Sensirion SHT85 Handleiding
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www.sensirion.com / D1 Version 1.0 November 1/8 –2018
Transitioning from SHT7x to SHT85
Feature Comparison and High Level Integration Guide
Summary
The SHT7x not recommended for new designs and will be succeeded by the SHT85. The last order date for is
the SHT7x is 31 December 2018 and the last delivery date is 31 December 2019. It is recommended to further
process the SHT7x sensors within 2 years after date of delivery .
The functionality of the SHT85 covers the functionality of the SHT7x, and has a number of additional benefits.
The SHT85 is pin-compatible and has a similar form factor to the SHT7x series. The SHT85 is equipped with a
completely new and optimized humidity and temperature chip, which allows for increased reliability and
improved accuracy specifications. The more robust and reliable design makes integration and replacement
easier. Some key features of the SHT7x and SHT85 are compared below:
Parameter
SHT85
SHT7x
Product dimensions (mm
3
)
17.8 4.9 x 2.1 x
19.5 x 5.08 x 3.1
Pin-assignment and pitch
Identical
Interface
I2C
Digital Sbus
Typical application circuit
R
pull up
on SDA and SCL
R
pull up
on SDA
Filter membrane
Standard included
Not available
VDD Range (V)
2.15 to 5.5
2.4 to 5.5
Typ. RH accuracy (%)
±1.5 @0-80%RH
SHT71: ±3 @20-80% RH
SHT75: ±1.8 @10-90%RH
Typ. T accuracy (°C)
±0.@20-50°C 1
±0.3 @25°C
To transition from the SHT7x to the SHT85, firmware changes are required as all newest generation CMOSens®
chips use I2C. Although the typical application circuit uses a pull-up resistor on both the SDA (data line) and
SCL (clock line), it is possible to drive the SCL pin by a push-pull circuit without pull-up resistor. Furthermore,
hardware changes may be required due to changes in the packaging dimensions.
This guide does not intend to list all differences between both products, nor is it a fully comprehensive manual
on how to do the integration of the SHT85. For a full overview of the specifications and functionality, please refer
to the SHT85 datasheet.
Product specificaties
| Merk: | Sensirion |
| Categorie: | sensor |
| Model: | SHT85 |
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