Datasheet

Data Sheet
Power circuit and measurement circuit
Parameter
RED sensor/OX sensor
Symbol Typ Min Max Unit
Heating power P
H
76/43 71/30 81/50 mW
Heating voltage V
H
2.4/1.7 - - V
Heating current I
H
32/26 - - mA
Heating resistance
at nominal power
R
H
74/66 66/59 82/73
Ω
Rating Symbol Value / Range Unit
Maximum heater power dissipation P
H
88 (RED sensor)/50 (OX
sensor)
mW
Maximum sensitive layer power dissipation Ps 8 mW
Voltage supplyHeating current Vsupply 4.9 – 5.1 V
Relative humidity range RH 5 – 95 %RH
Ambient operating temperature Tamb -30 – 85 °C
Storage temperature range Tsto -40 – 120 °C
Storage humidity range RHsto 5 - 95 %RH
MiCS-4514
0278 rev 16
MiCS-4514 with measurement circuit (top view)
The two voltages measured on the load resistors are
directly linked to the resistances of the RED and OX sensors
respectively. RLOAD must be 820 Ω at the lowest in order
not to damage the sensitive layer.
MiCS-4514 with recommended supply circuit (top view)
RDRED is a 82 Ω and RDOX is a 133Ω. These resistors are
necessary to obtain the right temperatures on the two
independant heaters while using a single 5V power supply.
The resulting voltages are typically VHRED = 2.4V and
VHOX= 1.7V.
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