SONET/SDH 10.7Gb/s
Laser Diode Driver
I (MIB)
30mA
VITESSE
SEMICONDUCTOR CORPORATION
Advance Product Information
VSC7990
Figure 3: Control Signals VIP and VIB
I (MIP)
60mA
VIB
VSS + 1.5V (typical)
Typical Bias Current vs. Bias Voltage
VIP
VSS + 1.5V (typical)
Typical Modulation Current vs. Modulation Voltage
Figure 4: Simplified Output Structure
VDD
NIOUT IOUT
IBIAS
Output
VIP
Differential
Pair
MIP
300Ω 2.5kΩ
3Ω
IMOD
IBIAS
500Ω
VIB
MIB
2.5kΩ
3Ω
vSS
vSS
Page 6
© VITESSE SEMICONDUCTOR CORPORATION • 741 Calle Plano • Camarillo, CA 93012
Tel: (800) VITESSE • FAX: (805) 987-5896 • Email: prodinfo@vitesse.com
Internet: www.vitesse.com
G52303-0, Rev 2.0
12/15/00