19-2081; Rev 1; 12/02
+3.3V, 2.5Gbps Low-Power Laser Driver
General Description
The MAX3273 is a compact, low-power laser driver for
applications up to 2.7Gbps. The device uses a single
+3.3V supply and typically consumes 30mA. The bias
and modulation current levels are programmed by
external resistors. An automatic power-control (APC)
loop is incorporated to maintain a constant average
optical power over temperature and lifetime. The laser
driver is fabricated using Maxim鈥檚 in-house, second-
generation SiGe process.
The MAX3273 accepts differential CML-compatible
clock and data input signals. Inputs are self-biased to
allow AC-coupling. An input data-retiming latch can be
enabled to reject input jitter if a clock signal is avail-
able.
The driver can provide bias current up to 100mA and
modulation current up to 60mA
P-P
with typical (20% to
80%) edge speeds of 59ps. A failure-monitor output is
provided to indicate when the APC loop is unable to
maintain average optical power. The MAX3273 is avail-
able in a 4mm
鉁?/div>
4mm, 24-pin QFN package, as well as
in die form.
o
30mA Power-Supply Current
o
Single +3.3V Power Supply
o
Up to 2.7Gbps (NRZ) Operation
o
Automatic Average Power Control with Failure
Monitor
o
Programmable Modulation Current from 5mA to
60mA
o
Programmable Bias Current from 1mA to 100mA
o
Typical Fall Time of 59ps
o
Selectable Data Retiming Latch
o
Complies with ANSI, ITU, and Bellcore
SDH/SONET Specifications
Features
MAX3273
鈥?/div>
Ordering Information
PART
MAX3273EGG
MAX3273E/D
TEMP RANGE
-40擄C to +85擄C
-40擄C to +85擄C
PIN-PACKAGE
24 QFN-EP* (4mm
脳
4mm)
Dice**
Applications
SONET OC-48 and SDH STM-16
Transmission Systems
Add/Drop Multiplexers
Digital Cross-Connects
2.5Gbps Optical Transmitters
*EP=Exposed pad.
**Dice are designed to operate from T
A
= -40擄C to +85擄C,
but are tested and guaranteed at T
A
= +25擄C only.
Pin Configuration appears at end of data sheet.
Typical Application Circuit
V
CC
0.01碌F
V
CC
APCFILT1
V
CC
APCFILT2
LATCH
25鈩?/div>
OUT-
L
P2
DATA -
OUT+
25鈩?/div>
0.056碌F
20鈩?/div>
L
P1
L
P1
DATA +
50鈩?/div>
100鈩?/div>
DATA +
DATA -
2.5Gbps
SERIALIZER
WITH CLOCK
GENERATION
CLK+
50鈩?/div>
MAX3273
50鈩?/div>
100鈩?/div>
MODSET
BIASMAX
APCSET
GND
CLK+
BIAS
FAIL
EN
CLK-
50鈩?/div>
CLK-
MD
500pF
REPRESENTS A CONTROLLED-IMPEDANCE TRANSMISSION LINE.
鈥?/div>
Covered by U.S. patent number 5,883,910.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.
MAX3273 PDF文件相關型號
MAX3273E/D,MAX3273EGG
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