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LG1626DXC Datasheet

  • LG1626DXC

  • LG1626DXC Modulator Driver

  • 10頁(yè)

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Data Sheet
February 1999
LG1626DXC Modulator Driver
Features
s
s
s
s
s
s
s
s
Functional Description
The LG1626DXC is a gallium-arsenide (GaAs) inter-
grated circuit used to provide voltages to drive optical
modulators in high-speed non-return-to-zero (NRZ)
transmission systems. The device is made in a high-
performance 0.9
碌m
gate GaAs hetero-junction FET
technology that utilizes high-density MIM capacitors,
airbridge interconnect, and NiCr film precision resis-
tors. The device contains four cascaded stages,
operates with a single 鈥?.2 V power supply, and
accepts ECL 100K level inputs. The output is an
open drain designed to drive 50
鈩?/div>
loads. Voltages
control the output modulation amplitude and modula-
tor dc offset. A 鈥?.5 V band-gap reference is required
for stable operation over temperature and varying
power supply voltage. The LG1626DXC is available
in a 24-lead hermetic, gull-wing package.
High data-rate optical modulator driver
Adjustable output voltage up to 3 Vp-p (R
L
= 50
鈩?
Adjustable modulator dc offset
Operation up to 3 Gbits/s
Single ended or differential inputs
Single 鈥?.2 V power supply
90 ps rise and fall times
Enable control
Applications
s
s
s
SONET/SDM transmission systems
SONET/SDM test equipment
Optical transmitters
GND
BG2P5
MK
V
TH
MK
V
DC-ADJ
V
IN
V
OUT
V
IN
V
OUT-DC
V
TH
V
MOD
V
SS3
V
SS2
V
SS1
5-6549(F)
MOD_E
Figure 1. Functional Diagram

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