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PSoC EZ-BLE Thermistor Vhi & Vlow pin connections? | Cypress Semiconductor

PSoC EZ-BLE Thermistor Vhi & Vlow pin connections?

Summary: 1 Reply, Latest post by Bob Marlowe on 20 Sep 2016 11:29 PM PDT
Verified Answers: 1
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Frederick Hess's picture
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14 posts

The Thermistor object shows an upper resistor connected to Vdd (also called Vhi). The thermistor is connected in series to Ground (also called Vlow). VT is the voltage between the upper resistor and thermistor. In the Thermistor datasheet (and associated sample temperature projects) Vhi & Vlow look like physical pins connected to the ADC.  Does the Thermistor API really need the ADC to measure Vhi & Vlow? I was planning to use Vdd as the ADC voltage reference and let Vlow be defined as zero V. Thanks for your guidance.

user_1377889's picture
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9834 posts

The Vlow measurement is to cancel any ADC offset. There is an apnote explaining that, have a look at.

 

Bob

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