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

Content
1. Sensor Performance............................................................... 2
2. Electrical Specifications .......................................................... 4
3. Physical Dimensions and Mounting Information ..................... 5
4. Shipping Package .................................................................. 7
5. Ordering Information............................................................... 7
Revision History .............................................................................. 7
Important Notices ............................................................................ 8
Headquarters and Subsidiaries ....................................................... 8

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Datasheet SDP2000-L

1. Sensor Performance
Table 1: Sensor specifications (at 23°C and Pabsolute = 966 mbar, VDD = 5.0 V unless otherwise noted)
SDP2000-L Unit
Parameter
Min Typ Max
-100 3500 Pa
Measurement range
-0.4 14 Inch water
Calibrated range 0 3500 Pa

Power supply 4.75 5.00 5.25 V

Full scale output
4.00 V
(100 k load)
Zero Pressure Output 0.250 V
0.1 0.2 % FS (1)
Accuracy
1 1.5 % m.v. (2)
Repeatability 0.3 0.5 % m.v. (2)
Offset stability 0 0.3 Pa / year
Additional error over temperature 0 0 % FS/°C
(T ≠ 23°C) 0.03 0.05 % m.v./°C
Resolution < 30% FS(1) 0.2 0.5 1 Pa
Resolution 30..70% FS(1) 1 2.5 8 Pa
Resolution > 70% FS(1) 8 11 14 Pa
(1) FS = full scale or span. For the SDP2000-L it is 3500 Pa
(2) m.v. = measured value, i.e. reading

Table 2: Additional sensor specifications

Media Air, N2 – for other gases contact Sensirion.
Operating Conditions:
- Temperature -10 °C … +60 °C / 14°F … 140 °F
- Humidity non-condensing
Ambient storage conditions(1) -40 °C … +80 °C / -40°F … 176 °F
Orientation sensitivity below resolution
Response time 40 ms
Admissible overpressure (short term) 1 bar (14.5 PSI)
Burst Pressure Capability 2 bar (29 PSI)
Weight 14 g
Protection Class IP 20
Glass (silicon nitride, silicon oxide), Silicon, PPS (Polyphenylene Sulfide),
Wetted materials
PEEK (Polyetheretherketone), FR4, Silicone as static sealing, Epoxy, Gold
Gas flow through sensor see Figure 4
REACH and RoHS REACH and RoHS compliant
(1) For maximum 2 weeks

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Datasheet SDP2000-L

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 flow through the sensor. This results in a dependence of
the indicated differential pressure on the ambient air density. While the temperature effect is compensated (see
Paragraph 1.1) the altitude above sea level has an influence on the SDP2000-L output. If desired, this effect can be
compensated by a correction factor according to the following equation:
Dpeff = Dpsensor * Pcal / Pamb
where Dpeff is the effective differential pressure, Dpsensor the differential pressure indicated by the SDP2000-L, Pcal the
absolute pressure during calibration (966 mbar) and Pamb the actual ambient absolute pressure.

Note:
For more detailed information about temperature and pressure compensation, refer to the selection guide in the
differential pressure download center on the Sensirion website.

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Datasheet SDP2000-L

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 at the output pin an additional resistor is required in series at the
output (e.g. 620Ohm).

4.00

3.00 Formula: P = lfactor * (voltage(1) – 0.250)/3.750

output voltage [V]

2.00 lfactor =
Pascal 3500
Inch water 14
1.00 (1) voltage: measured output voltage in Volt.

0.00
0 20 40 60 80 100
differential pressure [% full scale]

Figure 1: Linear output at 5V supply of the SDP2000-L.

The fine lines indicate the maximum tolerances including a temperature variation from 0 to 50°C.

Table 3: Electrical characteristics

Parameter Conditions Min. Typ. Max. Units
Power Supply Voltage VDD 4.75 5.0 5.25 VDC
Operating Current 5 V, no load, zero flow 4.3 5.2 mA
Output capacitive load Cload 20 200 pF
Recommended load Rload To GND 20 100  k

Table 4: Typical power supply dependence of the offset and the sensitivity
Parameter 4.75 V 5.0 V 5.25 V Units
Offset - 10.3 + 10.3 Pa
Sensitivity 1.01 1.07 1.13 mV/Pa

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Datasheet SDP2000-L

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.

Pin# Function
1 VDD (5V)
2 Ground
3 OUT (0.25…4V)

Figure 2: Pin out and physical dimensions in mm (inch). The drawing is not to scale

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Datasheet SDP2000-L

Dim. [mm] [inch] [mil]

A 3.00 0.118 118
B 3.30 0.130 130
C 1.20 0.047 47
D 10.20 0.402 402
E 28.20 1.110 1110
F 2.54 0.100 100
G 0.60 0.024 24
H 0.50 0.020 20
I 22.70 0.894 894

Figure 3: SDP2000-L PCB footprint. The drawing is not to scale

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 than 1 % error of the measured value.

120
Length of the Deviation of
100 connecting hose Measured Value
gas flow [sccm]

80 0.5 m (20 inch) - 0.4 %

60
1.0 m (40 inch) - 0.8 %
40
2.0 m (80 inch) - 1.6 %
20
0 4.0 m (160 inch) - 3.2 %
0 50 100
differential pressure [% full scale]

Figure 4: Typical air flow through the SDP2000-L. Figure 5: Influence of the length of the connecting hose on
Please note: 1 sccm = 1 cm3/min at 0°C and 1013 mbar the accuracy (using 3/16 inch inner diameter). Example: a 50
pressure (1 sccm = 0.001 norm liter) Pa difference pressure is shown as 49.8 Pa when using 0.5 m
tube with 3/16 inch diameter

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Datasheet SDP2000-L

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.
Part name Description / Output Product number
SDP2000-L 3500Pa, Analog linear voltage output 1-100113-03

Revision History
Date Author Version Changes
April 2017 ANB 1 Separate datasheet for SDP2000-L.
Specifications are unchanged.

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Datasheet SDP2000-L

Important Notices
Warning, personal injury  such defects shall be found, to SENSIRION’s reasonable
satisfaction, to have arisen from SENSIRION’s faulty design,
Do not use this product as safety or emergency stop devices or material, or workmanship;
in any other application where failure of the product could  the defective product shall be returned to SENSIRION’s factory
result in personal injury (including death). Do not use this at the Buyer’s expense; and
product for applications other than its intended and authorized
use. Before installing, handling, using or servicing this product,
 the warranty period for any repaired or replaced product shall
be limited to the unexpired portion of the original period.
please consult the datasheet and application notes. Failure to
comply with these instructions could result in death or serious This warranty does not apply to any equipment which has not been
injury. installed and used within the specifications recommended by
SENSIRION for the intended and proper use of the equipment.
If the Buyer shall purchase or use SENSIRION products for any
EXCEPT FOR THE WARRANTIES EXPRESSLY SET FORTH
unintended or unauthorized application, Buyer shall defend,
HEREIN, SENSIRION MAKES NO WARRANTIES, EITHER
indemnify and hold harmless SENSIRION and its officers,
EXPRESS OR IMPLIED, WITH RESPECT TO THE PRODUCT.
employees, subsidiaries, affiliates and distributors against all claims,
ANY AND ALL WARRANTIES, INCLUDING WITHOUT
costs, damages and expenses, and reasonable attorney fees arising
LIMITATION, WARRANTIES OF MERCHANTABILITY OR
out of, directly or indirectly, any claim of personal injury or death
FITNESS FOR A PARTICULAR PURPOSE, ARE EXPRESSLY
associated with such unintended or unauthorized use, even if
EXCLUDED AND DECLINED.
SENSIRION shall be allegedly negligent with respect to the design
or the manufacture of the product. SENSIRION is only liable for defects of this product arising under
the conditions of operation provided for in the datasheet and proper
ESD Precautions
use of the goods. SENSIRION explicitly disclaims all warranties,
The inherent design of this component causes it to be sensitive to express or implied, for any period during which the goods are
electrostatic discharge (ESD). To prevent ESD-induced damage operated or stored not in accordance with the technical
and/or degradation, take customary and statutory ESD precautions specifications.
when handling this product.
SENSIRION does not assume any liability arising out of any
See application note “Handling Instructions” for more information. application or use of any product or circuit and specifically disclaims
any and all liability, including without limitation consequential or
Warranty incidental damages. All operating parameters, including without
SENSIRION warrants solely to the original purchaser of this product limitation recommended parameters, must be validated for each
for a period of 12 months (one year) from the date of delivery that customer’s applications by customer’s technical experts.
this product shall be of the quality, material and workmanship Recommended parameters can and do vary in different applications.
defined in SENSIRION’s published specifications of the product. SENSIRION reserves the right, without further notice, (i) to change
Within such period, if proven to be defective, SENSIRION shall the product specifications and/or the information in this document
repair and/or replace this product, in SENSIRION’s discretion, free and (ii) to improve reliability, functions and design of this product.
of charge to the Buyer, provided that:
 notice in writing describing the defects shall be given to Copyright © 2017, SENSIRION.
SENSIRION within fourteen (14) days after their appearance; CMOSens® is a trademark of Sensirion
All rights reserved

Headquarters and Subsidiaries

SENSIRION AG Sensirion Inc., USA Sensirion Korea Co. Ltd.
Laubisruetistr. 50 phone: +1 312 690 5858 phone: +82 31 337 7700~3
CH-8712 Staefa ZH info-us@sensirion.com info-kr@sensirion.com
Switzerland www.sensirion.com www.sensirion.co.kr

phone: +41 44 306 40 00 Sensirion Japan Co. Ltd. Sensirion China Co. Ltd.
fax: +41 44 306 40 30 phone: +81 3 3444 4940 phone: +86 755 8252 1501
info@sensirion.com info-jp@sensirion.com info-cn@sensirion.com
www.sensirion.com www.sensirion.co.jp www.sensirion.com.cn

Sensirion Taiwan Co. Ltd. To find your local representative,

phone: +41 44 306 40 00 please visit
info@sensirion.com www.sensirion.com/contact

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