ATA01502 Datasheet, PDF (1/8 Pages) ANADIGICS, Inc – AGC Transimpedance Amplifier

FEATURES
· Single +5 Volt Supply
· Automatic Gain Control
· -41 dBm Sensitivity
· 0 dBm Optical Overload
· 120 MHz Bandwidth
APPLICATIONS
· SONET OC-3/SDH STM-1 (155 Mb/s) Receiver
· FDDI, Ethernet Fiber LAN
· Low Noise RF Amplifier
ATA01502
AGC Transimpedance Amplifier
SONET OC-3
PRELIMINARY DATA SHEET-Rev 2
100 µm
VDD1
925 µm
IIN
GND
VDD2
GND
GND
VOUT
GND
GND _{GND CBY} CBY GND C_AGC GND
1250 µm
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
I_IN
negG.oNsruDpply
AGC
40K
70K
+
- 45
+ 0.8
VGA
US PATENT
V_DD2
C_AGC
4.5pF
V_OUT
GND
C_BY
Photodector cathode must be connected to I_IN
for proper AGC Operation
Figure 1: Equivalent Circuit
08/2001