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MAX3663ETG+T

P1-P3P4-P6P7-P9P10-P12P13-P13
General Description
The MAX3663 is a complete, +3.3V laser driver with auto-
matic power-control (APC) circuitry for SDH/SONET appli-
cations up to 622Mbps. It accepts differential PECL
inputs, provides bias and modulation currents, and oper-
ates over a -40°C to +85°C temperature range.
An APC feedback loop is incorporated to maintain a
constant average optical power over temperature and
lifetime. The wide modulation current range from 5mA to
75mA and bias current of 1mA to 80mA are easy to
program, making this product ideal for use in various
SDH/SONET applications. Two pins are provided to
monitor the current levels in the laser: BIASMON with
current proportional to laser bias current, and MODMON
with current proportional to laser modulation.
The MAX3663 also provides enable control and a failure-
monitor output to indicate when the APC loop is unable
to maintain the average optical power. The MAX3663
is available in a compact 4mm x 4mm 24-pin thin QFN
package.
Applications
622Mbps SDH/SONET Access Nodes
Laser Driver Transmitters
Section Regenerators
FTTH/FTTC Applications
Features
♦ +3.3V or +5.0V Single-Supply Operation
♦ 40mA Supply Current at +3.3V
♦ Programmable Bias Current from 1mA to 80mA
♦ Programmable Modulation Current from
5mA to 75mA
♦ Bias Current and Modulation Current Monitors
♦ 200ps Rise/Fall Time
♦ Automatic Average Power Control with Failure
Monitor
♦ Complies with ANSI, ITU, and Bellcore
SONET/SDH Specifications
♦ Enable Control
MAX3663
+3.3V, 622Mbps SDH/SONET
Laser Driver with Current Monitors and APC
________________________________________________________________ Maxim Integrated Products 1
DATA+
BIASMAX
MODSET
APCSET
CAPC
FAIL
ENABLE
GND
MD
BIAS
BIASMON
MODMON
OUT+
0.1µF
LASER
OUT-
C
MD
100pF
R
FILT
20Ω
C
FILT
5pF
C
D
1µF
R+
20Ω
R-
6.3Ω
R
D
5Ω
FERRITE
BEAD
V
CC
DATA-
PECL
+3.3V
+3.3V
+3.3V
84.5Ω
84.5Ω
124Ω
124Ω
4:1
SERIALIZER
WITH
CLOCK GEN
MAX3693
MAX3663
Typical Application Circuit
19-2580; Rev 2; 5/04
EVALUATION KIT
AVAILABLE
Ordering Information
Pin Configuration appears at end of data sheet.
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.
PART
TEMP RANGE
PIN-PACKAGE
MAX3663ETG
-40°C to +85°C 24 Thin QFN (4mm x 4mm)
MAX3663ETG+
-40°C to +85°C 24 Thin QFN (4mm x 4mm)
+Denotes lead-free package.
MAX3663
+3.3V, 622Mbps SDH/SONET
Laser Driver with Current Monitors and APC
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(V
CC
= +3.14V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= +3.3V, T
A
= +25°C.)
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 +7.0V
Current into BIAS ............................................-20mA to +150mA
Current into OUT+, OUT- ............................... -20mA to +100mA
Current into MD....................................................-5mA to +5mA
Voltage at DATA+, DATA-,
ENABLE,
FAIL, BIASMON, MODMON..................-0.5V to (V
CC
+ 0.5V)
Voltage at OUT+, OUT-.............................+1.5V to (V
CC
+ 1.5V)
Voltage at MODSET, APCSET, BIASMAX,
CAPC............................................................... -0.5V to +3.0V
Voltage at BIAS .........................................+1.0V to (V
CC
+ 0.5V)
Continuous Power Dissipation (T
A
= +85°C)
24-Lead Thin QFN
(derate 20.8mW/°C above +85°C)........................1354mW
Operating Junction Temperature Range...........-55°C to +150°C
Processing Temperature (Die).........................................+400°C
Storage Temperature Range ............................ -65°C to +165°C
Lead Temperature (soldering, 10s) .................................+300°C
MODMON to I
MOD
Gain A
MOD
29 mA/mAI
MOD
/I
MODMON
BIASMON to I
BIAS
Gain A
BIAS
38 mA/mAI
BIAS
/I
BIASMON
35I
MD
= 18µA (Note 4)
I
MD
= 1mA
815I
BIAS
= 1mA
I
BIAS
= 80mA
PARAMETER SYMBOL MIN TYP MAX UNITS
Common-Mode Input Voltage V
ICM
V
CC
-V
CC
-V
CC
-
1.49 1.32 V
ID
/4
V
Differential Input Voltage V
ID
200 1600 mV
P-P
Bias Current Absolute Accuracy -15 +15 %
Bias Current Stability
255
ppm/°C
DATA+, DATA- Input Current I
IN
-1 +10 µA
Monitor Diode Current Stability
-480 -50 +480
ppm/°C
Monitor Diode Current
Absolute Accuracy
-15 +15 %
DC Monitor Diode Current I
MD
18 1000 µA
Bias Current Range
Supply Current 40 60 mA
I
BIAS
180mA
Bias Off Current 100 µA
Monitor Diode Input Voltage
(MD Pin)
V
MD
0.8 V
TTL Input High Voltage V
IH
2 V
TTL Input Low Voltage V
IL
0.8 V
TTL Output High Voltage (FAIL)
V
OH
2.4 V
CC
- 0.3 V
CC
V
TTL Output Low Voltage (FAIL)
V
OL
0.1 0.44 V
CONDITIONS
PECL compatible (Table 2)
Figure 1
APC open loop, 3mA ≤ I
BIAS
≤ 80mA
APC open loop
(Note 3)
Sourcing 50µA
Sinking 100µA
(Note 1)
V
BIAS
= V
CC
- 1.6V
ENABLE = high (Note 2)
MAX3663
+3.3V, 622Mbps SDH/SONET
Laser Driver with Current Monitors and APC
_______________________________________________________________________________________ 3
AC ELECTRICAL CHARACTERISTICS
(V
CC
= +3.14V to +5.5V, load as shown in Figure 2, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= +3.3V,
T
A
= +25°C.) (Note 6)
Note 1: Tested with R
MODSET
= 5.11kΩ (I
MOD
≈ 38mA), R
BIASMAX
= 4.56kΩ (I
BIAS
≈ 52mA), excluding I
BIAS
and I
MOD
.
Note 2: Both the bias and modulation currents are disabled if any of the current set pins are shorted to ground.
Note 3: Guaranteed by design and characterization. This assumes that the laser to monitor diode transfer function does not change
with temperature.
Note 4: See the Typical Operating Characteristics for worst-case distributions.
Note 5: AC characteristics are guaranteed by design and characterization.
Note 6: Total I
MOD
out of OUT+. See the Design Procedure section for information regarding current delivered to the laser.
Note 7: Input signal is a 622Mbps, 2
13
- 1 PRBS with eighty inserted 0s.
Note 8: Input signal is a 622Mbps, 11110000 pattern.
Note 9: PWD = (wider pulse - narrower pulse) / 2.
DATA+
DATA-
(DATA+) - (DATA-)
I
OUT
+
100mV MIN
800mV MAX
200mV
P-P
MIN
1600mV
P-P
MAX
I
MOD
Figure 1. Required Input Signal and Output Polarity
V
CC
15Ω
10Ω
1µF
1µF
12.4Ω
20Ω
OUT-
OUT+
BIAS
20Ω
50Ω
OSCILLOSCOPE
MAX3663
V
CC
I
OUT+
Figure 2. Output Termination for Characterization
10 135I
MOD
= 75mA
Maximum Consecutive Identical
Digits at 622Mbps
CID 80 Bits
I
MOD
= 5mA
I
MOD
= 75mA
Jitter Generation (Peak-to-Peak) 100 ps(Note 7)
205I
MOD
= 5mA (Note 4)
I
MOD
= 5mA
(Notes 8, 9)
PARAMETER SYMBOL MIN TYP MAX UNITS
230 375
psOutput Rise/Fall Time t
R,
t
F
100 200
Modulation Current Absolute
Accuracy
-15 +15 %
Pulse-Width Distortion
(Peak-to-Peak)
70 155
ps
Enable/Startup Delay 250 ns
Modulation Current Stability
-620 -165 +620
ppm/°C
CONDITIONS
20% to 80%,
R
L
= 10Ω
||
20Ω load
Open loop
I
MOD
= 75mA
Modulation Current Range I
MOD
575mA(Note 6)
Modulation Off-Current 200 µA
ENABLE = high (Note 2)
P1-P3P4-P6P7-P9P10-P12P13-P13

MAX3663ETG+T

Mfr. #:
Buy MAX3663ETG+T
Manufacturer:
Maxim Integrated
Description:
IC LASER DRIVER SONET 24-TQFN
Lifecycle:
New from this manufacturer.
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