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45N10 pdf Datasheet P1 Part Num IC-ON-LINE
I will connect a voltage divider to the input of the ADC to measure the voltage. I found the equations to calculate the result. This is a link to the data sheet and a pic of the ADC operation conditions. You must provide the reference voltage, which will directly affect the accuracy of your ADC.
You could use the supply voltage however that is usually a pretty crude and noisy reference source. A reasonable choice would be an external 2. You can go as low as 1. The Varef pin has high impedance when the converter is not operating, however it draws 30pC typically per conversion.
Even an inexpensive TL will be okay at maximum conversion rate. If you want tighter tolerance than the 0.
78L03 Datasheet PDF
Page 38 of datasheet shows a VREF pin. Tie that to VDD. Your reported voltage will only be as accurate as the VDD. Some sensors are ratio-metric and thus tolerate variations in VREF.
Home Questions Tags Users Unanswered.
Spehro Pefhany k 4 AngeloQ 1, 1 5 I see no mention of internal reference in the Table of Contents. I went through another document which was 18MB and found no Vref.
ADC just survives with external ref.
Remember to filter and decouple with a RC circuit if you do not have a separate Vref regulator such as the 78L Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password.
78L09 PDF डेटा पत्रक – Three-terminal positive voltage regulator