unstable output of ADC0804

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amrbem

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hi all,

i'm a begginer
i tried to connect anADC0804 in the free running mode, but the out put is stable at a constant value or oscillating rapidly and it does no respond to the input.

i used the schematic in the datasheet .

please help me
 

use mazidi's book on 8051

check that you have a low capacity capacitor (1 nf) between VCC and GND
 

see this
**broken link removed**

it is due the wrong connection

Bibin John
www.bibinjohn.tk
 

May your power supply is not regulated.
 

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