ADC0803, ADC0805

8-BIT ANALOG-TO-DIGITAL CONVERTERS

WITH DIFFERENTIAL INPUTS

SLAS034 – NOVEMBER 1983 – REVISED SEPTEMBER 1986

2

POST OFFICE BOX 655303

functional block diagram (positive logic)

Clk Osc

Clk

Gen

Comp

D

VCC

DAC

LE

8-Bit

Shift

Register

SAR

Latch

Ladder

and

Decoder

7

IN –

6

IN +

8

ANLG

GND

9

REF/2

20

VCC

10

DGTL

GND

4

CLK IN

19

CLK

OUT

WR

RD

CS

INTR

5

Interrupt

Flip-Flop

R

3-State

Output

Latch

EN

LE

DB7 (MSB)

11

DB6

12

DB5

13

DB4

14

DB3

15

DB2

16

DB1

17

DB0 (LSB)

18

R

R

S

1D

C1

CLK A

CLK B

CLK B

CLK

CLK A

Start

Flip-Flop

CLK A

3

1

2

CLK

1D

C1

R

S

Σ