Electrical characteristics (continued) – Rainbow Electronics MAX3798 User Manual
Page 4
MAX3798
1.0625Gbps to 10.32Gbps, Integrated, Low-
Power SFP+ Limiting Amplifier and VCSEL Driver
4
_______________________________________________________________________________________
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 100
Ω, C
AZ
= 1nF, transmitter out-
put load is AC-coupled to differential 100
Ω (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 MODE_SEL bit was used and the MSEL pin was left open.)
PARAMETER SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
LOS Assert/Deassert Time
(Note 7)
2.3
80
μs
Low Assert 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
Tx INPUT SPECIFICATIONS
Data rate = 1.0625Gbps to 4.25Gbps
0.2
2.4
Differential Input Voltage
V
IN
Data rate = 4.25Gbps to 10.32Gbps
0.075
0.8
V
P-P
Common-Mode Input Voltage
V
INCM
2.75
V
Differential Input Resistance
R
IN
75
100 125
DUT is powered on, f
5GHz
15
Input Return Loss
SDD11
DUT is powered on, f
16GHz
6
dB
DUT is powered on, 1GHz < f
5GHz
9
Input Return Loss
SCC11
DUT is powered on, 1GHz < f
16GHz
5
dB
Tx LASER MODULATOR
Maximum Modulation-On
Current into 100
Differential
Load
I
MODMAX
Outputs
AC-coupled,
V
CCTO
2.95V
12 mA
Minimum Modulation-On Current
into 100
Differential Load
I
MODMIN
Outputs
AC-coupled
2
mA
Modulation Current DAC
Stability
2mA
I
MOD
12mA (Note 8)
4
%
Modulation Current Rise Time/
Fall Time
t
R
/t
F
5mA
I
MOD
10mA, 20% to 80%,
SET_TXDE[3:0] = 10 (Notes 2, 4)
26
39 ps
5mA
I
MOD
12mA, at 10.32Gbps,
250mV
P-P
V
IN
800mV
P-P
,
SET_TXDE[4:1] = 0
6
12
5mA
I
MOD
12mA, at 10.32Gbps,
250mV
P-P
V
IN
800mV
P-P
,
SET_TXDE[4:1] = 10
6
13
5mA
I
MOD
12mA, at 8.5Gbps,
250mV
P-P
V
IN
800mV
P-P
,
SET_TXDE[4:1] = 0
6
12
5mA
I
MOD
12mA, at 8.5Gbps,
250mV
P-P
V
IN
800mV
P-P
,
SET_TXDE[4:1] = 10
6
12
2mA
I
MOD
12mA, at 4.25Gbps
5
Deterministic Jitter (Notes 2, 9)
DJ
2mA
I
MOD
12mA, at 1.0625Gbps
5
ps