ADC0802 View Datasheet(PDF) - Intersil

Part Name

Description

Manufacturer

ADC0802

8-Bit, Microprocessor Compatible, A/D Converters

Intersil 

Functional Diagram

ADC0802, ADC0803, ADC0804

2

RD

1

CS 3

WR

READ

“1” = RESET SHIFT REGISTER

SET

Q “0” = BUSY AND RESET STATE

RESET

CLK R

19

CLK IN

4

CLK OSC

10

DGND

CLK A

CLK

GEN CLKS

G1 RESET

START F/F

V+ 20

(VREF)

9

VREF/2

LADDER

AND

DECODER

INPUT PROTECTION

FOR ALL LOGIC INPUTS

INPUT

TO INTERNAL

CIRCUITS

BV = 30V

CLK

D

DFF1

Q

CLK B

MSB

D

SUCCESSIVE

APPROX.

REGISTER

AND LATCH

8-BIT

SHIFT

REGISTER

R

RESET

START

CONVERSION

IF RESET = “0”

INTR F/F

AGND 8

6

VIN (+)

7

VIN (-)

DAC

VOUT

V+

+

∑

-

LSB

Q

COMP

-

+

CLK A

D

DFF2

Q

THREE-STATE

OUTPUT LATCHES

XFER

G2

MSB

LSB

11 12 13 14 15 16 17 18

DIGITAL OUTPUTS

THREE-STATE CONTROL

“1” = OUTPUT ENABLE

SET

CONV. COMPL.

8 X 1/f

Q

5

INTR

6-6

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