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MAX3273EGGMAXIMN/a8avai+3.3V, 2.5Gbps Low-Power Laser Driver


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MAX3273EGG
+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’s 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 60mAP-Pwith 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 ✕4mm, 24-pin QFN package, as well as
in die form.
Applications

SONET OC-48 and SDH STM-16
Transmission Systems
Add/Drop Multiplexers
Digital Cross-Connects
2.5Gbps Optical Transmitters
Features
30mA Power-Supply Current Single +3.3V Power SupplyUp to 2.7Gbps (NRZ) OperationAutomatic Average Power Control with Failure
Monitor
Programmable Modulation Current from 5mA to
60mA
Programmable Bias Current from 1mA to 100mATypical Fall Time of 59psSelectable Data Retiming LatchComplies with ANSI, ITU, and Bellcore
SDH/SONET Specifications
MAX3273

+3.3V, 2.5Gbps Low-Power Laser Driver
Ordering Information

19-2081; Rev 1; 12/02
*EP=Exposed pad.
**Dice are designed to operate from TA= -40°C to +85°C,
but are tested and guaranteed at TA= +25°C only.
†Covered by U.S. patent number 5,883,910.
Typical Application Circuit
Pin Configuration appears at end of data sheet.
MAX3273
+3.3V, 2.5Gbps Low-Power Laser Driver
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS

(VCC= +3.14V to +3.6V, TA= -40°C to +85°C. Typical values are at VCC= +3.3V, IBIAS= 60mA, IMOD= 30mA, TA= +25°C, unless
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, VCC..............................................-0.5V to +6.0V
Current into BIAS, OUT+, OUT-......................-20mA to +150mA
Current into MD.....................................................-5mA to +5mA
Voltage at DATA+, DATA-, CLK+,
CLK-, LATCH, EN, FAIL..........................-0.5V to (VCC+ 0.5V)
Voltage at MODSET, BIASMAX,
APCSET, APCFILT1, APCFILT2.........................-0.5V to +3.0V
Voltage at BIAS.........................................+1.0V to (VCC+ 1.5V)
Voltage at OUT+, OUT-.............................+1.5V to (VCC+ 1.5V)
Current into FAIL...............................................-10mA to +10mA
Continuous Power Dissipation (TA= +85°C)
24-Pin QFN (derate 274mW/°C above +85°C)..........1781mW
Storage Temperature Range.............................-55°C to +150°C
Operating Junction Temperature......................-55°C to +150°C
Die Attach Temperature (die)..........................................+400°C
Lead Temperature (soldering, 10s).................................+300°C
MAX3273
+3.3V, 2.5Gbps Low-Power Laser Driver
AC ELECTRICAL CHARACTERISTICS

(VCC= +3.14V to +3.6V, TA= -40°C to +85°C. Typical values are at VCC= +3.3V, IBIAS= 60mA, IMOD= 30mA, TA= +25°C, unless
otherwise noted.) (Notes 5, 6)
Note 1:
Specifications at -40°C are guaranteed by design and characterization. Dice are tested at TA= +25°C only.
Note 2:
Both the bias and modulation currents are switched off if any of the current set pins is grounded.
Note 3:
Guaranteed by design and characterization.
Note 4:
Accuracy refers to part-to-part variation.
Note 5:
AC characterization was performed by using the circuit in Figure 2.
Note 6:
AC characteristics are guaranteed by design and characterization, and measured using a 2.5Gbps 213- 1 PRBS input data
pattern with 80 consecutive zeros and 80 consecutive ones added.
Note 7:
Measured using a 2.5Gbps repeating 0000 1111 pattern.
Note 8:
PWD = (wide pulse - narrow pulse) / 2.
MAX3273
+3.3V, 2.5Gbps Low-Power Laser Driver
MAX3273
+3.3V, 2.5Gbps Low-Power Laser Driver
Typical Operating Characteristics

(VCC = 3.3V, TA = +25°C, unless otherwise noted.)
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