi 19a ? e66 asdx001d44d-do ? ? ? 800 600 ASDX005D44R-DO asdx005g24r-do ? 0 psi to 5.0 psi 19a ? e66 asdx005d44d-do ? ? ? 800 600 asdx015d44r-do asdx015g24r-do asdx015a24r-do 0 psi to 15 psi 19a ? e66 asdx015d44d-do ? ? ? 800 600 asdx030d44r-do asdx030g24r-do asdx030a24r-do 0 psi to 30 psi 19a ? e66 asdx030d44d-do ? ? ? 800 600 note: 1. may also be used in gage applications. 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. honeywell?s 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 buyer?s 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: asia pacific +65 6355-2828; +65 6445-3033 fax europe +44 (0) 1698 481481; +44 (0) 1698 481676 fax latin america +1-305-805-8188; +1-305-883-8257 fax usa/canada +1-800-537-6945; +1-815-235-6847 +1-815-235-6545 fax
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