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Humirel HTG3500 Series Datasheet / HPC123 Rev B November 2007

1

HTG3500 Series

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.

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)

Maximum Ratings

Storage Temperature

- 40 to +125

°C

Supply Voltage (Peak)

20

Humidity Operating Range

RH

0 to 100

%RH

Temperature Operating Range

-40 to +110

°C

Maximum Output Current (Peak)

3

mA

Maximum Power

Pd

10

mW

Peak conditions: less than 10% of the operating time.

Electrical Characteristics

Humidity Measuring Range

RH

0

100

%RH

Relative Humidity Accuracy (10% to 95%RH)

±3

±5

%RH

Temperature coefficient (10°C to 50°C)

-0.05

-0.1

%RH/°C

Recovery time after 150 hours of condensation

t

10

s

Humidity hysteresis

+/-1

%RH

Output impedance

Z

50

Ω

I

1

mA

Warm up time

150

ms

τ

5

10

s

(1) Conditions of sink current: Vout + 0.054V (3%RH) at Vout = 0.600 V (Vout min)

(2) At 1m/s air flow

*

Nominal resistance @ 25°C

R

9.9

10

10.1

k

Beta value : B25/50

B

3346

3380

3414

K

Temperature measuring range

-40

85

°C

Nominal Resistance Tolerance at 25°C

1

%

B value tolerance

B

1

%

Time Constant

10

s

* Except for low temperatures

OPERATING RANGE

0

25

50

75

100

-40

-20

0

20

40

60

80

100

TEMPERATURE IN °C

Maximum Humidity

of 250g/kg

Peak Condition

at 450g/kg