Reducing The Sensor's Thermal Mass; Hdc2022Evm: Pc Interface And Sensor Module; Hdc2022Evm: Pc Interface And Smaller Sensor Module - Texas Instruments HDC2022EVM User Manual

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5.4

Reducing the Sensor's Thermal Mass

The HDC2022EVM can be broken into 2 sections to isolate the thermal mass of the µC from the
HDC2022. Figure 13
The communication between the two modules is ensured through the connector J1 and J2 and a 5-wire
cable. In this configuration the thermal mass of the EVM is dramatically reduced, improving the
temperature measurements performances of the HDC2022. The cable connecting J1 to J2 must conform
to I2C cable length constraints. When used in this configuration, the GUI can still be used to communicate
with the EVM and collect data.
If the thermal mass of the sensor section is still excessive, the sensor section can be reduced by breaking
it at the perforation shown in
Figure 14. HDC2022EVM: PC Interface and Smaller Sensor Module
Also in the case where the EVM is broken into two sections it is still possible to use the GUI (ensuring the
connections between the modules) or alternatively it is possible to connect the sensor module to a custom
micro-controller. (Refer to
SNIU039 – December 2019
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shows the board perforations that allow the two sections to be broken apart.
Figure 13. HDC2022EVM: PC Interface and Sensor Module
Figure 14. The PCB segment that hosts the HDC2022 is 5.5mm x 5mm.
Figure 15).
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EVM Hardware
HDC2022EVM User's Guide
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