Hello,
I have built the LED test circuit as described on page 12 of the ADC0804 datasheet. Everything is working correctly, but one thing is confusing me. When pin 6 is at 0 volts, the LEDs are all lit as expected. Then when I apply 5 volts to pin 6 it takes almost 1 second for the LEDs to cycle from all on to all off. The chip seems to pass through all 256 possible values before settling to 0.
The datasheet claims that the chip runs at 8888 conversions/second when in free-running mode, so why does it take so long when changing the input voltage from 0 to 5?
Cheers,
Ben
I have built the LED test circuit as described on page 12 of the ADC0804 datasheet. Everything is working correctly, but one thing is confusing me. When pin 6 is at 0 volts, the LEDs are all lit as expected. Then when I apply 5 volts to pin 6 it takes almost 1 second for the LEDs to cycle from all on to all off. The chip seems to pass through all 256 possible values before settling to 0.
The datasheet claims that the chip runs at 8888 conversions/second when in free-running mode, so why does it take so long when changing the input voltage from 0 to 5?
Cheers,
Ben