Datasheet

AD779
–4–
REV. B
TIMING SPECIFICATIONS
(All device types T
MIN
to T
MAX
, V
CC
= +12 V 6 5%, V
EE
= –12 V
6 5%, V
DD
= +5 V 6 10%)
Parameter Symbol Min Max Units
Conversion Rate
1
t
CR
7.8 µs
Convert Pulse Width t
CP
0.097 3.0 µs
Aperture Delay t
AD
520ns
Conversion Time t
C
6.3 µs
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
OE Delay t
OE
20 ns
Read Pulse Width t
RP
100 ns
Conversion Delay t
CD
400 ns
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 4.
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 4; C
OUT
= 10 pF.
Specifications subject to change without notice.
Figure 1. Conversion Timing
Figure 2. Output Timing
Figure 3. EOC Timing
Figure 4. Load Circuit for Bus Timing Specifications