AD6645 Analog Devices, AD6645 Datasheet - Page 6

• Manufacturer Part Number: AD6645
• Description: 14-Bit, 80 MSPS/105 MSPS A/D Converter
• Manufacturer: Analog Devices

Specifications of AD6645

• Resolution (bits): 14bit
• # Chan: 1
• Sample Rate: 105MSPS
• Interface: Par
• Analog Input Type: Diff-Uni
• Ain Range: 2.2 V p-p
• Adc Architecture: Pipelined
• Pkg Type: QFP

AD6645
Parameter
DATA-READY (DRY
APERTURE DELAY
APERTURE UNCERTAINTY (JITTER)
1
2
3
4
5
Several timing parameters are a function of t
Several timing parameters are a function of t
ENCODE TO DATA Delay (Hold Time) is the absolute minimum propagation delay through the ADC, t
DRY is an inverted and delayed version of the encode clock. Any change in the duty cycle of the clock will correspondingly change the duty cycle of DRY.
Data-ready to DATA Delay (t
Data-Ready to DATA Delay (Hold Time)
Data-Ready to DATA Delay (Setup Time)
50% Duty Cycle
50% Duty Cycle
4
)/DATA(D13:0),, OVR
H_DR
and t
D[13:0], OVR
S_DR
ENCODE,
ENCODE
) is calculated relative to rated speed grade and is dependent on t
DRY
AIN
t
ENC
ENCL
E_RL
and t
and t
t
A
Symbol
t
t
t
t
H_DR
S_DR
A
J
N
ENCH
N
ENCH
t
.
.
ENC
t
E_FL
N – 3
Temp
Full
Full
Full
Full
25°C
25°C
t
N + 1
ENCH
N + 1
Figure 2. Timing Diagram
Rev. D | Page 6 of 24
Test
Level
V
V
V
V
V
V
t
ENCL
N – 2
t
DR
N + 2
Min
6.6
2.1
N + 2
t
E_DR
t
S_DR
AD6645ASQ-80/
AD6645ASV-80
N – 1
Typ
Note 5
7.2
Note 5
3.6
−500
0.1
t
H_DR
E_RL
N + 3
N + 3
t
S_E
= t
5
5
ENC
H_E
and duty cycle.
.
Max
7.9
5.1
N
N + 4
N + 4
Min
5.1
0.6
0.1
t
H_E
AD6645ASQ-105/
AD6645ASV-105
Typ
Note 5
5.7
Note 5
2.1
−500
5
5
Max
6.4
3.5
Unit
ns
ns
ps
ps rms