Datasheet
MAX3676
622Mbps, 3.3V Clock-Recovery and
Data-Retiming IC with Limiting Amplifier
_______________________________________________________________________________________ 3
AC ELECTRICAL CHARACTERISTICS
(V
CC
= +3.0V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= +3.3V and T
A
= +25°C.)
(Notes 2, 3)
Note 2: AC parameters are guaranteed by design and characterization.
Note 3: The MAX3676 is characterized with a PRBS of 2
23
- 1 maintaining a BER of ≤ 10
-10
having a confidence level of 99.9%.
Note 4: A lower minimum input voltage of 2mV
P-P
is achievable; however, the LOP hysteresis is not guaranteed below 3.6mV
P-P
.
Note 5: Hysteresis = 20log(V
RELEASE
/V
ASSERT
).
Note 6: R
1
= 20kΩ, R
2 =
3.0kΩ, resulting in V
RELEASE
≈ 3.6mV
P-P
.
Note 7: Small-signal bandwidth cannot be measured directly.
Note 8: RSSI slope = [V
RSSI2
- V
RSSI1
]/[20log (V
ID2
/V
ID1
)].
Note 9: 1UI = 1 unit interval = (622.08MHz)
-1
= 1.608ns.
Note 10: At jitter frequencies <10kHz, the jitter tolerance characteristics exceed the ITU/Bellcore specifications. The low-frequency
jitter tolerance outperforms the instrument’s measurement capability.
Note 11: See
Typical Operating Characteristics
for worst-case distribution.
PARAMETER SYMBOL MIN TYP MAX UNITS
RSSI Output Voltage
1.40
Limiting Amplifier Small-
Signal Bandwidth
BW
650
MHz
Power-Detect Hysteresis
36
dB
Input-Referred Noise V
N
80
μV
RMS
Threshold Voltage V
TH
1.41
V
Differential Input Voltage
Range
V
ID
0.003 1.2000
V
P-P
CONDITIONS
(ADI+) - (ADI-) = 2mV
P-P
(Note 7)
(Notes 5, 6)
ADI inputs
(Note 6)
BER < 10
-10
, ADI inputs (Note 4)
1.93
V
(ADI+) - (ADI-) = 20mV
P-P
Jitter-Transfer Peaking
0.03 0.08
dB
Maximum Consecutive Input
Run Length (1 or 0)
1200
Bits
C
F
= 2.2μF
8.9
C
F
= 2.2μF
(Note 11) 3.64
Jitter Tolerance (Note 10)
0.55 0.77
0.45 0.69
C
F
= 2.2μFLoop Bandwidth
250 500
kHz
26
RSSI Linearity
±0.7
%(ADI+) - (ADI-) = 2mV
P-P
to 50mV
P-P
RSSI Slope mV/dB
(ADI+) - (ADI-) = 2mV
P-P
to 50mV
P-P
(Note 8)
UI
f = 10kHz
f = 25kHz
f = 250kHz
f = 1MHz
C
F
= 2.2μFJitter Generation (Note 9)
2.0 2.6
mUI
LOP Threshold Accuracy
-2 +2
dB(Note 6)
Clock Transition Time tr, tf
205 245
ps20% to 80%
Data Transition Time tr, tf
180 230
ps20% to 80%
Serial Clock-to-Q Delay t
CLK-Q
140 275 400
ps
Serial Clock Frequency f
SCLK
622.08
MHz