SDP1000-R Datasheet SDP1000-R | P1-P3

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SDP1000 / SDP2000

Low Range Differential Pressure Sensor

for Air and Non-Aggressive Gases

Data Sheet

–

− For cost sensitive HVAC and medical OEM applications

− Unsurpassed performance thanks to CMOSens

technology

− Offset and hysteresis free

− Excellent accuracy and reproducibility even below 10 Pa

− Fully calibrated and temperature compensated

− Linear or square root extracted output characteristics available

− Not sensitive to the mounting orientation

− Direct PCB mounting with simple snap-on system

SDP1000 / SDP2000 Product Summary

The SDP1000 / SDP2000 differential pressure sensors

for air cover the following measurement ranges: –5 to

125 Pa (0.5 inch H

O), -20 to 500 Pa (2 inch H

O), and -

100 to 3500 Pa (14 inch H

O).

Mounted in a rugged, chemically inert PPS housing the

SDP1000 / SDP2000 differential pressure sensors

feature 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 devices are supplied with 5.0 V and provide a

0.25…4.0 V output. Although the output of the

SDP1000 / SDP2000 differential pressure sensor is

analog, the internal linearization and temperature

compensation is performed digitally. This results in a

superior accuracy, outstanding resolution (up to 0.05

Pa), and lowest temperature dependence. The SDP1000

is available with a linear or square root extracted output

characteristics at the same price. Since fully

exchangeable just a few external electronic components

around the SDP1000 / SDP2000 make a high quality

differential sensor transmitter with e.g. an 0...10

V output

or other interfaces (see Figure 8).

Its leading performance is based on Sensirion’s

proprietary CMOSens

sensor technology which

combines the sensor element with amplification and A/D

conversion on one single silicon chip. The differential

pressure is measured by a thermal sensor element. In

contrast to other thermal differential pressure sensors

only a very small amount of air is required (see

Figure

6). This leads to a reliable operation even under

harsh conditions. In comparison to membrane based

sensors the SDP1000 / SDP2000 differential pressure

sensors show an extended measurement range, better

offset stability and improved reproducibility even at

lowest pressure ranges (see Figure 1 and 2). In addition

the SDP1000 / SDP2000 is robust against pressure

bursts and shows no sensitivity to the mounting

orientation.

SDP1000 / SDP2000 is fully RoHS compliant.

Applications

- Medical

- HVAC

- Automotive

- Process Automation

Block Diagram

Differential

pressure

Sensor

CMOSens

SENSOR CHIP

DIGITAL

Linearization and

Temperature

compensation

A/D converter

Memory

D/A

converter

5.0 V

OUT

0.25 V

to 4 V

GND

actual size

www.sensirion.com v5 February 2013 2/10

1 Specifications

Table 1: Sensor specifications (at 23°C and p

absolute

= 966 mbar, VDD = 5.0 V unless otherwise noted).

Parameter

SDP1000-L025 SDP1000-L05 SDP1000-L SDP1000-R SDP2000-L Unit

Min Typ Max Min Typ Max Min Typ Max Min Typ Max Min Typ Max

Measurement range

-62 62 -5 125 - 20 500 - 20 500 -100 3500

-0.25

0.25 -0.02

0.5 -0.08

2 -0.08

2 -0.4 14 Inch water

Power supply

(see Tab 4)

4.75 5.00 5.25 4.75 5.00 5.25 4.75 5.00 5.25 4.75 5.00 5.25 4.75 5.00 5.25 V

Full scale output

(100 kΩ load)

Typ. 4.00V at +62Pa

Typ. 0.20V at –62Pa

4.00 4.00 4.00 4.00 V

Zero Pressure Output

2.10 0.250

0.250

Accuracy

(also see Figure 1)

0.5 0.6 0.2 0.3 0.1 0.2 0.2 0.3 0.1 0.2 % FS

(1)(2)

1.5 2 1.5 2 1 1.5 1 1.5 1 1.5 % m.v.

(1)

Repeatability 0.3 0.5 0.3 0.5 0.3 0.5 0.3 0.5 0.3 0.5 % m.v.

(1)

Offset stability 0

±0.1

±0.3

Pa / year

Additional error

over temperature

(T ≠ 23°C)

0.003

0.006

0.003

0.006

0 0 0 0 0 0 % FS/°C

(2)

0.03 0.05 0.03 0.05 0.03 0.05 0.03 0.05 0.03 0.05 % m.v./°C

Resolution < 30% FS

(1)

0.05 0.1 0.2 0.05 0.1 0.2

0.05 0.1 0.2 0.05 0.1 0.2 0.2 0.5 1 Pa

Resolution 30..70% FS

(1)

0.2 0.5 1.5 0.2 0.5 1.5 1 2.5 8 Pa

Resolution > 70% FS

(1)

1.5 2.2 3 1.5 2.2 3 8 11 14 Pa

(1)

FS = full scale or span, m.v. = measured value, i.e. reading, whichever value is bigger

(2)

FS = full scale or span, i.e. for the SDP1000 it is 500 Pa (2 “H2O), for the SDP1000-L025 it is 62 Pa (0.25 “H2O),

(3)

See 2.2 Voltage Output formula for conversion

Figure 1: Accuracy (includes errors caused by offset, linearity,

hysteresis and repeatability) of the SDP1000 -L (1), (2)

compared with typical membrane sensors (3).

Figure 2: Max. repeatability and offset drift/year of

the SDP1000-L (1) compared with two

typical membrane based sensors (2,3).

0 10 20 30 40 50 60 70 80 90 100

± error [ % of measured value]

differential pressure [% full scale]

0 1 2 3 4

offset drift/year [Pa]

repeatability [Pa]

(1)

(2)

(3)

(1)

SDP1000

(2,3) Membrane based sensors

(1)

SDP1000 / SDP2000 around

23°C

(2) SDP1000 / SDP2000 between

0°…50°C

(3) Typical membrane based

sensor with 1.5% FS error

between 10°…40°C

www.sensirion.com v5 February 2013 3/10

Table 2: Additional sensor specifications.

Media

Air, N

– for other gases contact Sensirion AG.

Operating Conditions:

- Temperature

- Humidity

-10 °C … +60 °C / 14°F … 140 °F

non-condensing

Ambient storage conditions

-40 °C … +80 °C / -40°F … 176 °F

Orientation sensitivity below resolution

Response time 40 ms (for faster response time contact Sensirion)

Admissible overpressure (short term) 1 bar (14.5 PSI)

Burst Pressure Capability 2 bar (29 PSI)

Weight 14 g

Protection Class IP 20

Wetted materials

Glass (silicon nitride, silicon oxide), Silicon, PPS (Polyphenylene Sulfide),

PEEK (Polyetheretherketone), FR4, Silicone as static sealing, Epoxy, Gold

Gas flow through sensor see Figure 6.

Lead free The SDP1000 family is fully RoHS compliant

(1)

For maximum 2 weeks

1.1 Temperature Compensation

The SDP1000 / SDP2000 differential pressure

sensors feature a sophisticated built-in temperature

compensation circuit. The temperature is measured

on the CMOSens chip by means of a PTAT 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 SDP1000 / SDP2000 differential pressure

sensors achieve their 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 SDP1000 / SDP2000 output. If

desired, this effect can be compensated by a

correction factor according to the following equation:

eff

= Dp

sensor

cal

/ P

amb

where Dp

eff

is the effective differential pressure,

sensor

the differential pressure indicated by the

SDP1000 / SDP2000, P

cal

the absolute pressure

during calibration (966 mbar) and P

amb

the actual

ambient absolute pressure.

This leads to the following correction factors:

Table 3: Altitude correction factors.

Altitude

[meter]

Ambient Pressure

amb

) [mbar]

Correction Factor

cal

amb

1013

0.95

250

984

0.98

425

966

1.00

500

958

1.01

750

925

1.04

1500

842

1.15

2250

766

1.26

3000

697

1.38

Example:

The SDP1000 is used at 750 m above sea level. The

output of the SDP1000 shows 0.5 V, which

corresponds to Dp

sensor

= 33.3 Pa. Taking into account

the correction factor P

cal

/ P

amb

= 1.04 the effective

differential pressure Dp

eff

is 33.3 Pa * 1.04 = 34.6 Pa.

Note:

In many HVAC applications such as filter monitoring,

fan/ventilator control or air flow measurement the

described effect is actually welcome since at the end

the mass flow and not volume flow is the effective

value to control.

P1-P3 P4-P6 P7-P9 P10-P10

SDP1000-R

Mfr. #:

Buy SDP1000-R

Manufacturer:

Sensirion

Description:

Board Mount Pressure Sensors Differ Pressure Sensor

Lifecycle:

New from this manufacturer.

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