Advertisement
Pmod HYGRO Reference Manual
Revised February 22, 2017
This manual applies to the Pmod HYGRO rev. A
Overview
The Digilent Pmod HYGRO (Revision A) is small relative humidity and temperature sensor. With the
you can determine the relative humidity of the environment with up to 14 bits of resolution.
The Pmod HYGRO.
1
Functional Description
The Pmod HYGRO is designed to digitally report the relative humidity and ambient temperature upon request by
the host board. Up to 14-bits of resolution for each sensor may be collected by allowing for longer conversion
times. A resistive heating element can be enabled to drive off condensation that accumulates on the sensor after
being exposed at high humidity conditions.
2
Specifications
Parameter
Power Supply Voltage
Serial Clock Frequency
DOC#: 510-347
Other product and company names mentioned may be trademarks of their respective owners.
Features:
Relative humidity accuracy ±2%
Temperature sensor accuracy 0.2 °C
Good stability at high humidity
14-bit measurement resolution
Internal resistive heating element
6-pin Pmod connector with I²C interface
Pass-through Pmod host port for daisy chaining
Min
Typical
2.7
3
10
Copyright Digilent, Inc. All rights reserved.
1300 Henley Court
Pullman, WA 99163
www.digilent.com
TI
Max
Units
5.5
V
400
kHz
509.334.6306
HDC1080,
Page 1 of 6
Advertisement
Table of Contents
Summary of Contents for Digilent Pmod HYGRO
-
Page 1: Functional Description
The Pmod HYGRO. Functional Description The Pmod HYGRO is designed to digitally report the relative humidity and ambient temperature upon request by the host board. Up to 14-bits of resolution for each sensor may be collected by allowing for longer conversion times. -
Page 2: Configuration Register
400 kHz, users can both configure and read from the Pmod HYGRO. Header J2 on the Pmod HYGRO passes through all of the signals present on the main Header J1 to allow for the daisy chaining of multiple I²C compatible modules. - Page 3 Table 4. Typical conversion times. Upon device power-up, the Pmod HYGRO requires at least 15 ms prior to being able to perform a measurement. To perform a measurement, users need to configure (or accept) the measurement settings in the Configuration Register, and then trigger the measurement(s) by sending an I²C write transaction along with the address pointer...
-
Page 4: Timing Diagram
(3.3V/5V) (3.3V/5V) The Pmod HYGRO is an ideal Pmod to use in long term humidity test application. As a very low power Pmod between measurements, long term data to measure humidity changes in an environment can easily be collected. Any external power applied to the Pmod HYGRO must be within 2.7V and 5.5V to ensure that the on-board chips operate correctly;... -
Page 5: Physical Dimensions
More specific information about how to use the Pmod HYGRO can be found by checking out the additional resources on the Pmod HYGRO Resource Center. - Page 6 Pmod HYGRO Reference Manual If you have any questions or comments about the Pmod HYGRO, feel free to post them under the appropriate section (“Add-on Boards”) of the Digilent Forum. Copyright Digilent, Inc. All rights reserved. Page 6 of 6...
Need help?
Do you have a question about the Pmod HYGRO and is the answer not in the manual?
Questions and answers