AD779 Analog Devices, AD779 Datasheet - Page 4

• Manufacturer Part Number: AD779
• Description: 14-Bit 128 kSPS Complete Sampling ADC
• Manufacturer: Analog Devices

AD779
TIMING SPECIFICATIONS
(All device types T
Parameter
Conversion Rate
Convert Pulse Width
Aperture Delay
Conversion Time
Status Delay
Access Time
Float Delay
Output Delay
OE Delay
Read Pulse Width
Conversion Delay
NOTES
1
2
3
4
5
Specifications subject to change without notice.
Includes Acquisition Time.
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.
C
C
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
OUT
5%, V
= 100 pF.
= 50 pF.
DD
= +5 V
5
2, 3
Figure 1. Conversion Timing
1
MIN
Figure 2. Output Timing
to T
10%)
MAX
Symbol
t
t
t
t
t
t
t
t
t
t
t
CR
CP
AD
C
SD
BA
FD
OD
OE
RP
CD
, V
CC
= +12 V
Min
0.097
5
0
10
10
10
20
100
400
OUT
5%, V
= 10 pF.
EE
Max
7.8
3.0
20
6.3
400
100
57
80
0
= –12 V
4
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
s
s
s
–4–
Figure 4. Load Circuit for Bus Timing Specifications
Figure 3. EOC Timing
REV. B