Rainbow Electronics MAX3738 User Manual
Page 2
MAX3738
1Gbps to 2.7Gbps SFF/SFP Laser Driver with
Extinction Ratio Control
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
CC
= +2.97V to +3.63V, T
A
= -40°C to +85°C. Typical values are at V
CC
= +3.3V, I
BIAS
= 60mA, I
MOD
= 60mA, T
A
= +25°C, unless
otherwise noted.) (Notes 1, 2)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Supply Voltage V
CC
...............................................-0.5V to +6.0V
IN+, IN-, TX_DISABLE, TX_FAULT, SHUTDOWN,
BC_MON, PC_MON, APCFILT1, APCFILT2,
MD, TH_TEMP, MODTCOMP, MODBCOMP,
MODSET, and APCSET Voltage.............-0.5V to (V
CC
+ 0.5V)
OUT+, OUT-, BIAS Current.............................-20mA to +150mA
Continuous Power Dissipation (T
A
= +85°C)
24-Pin TQFN (derate 20.8mW/°C above +85°C) .......1805mW
Operating Junction Temperature Range ...........-55°C to +150°C
Storage Temperature Range .............................-55°C to +150°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
POWER SUPPLY
Supply Current
I
CC
(Note 3)
47
60
mA
Power-Supply Noise Rejection
PSNR
f
≤
1MHz, 100mA
P-P
(Note 4)
33
dB
I/O SPECIFICATIONS
Differential Input Swing
V
ID
DC-coupled, Figure 1
0.2
2.4
V
P-P
Common-Mode Input
V
CM
1.7
V
CC
-
V
ID
/ 4
V
LASER BIAS
Bias-Current-Setting Range
1
100
mA
Bias Off Current
TX_DISABLE = high
0.1
mA
Bias-Current Monitor Ratio
I
BIAS
/ I
BC_MON
68
79
95
mA/mA
LASER MODULATION
Modulation Current-Setting
Range
I
MOD
(Note 5)
5
85
mA
Output Edge Speed
20% to 80%
(Notes 6, 7)
5mA
≤
I
MOD
≤
85mA
65
80
ps
Output Overshoot/Undershoot
With 1pF between OUT+ and OUT-
±
6
%
Random Jitter
(Notes 6, 7)
0.62
1.3
ps
RMS
2.7Gbps, 5mA
≤
I
MOD
≤
85mA
18
40
Deterministic Jitter (Notes 6, 8)
1.25Gbps, 5mA
≤
I
MOD
≤
85mA
20
41
ps
P-P
5mA
≤
I
MOD
≤
10mA
±
175
±
600
Modulation-Current Temperature
Stability
(Note 6)
10mA
≤
I
MOD
≤
85mA
±
125
±
480
ppm/
°
C
5mA
≤
I
MOD
≤
10mA
±
20
Modulation-Current-Setting Error
15
Ω
load,
T
A
= +25
°
C
10mA < I
MOD
≤
85mA
±
15
%
Modulation Off Current
TX_DISABLE = high
0.1
mA
AUTOMATIC POWER AND EXTINCTION RATIO CONTROLS
Monitor-Diode Input Current
Range
I
MD
Average current into the MD pin
18
1500
µA
MD Pin Voltage
1.4
V
MD Current Monitor Ratio
I
MD
/ I
PC_MON
0.85
0.93
1.15
mA/mA