adc0803-1lcd NXP Semiconductors, adc0803-1lcd Datasheet - Page 10

• Manufacturer Part Number: adc0803-1lcd
• Description: Cmos 8-bit A/d Converters
• Manufacturer: NXP Semiconductors

Philips Semiconductors
3-STATE TEST CIRCUITS AND WAVEFORMS (ADC0801-1)
TIMING DIAGRAMS
2002 Oct 17
NOTE:
Read strobe must occur 8 clock periods (8/f
CMOS 8-bit A/D converters
RD
CS
V
ACTUAL INTERNAL
CC
10 pF
STATUS OF THE
t
1H
C
CONVERSION
L
CONVERTER
START
INTR
WR
CS
(All timing is measured from the 50% voltage points)
10 k
(LAST DATA WAS READ)
(LAST DATA WAS NOT READ)
DATA
OUTPUT
OUTPUTS
CLK
) after assertion of interrupt to guarantee reset of INTR.
DATA
INTR
Figure 4. 3-State Test Circuits and Waveforms (ADC0801-1)
OUTPUT
CS
RD
DATA
RD
t
WI
V
GND
V
GND
CC
OH
Output Enable and Reset INTR
t
INTR RESET
W(WR)L
20ns
Figure 5. Timing Diagrams
t
r
10%
50%
90%
NOTE
90%
t
1H
t
t
ACC
RI
1 TO 8 X 1/f
10
RD
”NOT BUSY”
CS
CLK
V
CC
t
OH
C
t
1H,
L
V
CC
t
THREE–STATE
0H
10 k
”BUSY”
10 pF
DATA
OUTPUT
INTERNAL T
C
OUTPUT
DATA
ADC0803/0804
RD
DATA IS VALID IN
OUTPUT LATCHES
V
GND
V
GND
CC
OH
INT ASSERTED
1/2 T
CLK
SL00020
t
r
10%
50%
90%
Product data
SL00019
10%
t
0H