AGC Transimpedance Amplifier
SONET OC-12
PRELIMINARY DATA SHEET-Rev 4
FEATURES
·
·
·
·
·
Single +5 Volt Supply
Automatic Gain Control
-32 dBm Sensitivity
0 dBm Optical Overload
550 MHz Bandwidth
ATA06211
APPLICATIONS
·
·
·
·
·
SONET OC-12 /SDH STM-4 (622Mb/s)
Receiver
FITL
BISDN
Workstation Interconnects
Low Noise RF Amplifier
D1
PRODUCT DESCRIPTION
The ANADIGICS ATA06211 is a 5V low noise
transimpedance amplifier with AGC designed to be
used in OC-12/STM-4 fiber optic links. The device is
used in conjunction with a photodetector (PIN diode
or avalanche photodiode) to convert an optical signal
V
DD1
into an output voltage. The ATA06211 offers a
bandwidth of 550MHz and a dynamic range of 32dB.
It is manufactured in a GaAs MESFET process and
is available in bare die form.
V
DD2
AGC
19 K
70K
+
4pF
I
IN
GND
or
neg.supply
C
AGC
- 35
VGA
+ 0.8
V
OUT
GND
US PATENT
C
BY
Photodector cathode must be connected
to
I
IN
for proper AGC operation
Iin
Figure 1: Equivalent Circuit
08/2001
ANADIGICS [ ANADIGICS, INC ]
