TH02

Tel:+86-755-82973805 Fax: +86-755-82973550

Email:sales@hoperf.com

http://www.hoperf.com

-

Notes:

1.

The TH02 has a nominal output of 32 codes /°C, with 0000 = –50 °C

2.

3.

Actual response times will vary dependent on system thermal mass and air-flow.

Parameter

Symbol

Test

Condition

Min

Typ

Max

Unit

Ambient Temperature under Bias

–55

—

125

°C

Storage Temperature

–65

—

150

°C

Voltage on SDA or SCL pin with respect

to GND

–0.3

—

3.9

V

–0.3

—

4.2

V

Notes:

1.

Absolute maximum ratings are stress ratings only; operation at or beyond these conditions is not implied and may

shorten the life of the device or alter its performance.

2.

For best accuracy, after removal from the sealed shipping bags, the TH02 should be stored in climate controlled

conditions (10 to 35 °C, 20 to 60 %RH). Exposure to high temperature and/or high humidity environments can cause a

small upwards shift in RH readings.

2. Functional Description

2.1. Overview

The TH02 is a digital relative humidity and temperature sensor. This monolithic CMOS IC integrates temperature

interface. Both the temperature and humidity sensors on each unit are factory-calibrated and the calibration data is

stored in the on-chip non-volatile memory. This ensures that the sensors are fully interchangeable, with no

recalibration or software changes required.

While the TH02 is largely a conventional mixed-signal CMOS integrated circuit, relative humidity sensors in

general and those based on capacitive sensing using polymeric dielectric have unique application and use

requirements that are not common to conventional (non-sensor) ICs. Chief among those are:

The need to protect the sensor during board assembly, i.e., solder reflow, and the need to subsequently

rehydrate the sensor.

The need to protect the sensor from damage or contamination during the product life-cycle

The impact of prolonged exposure to extremes of temperature and/or humidity and their potential affect on

sensor accuracy

The effects of humidity sensor "memory"

The need to apply temperature correction and linearization to the humidity readings

Each of these items is discussed in more detail in the following sections.