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MiCS-5525 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - CO Sensor - e2v

भाग संख्या MiCS-5525
समारोह CO Sensor
मैन्युफैक्चरर्स e2v 
लोगो e2v लोगो 
पूर्व दर्शन
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<?=MiCS-5525?> डेटा पत्रक पीडीएफ

MiCS-5525 pdf
MEASUREMENT CIRCUIT EXAMPLE
As shown below, the sensitive resistance is measured
using a load resistor.
Gas VCC
Sensor
33 22
VH 4411
RL
VS
GND
Figure 3: MiCS-5525 with measurement circuit (top
view)
The voltage measured on the load resistor is a direct
measure of the resistance of the sensor. RL must be equal
or greater than 820 Ω in order not to damage the sensing
layer.
ELECTRICAL CHARACTERISTICS
Rating
Maximum heater power
dissipation
Maximum sensitive
layer power dissipation
Voltage supply
Relative humidity range
Ambient operating
temperature
Storage temperature
range
Storage humidity range
Symbol
PH
PS
Vsupply
RH
Tamb
Tsto
RHsto
Value/Range Unit
88 mW
8
4.9 - 5.1
5 - 95
-30 - 85
mW
V
%RH
°C
-40 - 120
5 - 95
°C
%RH
OPERATING CONDITIONS
Parameter
Symbol Typ Min Max Unit
Heating power
PH 76 71 81 mW
Heating voltage
VH 2.4 - - V
Heating current
Heating resistance at
nominal power
IH
RH
32 -
- mA
74 66 82 Ω
SENSITIVITY CHARACTERISTICS
Characteristic
Symbol Typ Min Max Unit
CO detection range
FS
1 1000 ppm
Sensing resistance in
air (see note 1)
Sensitivity CO 60 ppm
(see note 2)
R0
S60
- 100 1500 kΩ
- 5 50 -
Notes:
1. Sensing resistance in air, R0, is measured under
controlled ambient conditions, i.e. synthetic air at 23 ± 5
°C and 50 ± 10%. Sampling test.
2. Sensitivity CO 60 ppm is defined as RS in air divided by
RS at 60 ppm CO. Test conditions are 23 ± 5 °C and 50
± 10% RH. Indicative values only, sampling test.
IMPORTANT PRECAUTIONS
Read the following instructions carefully before using
the MiCS-5525 described in this document to avoid
erroneous readings and to prevent the device from
permanent damage.
The sensor must be reflow soldered in a neutral
atmosphere, without soldering flux vapours.
The sensor must not be exposed to high concentrations
of organic solvents, ammonia, silicone vapour or
cigarette-smoke in order to avoid poisoning the
sensitive layer.
Heater voltages above the specified maximum rating
will destroy the sensor due to overheating.
This sensor is to be placed in a filtered package that
protects it against water and dust projections.
e2v strongly recommends using ESD protection
equipment to handle the sensor.
For any additional questions, contact e2v.
© e2v technologies (uk) limited 2009
Document subject to disclaimer on page 1
A1A-MiCS-5525 Version 2, page 2

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