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Humidity and Temperature Sensor Solutions Guide

Humidity and Temperature Sensor Solutions Guide
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Humidity and Temperature Sensor Solutions Guide - 1

Humidity and Temperature Sensors FEATURES • elative Humidity Sensor: R • ± 4.5% RH (maximum @ 20–80% RH) • Temperature Sensor: • ±0.5 ºC accuracy (typical) • ±1 ºC accuracy (maximum @ 0 to 70 °C) • 0 to 100% RH operating range • –40 to +85 ºC (-GM) • 0 to +70 ºC operating range (-FM) • Wide operating voltage range (2.1 to 3.6 V) • Low Power Consumption: 240 μA during RH conversion • I2C host interface • Integrated on-chip heater • 4 mm x 4 mm QFN package DIGITAL 12C HUMIDITY AND TEMPERATURE SENSORS • Excellent long term stability The Si7005 is a digital relative humidity and temperature sensor. This monolithic CMOS IC • Factory calibrated integrates temperature and humidity sensor elements, an analog-to-digital converter, signal • Optional factory-installed filter/cover processing, calibration data, and an I C host interface. The patented use of industry-standard, low-K polymeric dielectrics for sensing humidity enables the construction of a low-power, • Protection during reflow monolithic CMOS sensor IC with low drift and hysteresis and excellent long term stability. Both • Excludes liquids and particulates (hydrophobic/oleophobic) the temperature and humidity sensors 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. The Si7005 is packaged in a 4 mm x 4 mm QFN package and is reflow solderable. • Industrial HVAC/R • Thermostats/humidistats Humidity Sensor Sensor Temperature Sensor Control Logic • Respiratory therapy I2C pullups may be integrated in microcontroller • White goods • Micro-environments/data centers • Automotive climate control and de-fogging • Asset and goods tracking LOWEST POWER INTEGRATED RH SENSOR MORE INFORMATION AND DOCUMENTATION DOWNLOADS AT: www.silabs.com/humidity-sensor Engineering for a mixed-signal world.

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Humidity and Temperature Sensor Solutions Guide - 2

Humidity and Temperature Sensors Si7005 Development Tools The Si7005 is supported by a suite of hardware and software development tools that facilitate testing/characterization, prototyping and software development. The Si7005USB-DONGLE Evaluation kit comes with everything developers need to demonstrate and evaluate the Si7005. The board plugs into a PC via a USB socket. It has a connector for adding the Si7005USB-EVB. The optional Si7005-EVB is a small daughter card that permits evaluation of the Si7005 at the end of a flex cable. It is a useful add-on to the Si7005USB-DONGLE (it plugs...

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