ARA2004_11 Datasheet, PDF (15/21 Pages) ANADIGICS, Inc – Address-Programmable Reverse Amplifier with Step Attenuator

ARA2004
Output Transformer
Matching the output of the ARA2004 to a 75 Ohm load
is accomplished using a 2:1 turns ratio transformer. In
addition to providing an impedance transformation, this
transformer provides the bias to the output amplifier
stage via the center tap.
The transformer also cancels even mode distortion
products and common mode signals, such as the
voltage transients that occur while enabling and
disabling the amplifiers. As a result, care must be
taken when selecting the transformer to be used at
the output. It must be capable of handling the RF and
DC power requirements without saturating the core,
and it must have adequate isolation and good phase
and amplitude balance. It also must operate over
the desired frequency and temperature range for the
intended application.
ESD Sensitivity
Electrostatic discharges can cause permanent damage
to this device. Electrostatic charges accumulate
on test equipment and the human body, and can
discharge without detection. Although the ARA2004
has some built-in ESD protection, proper precautions
and handling are strongly recommended. Refer to the
ANADIGICS application note on ESD precautions.
Figure 19: Solder Mask Outline
Data Sheet- Rev 2.2
15
04/2011