MAX3261 Datasheet, PDF (9/12 Pages) Maxim Integrated Products – Single +5V, Fully Integrated, 1.25Gbps Laser Diode Driver

Single +5V, Fully Integrated,
1.25Gbps Laser Diode Driver
PECL
5V
SIGNAL SOURCE
a) THEVENIN-EQUIVALENT TERMINATION
NON-PECL
SIGNAL SOURCE
50Ω
b) DIFFERENTIAL NON-PECL TERMINATION
50Ω
5V
82Ω
120Ω
82Ω
VIN+
MAX3261
VIN-
120Ω
VIN+
5V
50Ω
680Ω
MAX3261
50Ω
1.8k
VIN-
NON-PECL
SIGNAL SOURCE
50Ω
c) SINGLE-ENDED NON-PECL TERMINATION
ECL
OV
SIGNAL SOURCE
d) ECL TERMINATION
THIS SYMBOL REPRESENTS
A TRANSMISSION LINE
WITH CHARACTERISTIC
IMPEDANCE Z_o = 50Ω.
Figure 4. Alternative PECL Data-Input Terminations
68Ω
5V
5V
680Ω
1.8k
5V
VIN+
180Ω
MAX3261
VIN-
1.3k
1.3k
50Ω
3.6k
-2V
VIN+
MAX3261
VIN-
50Ω
3.6k
-2V
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