Datasheet Differential Pressure Sensors SDP600/610
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SGNSIRION SDP600 Sries (SDP6xx/5xx) Low-cost Digital Differential Pressure Sensor ■ Accuracy better than 0.2% FS near zero ■ Digital output (I2C) ■ Excellent repeatability, even below 10 Pa ■ Calibrated and temperature compensated ■ Excellent long-term stability ■ Flow measurement in bypass configuration Product Summary The SDP600 sensor family is Sensirion's sries of digital differential pressure sensors designed for high-volume applications. They measure the pressure of air and non-aggressive gases with superb accuracy and no offset drift. The sensors cover a pressure range of up to ±500 Pa (±2 inch H2O / ±5 mbar) and deliver outstanding accuracy even at the bottom end of the measuring range. The SDP600 series operates from a 3.3 Vdc supply voltage and features a digital 2-wire interface, which makes it easy to connect directly to a microprocessor. The signal is internally linearized and temperature compensated. The outstanding performance of these sensors is based on Sensirion's patented CMOSens® sensor technology, which combines the sensor element, signal processing and digital calibration on a tiny microchip. The differential pressure is measured by a thermal sensor element using flow-through technology. Compared with membrane-based sensors, the SDP600 features an extended dynamic range, better long-term stability, and improved repeatability, especially near zero. 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. Applications Connection diagram ■ Medical ■ HVAC ■ Automotive ■ Process automation ■ Burner control New versions ■ Low pressure versions SDP600/610-125Pa and SDP600/610-25Pa are suited to measure very low and ultra low differential pressure. ■ Low power versions (SDP606/SDP616) are developed especially for low power battery operation. ■ Special calibration to measure a massflow in bypass configuration (SDP601/SDP611). Vdd C (master) VDD 3.3V- SDP600 Series (slave) GND SDP600 series with bidirectional digital communication (I2C bus) Sensor chip The SDP600 series features a fourth-generation silicon sensor chip called SF04. In addition to a thermal mass flow sensor element, the chip contains an amplifier, A/D converter, EEPROM memory, digital signal processing circuitry, and interface. The highly sensitive chip requires only a minuscule amount of gas flow through the sensor. OEM options A variety of custom options can be implemented for high-volume OEM applications. Ask us for more information. www.sensirion.com Version 1.5 -January 2011 1/10

SGNSIRION THE SENSOR COMPANY 1. Sensor Performance 1.1 Physical spcifications1 Parameter SDP500 SDP600-500Pa SDP600-125Pa SDP600-25Pa SDP601 SDP606 SDP510 SDP610-500Pa SDP610-125Pa SDP610-25Pa SDP611 SDP616 Short Description Low cost Standard Low DP Lowest DP "mass flow" Low Power2 Calibrated range3 0 Pa to +500 Pa (0 to 2.0 in. H2O) - 500 Pa to + 500 Pa (± 2.0 in. H2O) - 125 Pa to + 125 Pa (± 0.5 in. H2O) - 25 Pa to + 25 Pa (± 0.1 in. H2O) - 500 to + 500 Pa (± 2.0 in. H2O) Measurement range - 500 to + 500 Pa (± 2.0 in. H2O) - 125Pa to + 125 Pa (± 0.5 in. H2O) - 25 Pa to + 25 Pa (± 0.1 in....

SGNSIRION THE SENSOR COMPANY 1.2 Ambient conditions 8'273'719 psi-1 298'900 (inch H2O)-1 Parameter SDP5xx / SDP6xx Series Calibrated for8 Air, N2 Media compatibility Air, N2, O2 Calibrated temperature range8 0 °C to +50 °C Operating temperature -20 °C to +80 °C Storage temperature8 -40 °C to +80 °C Position sensitivity Less than repeatability error 2.2 Electrical characteristics for SDP606 / SDP616 (low power version) Parameter SDP606 / SDP616 Operating voltage 2.7- 3.3 Vdc (A stable supply voltage of 3.0 V is recommended) Current drain < 400 nAs Sleep mode < 1 (iA Interface Digital 2-wire...

SENSIRION THE SENSOR COMPANY 3. Interface Spcifications The serial interface of the SDP600 sries is optimized in terms of sensor readout and power consumption. It is compatible with I2C interfaces. For detailed specifications of the I2C protocol, see The I2C Bus Sp驩cification, Version 2.1, January 2000 (source: NXP). Transmission STOP Condition (P): The STOP condition is a unique situation on the bus created by the master, indicating to the slaves the end of a transmission sequence (the bus is considered free after a STOP). I2C Transmission Stop Condition 3.1 Interface connection components...

SGNSIRION THE SENSOR COMPANY 3.4 Data transfer format Data is transferred in byte packets in the I2C protocol, which means in 8-bit frames. Each byte is followed by an acknowledge bit. Data is transferred with the most significant bit (MSB) first. A data transfer sequence is initiated by the master generating the Start condition (S) and sending a header byte. The I2C header consists of the 7-bit I2C device address and the data direction bit (R/_W). The value of the R/_W bit in the header determines the data direction for the rest of the data transfer sequence. If R/_W = 0 (WRITE) the...

5. Conversion to Physical Values 1500 842 1.15 2250 766 1.26 3000 697 1.38 5.1 Signal scaling and physical unit The calibrated signal read from the sensor is a signed INTEGER number (two's complement number). The INTEGER value can be converted to the physical value by dividing it by the scale factor (pressure = sensor output h-scale factor). The scale factor is specified in Section 2.1. 5.2 Temperature compensation The SDP600 sensor series features digital temperature compensation. The temperature is measured on the CMOSens® chip by an on-chip temperature sensor. This data is fed to a...

SENSIRION THE SENSOR COMPANY 7. Mechanical Spcifications 7.1 Mechanical concept The SDP600 Sries is designed for through-hole technology and can be wave-soldered or hand-soldered to a PCB. 驕 The SDP60x/SDP500 can be directly connected to a manifold using two O-rings. The SDP61x/SDP510 sensors have ports for connecting standard-size plastic tubes. 7.4 SDP610/SDP510 - Tube connection 7.2 Mechanical characteristics Parameter SDP510/SDP610 SDP500/SDP600 PCB attachment Clip-in and hand or wave soldering. Additional mechanical attachment depending on force requirements Allowable overpressure 1...