78L03 DATASHEET PDF
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You must provide the reference voltage, which will directly affect the accuracy of your ADC. Have you examined the code-spread caused by external noise sources that couple into your sensor, or into your wiring between sensor and ADC, or into your ADC IC?
Bridges, such as strain gauges, are one daasheet sensor. I went through another document which was 18MB and found no Vref. Tie that to VDD. Page 38 of datasheet shows a VREF pin.
This is a link to the data sheet and a pic of the ADC operation conditions. The Varef pin has high impedance when the converter is not operating, however it draws 30pC typically per conversion.
Post as a guest Name. Sign up or log in Sign up using Google. Even an inexpensive TL will dataaheet okay at maximum conversion rate.
I found the equations to calculate the result. Home Questions Tags Users Unanswered.
78L03 – Three-Terminal Voltage Regulator
Sign up using Facebook. There is a paper discussing this, for a thermistor of Kohm; check on robustcircuitdesign. AngeloQ 1, 1 5 You can go dataaheet low as 1. I see no mention of internal reference in the Table of Contents. Sign up using Email and Password.
78L03 데이터시트(PDF) – Guangdong Kexin Industrial Co.,Ltd
A reasonable choice would be an external 2.
You could use the supply voltage however that is usually a pretty crude and noisy reference source. Your reported voltage will only be as accurate as the VDD.