19-1856; Rev 3; 3/02
KIT
ATION
EVALU
BLE
AVAILA
10.7Gbps Laser Diode Drivers
General Description
Features
o
o
o
o
o
o
o
o
o
o
o
Single +5V or -5.2V Power Supply
108mA Supply Current
Operates to 10.7Gbps
50Ω On-Chip Input Termination Resistors
Programmable Modulation Current to 100mA
Programmable Laser Bias Current to 100mA
25ps Rise Time (MAX3930/MAX3932)
Adjustable Pulse-Width Control
Selectable Data Retiming Latch
ESD Protection
Internal Series Damping Resistor (MAX3931)
MAX3930/MAX3931/MAX3932
†
The MAX3930/MAX3931/MAX3932 are designed for
direct modulation of laser diodes at data rates up to
10.7Gbps. They provide adjustable laser bias and
modulation currents and are implemented using
Maxim’s second-generation in-house SiGe process.
The MAX3930 accepts differential CML clock and data
input signals and includes 50Ω on-chip termination
resistors. It delivers a 1mA to 100mA laser bias current
and a 20mA to 100mA modulation current with a typical
(20% to 80%) 25ps rise time. An input data retiming
latch can be used to reject input pattern-dependent jitter
if a clock signal is available.
The MAX3931/MAX3932 have an alternate pad out with
respect to the MAX3930. The MAX3931 includes the
series damping resistor R
D
on chip.
The MAX3930/MAX3931/MAX3932 also include an
adjustable pulse-width control circuit to minimize laser
pulse-width distortion.
Ordering Information
PART
MAX3930E/D
MAX3931E/D
MAX3932E/D
MAX3932E/W
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
Dice
Dice
Dice
Wafer
________________________Applications
SONET OC-192 and SDH STM-64
Transmission Systems
Up to 10.7Gbps Optical Transmitters
Section Regenerators
Note:
Dice are designed to operate over a -40°C to +120°C
junction temperature (T
J
) range but are tested and guaranteed
at T
A
= +25°C.
Typical Application Circuit
5V
V
BIAS
5V
5V
0.01µF
BIASMON
BIASSET
DATA+
DATA-
50Ω
50Ω
5V
DATA+
DATA-
V
CC
MODN1
MOD1
V
TT
50Ω
50Ω
CLK+
CLK-
PWC+
RTEN
PWC-
MOD2
MODN2
MODMON
MODSET
BIAS
V
EE
MODEN
L
B
20Ω
5V
R
D
= 15Ω
MAX3910
10Gbps CLK+
SERIALIZER
CLK-
MAX3930
5V
5V
2kΩ
REPRESENTS A CONTROLLED–
IMPEDANCE TRANSMISSION LINE
V
MOD
†
C0.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
10.7Gbps Laser Diode Drivers
MAX3930/MAX3931/MAX3932
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (V
CC
- V
EE
) ..................................-0.5V to +6.0V
DATA+, DATA-, CLK+,
CLK- ................................................(V
TT
- 1.2V) to the lower of
(V
TT
+ 1.2V) or (V
CC
+ 0.5V)
MODEN, RTEN,
V
TT
, BIASMON, MODMON,
PWC+, and PWC- .........................(V
EE
- 0.5V) to (V
CC
+ 0.5V)
MODN1, MODN2 ............................(V
CC
- 0.5V) to (V
CC
+ 0.5V)
BIAS, MOD1, MOD2 ...........................(V
EE
+ 1V) to (V
EE
+ 1.5V)
MODSET and BIASSET ....................(V
EE
- 0.5V) to (V
EE
+ 1.5V)
Storage Temperature Range .............................-55°C to +150°C
Operating Junction Temperature ......................-55°C to +150°C
Processing Temperature (die) .........................................+400°C
Current into DATA+, DATA-, CLK+,
CLK- (V
TT
= V
CC
)........................................-24mA to +30.5mA
Current into DATA+, DATA-, CLK+,
CLK- (V
TT
= V
CC
- 1.3V) ................................-24mA to +24mA
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.
DC ELECTRICAL CHARACTERISTICS—MAX3930
(V
CC
- V
EE
= 4.75V to 5.5V, T
A
=
-40°C
to +85°C. Typical values are at V
CC
- V
EE
= 5V, I
BIAS
= 50mA, I
MOD
= 70mA, and T
A
= +25°C,
unless otherwise noted.)
PARAMETER
Power-Supply Voltage
Power-Supply Current
Single-Ended Input Resistance
Bias Current-Setting Range
Bias Current-Setting Error
Bias Sensing Resistor
Bias Current Temperature
Stability
Bias Off-Current
MODEN
and
RTEN
Input High
MODEN
and
RTEN
Input Low
Power-Supply Rejection Ratio
SIGNAL INPUT FOR V
TT
= V
CC
At high
Single-Ended Input
(DC-Coupled)
V
IS
At low
At high
Single-Ended Input
(AC-Coupled)
V
IS
At low
Differential Input Swing
(DC-Coupled)
Differential Input Swing
(AC-Coupled)
V
ID
V
ID
V
CC
- 1
V
CC
+
0.075
V
CC
-
0.4
0.3
0.3
V
CC
V
CC
-
0.15
V
CC
+
0.4
V
V
CC
-
0.075
2.0
1.6
V
P-P
V
P-P
V
V
IH
V
IL
PSRR
V
CC
= 4.75V to 5.5V (Note 2)
39.5
60
R
BIAS
I
BIAS
= 100mA (Note 1)
I
BIAS
= 1mA (Note 1)
BIASSET
≤
(V
EE
+ 0.4V)
V
EE
+
2
V
EE
+
0.8
Bias current = 100mA, T
A
= +25°C
Bias current = 1mA, T
A
= +25°C
SYMBOL
V
CC
- V
EE
I
CC
Excluding bias current and modulation
current
42.5
1
-5
-10
2.7
-480
-200
0.05
3
CONDITIONS
MIN
4.75
TYP
5
108
50
MAX
5.50
140
57.5
100
+5
+10
3.3
+480
UNITS
V
mA
Ω
mA
%
Ω
ppm/°C
mA
V
V
dB
SIGNAL INPUT FOR V
TT
= (V
CC
- 1.3V)
Input Common Mode
V
ICM
V
CC
-
1.3
V
2
_______________________________________________________________________________________
10.7Gbps Laser Diode Drivers
DC ELECTRICAL CHARACTERISTICS—MAX3930 (continued)
(V
CC
- V
EE
= 4.75V to 5.5V, T
A
=
-40°C
to +85°C. Typical values are at V
CC
- V
EE
= 5V, I
BIAS
= 50mA, I
MOD
= 70mA, and T
A
= +25°C,
unless otherwise noted.)
PARAMETER
SYMBOL
At high
Single-Ended Input
V
IS
At low
Differential Input Swing
V
ID
CONDITIONS
MIN
V
CC
-
1.225
V
CC
-
1.8
0.3
TYP
MAX
V
CC
-
0.8
V
V
CC
-
1.375
2.0
V
P-P
UNITS
MAX3930/MAX3931/MAX3932
DC ELECTRICAL CHARACTERISTICS—MAX3931/MAX3932
(V
CC
- V
EE
= 4.75V to 5.5V, T
A
=
-40°C
to +85°C. Typical values are at V
CC
- V
EE
= 5V, I
BIAS
= 50mA, I
MOD
= 70mA, and T
A
= +25°C,
unless otherwise noted.)
PARAMETER
Power-Supply Voltage
Power-Supply Current
Single-Ended Input Resistance
Bias Current Setting Range
Bias Current Setting Error
Bias Sensing Resistor
Bias Current Temperature
Stability
Bias Off-Current
MODEN
and
RTEN
Input High
MODEN
and
RTEN
Input Low
Power-Supply Rejection Ratio
SIGNAL INPUT
At high
Single-Ended Input
(DC-Coupled)
V
IS
At low
At high
Single-Ended Input
(AC-Coupled)
V
IS
At low
Differential Input Swing
(DC-Coupled)
Differential Input Swing
(AC-Coupled)
V
ID
V
ID
V
CC
- 1
V
CC
+
0.075
V
CC
-
0.4
0.3
0.3
V
CC
V
CC
-
0.15
V
CC
+
0.4
V
V
CC
-
0.075
2.0
1.6
V
P-P
V
P-P
V
V
IH
V
IL
PSRR
V
CC
= 4.75V to 5.5V (Note 3)
39.5
60
R
BIAS
I
BIAS
= 100mA (Note 1)
I
BIAS
= 1mA
BIASSET
≤
(V
EE
+ 0.4V)
V
EE
+
2
V
EE
+
0.8
Bias current = 100mA, T
A
= +25°C
Bias current = 1mA, T
A
= +25°C
SYMBOL
V
CC
- V
EE
I
CC
Excluding bias current and modulation
current
42.5
1
-5
-10
2.7
-480
-200
0.05
3
CONDITIONS
MIN
4.75
TYP
5
108
50
MAX
5.50
140
57.5
100
+5
+10
3.3
+480
UNITS
V
mA
Ω
mA
%
Ω
ppm/°C
mA
V
V
dB
_______________________________________________________________________________________
3
10.7Gbps Laser Diode Drivers
MAX3930/MAX3931/MAX3932
AC ELECTRICAL CHARACTERISTICS—MAX3930/MAX3932
(V
CC
- V
EE
= 4.75V to 5.5V, V
TT
= V
CC
, T
A
= -40°C to +85°C. Typical values are at V
CC
- V
EE
= 5V, I
MOD
= 70mA, and T
A
= +25°C,
unless otherwise noted.) (Note 3)
PARAMETER
Input Data Rates
Modulation Current Setting Range
Modulation Current Setting Error
Modulation Sensing Resistor
Modulation Current Temperature
Stability
Modulation Off-Current
Output Current Rise Time
Output Current Fall Time
Setup/Hold Time
Pulse-Width Adjustment Range
Pulse-Width Stability
Pulse-Width Control Input Range
Overshoot
Driver Random Jitter
Driver Deterministic Jitter
Input Return Loss
(Note 5)
t
R
t
F
t
SU
, t
HD
MODSET
≤
(V
EE
+ 0.4V)
Z
L
= 20Ω, 20% to 80% (Note 4)
Z
L
= 20Ω, 20% to 80% (Note 4)
Figure 2
(Note 4)
PWC+ and PWC- open (Note 4)
For PWC+ and PWC
(Note 4)
0.75
6.7
12
V
EE
+
0
V
EE
+
1
25
±25
±55
±13
V
EE
+
2
13
1
21
25
29
R
MOD
20Ω load, T
A
= +25°C
SYMBOL
NRZ
20
-5
2.7
-480
3
CONDITIONS
MIN
TYP
10.7
MAX
100
+5
3.3
+480
0.1
35
36
UNITS
Gbps
mA
%
Ω
ppm/°C
mA
ps
ps
ps
ps
ps
V
%
ps
RMS
ps
P-P
dB
AC ELECTRICAL CHARACTERISTICS—MAX3931
(V
CC
- V
EE
= 4.75V to 5.5V, V
TT
= V
CC
, T
A
= -40°C to +85°C. Typical values are at V
CC
- V
EE
= 5V, I
MOD
= 70mA, and T
A
= +25°C,
unless otherwise noted.) (Note 3)
PARAMETER
Input Data Rates
Modulation Current Setting
Range
Modulation Current Setting Error
Modulation Sensing Resistor
Output Series Resistance
Modulation Current Temperature
Stability
Modulation Off-Current
Setup/Hold Time
Pulse-Width Adjustment Range
Pulse-Width Stability
Pulse-Width Control Input Range
Input Return Loss
t
SU
, t
HD
MODSET
≤
(V
EE
+ 0.4V)
Figure 2
(Note 4)
PWC+ and PWC- open (Note 4)
For PWC+ and PWC-
V
EE
+
0
V
EE
+
1
12
25
±25
±55
13
V
EE
+
2
R
MOD
R
MOD1
in parallel with R
MOD2
20Ω load, T
A
= +25°C
SYMBOL
NRZ
20
-5
2.7
12.75
-480
3
15
CONDITIONS
MIN
TYP
10.7
100
+5
3.3
17.25
+480
0.1
MAX
UNITS
Gbps
mA
%
Ω
Ω
ppm/°C
mA
ps
ps
ps
V
dB
Note 1:
Guaranteed by design and characterization.
Note 2:
PSRR = 20 x log (∆V
CC/
(∆ I
MOD
✕
20Ω)). I
MOD
= 100mA
Note 3:
Guaranteed by design and characterization using the circuit shown in Figure 1.
Note 4:
Measured using a 10.7Gbps repeating 0000 0000 1111 1111 pattern.
Note 5:
Measured using a 10.7Gbps 2
13
- 1 PRBS with eighty 0s pattern.
4
_______________________________________________________________________________________
10.7Gbps Laser Diode Drivers
Typical Operating Characteristics
(V
CC
= 5V, T
A
= +25°C, unless otherwise noted.)
ELECTRICAL EYE DIAGRAM
(I
MOD
= 100mA, 2
13
- 1 + 80 CID)
MAX3930 toc01
MAX3930/MAX3931/MAX3932
MAX3930/MAX3932
ELECTRICAL EYE DIAGRAM
(I
MOD
= 20mA, 2
13
- 1 + 80 CID)
MAX3930 toc02
SUPPLY CURRENT vs. TEMPERATURE
(EXCLUDES BIAS AND MODULATION CURRENTS)
112
111
SUPPLY CURRENT (mA)
110
109
108
107
106
105
104
103
MAX3930 toc03
113
14ps/div
14ps/div
-40
-15
10
35
60
85
PULSE-WIDTH DISTORTION
vs. TEMPERATURE
MAX3930 toc04
TEMPERATURE (°C)
TYPICAL DISTRIBUTION OF RISE TIME
MAX3930 toc05
TYPICAL DISTRIBUTION OF FALL TIME
MAX3930 toc06
2.0
1.8
PULSE-WIDTH DISTORTION (ps)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
-40
-15
10
35
60
I
MOD
= 100mA
I
MOD
= 20mA
10
10
8
PERCENT OF UNITS (%)
8
PERCENT OF UNITS (%)
6
6
4
4
2
2
0
85
22
23
24
25
26
27
28
29
30
TEMPERATURE (°C)
RISE TIME (ps)
0
25
26
27
28
29
30
31
32
33
FALL TIME (ps)
PULSE WIDTH vs. R
PWC
MAX3930 toc07
MAX3930 toc08
PULSE-WIDTH OF NEGATIVE PULSE (ps)
PULSE-WIDTH OF POSITIVE PULSE (ps)
120
110
100
90
80
70
60
50
40
30
67
77
87
97
90
80
70
I
MOD
(mA)
60
50
40
30
20
10
0
107
117
127
137
147
157
0 200 400 600 800 1000 1200 1400 1600 1800 2000
R
PWC-
(Ω)
OPTICAL EYE DIAGRAM COURTESY
OF NETWORK ELEMENTS, INC.
COPYRIGHT©2000 BY NETWORK
ELEMENTS, INC. ALL RIGHTS RESERVED.
0
0.1
V
MOD
(V)
0.2
0.3
_______________________________________________________________________________________
MAX3930 toc09
R
PWC+
(Ω)
2000 1800 1600 1400 1200 1000 800 600 400 200 0
130
57
OC-192 OPTICAL EYE DIAGRAM
(I
MOD
= 70mA
P-P
,
I
BIAS
= 15mA, P
AVG
= -2dBm)
100
I
MOD
vs. V
MOD
5
Microchip MCU
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