SDP800-500PA

## **Datasheet SDP8xx-Digital** Digital Differential Pressure Sensor 

- Excellent repeatability, no drift, no offset 

- Extended feature set – smart averaging 

- Calibrated and temperature compensated 

## **Product Summary** 

The SDP800 sensor family is Sensirion’s series of digital differential pressure sensors designed for high-volume applications. The sensors 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, also at the bottom end of the measuring range. 

The SDP800 Series features a digital 2-wire I[2] C interface, which makes it easy to connect directly to a microprocessor. 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 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 

## **Content** 

|1.|Ordering Information .............................................................. 2|
|---|---|
|2.|Sensor Performance .............................................................. 2|
|3.|Specifications ......................................................................... 3|
|4.|Pin Assignment ...................................................................... 4|
|5.|Measurement Modes ............................................................. 5|
|6.|Digital Interface Description ................................................... 6|
|7.|Package Outline................................................................... 11|
|8.|Soldering .............................................................................. 13|
|9.|Shipping Package ................................................................ 13|
|Revision History ............................................................................ 13||
|Important Notices ......................................................................... 14||
|Headquarters and Subsidiaries .................................................... 14||



1/14 

Version 1.1 – April 2019 

www.sensirion.com 

## **1. Ordering Information** 

Use the part name and order number shown in the following table when ordering SDP800 series differential pressure sensor. 

|Part name|Form Factor|Range|I2C address|ShippingPackage|Order number|
|---|---|---|---|---|---|
|SDP800-500Pa|Manifold mount|500Pa - bidirectional|0x25|Trays of 80pieces|1-101551-01|
|SDP801-500Pa|Manifold mount|500Pa - bidirectional|0x26|Trays of 80pieces|3.000.142|
|SDP810-500Pa|Tube connection|500Pa - bidirectional|0x25|Trays of 80pieces|1-101532-01|
|SDP811-500Pa|Tube connection|500Pa - bidirectional|0x26|Trays of 80pieces|3.000.144|
|SDP800-125Pa|Manifold mount|125Pa - bidirectional|0x25|Trays of 80pieces|1-101599-01|
|SDP810-125Pa|Tube connection|125Pa - bidirectional|0x25|Trays of 80pieces|1-101597-01|



## **2. Sensor Performance** 

## **2.1 Differential Pressure Specification[1]** 

|Parameter|SDP8xx-500Pa|SDP8xx-125Pa|
|---|---|---|
|Measurement range|-500 to 500 Pa<br>(-2 to 2 inH2O)|-125 to 125 Pa<br>(-0.5 to 0.5 inH2O)|
|Zeropoint accuracy2,3|0.1 Pa|0.08 Pa|
|Span accuracy2,3|3% of reading|3% of reading|
|Zeropoint repeatability3|0.05 Pa|0.04 Pa|
|Span repeatability3|0.5% of reading|0.5% of reading|
|Span shift due to temperature<br>variation|< 0.5% of reading per 10°C|< 0.5% of reading per 10°C|
|Offset stability|< 0.05 Pa/year|< 0.05 Pa/year|
|Flow stepresponse time(τ63)|< 3ms||
|Resolution|16 bit||
|Calibrated for|Air,N2||
|Media compatibility|Air,N2,O2,non-condensing||
|Temperature compensation range|-20 °C to +85 °C||



## **2.2 Temperature Specification[4]** 

|Parameter|Value|
|---|---|
|Measurement range|-40°Cto +85°C|
|Resolution|16 bit|
|Accuracy|2 °C (-10 °C to +60 °C)<br>3 °C(-40 °C to +85 °C)|
|Repeatability|0.1°C|



> 1 Unless otherwise noted, all sensor specifications are valid at 25°C with VDD = 3.3 V and absolute pressure = 966 mbar. 

> 2 Includes repeatability 

> 3 Total accuracy/repeatability is a sum of zero-point and span accuracy/repeatability. 

> 4 The measured temperature is the temperature of the bulk silicon in the sensor. This temperature value is not only depending on the gas temperature, but also on the sensor’s surroundings. Using the signal to measure solely the gas temperature will need special precautions, such as isolating the sensor from external temperate influences. 

2/14 

Version 1.1 – April 2019 

www.sensirion.com 

## **3. Specifications** 

## **3.1 Electrical Specifications** 

|Parameter|Symbol|Condition|Min.|Typ.|Max.|Units|Comments|
|---|---|---|---|---|---|---|---|
|Supply Voltage|VDD||2.7||5.5|V||
|Power-up/down level|VPOR||2.3|2.5|2.7|V||
|Supply current|IDD|Measuring||3.8|5.5|mA||
|||Idle state|||1.1|mA||
|||Sleepmode|||1|uA||



**3.2 Timing Specifications** 

|Parameter<br>~~PO~~|Symbol<br>|Condition<br>|Min.<br>|Typ.<br>|Max.<br>|Units<br>|Comments<br>|
|---|---|---|---|---|---|---|---|
|Power-up time<br>~~POnn~~|tPU<br>~~nn~~|~~nn~~|~~nn~~|~~nn~~|25<br>~~nn~~|ms<br>~~nn~~|Time to sensor ready<br>~~nn~~|
|Soft reset time<br>~~nn~~<br>~~es~~|tSR<br>~~nn~~<br>~~GO~~|~~nn~~<br>~~GO~~|~~nn~~<br>~~GO~~|~~nn~~<br>~~GO~~|2<br>~~nn~~<br>~~GO~~|ms<br>~~nn~~<br>~~GO~~|Time between soft<br>reset command or exit<br>sleep mode and<br>sensor ready<br>~~nn~~<br>~~GO~~|
|I2C SCL frequency<br>~~es~~|fI2C<br>~~GO~~|~~GO~~|~~GO~~|400<br>~~GO~~|1000<br>~~GO~~|kHz<br>~~GO~~|~~GO~~|
|Update rate differential<br>pressure value<br>~~es~~<br>~~A~~|~~GO~~<br>~~A~~|Continuous mode<br>~~GO~~<br>~~A~~|1800<br>~~GO~~<br>~~A~~|2000<br>~~GO~~<br>~~A~~|2200<br>~~GO~~<br>~~A~~|Hz<br>~~GO~~<br>~~A~~|~~GO~~<br>~~A~~|
|Update rate<br>temperature value<br>~~A~~<br>~~Rs~~|~~A~~<br>~~DDO~~|Continuous mode<br>~~A~~<br>~~DDO~~|112.5<br>~~A~~<br>~~DDO~~|~~A~~<br>~~DDO~~|~~A~~<br>~~DDO~~|Hz<br>~~A~~<br>~~DDO~~|Temperature value is<br>updated at least every<br>16 pressure values<br>~~A~~<br>~~DDO~~|
|Measurement time<br>~~Rs~~|~~DDO~~|Triggered mode<br>~~DDO~~|40<br>~~DDO~~|45<br>~~DDO~~|50<br>~~DDO~~|ms<br>~~DDO~~|~~DDO~~|



## **3.3 Mechanical Specifications** 

|Parameter|Symbol|Condition|Min.|Typ.|Max.|Units|Comments|
|---|---|---|---|---|---|---|---|
|Allowable overpressure|Pmax||||1|bar||
|Rated burst pressure|Pburst||5|||bar||
|Weight|W||||6|g||
|**3.4**<br>**Materials**||||||||
|Parameter||||||||
|Wetted materials|PBT (polybutylene terephthalate), glass (silicon nitride, silicon oxide), silicon, gold, FR4, silicone as static|||||||
|||sealing, epoxy, copper alloy, lead-free solder||||||
|REACH,RoHS|||REACH and RoHS compliant|||||



## **3.4 Materials** 

## **3.5 Absolute Minimum and Maximum Ratings** 

|Parameter|Rating|Units|
|---|---|---|
|Supply Voltage VDD|-0.3 to 5.5|V|
|Max Voltage on pins (SDA, SCL)|-0.3 to VDD+0.3|V|
|Input current on any pin|±70|mA|
|Operating temperature range1|-40 to+85|°C|
|Storage temperaturerange|-40 to+85|°C|
|Max. humidity for long term exposure|40°C dew point||
|ESD HBM (human body model)|2|kV|



> 1 For Air and N2. Long term exposure to (high concentrations of) O2 at high temperatures can reduce the product lifetime 

3/14 

Version 1.1 – April 2019 

www.sensirion.com 

## **4. Pin Assignment** 

The pin assignments of the SDP8xx-Digital can be found in Table 1 

|Pin no.|Name|Description|**SDA       GND     VDD       SCL**<br>=< SSS<br>iM<br>Iq]<br>||| sewemson<br>q<br>r4<br>=<br>wy,<br>cySS<br>——<br>=<br>Ae a<br>=F|
|---|---|---|---|
|1|SCL|Serial Clock (I2C Interface)||
|2|VDD|VDD Supply||
|3|GND|Connect to ground||
|4|SDA|Bidirectional Serial Data (I2C Interface)||



**Table 1:** _SDP8xx-Digital pin assignment (bottom view)._ 

4/14 

Version 1.1 – April 2019 

www.sensirion.com 

## **5. Measurement Modes** 

The SDP8xx-Digital is a highly versatile differential pressure sensor and is very flexible regarding the measurement speed. This flexibility not only allows for optimizing the sensor’s performance to a specific application, but also for adapting the sensor to different use cases. For example, in one use case the sensor is detecting the smallest and fastest changes, whereas at another time the sensor can measure in larger intervals while consuming only little energy. 

## **5.1 Continuous Mode vs Triggered Mode** 

In continuous mode the sensor is measuring at the highest speed and writes the measurement values to the I[2] C results buffer, where the I[2] C master can read out the value when it requires. 

In triggered mode the sensor is default in an idle state and wakes up when the command is sent. It then powers up the heater and does a measurement. During this time the sensor doesn’t acknowledge any I[2] C read header, or stretches the clock when clock stretching is enabled. When the measurement is finished the sensor returns to the idle state and makes the measurement result available to be read out. 

For more details see chapter 6.3.3. 

||Continuous mode|Triggered mode|
|---|---|---|
|Description|Measures continuously|Measures once after command is sent|
|Measurement speed and<br>rate|Measurement result can be read out<br>continuously and at any time, but not faster<br>than 0.5ms.|Measurement result is available in +/- 45ms<br>after command.<br>Clock stretching is available.|
|Measurement method|Sensor configuration is optimized for speed<br>and accuracy.|Sensor configuration is optimized for low<br>power consumption.|
|Recommended use|Best used where speed and accuracy are<br>most important.|Best used where energy consumption is<br>more important than speed.|



## **5.2 Continuous Mode and ‘Average till Read’** 

In continuous measurement modes a new measurement result is available every 0.5ms. A new value can be read out every 0.5ms. 

If the ‘average till read’ option is chosen, the sensor averages all values ( _xi_ ) since last read out, or, when no read has occurred yet, since last start measurement command. This has the benefit that the user can read out the sensor at its own desired speed, without losing information and thus prevents aliasing. During the first 25 ms of averaging the averaged value is obtained as the arithmetic mean. 

**==> picture [130 x 37] intentionally omitted <==**

When the reading speed is even slower than 25 ms, the sensor will continue to average, but with another algorithm. In this algorithm exponential smoothing is used, with a smoothing factor 𝛼 = 0.05. 

𝑆𝑘 =  𝛼∙ 𝑥𝑖 + (1 − 𝛼) ∙ 𝑆𝑘−1, 𝑆0 = 𝑥,̅         for 𝑡> 25 ms 

Where S0 is the arithmetic value after the first 25 ms. 

Please refer to relevant literature for more information about exponential smoothing. 

## **5.3 Temperature Compensation Modes and Absolute Pressure Dependency** 

The SDP8xx is temperature compensated both for differential pressure and for mass flow compensated differential pressure. In use cases where the SDP8xx is used to measure mass flow it is advised to use mass flow temperature compensation. In this case no absolute pressure compensation is required. 

For more information about temperature and absolute pressure 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. 

5/14 

Version 1.1 – April 2019 

www.sensirion.com 

## **6. Digital Interface Description** 

The SDP8xx-digital interface is compatible with the I[2] C protocol. This chapter describes the command set for SDP8xx-digital. For detailed information about the I[2] C protocol, please check the document "NXP I[2] C-bus specification and user manual". 

## **6.1 I[2] C Addresses** 

The following table lists the SDP8xx-digital product variants and its I[2] C addresses. 

|Product Variant|I2C address|
|---|---|
|SDP800-500Pa / SDP810-500Pa|0x25 (b 0100101)|
|SDP800-125Pa / SDP810-125Pa|0x25 (b 0100101)|
|SDP801-500Pa / SDP811-500Pa|0x26 (b 0100110)|



The address is followed by a read or write bit. 

## **6.2 I[2] C Sequences** 

The commands are 16-bit. Data is read from the sensor in multiples of 16-bit words, each followed by an 8-bit checksum to ensure communication reliability. 

**==> picture [498 x 229] intentionally omitted <==**

**----- Start of picture text -----**<br>
Cn I [2] C master writes 16 bit command<br>S I2CAdr[6:0] W Cmd[15:8] Cmd[7:0]<br>I [2] C master sends read header and receives multiple 16bit words with CRC byte.<br>S I2CAdr[6:0] R Data1[15:8]  Data1[7:0]  CRC1[7:0]  P<br>Ce oo | | or<br>Data2[15:8] Data2[7:0] CRC2[7:0] P<br>|<br>or<br>≈<br>— DataX[15:8]  DataX[7:0]  | CRCX[7:0]  o P o<br>| 1 0<br>Ce Dark areas with white text indicate that the sensor controls the SDA (Data) line.<br>ACK  ACK  ACK<br>ACK  ACK  ACK ACK<br>ACK  ACK ACK<br>ACK  ACK ACK<br>**----- End of picture text -----**<br>


I[2] C sequences can be aborted with a NACK and STOP condition. 

## **6.3 I[2] C Commands** 

The command set of the SDP8xx-digital consists of a set of different commands: 

- Continuous measurement 

   - Start Continuous measurement commands 

   - Stop measurement command 

- Triggered measurement commands 

- Soft reset 

- Entering and exiting sleep mode 

- Read product identifier and serial number 

6/14 

Version 1.1 – April 2019 

www.sensirion.com 

**6.3.1 Start Continuous Measurement** The sensor measures both the differential pressure and temperature. Both measurement results can be read out through one single I[2] C read header. 

Continuous measurements can be started up in different configurations by a set of commands. 

|Command code (Hex)|Temperature compensation|Averaging|
|---|---|---|
|0x3603|Mass flow|Average till read|
|0x3608|Mass flow|None-Update rate 0.5ms|
|0x3615|Differential pressure|Average till read|
|0x361E|Differentialpressure|None-Updaterate 0.5ms|



After one of the commands has been sent, the chip continuously measures and updates the measurement results. New results can be read continuously with only an I[2] C read header. 

The measurement command must only be sent once, if acknowledged. The command must not be resent or other commands must not be sent until the stop measurement command has been issued. After the start measurement command is sent: 

- the first measurement result is available after 8ms. 

- small accuracy deviations (few % of reading) can occur during the next 12ms. 

When no measurement data is yet available the sensor will respond with a NACK to the I[2] C read header (I[2] C address + read bit). 

|Preceding<br>command|Consecutive read|Description|
|---|---|---|
|continuous<br>measurement|Byte1: DP 8msb<br>Byte2: DP 8lsb<br>Byte3: CRC<br>Byte4: Temp 8msb<br>Byte5: Temp 8lsb<br>Byte6: CRC<br>Byte7: Scale Factor differential pressure 8msb<br>Byte8: Scale Factor differential pressure 8lsb<br>Byte9: CRC|After<br>a<br>start<br>continuous<br>measurement<br>commands, the measurement results can be<br>read out.<br>The temperature and scale factor don’t need to<br>be read out (every time). The read sequence<br>can be aborted by a NACK and a STOP<br>condition.<br>The scale factor is for differential pressure in<br>Pascal.|



|Command|Command code (Hex)|Description|
|---|---|---|
|Stop continuous<br>measurement|0x3FF9|This<br>command<br>stops<br>the<br>continuous<br>measurement and puts the sensor in idle mode.<br>It powers off the heater and makes the sensor<br>receptive to another command after 500us.<br>The Stop command is also required when<br>switching<br>between<br>different<br>continuous<br>measurement commands.|



When the sensor is in continuous measurement mode, the sensor must be stopped before it can accept another command. The only exception is the soft reset command as described in section 6.3.4. 

In idle mode the sensor will consume less power, but consider the sleep mode for most effective energy saving. 

7/14 

Version 1.1 – April 2019 

www.sensirion.com 

## **6.3.3 Triggered Measurement** 

During a triggered measurement the sensor measures both differential pressure and temperature. The measurement starts directly after the command has been sent. The command needs to be repeated with every measurement. 

|Command code (Hex)|Temperature compensation|Clock stretching|
|---|---|---|
|0x3624|Mass flow||
|0x3726|Massflow|Yes|
|0x362F|Differential pressure||
|0x372D|Differential pressure|Yes|



During the 45ms that the sensor is measuring, no command can be sent to the sensor. After the 45ms the result can be read out and any command can be sent to the sensor. 

Monitoring whether or not the sensor is ready with its measurement can be done with the following methods. 

|Method|Available|Description|
|---|---|---|
|Clock stretching|Only for clock<br>stretching commands|The sensor starts the measurement after the triggered measurement<br>command with clock stretching. When an I2C read header is sent within<br>45ms the sensor performs clock stretching after acknowledging the<br>read header.<br>When the sensor has finished the measurement, it makes the result<br>available by releasing the SCL.|
|Polling|Only for non-clock<br>stretching commands|In this mode the sensor does not acknowledge (NACK) an I2C read<br>headeraslong asnomeasurementresultis available.|



When new measurement data is available it can be read out by sending an I[2] C read header and reading out the data from the sensor. In the table below the data layout of the results can be found. 

|Preceding<br>command|Consecutive read|Description|
|---|---|---|
|Triggered<br>measurement|Byte1: DP 8msb<br>Byte2: DP 8lsb<br>Byte3: CRC<br>Byte4: Temp 8msb<br>Byte5: Temp 8lsb<br>Byte6: CRC<br>Byte7: Scale Factor differential pressure 8msb<br>Byte8: Scale Factor differential pressure 8lsb<br>Byte9: CRC|After a triggered measurement command, the<br>results can be read out when the sensor is<br>finished with the measurement.<br>The temperature and scale factor don’t need to<br>be read out (every time). The read sequence<br>can be aborted by a NACK and a STOP<br>condition.<br>The scale factor is for differential pressure in<br>Pascal.|



## **6.3.4 Soft Reset** 

|Command|I2C address + W bit +<br>command code (Hex)|Consecutive<br>read|Description|
|---|---|---|---|
|General call<br>reset|0x0006|NA|This sequence resets the sensor.<br>Note that the I2C address is 0x00, which is the general call<br>address, and that the command is 8 bit.The reset is<br>implemented according to the I2C specification.|



After the reset command the sensor will take maximum 2ms to reset. During this time the sensor will not acknowledge its address nor accept commands. 

8/14 

Version 1.1 – April 2019 

www.sensirion.com 

**6.3.5 Entering and Exiting Sleep Mode** In sleep mode the sensor uses the minimum amount of current. The mode can only be entered from idle mode, i.e. when the sensor is not measuring. 

This mode is particularly useful for battery operated devices. To minimize the current in this mode, the complexity of the sleep mode circuit has been reduced as much as possible, which is mainly reflected by the way the sensor exits the sleep mode. 

In sleep mode the sensor cannot be soft reset. 

|Command|Command code<br>(Hex)|Consecutive<br>read|Description|
|---|---|---|---|
|Enter Sleep mode|0x3677|NA|**Triggered mode:**the sleep command can be sent after the<br>result have been read out and the sensor is in idle mode.<br>**Continuous mode:**the sleep command can be sent after a<br>stop continuous measurement command has been issued<br>and the sensor isin idlemode.|
|Exit Sleep mode|NA|NA|The sensor exits the sleep mode and enters the idle mode<br>when it receives the**valid I2C address and a write bit (‘0’).**<br>Note that the I2C address is**not**acknowledged. The sensor<br>should wake up within 2ms. Polling with a write header (I2C<br>address and a write bit) can be used to check whether the<br>sensor has woken up.|



## **6.3.6 Read Product Identifier** 

During assembly and start-up of the system, it might be required to check some basic parameters in the sensor - for example to check if the correct sensor is integrated. 

The product identifier and serial number can be read out after sending a sequence of two commands, both preceded by a start condition. 

|Command|Command code|Consecutive read|Description|
|---|---|---|---|
|Read product<br>identifier|0x367C<br>0xE102|Byte1: Product number [31:24]<br>Byte2: Product number [23:16]<br>Byte3: CRC<br>Byte4: Product number [15:8]<br>Byte5: Product number [7:0]<br>Byte6: CRC<br>Byte7: Serial number [63:56]<br>Byte8: Serial number [55:48]<br>Byte9: CRC<br>Byte10: Serial number [47:40]<br>Byte11: Serial number [39:32]<br>Byte12: CRC<br>Byte13: Serial number [31:24]<br>Byte14: Serial number [23:16]<br>Byte15: CRC<br>Byte16: Serial number [15:8]<br>Byte17: Serial number [7:0]<br>Byte18: CRC|Note that both commands need to be preceded<br>with an I2C write header (I2C address + W).<br>The second command returns:<br>-<br>32 bit unique product and revision<br>number. The number is listed in the<br>table below.<br>_Note that the last 8 bits are the revision_<br>_number and can be subject to change._<br>-<br>64 bit unique serial number|



|Product|Product number|
|---|---|
|SDP800-500Pa|0x03020101|
|SDP810-500Pa|0x03020A01|
|SDP801-500Pa|0x03020401|
|SDP811-500Pa|0x03020D01|
|SDP800-125Pa|0x03020201|
|SDP810-125Pa|0x03020B01|



9/14 

Version 1.1 – April 2019 

www.sensirion.com 

## **6.4 Checksum Calculation** 

The checksum byte is generated by a CRC algorithm with the following properties: 

|Property|Value|
|---|---|
|Name|CRC-8|
|Protected data|read data|
|Width|8 bit|
|Polynomial|0x31(x8+ x5+ x4 +1)|
|Initialization|0xFF|
|Reflect input|False|
|Reflect output|False|
|Final XOR|0x00|
|Example|CRC(0xBEEF)=0x92|



## **6.5 Conversion to Physical Values** 

Conversion of the differential pressure and temperature sensor signals to a physical value is done with the scale factor. 

## **6.5.1 Scale Factors** 

|Parameter|SDP8xx-**500Pa**|SDP8xx-**125Pa**|
|---|---|---|
|Differential Pressure(Pascal)|60 Pa-1|240 Pa-1|
|Differential Pressure(inches H2O)|14’945(inH2O)-1|59’780(inH2O)-1|
|Temperature(°C)|200 °C-1|200 °C-1|



## **6.5.2 Differential Pressure** 

The digital calibrated differential pressure 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. 

differential pressure = sensor output  scale factor 

## **6.5.3 Temperature** 

The digital calibrated temperature 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. 

temperature in °C = sensor output  scale factor 

10/14 

Version 1.1 – April 2019 

www.sensirion.com 

## **7. Package Outline** 

**==> picture [233 x 10] intentionally omitted <==**

**----- Start of picture text -----**<br>
7.1 Dimensions SDP80x – Manifold Connection<br>**----- End of picture text -----**<br>


**Figure 1** _**:** SDP80x. All dimensions in mm._ 

## **7.2 Dimensions SDP81x – Tube Connection** 

**Figure 2:** _SDP81x. All dimensions in mm._ 

11/14 

Version 1.1 – April 2019 

www.sensirion.com 

**==> picture [76 x 12] intentionally omitted <==**

**----- Start of picture text -----**<br>
7.3 Footprint<br>**----- End of picture text -----**<br>


**==> picture [227 x 191] intentionally omitted <==**

**----- Start of picture text -----**<br>
A<br>B<br>SCL    VDD       GND   SDA<br>**----- End of picture text -----**<br>


**Figure 3** _**:** Footprint for PCB mounting (top view = sensor side). All dimensions in mm._ 

A: Overall sensor dimensions 

- B: Holes for additional mounting screws (optional) 

In case the sensor is not mounted on a PCB and is connected with a cable, the SDP800 series cap is recommended. 

12/14 

Version 1.1 – April 2019 

www.sensirion.com 

## **8. Soldering** 

Standard wave soldering systems may be used for soldering SDP800 series sensors. Reflow soldering is **not** feasible and may damage the sensor. 

The sensor ports must be protected from solder splash and flux during soldering. _Figure 4_ shows an appropriate temperature profile with maximum temperature values. 

**==> picture [298 x 208] intentionally omitted <==**

**----- Start of picture text -----**<br>
Entrance to solder Wave  Exit from solder Wave<br>(Time in wave < 2 s)<br>Flux zone  Preheat zone<br>Solder Wave Peak<br>250°C<br>Temp. Max. 260°C<br>200°C<br>Approx. PCB bottom-<br>150°C side temp.  Max 145°C<br>100°C<br>50°C PCB top-side<br>temperature<br>0°C<br>Start  Approx.<br>1 min<br>**----- End of picture text -----**<br>


**Figure 4:** _Suitable wave soldering profile._ 

The characteristics of wave soldering machines vary, so any soldering setup must be tested before production use. 

## **9. Shipping Package** 

SDP8xx are shipped in trays of 80pcs. The tray dimension is 355mm x 255mm x 21.5mm. By piling them up, the height per tray can be considered as 19mm. 

## **Revision History** 

|Date|Author|Version|Version<br>Changes|
|---|---|---|---|
|21.03.2018 ANB|21.03.2018 ANB|V1|Released|
|02.04.2019 ANB|02.04.2019 ANB|V1.1|Added SDP801-500Pa and SDP811-500Pa product variants, which have I2C address 0x26.<br>Minor clarifications in chapter 5.2, 6.1, 6.3.1 and 6.3.6. Made ‘Orderinginformation’ 1stchapter.|
|||||



13/14 

Version 1.1 – April 2019 

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 shall defend, indemnify and hold harmless SENSIRION and its officers, employees, subsidiaries, affiliates and distributors against all claims, costs, damages and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if SENSIRION shall be allegedly negligent with respect to the design or the manufacture of the product. 

## **ESD Precautions** 

The inherent design of this component causes it to be sensitive to electrostatic discharge (ESD). To prevent ESD-induced damage and/or degradation, take customary and statutory ESD precautions when handling this product. 

See application note “Handling Instructions” for more information. 

## **Warranty** 

SENSIRION warrants solely to the original purchaser of this product for a period of 12 months (one year) from the date of delivery that this product shall be of the quality, material and workmanship defined in SENSIRION’s published specifications of the product. Within such period, if proven to be defective, SENSIRION shall repair and/or replace this product, in SENSIRION’s discretion, free of charge to the Buyer, provided that: 

- notice in writing describing the defects shall be given to SENSIRION within fourteen (14) days after their appearance; 

- such defects shall be found, to SENSIRION’s reasonable satisfaction, to have arisen from SENSIRION’s faulty design, material, or workmanship; 

- the defective product shall be returned to SENSIRION’s factory at the Buyer’s expense; and 

- the warranty period for any repaired or replaced product shall be limited to the unexpired portion of the original period. 

This warranty does not apply to any equipment which has not been installed and used within the specifications recommended by SENSIRION for the intended and proper use of the equipment. EXCEPT FOR THE WARRANTIES EXPRESSLY SET FORTH HEREIN, SENSIRION MAKES NO WARRANTIES, EITHER EXPRESS OR IMPLIED, WITH RESPECT TO THE PRODUCT. ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION, WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE EXPRESSLY EXCLUDED AND DECLINED. 

SENSIRION is only liable for defects of this product arising under the conditions of operation provided for in the datasheet and proper use of the goods. SENSIRION explicitly disclaims all warranties, express or implied, for any period during which the goods are operated or stored not in accordance with the technical specifications. 

SENSIRION does not assume any liability arising out of any application or use of any product or circuit and specifically disclaims any and all liability, including without limitation consequential or incidental damages. All operating parameters, including without limitation recommended parameters, must be validated for each customer’s applications by customer’s technical experts. Recommended parameters can and do vary in different applications. 

SENSIRION reserves the right, without further notice, (i) to change the product specifications and/or the information in this document and (ii) to improve reliability, functions and design of this product. 

Copyright © 2016-2019, SENSIRION. CMOSens[®] is a trademark of Sensirion All rights reserved 

## Headquarters and Subsidiaries 

**Sensirion AG** Laubisruetistr. 50 CH-8712 Staefa ZH Switzerland 

**Sensirion Inc., USA** phone: +1 312 690 5858 info-us@sensirion.com www.sensirion.com 

**Sensirion Korea Co. Ltd.** phone: +82 31 337 7700~3 info-kr@sensirion.com www.sensirion.co.kr 

phone: +41 44 306 40 00 fax: +41 44 306 40 30 info@sensirion.com www.sensirion.com 

**Sensirion Japan Co. Ltd.** phone: +81 3 3444 4940 info-jp@sensirion.com www.sensirion.co.jp 

**Sensirion China Co. Ltd.** 

phone: +86 755 8252 1501 info-cn@sensirion.com www.sensirion.com.cn 

## **Sensirion Taiwan Co. Ltd** 

phone: +886 3 5506701 info@sensirion.com www.sensirion.com 

To find your local representative, please visit www.sensirion.com/distributors 

14/14 

Version 1.1 – April 2019 

www.sensirion.com