MAX3799
1Gbps to 14Gbps, SFP+ Multirate Limiting
Amplifier and VCSEL Driver
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= 2.85V to 3.63V, T
A
= -40°C to +85°C, CML receiver output load is AC-coupled to differential 100Ω, C
AZ
= 1nF, transmitter out-
put load is AC-coupled to differential 100Ω (see Figure 1), typical values are at +25°C, V
CC
= 3.3V, I
BIAS
= 6mA, I
MOD
= 6mA, unless
otherwise specified. Registers are set to default values unless otherwise noted, and the 3-wire interface is static during measure-
ments. For testing, the RATE_SEL bit was used and the RSEL pin was left open.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DUT is powered on, f 5GHz 11
Output Return Loss SDD22
DUT is powered on, f 16GHz 5
dB
DUT is powered on, 1GHz < f 5GHz 9
Output Return Loss SCC22
DUT is powered on, 1GHz < f 16GHz 7
dB
CML Differential Output Voltage
High
5mV
P-P
V
IN
1200mV
P-P
, SET_CML[162] 595 800 1005 mV
P-P
CML Differential Output Voltage
Medium
10mV
P-P
V
IN
1200mV
P-P
, SET_CML[80] 300 400 515 mV
P-P
CML Differential Output DAC
Limit
SET_CML[7:0] 215
Differential Output Signal When
Disabled
Outputs AC-coupled, V
INMAX
applied to
input V
DIFF_ROUT
= 800mV
P-P
at 8.5Gbps
(Notes 2, 3)
6 15 mV
P-P
10mV
P-P
V
IN
1200mV
P-P
,
RATE_SEL = 1, V
DIFF_ROUT
= 400mV
P-P
26 35
Data Output Transition Time
(20% to 80%)
(Notes 2, 3, 4)
t
R
/t
F
5mV
P-P
V
IN
1200mV
P-P
,
RATE_SEL = 0, V
DIFF_ROUT
= 800mV
P-P
60 100
ps
Rx TRANSFER CHARACTERISTICS
60mV
P-P
V
IN
400mV
P-P
at 10.32Gbps,
RATE_SEL = 1, V
DIFF_ROUT
= 400mV
P-P
4 12
10mV
P-P
V
IN
1200mV
P-P
at 8.5Gbps,
RATE _SEL = 1, V
DIFF_ROUT
= 400mV
P-P
4 12
Deterministic Jitter
(Notes 2, 3, 5)
DJ
5mV
P-P
V
IN
1200mV
P-P
at 1.25Gbps,
RATE _SEL = 0, V
DIFF_ROUT
= 800mV
P-P
20
ps
P-P
Input = 60mV
P-P
at 1.25Gbps
,
RATE_SEL = 0, V
DIFF_ROUT
= 800mV
P-P
1.8 2.5
Random Jitter (Notes 2, 3) RJ
Input = 60mV
P-P
at 8.5Gbps
,
RATE _SEL = 1, V
DIFF_ROUT
= 400mV
P-P
0.32 0.48
ps
RMS
C
AZ
= 0.1μF 2
Low-Frequency Cutoff
C
AZ
= open 500
kHz
Rx LOS SPECIFICATIONS
LOS Assert Sensitivity Range 14 77 mV
P-P
LOS Hysteresis 10 x log(V
DEASSERT
/V
ASSERT
) (Note 6) 1.25 2.1 dB
LOS Assert/Deassert Time (Note 7) 2.3 80 μs
Low As sert Level SET_LOS[7] (Notes 2, 6) 8 11 14 mV
P-P
Low Deassert Level SET_LOS[7] (Notes 2, 6) 14 18 21 mV
P-P
Medium Assert Level SET_LOS[32] (Notes 2, 6) 39 48 58 mV
P-P
Medium Deassert Level SET_LOS[32] (Notes 2, 6) 65 81 95 mV
P-P
High Assert Level SET_LOS[63] (Notes 2, 6) 77 94 112 mV
P-P
High Deassert Level SET_LOS[63] (Notes 2, 6) 127 158 182 mV
P-P
(25 stránky)
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