Datasheet Differential Pressure Sensor SDP11080 pages

SDP1108/SDP2108 Low Differential Pressure Sensor with fast response time - For medical ventilators (ICU and home care) - High sensitivity below 10 Pa to measure small volume flow (neonatal) - Fast response time for efficient trigger function - Unsurpassed performance thanks to CMOSens® technology - Offset and hysteresis free - Fully calibrated and temperature compensated - Not sensitive to the mounting orientation and vibrations SDPx108 Product Summary The SDPx108 sensor family is a differential pressure sensor for air based on the successful SDP1000/ SDP2000 sensor from Sensirion AG. The response time of the SDPx108 has been optimized for medical ventilation applications. Mounted in a rugged, chemically inert PPS housing the SDPx108 differential pressure sensors feature a unique dynamic range, zero offset and unsurpassed long term stability. This makes it an ideal fit for demanding yet cost sensitive OEM applications in medical and HVAC equipment. The SDPx108 is fully RoHS compliant. The SDPx108 is supplied with 5.0 V and provides a 0.25...4.0 V output. Although the output of the sensor is analog, the internal linearization and temperature compensation is performed digitally. This results in a superior accuracy, outstanding resolution (up to 0.05 Pa), and lowest temperature dependence. Its leading performance is based on Sensirion's proprietary CMOSens® sensor technology which combines the sensor element with amplification and A/D conversion on one single silicon chip. The differential pressure is measured by a thermal sensing element. In contrast to other thermal differential pressure sensors only a very small amount of air is required. This leads to a reliable operation even under harsh conditions. In comparison to membrane and piezo-resistive based sensors the SDPx108 differential pressure sensors show an extended measurement range, better offset stability and improved reproducibility even at lowest pressure ranges. In addition the SDPx108 is robust against pressure bursts and shows no sensitivity to the mounting orientation. Applications Medical applications:  Homecare ventilation Օ Intensive care ventilation (ICU)  Other Block Diagram Pin 3: OUT 0.25 V to 4 V CMOSens® SENSOR CHIP o E CD Pin 2: GND ! ! .՗ CD s_ c !E5 o CD E7)  <D & ■o 2> o Q1|É 2 CD > O O Pin 1: Vdd5.0 V www.sensirion.com Version 1.1 - June 2010 1/7