AGC Transimpedance Amplifier
SONET OC-24
FEATURES
·
·
·
·
·
Single +5 Volt Supply
Automatic Gain Control
-31 dBm Sensitivity
0 dBm Optical Overload
1100 MHz Bandwidth
925 um
VDD1
ATA12001
PRELIMINARY DATA SHEET-Rev 4
V
DD2
GND
GND
1992
4E
I
IN
APPLICATIONS
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·
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SONET OC-24 (1 Gb/s) Receiver
Low Noise RF Amplifier
GND
GND
GND GND
C
BY
C
BY
GND
C
AGC
V
OUT
GND
BISDN
HIPPI
1250 um
D1C
PRODUCT DESCRIPTION
The ANADIGICS ATA12001 is a 5V low noise
transimpedance amplifier with AGC designed to be
used in 1Gb/s 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 ATA12001 offers a
bandwidth of 1100MHz and a dynamic range of 31dB.
It is manufactured in a GaAs MESFET process and
is available in bare die form.
V
DD1
AGC
4K
70K
V
DD2
C
AGC
GND
or
neg. Supply
I
IN
- 35
VGA
4pF
+ 0.8
V
OUT
GND
PATENT PENDING
BY
Photodetector Cathode must be connected to
I
IN
for proper AGC operation
C
Figure 1: Equivalent Circuit
08/2001
ANADIGICS [ ANADIGICS, INC ]
