4

PD

PD

LD

NC

NC

TEC

GND

GND

Blocking

Capacitor

Ex. 0.1µF

Din

GND

DinB

GND

Vx1

Vx2

Cross Point Control

Bias Voltage Control

Supply Voltage

Modulation Voltage Control

VSS

Vm

Vb

Ther r

TEC

Chip

Capacitor

0.1µF

Chip

Capacitor

0.1µF

Typical Application for Driver IC

For stable operation:

8-1. To prevent a dependence of “Cross point” on the supply voltage VSS,

(1) Use an external voltage source of -3.8V for “Vx2”, or

(2) Control the voltage of “Vx1”, so that the voltage difference “Vx1-Vx2” remain constant.

8-2. To prevent a dependence of “Modulation control voltage” on the supply voltage VSS,

control the voltage of “Vm”, so that the difference “Vm-VSS” remain constant.

8-3. To prevent a dependence of “Bias control voltage” on the supply voltage VSS,

control the voltage of “Vb”, so that the difference “Vb-VSS” remain constant.

Driver Integrated 10Gb/s

MI-DFB LD Module

FTM1141GF