10-07-2012, 12:36 PM
IC ADC0808
[attachment=27342]
ADC0808.pdf
ADC0808 is an 8 bit analog to digital converter with eight input analog
channels, .e., it can take eight different analog inputs. The input which is to be
converted to digital form can be selected by using three address lines. The
voltage reference can be set using the Vref+ and Vref- pins. The step size is
decided based on set reference value. Step size is the change in analog input to
cause a unit change in the output of ADC. The default step size is 19.53mV
corresponding to 5V reference voltage. ADC0808 needs an external clock to
operate unlike ADC0804 which has an internal clock. The ADC needs some
specific control signals for its operations like start conversion and bring data to
output pins. When the conversion is complete the EOC pins goes low to indicate
the end of conversion and data ready to be picked up.
[attachment=27342]
ADC0808.pdf
ADC0808 is an 8 bit analog to digital converter with eight input analog
channels, .e., it can take eight different analog inputs. The input which is to be
converted to digital form can be selected by using three address lines. The
voltage reference can be set using the Vref+ and Vref- pins. The step size is
decided based on set reference value. Step size is the change in analog input to
cause a unit change in the output of ADC. The default step size is 19.53mV
corresponding to 5V reference voltage. ADC0808 needs an external clock to
operate unlike ADC0804 which has an internal clock. The ADC needs some
specific control signals for its operations like start conversion and bring data to
output pins. When the conversion is complete the EOC pins goes low to indicate
the end of conversion and data ready to be picked up.