Data Sheet

ManualsBrandsIST Sensor ManualsActive ComponentsDigital Humidity And Temperature Sensor Digital humidity/temperature sensor

All mechanical dimensions are valid at 25°C ambient temperature, if not differently indicated.  All data except the mechanical dimensions only have information purposes and are not to be

understood as assured characteristics.  Technical changes without previous announcement as well as mistakes reserve.  The information on this data sheet was examined carefully and will be

accepted as correct; No liability in case of mistakes.  Load with extreme values during a longer period can affect the reliability.

Released 09/2011 Rights reserved for change in technical data!

HYGROCHIP

1/3

DIGITAL HUMIDITY SENSOR

HYT-271

Characteristic features

 Measuring range 0 … 100 % rH, -40 … 125°C

 Accuracy ±1.8 % rH, ±0.2 °C

 Digital I²C Interface to /C

 Precisely calibrated and temperature com-

pensated

 Chemical resistant, dew formation resistant

 Low Hysteresis, compensated Linearity

error and Temperature drift

 Operating voltage 2.7 … 5.5V

 Current consumption (Nominal) 1µA (25°C,

sleep-mode)

 High quality ceramic substrate

 SIL-connections, plug-in type, RM 1.27 mm

 Miniaturised construction, fully inter-

changeable

 Mechanically robust

 Optimum price performance ratio

 RoHS conformance

Typical areas of application

 Handheld measurement instruments

 Humidity transmitters

 Industrial applications

 Measuring & Sensor Technology

Features

HYT 271 – the powerful allround talent of the

HYGROCHIP product series

Mechanically robust, chemical resistant and dew

formation resistant, this digital humidity sensor with

only 10.2 x 5.1 x 1.8 mm size offers the widest

application window and an optimal price perform-

ance ratio. Precisely calibrated, the HYT 271 deliv-

ers an accuracy of ±1.8 % rH and ±0.2 °C - ideal for

sophisticated mass applications, industrial hand-

held devices and precise humidity transmitters. Like

all representatives of the HYGROCHIP family, the

sensor combines the advantages of a precise,

capacitive polymer humidity sensor with the high

integration density and functionality of an ASIC.

The signal processing integrated in the sensor

completely processes the measured data and di-

rectly delivers the physical parameters of relative

humidity and temperature over the I²C compatible

interface as digital values.

The module is precisely calibrated by the manufac-

turer and is therefore fully interchangeable without

adjustment. Both the linearity error as well as tem-

perature drift are corrected “OnChip” through com-

putation resulting in an outstanding accuracy over a

wide range of application. The high chemical resis-

tance, dew formation resistant design and an excel-

lent long term stability speaks for itself.

Further variants and the full spectrum of

HYGROCHIP product series can be found at:

http://www.ist-ag.com

Summary of content (3 pages)

PAGE 1
HYGROCHIP DIGITAL HUMIDITY SENSOR HYT-271 Measuring range 0 … 100 % rH, -40 … 125°C Accuracy ±1.8 % rH, ±0.2 °C Digital I²C Interface to /C Precisely calibrated and temperature compensated Chemical resistant, dew formation resistant Low Hysteresis, compensated Linearity error and Temperature drift Operating voltage 2.7 … 5.5V Current consumption (Nominal) 1µA (25°C, sleep-mode) High quality ceramic substrate SIL-connections, plug-in type, RM 1.
PAGE 2
HYGROCHIP DIGITAL HUMIDITY SENSOR HYT-271 Relative humidity accuracy Humidity measurement Humidity measuring range (3) 0 ... 100% rH see Figure 3 Humidity accuracy (1) ±1.8% rH (0 ... 80% rH) see Figure 1 Reproducibility (2) ±0.2% rH Hysteresis < ±1% rH Humidity resolution 0.03% rH Linearity error < ±1% rH Response time t63 < 4 sec Tk Residual error 0.05% rH / K (0 ... 60 °C) Long term drift < 0.
PAGE 3
Further information about the component can be found at: http://www.ist-ag.com Operating voltage 2.7 … 5.5 V Current consumption (Nominal) < 22HA at 1Hz measuring rate 850 HA maximum Current consumption (Sleep) < 1HA Application temperature -40 °C ... 125 °C Humidity application range 0 ... 100% rH Digital Interface I²C, address 0x28 or alternative address Limits Operating voltage -0.3 … 6.0 V Storage temperature -50 °C ...