Arduino Projects    |   Raspberry Pi  |     Electronic Circuits   |   Electronics Reference Design Library  |   AVR    |    PIC    |    8051    |    Electronic Projects

IC ADC0808

Image: 
ADC0808 Image

Looking for Electronic Components???  Search 2.5m+ Electronics Products Online:

Microcontrollers        Sensors        Multimeters & Voltmeters        Resistors        7 Segment Displays        Motors & Drives        Potentiometers & Trimmers

Relays        Capacitors        Integrated Circuits - ICs        Encoders        Timers         Batteries       and many more

DataSheet: 

ADC0808 is an 8 bit analog to digital converter with eight input analog channels, i.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.

 

Pin Diagram: 
ADC0808 pin diagram, pinout
Pin Description: 


 Pin No
 Function
 Name
1
Analog input pins
IN3
2
IN4
3
IN5
4
IN6
5
IN7
6
Start conversion; input pin; a low to high pulse is given
SC
7
End of conversion; output pin; goes low when the conversion is over
EOC
8
Digital output bit 4
D3
9
Input pin; a low to high pulse brings data to output pins from the internal registers at end of conversion
Output enable
10
Clock input; to provide external clock
Clock input
11
Supply voltage; 5V
Vcc
12
Positive reference voltage
Vref(+)
13
Ground ()v)
GND
14
Digital output bit
D1
15
D2
16
Negative reference voltage
Vref(-)
17
Digital output bits
D0
18
D4
19
D5
20
D6
21
D7
22
Address latch enable; Input pin; low to high pulse is required to latch in the address
ALE
23
Address lines
AddressC
24
AddressB
25
AddressA
 
26
Analog inputs
IN0
27
IN1
28
IN2

 

You are here