ADC0803 Просмотр технического описания (PDF) - Renesas Electronics

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производитель

ADC0803

8-Bit, Microprocessor-Compatible, A/D Converters

Renesas Electronics 

ADC0803, ADC0804

Functional Diagram

2

RD

CS

WR

1

3

READ

“1” = RESET SHIFT REGISTER

SET

Q “0” = BUSY AND RESET STATE

RESET

CLK R

19

CLK IN

4

10

DGND

CLK OSC

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 (+)

VIN (-) 7

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

FN3094 Rev 4.00

August 2002

Page 2 of 17

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