
ADCLK854
Rev. 0 | Page 3 of 16
SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
Typical (Typ) values are given for VS = 1.8 V and TA = 25°C, unless otherwise noted. Minimum (Min) and maximum (Max) values are given over
the full VS = 1.8 V ± 5% and TA = 40°C to +85°C variation, unless otherwise noted. Input slew rate > 1 V/ns, unless otherwise noted.
Table 1. Clock Inputs and Outputs
Parameter
Symbol
Min
Typ
Max
Unit
Conditions
CLOCK INPUTS
Differential input
Input Frequency
0
1200
MHz
Input Sensitivity, Differential
150
mV p-p
Jitter performance improves with higher slew
rates (greater voltage swing)
Input Level
1.8
V p-p
Larger voltage swings can turn on the protection
diodes and degrade jitter performance
Input Common-Mode Voltage
VCM
VS/2 0.1
VS/2 + 0.5
V
Inputs are self-biased; enables ac coupling
Input Common-Mode Range
VCMR
0.4
VS 0.4
V
Inputs dc-coupled with 200 mV p-p signal applied
Input Voltage Offset
30
mV
Input Sensitivity, Single-Ended
150
mV p-p
CLKx ac-coupled; CLKx ac bypassed to ground
Input Resistance (Differential)
7
kΩ
Input Capacitance
CIN
2
pF
Input Bias Current (Each Pin)
350
+350
μA
Full input swing
LVDS CLOCK OUTPUTS
Termination = 100 Ω; differential (OUTx, OUTx)
Output Frequency
1200
MHz
Output Voltage Differential
VOD
247
344
454
mV
Delta VOD
ΔVOD
50
mV
Offset Voltage
VOS
1.125
1.25
1.375
V
Delta VOS
ΔVOS
50
mV
Short-Circuit Current
ISA, ISB
3
6
mA
Each pin (output shorted to GND)
CMOS CLOCK OUTPUTS
Single-ended; termination = open; OUTx and
OUTx in phase
Output Frequency
250
MHz
With 10 pF load per output; see Figure 16 for
swing vs. frequency
Output Voltage High
VOH
VS 0.1
V
@ 1 mA load
Output Voltage Low
VOL
0.1
V
@ 1 mA load
Output Voltage High
VOH
VS 0.35
V
@ 10 mA load
Output Voltage Low
VOL
0.35
V
@ 10 mA load
Reference Voltage
VREF
Output Voltage
VS/2 0.1
VS/2
VS/2 + 0.1
V
±500 μA
Output Resistance
60
Ω
Output Current
500
μA