ADC0804

ADC0804

ADC0804 (pdf) 

Simple to computerized converters find colossal application as a halfway gadget to change over the signs from simple to advanced structure. These advanced signs are utilized for further preparing by the computerized processors. Different sensors like temperature, weight, power and so forth change over the physical qualities into electrical signs that are simple in nature. 
ADC0804 is a usually utilized 8-bit simple to advanced convertor. It is a solitary channel IC, i.e., it can take one and only simple flag as info. The computerized yields shift from 0 to a most extreme of 255. The stride size can be balanced by setting the reference voltage at pin9. At the point when this pin is not joined, the default reference voltage is the working voltage, i.e., Vcc. The stride size at 5V is 19.53mV (5V/255), i.e., for each 19.53mV ascent in the simple information, the yield fluctuates by 1 unit. To set a specific voltage level as the reference esteem, this pin is joined with a large portion of the voltage. Case in point, to set a reference of 4V (Vref), pin9 is associated with 2V (Vref/2), along these lines diminishing the stride size to 15.62mV (4V/255). 
ADC0804 needs a clock to work. The time taken to change over the simple quality to computerized worth is subject to this clock source. An outer time can be given at the Clock IN pin. ADC 0804 likewise has an inbuilt clock which can be utilized as a part of nonappearance of outer clock. A suitable RC circuit is associated between the Clock IN and Clock R pins to utilize the inner clock.

Pin No	Function	Name
1	Activates ADC; Active low	Chip select
2	Input pin; High to low pulse brings the data from internal registers to the output pins after conversion	Read
3	Input pin; Low to high pulse is given to start the conversion	Write
4	Clock Input pin; to give external clock.	Clock IN
5	Output pin; Goes low when conversion is complete	Interrupt
6	Analog non-inverting input	Vin(+)
7	Analog inverting Input; normally ground	Vin(-)
8	Ground(0V)	Analog Ground
9	Input pin; sets the reference voltage for analog input	Vref/2
10	Ground(0V)	Digital Ground
11	8 bit digital output pins	D7
12		D6
13		D5
14		D4
15		D3
16		D2
17		D1
18		D0
19	Used with Clock IN pin when internal clock source is used	Clock R
20	Supply voltage; 5V	Vcc