MAX3934 Datasheet, PDF (1/10 Pages) Maxim Integrated Products – 10.7Gbps Compact Laser Diode Driver

19-2605; Rev 0; 10/02
10.7Gbps Compact Laser Diode Driver
General Description
The MAX3934 is a compact +5V or -5.2V laser driver
designed to directly modulate a laser diode at data
rates up to 10.7Gbps. The driver provides externally
programmable laser biasing and modulation currents.
DC-coupling with an integrated compensation network,
consisting of a series-damping resistor and a shunt RC,
makes the MAX3934 ideal for compact subassemblies.
The MAX3934 accepts a differential CML or PECL data
signal and includes 50Ω on-chip termination resistors. It
delivers a 1mA to 60mA laser bias current and a 20mA
to 80mA laser modulation current with a typical edge
speed of 25ps (20% to 80%). A high-bandwidth, fully
differential signal path is internally implemented to mini-
mize jitter accumulation. Additional features include a
data polarity control, bias current, and modulation cur-
rent monitors.
Applications
Compact Optical
Transmitters
Add/Drop Multiplexer
XFP Modules
XENPAK/XPAK Modules
Features
o 1.30mm × 1.35mm Die Size
o Integrated Compensation Network
o Single +5V or -5.2V Power Supply
o 73mA Supply Current
o Up to 10.7Gbps (NRZ) Operation
o Programmable Laser Bias Current Up to 60mA
o Programmable Modulation Current Up to 80mA
o Polarity Control
o 25ps Output Edge Speed
o CML-/PECL-Compatible Signal Inputs
o Integrated Input Termination Resistors
Ordering Information
PART
TEMP RANGE ^PIN-
PACKAGE
R_D/C_COMP**
MAX3934AE/D -40°C to +85°C Dice*
12Ω/580fF
MAX3934BE/D -40°C to +85°C Dice*
15Ω/464fF
*Dice are designed to operate over a -40°C to +120°C junction
temperature (T_J) range, but are tested and guaranteed only at
T_A = +25°C.
**See Figure 3.
Typical Application Circuit
V_CC
SDO+
SDO-
MAX3952
10Gbps
SERIALIZER
V_BIAS
V_EE
V_CC
50Ω
50Ω
V_CC
V_EE
V_EE
BIASMON
V_CC
BIASSET
V_CC
OUT1-
IN+
IN-
PLRT
V_EE
V_EE
MAX3934
MODMON
V_CC
OUT1+
OUT2+ _VCC
OUT2-
BIAS
MODSET
V_CC
V_EE
L_B
†_C0
REPRESENTS A CONTROLLED
IMPEDANCE TRANSMISSION LINE
V_MOD
V_EE
V_EE
V_EE
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