06/2002
ATA7603
10 Gb/s High Overload TIA
PRELIMINARY DATA SHEET - Rev 1.0
D1
Die
FEATURES
• 1800 Ω Differential Transimpedance
3 mApp Maximum Input Current
14 pA/√Hz Input Noise Current Density
Single –5.2 V Power Supply
Low Group Delay
Outputs DC or AC Coupled
APPLICATIONS
SONET/SDH OC-192 /STM-64 VSR,
Short-Reach, Intermediate-Reach, and
Long-Reach Receivers
10 Gb/s Ethernet
Fiber optic receivers, transceivers, and
transponders
PRODUCT DESCRIPTION
The ANADIGICS ATA7603 is a –5.2 V high-speed
transimpedance amplifier (TIA) designed for
10 Gb/s optical receiver applications available in
bare die form and manufactured using an InGaP
based HBT process. The device is used in
conjunction with a photodetector to convert an
optical signal into a differential output voltage that
can be AC or DC coupled to a post amplifier. The
ATA7603 has an internal overload support circuit and
can accept optical inputs as high as +3 dBm. With
its low noise and high optical overload capability,
the device is well suited for 10 Gb/s Ethernet and
OC-192 Very Short-Reach (VSR), Short-Reach,
Intermediate-Reach and Long-Reach optical
receivers, transceivers and transponders.
Figure 1: Circuit Block Diagram
VBIAS
IIN
VREF
DC
Offset
Control
Low Pass
Filter
CEXT
VEE
VOUT
VOUT
IIN
VOUT
CEXT
VEE GND
GNDGND
GND
VEE
VOUT
GND