78L03 DATASHEET PDF
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78L03 Datasheet PDF
Some sensors are ratio-metric and thus tolerate variations in VREF. Page 38 of datasheet shows a VREF pin. Tie that to VDD. Even an inexpensive TL will be okay at maximum conversion rate.
I will connect a voltage divider to the input of the ADC to measure the voltage. Bridges, such as strain gauges, are one such sensor.
If you want tighter tolerance than the 0. Your reported voltage will only datasheey as accurate as the VDD. I see no mention of internal reference in the Table of Contents.
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Remember to filter and decouple with a RC circuit if you do not have a separate Datashset regulator such as the 78L Post as a guest Name. This is a link to 78ll03 data sheet and a pic of the ADC operation conditions. You could use the supply voltage however that is usually a pretty crude and noisy reference source. Sign up using Email and Password. AngeloQ 1, 1 5 There is a paper discussing this, for a thermistor of Kohm; check on robustcircuitdesign. You must provide the reference voltage, which will directly affect the accuracy of your ADC.
I went through another document which was 18MB and found no Vref. I found the equations to calculate the result.
78L03 Datasheet catalog