1-100092-04 View Datasheet(PDF) - Unspecified

Part Name

Description

Manufacturer

1-100092-04

Humidity and Temperature Sensor

Unspecified 

Datasheet SHT7x (SHT71, SHT75)

Humidity and Temperature Sensor

• Fully calibrated

• Digital output

• Low power consumption

• Excellent long term stability

• Pin type package – easy integration

Product Summary

SHT7x (including SHT71 and SHT75) is Sensirion’s family

of relative humidity and temperature sensors with pins.

The sensors integrate sensor elements plus signal

processing in compact format and provide a fully

calibrated digital output. A unique capacitive sensor

element is used for measuring relative humidity while

temperature is measured by a band-gap sensor. The

applied CMOSens® technology guarantees excellent

reliability and long term stability. Both sensors are

seamlessly coupled to a 14bit analog to digital converter

and a serial interface circuit. This results in superior signal

quality, a fast response time and insensitivity to external

disturbances (EMC).

Dimensions

3.7

3.1

2.2

B2G

71

1.2

0.6

1234

0.46

1.27

5.08

0.2

2.0

Figure 1: Drawing of SHT7x (applies to SHT71 and SHT75)

sensor packaging, dimensions in mm (1mm = 0.039inch).

Contact assignment: 1: SCK, 2: VDD, 3: GND, 4: DATA.

Hatched item on backside of PCB is a 100nF capacitor – see

Section 2.1 for more information.

Each SHT7x is individually calibrated in a precision

humidity chamber. The calibration coefficients are

programmed into an OTP memory on the chip. These

coefficients are used to internally calibrate the signals

from the sensors. The 2-wire serial interface and internal

voltage regulation allows for easy and fast system

integration. The small size and low power consumption

makes SHT7x the ultimate choice for even the most

demanding applications.

SHT7x is supplied on FR4 with pins which allows for easy

integration or replacement. The same sensor is also

available surface mountable packaging (SHT1x) or on flex

print (SHTA1).

Sensor Chip

SHT7x V4 – for which this datasheet applies – features a

version 4 Silicon sensor chip. Besides a humidity and a

temperature sensor the chip contains an amplifier, A/D

converter, OTP memory and a digital interface. V4 sensors

can be identified by the alpha-numeric traceability code on

the sensor cap – see example “B2G” code on Figure 1.

Material Contents

While the sensor is made of a CMOS chip the sensor

housing consists of an LCP cap with epoxy glob top on an

FR4 substrate. Pins are made of a Cu/Be alloy coated with

Ni and Au. The device is fully RoHS and WEEE compliant,

thus it is free of Pb, Cd, Hg, Cr(6+), PBB and PBDE.

Evaluation Kits

For sensor trial measurements, for qualification of the

sensor or even experimental application of the sensor

there is an evaluation kit EK-H2 available including sensor,

hard and software to interface with a computer.

For more sophisticated and demanding measurements a

multi port evaluation kit EK-H3 is available which allows for

parallel application of up to 20 sensors.

Version 4.1 – July 2008

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