Datasheet SDP2000-L Differential Pressure Sensor with Analog Output  Calibrated and temperature compensated  Excellent repeatability, no drift Product Summary The SDP2000-L differential pressure sensor for air covers a measurement range of 3500 Pa (14 inch H2O). Mounted in a PPS housing the SDP2000-L differential pressure sensor features 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 HVAC and medical equipment. The device is supplied with 5 V and provides a 0.25…4 V output. Although the output of the SDP2000-L differential pressure sensor is analog, the internal linearization and temperature compensation is performed digitally. This results in superior accuracy, outstanding resolution, and lowest temperature dependence. The outstanding performance of the sensor is based on Sensirion’s patented CMOSens® sensor technology, which combines the sensor element, signal processing and digital calibration on a small CMOS chip. The differential pressure is measured by a thermal sensor element using flow-through technology. The well-proven CMOS technology is perfectly suited for high-quality mass production and is the ideal choice for demanding and cost-sensitive OEM applications. Benefits of Sensirion’s CMOSens® Technology      High reliability and long-term stability Best signal to noise ratio Industry-proven technology with a track record of more than 15 years Designed for mass production High process capability

1. Sensor Performance Table 1: Sensor specifications (at 23°C and Pabsoiute = 966 mbar, VDD = 5.0 V unless otherwise noted)

1.1 Temperature Compensation The SDP2000-L differential pressure sensor features a sophisticated built-in temperature compensation circuit. The temperature is measured on the CMOSens chip by means of a bandgap reference temperature sensor. Its data is fed into a compensation circuit which is also integrated on the CMOSens ® sensor chip. No external temperature compensation is therefore required. 1.2 Altitude Correction The SDP2000-L differential pressure sensor achieves its unsurpassed performance by using a dynamic measurement principle, i.e. an applied differential pressure forces a small air...

2. Electrical Specifications 2.1 Power Supply The SDP2000-L differential pressure sensor requires a stable voltage supply of 5V. Influence of the supply voltage variation on the offset and the sensitivity are given in Table 4 2.2 Voltage Output The SDP2000-L features a voltage output from 0.25V to 4.0V (Figure 1). An output voltage below 0.25V indicates a negative differential pressure. This range is not calibrated however. The resistive load at the output pin should be larger than 20kOhm. The capacitive load at the output pin must not be larger than 200pF. If the design shows a larger capacity...

3. Physical Dimensions and Mounting Information 3.1 Housing The SDP2000-L differential pressure sensor is mounted in a PPS housing. The package has been designed to withstand continuous overpressures of at least 1 bar (14.5 PSI). Burst pressure is > 2 bar (29 PSI) The physical dimensions and mounting information is given in Figure 2 and Figure 3.

3.2 Soldering Instructions The SDP2000-L differential pressure sensor can be wave soldered. Direct reflow soldering is not recommended since it may affect the accuracy. If reflow soldering is required Sensirion recommends to use an SMD connector (e.g. type Samtec SSM103-L-SV) and to mount the SDP2000-L after soldering. 3.3 Connecting Hose Sensirion recommends a hose with an inner diameter of 1/8 to 3/20 inch (3.18 to 3.8mm). Due to the dynamic measurement principle, a small air flow is required (Figure 4) which leads to a dependence on the length of the hose (Figure 5). Tubes up to 1 m show less...

4. Shipping Package SDP2000-L is shipped in trays of 25pcs. 5. Ordering Information Use the part names and item numbers shown in the following table when ordering SDP2000-L differential pressure sensor. For the latest product information and local distributors, visit www.sensirion.com.

Important Notices Warning, personal injury Do not use this product as safety or emergency stop devices or in any other application where failure of the product could result in personal injury (including death). Do not use this product for applications other than its intended and authorized use. Before installing, handling, using or servicing this product, please consult the datasheet and application notes. Failure to comply with these instructions could result in death or serious injury. If the Buyer shall purchase or use SENSIRION products for any unintended or unauthorized application, Buyer...