Datasheet

Data Sheet
Package outline dimensions
The package is compatible with SMD assembly process.
Operating conditions
The heating power is typically 80 mW and 43
mW for the RED and OX sensor respectively.
Heating voltage is 2.35 and 1.7 V.
Heating current is 34 and 26 mA.
Heating resistance at nominal power is 74 and
66 ohm.
The resistance under air is 100 – 1500 kohm for
the RED sensor and 0.8 – 20 kohm for the OX
sensor.
MiCS-4514
0278 rev 16
Sensor configuration
The silicon gas sensor structure consists of an accurately micro machined diaphragm with an
embedded heating resistor and the sensing layer on top.
The MiCS-4514 includes two sensor chips with independent heaters and sensitive layers. One sensor
chip detects oxidising gases (OX) and the other sensor detects reducing gases (RED). The internal
connections are shown above.
Pin Connection
A Rh1 OX
B Rs1 OX
C Rh1 RED
D Rs1 RED
E NC
F Rh2 RED
G Rs2 RED
H Rh2 OX
J Rs2 OX
K NC
MiCS-4514 configuration (bottom view)
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