Fiber-to-the-Home RF Amplifier
FEATURES
ACA2604
Data Sheet - Rev 2.1
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50 - 870 MHz Operating Frequency
High Linearity: 65 dBc CTB/CSO (79 Chan.)
Low Equivalent Input Noise: 4.5 pA/rtHz
22 dB Gain Adjust
400
Differential Input Impedance: No
Transformer Required for Interface to Photodiode
Single +5 V Supply
5 mm x 5 mm x 1 mm Surface Mount Package
RoHS Compliant Package
Pin Compatible with the ACA2601
FTTH RF Amplifier Used in Conjunction With
Triplexer in Fiber-Coax Line Terminals
AC
A
26
04
APPLICATIONS
S29 Package
28 Pin QFN
5 mm x 5 mm x 1 mm
PRODUCT DESCRIPTION
The ANADIGICS ACA2604 amplifier for Fiber-to-the-
Home (FTTH) applications is intended to be used
in conjunction with the triplexer in fiber-coax line
terminals. The device is driven by, and amplifies the
output of, the video downstream path photodiode.
The high-impedance input of the ACA2604 eliminates
the need for a costly transformer usually needed to
interface to the photodiode, and a low equivalent input
noise level offers excellent sensitivity. The device
provides sufficient linearity to maintain low CTB and
Supply
CSO levels in full-bandwidth (132 channel) systems,
even across a wide gain adjustment range.
The ACA2604 is manufactured using ANADIGICS’s
proven MESFET technology that offers state-of-the-
art reliability, temperature stability and ruggedness.
The device operates from a single +5 V supply and
is offered in a 5 mm x 5 mm x 1 mm surface mount
package.
Attenuator
Control
Matching
Circuit
LNA
Voltage
Controlled
Attenuator
Output
Amplifier
1:1
Transmission
Line Balun
RF Output
ACA2604
Figure 1: Application Block Diagram
11/2008
ANADIGICS [ ANADIGICS, INC ]
