Compliant with RoHS regulations
RELATIVE HUMIDITY AND TEMPERATURE MODULE
Based on the rugged HUMIREL humidity sensor, the HTG3500 series are dedicated humidity and temperature plug and
play transducers designed for OEM applications where reliable and accurate measurements are needed. Direct interface
with a micro-controller is made possible with the modules humidity linear voltage and direct NTC outputs. The
HTG3500 series are designed for high volume and demanding applications where power consumption is critical.
HTG3500 Series
•
HTG3500 SERIES GENERAL CHARACTERISTICS
Main Features
Suitable for small bulk assembly
Product free from Lead, Cr (6+), Cd and Hg. Compliant with RoHS
Reliability not affected by repeated condensation
Full interchangeability. Better than +/-3%RH and +/-0.25°C
Demonstrated reliability and long term stability
Humidity calibrated within +/- 3% RH @ 55% RH
Temperature measurement through NTC direct output
Ratiometric to voltage supply within the specified range
HTG3500 Series are also available with a Humidity Linear Frequency Output: HTG3400 Series (HPC124_0)
OPERATING RANGE
100
Peak Condition
at 450g/kg
Maximum Ratings
Storage Temperature
Supply Voltage (Peak)
Humidity Operating Range
Temperature Operating Range
Maximum Output Current (Peak)
Maximum Power
T
stg
V
cc
RH
T
a
I
peak
Pd
- 40 to +125
20
0 to 100
-40 to +110
3
10
°C
V
dc
%RH
°C
mA
mW
RELATIVE HUMIDITY IN %RH
75
Maximum Humidity
of 250g/kg
50
25
0
-40
-20
0
20
40
60
80
100
TEMPERATURE IN °
C
Peak conditions:
less than 10% of the operating time.
Electrical Characteristics
(@T=23°C, R
L
>1MΩ unless otherwise noted)
Humidity Measuring Range
Relative Humidity Accuracy (10% to 95%RH)
Temperature coefficient (10°C to 50°C)
Recovery time after 150 hours of condensation
Humidity hysteresis
Output impedance
Sink current capability (R
L_Min
= 8 kOhms)
(1)
Warm up time
Time Constant (at 63% of signal) 33%RH to 75%RH
(2)
(1)
(2)
RH
T
cc
t
Z
I
t
w
τ
0
±3
-0.05
10
+/-1
100
±5
-0.1
50
1
150
5
10
%RH
%RH
%RH/°C
s
%RH
Ω
mA
ms
s
Conditions of sink current: Vout + 0.054V (3%RH) at Vout = 0.600 V (Vout min)
At 1m/s air flow
*
Nominal resistance @ 25°C
Beta value : B25/50
Temperature measuring range
Nominal Resistance Tolerance at 25°C
B value tolerance
Time Constant
*
Except for low temperatures
R
B
T
a
R
n
B
9.9
3346
-40
10
3380
1
1
10
10.1
3414
85
k
K
°C
%
%
s
________________________________________________________________________________________
Humirel HTG3500 Series Datasheet / HPC123 Rev B November 2007
1