Würth Elektronik 2525020210091, 2525020210001 User Guide
EVALUATION BOARD MANUAL
HUMIDITY SENSOR WITH INTEGRATED
TEMPERATURE SENSOR
Evaluation board order code Sensor order code
2525020210091 2525020210001
VERSION 1.0
NOVEMBER 6, 2020
Revision history
Manual
version
1.0 1.0
Product
version
Notes
• Initial release of the manual
Date
September 2020
Humidity sensor Evaluation Board, Part Nr. 2525020210091
User manual version 1.0 © November2020
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Abbreviations
Abbreviation Description
I2C Inter integrated circuit
LSB Least significant bit
MEMS Micro electro mechanical system
SPI Serial peripheral interface
SMD Surface mount device
Humidity sensor Evaluation Board, Part Nr. 2525020210091
User manual version 1.0 © November2020
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Contents
1 General description 4
1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Functional description 5
2.1 Evaluation board in operation . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1.1 Pin header connection . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1.2 Through hole connection . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Evaluation board 8
3.1 Schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4 Important notes 9
4.1 General customer responsibility . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2 Customer responsibility related to specific, in particular safety-relevant ap-
plications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.3 Best care and attention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.4 Customer support for product specifications . . . . . . . . . . . . . . . . . . 9
4.5 Product improvements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.6 Product life cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.7 Property rights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.8 General terms and conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5 Legal notice 11
5.1 Exclusion of liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.2 Suitability in customer applications . . . . . . . . . . . . . . . . . . . . . . . 11
5.3 Usage restriction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6 License terms for Würth Elektronik eiSos GmbH & Co. KG sensor product
software and source code 13
6.1 Limited license . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.2 Usage and obligations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6.3 Ownership . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.4 Disclaimer of warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.5 Limitation of liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.6 Applicable law and jurisdiction . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.7 Severability clause . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.8 Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Humidity sensor Evaluation Board, Part Nr. 2525020210091
User manual version 1.0 © November2020
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1 General description
R1
1.1 Introduction
The evaluation board of the humidity sensor provides the opportunity to verify the sensor
performance and develop a prototype using an external processor e.g. Amber Pi design
kit (Part No: 2609017281001). The evaluation board can be directly connected to Amber
Pi design kit using the mounted I2C or SPI connectors. The evaluation board can also be
mounted on a bread board using through hole pin header connections. The humidity sensor
(Part No: 2525020210001) is a 16-bit digital ultra-low-power with an integrated temperature
sensor.
Figure 1: Evaluation board of the humidity sensor
Humidity sensor Evaluation Board, Part Nr. 2525020210091
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2 Functional description
The humidity sensor evaluation board supports both the standard I2C and SPI communication interfaces.
• A positive supply voltage is applied to the sensor through VDD pin and negative supply
voltage through GND pin.
• The I2C communication interface is enabled by connecting CS pin to VDD. The CS pin
is connected to VDD using 100kΩ resistor R3.
• The SPI communication interface is enabled by removing the resistor R3 between CS
pin to VDD.
I2C communication interface is enabled in the evaluation board by default. The
7-bit slave address of the humidity sensor is 1011111b (0x5F)
Pin
No.
1 VDD VDD Positive supply voltage Supply
2 SCL SCL I2C serial clock Input
3 INT INT Data ready output signal Output
4 SDA SDA I2C serial data Input/Output
5 GND GND Negative supply voltage Supply
6 CS CS I2C enable/disable Input
Evaluation
board pins
SPI communication is enabled by removing the resistor R3
Sensor
pins
Description Input/Output
Table 1: Pin description
Refer to the data sheet of the humidity sensor (Part No: 252502021001) for
information of the electrical properties.
Humidity sensor Evaluation Board, Part Nr. 2525020210091
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