AGC Transimpedance Amplifier
SONET OC-3
PRELIMINARY DATA SHEET-Rev 2
FEATURES
·
·
·
·
·
Single +5 Volt Supply
Automatic Gain Control
-41 dBm Sensitivity
0 dBm Optical Overload
120 MHz Bandwidth
925
µ
m
I
IN
GND
V
DD1
GND
GND
ATA01502
100
µ
m
V
DD2
APPLICATIONS
·
·
·
SONET OC-3/SDH STM-1 (155 Mb/s) Receiver
FDDI, Ethernet Fiber LAN
Low Noise RF Amplifier
V
OUT
GND
GND
GND
CBY
CBY
GND
C
AGC
GND
1250
µ
m
D1
PRODUCT DESCRIPTION
The ANADIGICS ATA01502 is a 5V low noise
transimpedance amplifier with AGC designed to be
used in OC-3/STM-1 fiber optic links. The device is
used in conjunction with a photodetector (PIN diode
or avalanche photodiode) to convert an optical signal
into an output voltage. The ATA01502 offers a
bandwidth of 120MHz and a dynamic range of 42dB.
It is manufactured in a GaAs MESFET process and
is available in bare die form.
V
DD1
V
DD2
AGC
40K
70K
+
I
IN
GND
or
neg.supply
C
AGC
4.5pF
V
OUT
- 45
VGA
+ 0.8
US PATENT
GND
C
BY
Photodector cathode must be connected to I
IN
for proper AGC Operation
Figure 1: Equivalent Circuit
08/2001
ANADIGICS [ ANADIGICS, INC ]
