MAX3747A/MAX3747B
155Mbps to 3.2Gbps, Low-Power SFP
Limiting Amplifiers
ELECTRICAL CHARACTERISTICS (continued)
(V
= +2.97V to +3.63V, CML output load is 50Ω to V , T = -40°C to +85°C. Typical values are at V
= +3.3V and T = +25°C,
CC A
CC
CC
A
unless otherwise specified.) (Note 1)
PARAMETER
Input-Referred Noise
Low-Frequency Cutoff
LOS Hysteresis
SYMBOL
CONDITIONS
(Note 4)
MIN
TYP
120
6.4
MAX
150
UNITS
µV
V
= 4mV
IN
P-P
RMS
kHz
10log(V
/ V
) (Note 4)
ASSERT
1.25
2.3
dB
DEASSERT
MAX3747A (Notes 4, 8)
LOS Assert/Deassert Time
40.0
µs
MAX3747B (Notes 4, 8, 9)
Low LOS Assert Level
Low LOS Deassert Level
Medium LOS Assert Level
Medium LOS Deassert Level
High LOS Assert Level
High LOS Deassert Level
TTL/CMOS I/O
V
V
V
V
V
V
= -1.3V (Notes 4, 10)
= -1.3V (Notes 4, 10)
= -0.68V (Notes 4, 10)
= -0.68V (Notes 4, 10)
= -0.114V (Notes 4, 10)
= -0.114V (Notes 4, 10)
2.5
4.1
6.2
5.9
9.3
mV
TH
TH
TH
TH
TH
TH
P-P
P-P
P-P
P-P
P-P
P-P
mV
mV
mV
mV
mV
22.0
36.0
29.0
44.8
53.7
86.0
36.0
62.0
63.6
115
V
-
V
-
V
-
CC
CC
CC
V
Voltage
V
V
REF
REF
1.35
1.3V
1.19
LOS Output High Voltage
LOS Output Low Voltage
DISABLE Input High
V
R
R
= 4.7kΩ to 10kΩ to V
= 4.7kΩ to 10kΩ to V
(3V)
2.4
2.0
V
V
OH
LOS
CC_HOST
V
(3.6V)
0.4
OL
LOS
CC_HOST
V
V
IH
DISABLE Input Low
V
0.8
10
V
IL
DISABLE Input Current
R
LOS
= 4.7kΩ to 10kΩ to V
µA
CC_HOST
Note 1: The data-input transition time is controlled by a 4th-order Bessel filter with f
= 0.75 x 2.667GHz for all data rates of
-3dB
2.667Gbps and below. The f
= 0.75 x 3.2GHz for a data rate of 3.2Gbps.
-3db
Note 2: Supply current is measured with unterminated outputs or with AC-coupled output termination (see Figure 1).
Note 3: Between sensitivity and overload, all AC specifications are met and the output is 0.95 x limited output amplitude.
Note 4: Guaranteed by design and characterization.
Note 5: The deterministic jitter (DJ) caused by the input filter is not included in the DJ generation specification.
23
Note 6: The PRBS 2 - 1 equivalent pattern consists of a K28.5 pattern plus 240 ones plus K28.5 pattern plus 240 zeros.
Note 7: Random jitter was measured without using a filter at the input.
Note 8: The signal at the input is switched between two amplitudes, Signal_ON and Signal_OFF, as shown in Figure 2A.
Note 9: The signal at the input is switched between 1.2V
and Signal_OFF as shown in Figure 2B.
P-P
Note 10: V is the voltage at pin 5 referenced to V
(see Figure 5).
TH
CC
Maxim Integrated
3