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SDP3x-Analog Differential Pressure Sensor with Analog Output

SDP3x-Analog Differential Pressure Sensor with Analog Output
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SDP3x-Analog Differential Pressure Sensor with Analog Output - 1

Datasheet SDP3x-Analog Differential Pressure Sensor with Analog Output ■ Smallest size enables portable applications ■ Reflow solderable - Pick & Place ■ Configurable analog output ■ Calibrated and temperature compensated ■ Excellent repeatability, no drift Product Summary The SDP3x sensor family is Sensirion's series of small differential pressure sensors designed for high-volume applications where size is a key requirement. It builds on the next generation CMOSens® sensor chip that is at the heart of Sensirion's new differential pressure and flow sensing platform. The analog SDP3x sensors offer a calibrated and temperature compensated analog voltage output. The output signal is configurable: different measurement speeds, output curves and temperature compensations can be selected - even dynamically during operation mode. 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

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SDP3x-Analog Differential Pressure Sensor with Analog Output - 2

1. Sensor Performance1.1 Differential Pressure Specification1 Parameter Unless otherwise noted, all sensor specifications are valid at 25°C with VDD = 3.3 V and absolute pressure = 966 mbar. For other pressure ranges contact Sensirion Output voltage integral non linearity and output voltage noise are not included and defined later in chapter 2.1. Note that the effect of output voltage integral non linearity and output voltage noise on accuracy is highly dependent on the output configuration (linear or square root). Includes repeatability Total accuracy/repeatability is a sum of zero-point...

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SDP3x-Analog Differential Pressure Sensor with Analog Output - 3

2. Specifications 2.1 Electrical Specifications For a resistive load to GND less than 100kOhm a 1nF capacitor to GND on the AOUT is recommended Allowable overpressure during operation. Refer to the SDP selection guide for pressure dependency of the measured signal. Fast absolute pressure changes on both ports can result in dynamic effects on the sensor signal. For higher overpressures or continuous high overpressures contact Sensirion. For Air and N2. Long term exposure to high temperatures and (high concentrations of) O2 can reduce the product lifetime For long term storage in Tape and...

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SDP3x-Analog Differential Pressure Sensor with Analog Output - 4

3. Pin Assignment The SDP3x consists of a QFN package with a plastic cap covering the top and providing the pneumatic connections to the sensor. Table 1 shows the pin assignments of the SDP3x-Analog sensor. Table 1: SDP3x-Analog pin assignment (bottom view). 3.1 Power Pins (VDD, GND) The power supply pins must be decoupled with a 100 nF capacitor that shall be placed as close to the sensor as possible. 3.2 OCS: Output Curve Selection Input Conversion to physical values AOut[V|, VDD[V|, Differential Pressure (DP) [Pa] Analog output is configured as a linear output. The sensor is not fully...

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SDP3x-Analog Differential Pressure Sensor with Analog Output - 5

3.3 TCS: Temperature Compensation Selection Input Configuration -or more information about temperature compensation for differential pressure sensors, for example volume flow measurements in bypass, refer to the selection guide in the differential pressure download center on our website. 3.4 BWS: Bandwidth Selection Input Configuration 3.5 AOut Pin The AOut pin gives out an analog ratiometric voltage, representing the measured differential pressure value. Please note the resistive and capacitive loads as mentioned in section 2.1. Formulas for converting AOut [V] to differential pressure...

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SDP3x-Analog Differential Pressure Sensor with Analog Output - 7

Recommended land pattern The solder mask is understood to be the insulating layer on top of the PCB covering the copper traces. It is recommended to design the land pattern as a Non- Solder Mask Defined (NSMD) type. Recommended stencil aperture The sensor must enter the reflow process only once and with a minimal temperature and exposure time. When both sides of the PCB are reflow soldered or multiple reflow runs are required, the sensor must be soldered in the last soldering run. In any case the temperature should not exceed 260°C; temperatures above 200°C should be limited in time to a...

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SDP3x-Analog Differential Pressure Sensor with Analog Output - 8

6. Shipping Package SDP3x are provided in tape & reel shipment packaging. Standard packaging size is 1500 or 250 units per reel. The drawing of the packaging tapes with sensor orientation is shown in Figure 2. 10 SPROCKET HOLE PITCH CUMULATIVE TOLERANCE ± 0.2 POCKET POSITION RELATIVE TO SPROCKET HOLE MEASURED AS TRUE POSITION OF POCKET, NOT POCKET HOLE

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SDP3x-Analog Differential Pressure Sensor with Analog Output - 9

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,...

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