Datasheet

AD678
REV. C
–4–
TIMING SPECIFICATIONS
Parameter Symbol Min Max Units
SC Delay t
SC
50 ns
Conversion Time t
C
3.0 4.4 µs
Conversion Rate
l
t
CR
5 µs
Convert Pulsewidth t
CP
97 ns
Aperture Delay t
AD
520ns
Status Delay t
SD
0 400 ns
Access Time
2, 3
t
BA
10 100 ns
10 57
4
ns
Float Delay
5
t
FD
10 80 ns
Output Delay t
OD
0ns
Format Setup t
FS
47 ns
OE Delay t
OE
0ns
Read Pulsewidth t
RP
97 ns
Conversion Delay t
CD
150 ns
EOCEN Delay t
EO
0ns
NOTES
1
Includes acquisition time.
2
Measured from the falling edge of OE/EOCEN (0.8 V) to the time at which the data lines/EOC cross 2.0 V or 0.8 V. See Figure 3.
3
C
OUT
= 100 pF.
4
C
OUT
= 50 pF.
5
Measured from the rising edge of OE/EOCEN (2.0 V) to the time at which the output voltage changes by 0.5 V. See Figure 3; C
OUT
= 10 pF.
Specifications subject to change without notice.
(All grades, T
MIN
to T
MAX
, V
CC
= +12 V ⴞ 5%, V
EE
= –12 V ⴞ 5%, V
DD
= +5 V ⴞ 10% unless
otherwise noted)
Figure 1. Conversion Timing
Figure 2. EOC Timing
Figure 3. Load Circuit for Bus Timing Specifications