AD9520 Analog Devices, Inc., AD9520 Datasheet - Page 8

• Manufacturer Part Number: AD9520
• Description: 12 Lvpecl/24 Cmos Output Clock Generator
• Manufacturer: Analog Devices, Inc.

AD9520-5
TIMING CHARACTERISTICS
Table 5.
Parameter
LVPECL OUTPUT RISE/FALL TIMES
PROPAGATION DELAY, t
OUTPUT SKEW, LVPECL OUTPUTS
CMOS OUTPUT RISE/FALL TIMES
PROPAGATION DELAY, t
OUTPUT SKEW, CMOS OUTPUTS
OUTPUT SKEW, LVPECL-TO-CMOS OUTPUT
1
The output skew is the difference between any two similar delay paths while operating at the same voltage and temperature.
Output Rise Time, t
Output Fall Time, t
For All Divide Values
Variation with Temperature
LVPECL Outputs That Share the Same Divider
LVPECL Outputs on Different Dividers
All LVPECL Outputs Across Multiple Parts
CMOS Outputs That Share the Same Divider
All CMOS Outputs on Different Dividers
Outputs That Share the Same Divider
Outputs That Are on Different Dividers
All CMOS Outputs Across Multiple Parts
Output Rise Time, t
Output Fall Time, t
Output Rise Time, t
Output Fall Time, t
For All Divide Values
Variation with Temperature
FP
RP
FC
FC
RC
RC
PECL
CMOS
, CLK-TO-LVPECL OUTPUT
, CLK-TO-CMOS OUTPUT
1
1
1
Min
800
2.1
1.18
1.20
850
Rev. 0 | Page 8 of 80
Typ
130
130
1050
970
5
5
5
5
750
715
965
890
2.75
3.35
2
7
10
10
10
1.76
1.78
1.0
Max
170
170
1280
1180
16
20
45
60
190
960
890
1280
1100
3.55
85
105
240
285
600
620
2.48
2.50
Unit
ps
ps
ps
ps
ps/°C
ps
ps
ps
ps
ps
ps
ps
ps
ps
ns
ns
ps/°C
ps
ps
ps
ps
ps
ps
ns
ns
Test Conditions/Comments
Termination = 50 Ω to VS_DRV − 2 V
20% to 80%, measured differentially (rise/fall
times are independent of VS and are valid for
VS_DRV = 3.3 V and 2.5 V)
80% to 20%, measured differentially (rise/fall
times are independent of VS and are valid for
VS_DRV = 3.3 V and 2.5 V)
High frequency clock distribution configuration
Clock distribution configuration
Termination = 50 Ω to VS_DRV − 2 V
VS_DRV = 3.3 V
VS_DRV = 2.5 V
VS_DRV = 3.3 V
VS_DRV = 2.5 V
VS_DRV = 3.3 V and 2.5 V
Termination = open
20% to 80%; C
80% to 20%; C
20% to 80%; C
80% to 20%; C
Clock distribution configuration
VS_DRV = 3.3 V
VS_DRV = 2.5 V
VS_DRV = 3.3 V and 2.5 V
VS_DRV = 3.3 V
VS_DRV = 2.5 V
VS_DRV = 3.3 V
VS_DRV = 2.5 V
VS_DRV = 3.3 V
VS_DRV = 2.5 V
All settings identical; different logic type
LVPECL to CMOS on same part
LVPECL to CMOS on same part
LOAD
LOAD
LOAD
LOAD
= 10 pF; VS_DRV = 3.3 V
= 10 pF; VS_DRV = 3.3 V
= 10 pF; VS_DRV = 2.5 V
= 10 pF; VS_DRV = 2.5 V