PE83512 Datasheet, PDF (4/6 Pages) Peregrine Semiconductor Corp. – DC - 1500 MHz Low Power CMOS Divide-by-4 Prescaler

Figure 7. Evaluation Board Schematic Diagram
PE83512
Product Specification
Figure 8. Evaluation Board Layout
J2-7
C10
C2
10 pF 1000 pF
VDD
GND
IN
OUT
J1
C3
1000pF
PE83512
C1
1000pF
J3
N/C
CTL
GND
OUT /
C4
1000pF
J4
J5
Evaluation Kit Operation
The PE83512 EK board was designed to ease
customer evaluation of Peregrine’s high
performance Military Grade divide-by-4 Prescaler.
On this board, the device input (pin 2) is connected
via J1 and a 50 Ω transmission line. A series
capacitor (C3) provides the necessary DC block for
the device input. It is important to note that the
value of this capacitance will impact the
performance of the device. A value of 1000 pF was
found to be optimal for this board layout; other
applications may require a different value.
The device output (pin 7) is connected to connector
J3 through a 50 Ω transmission line. A series
capacitor (C1) provides the necessary DC block for
the device output. Note that this capacitor must be
chosen to have low impedance at the desired
output frequency the device. The value of 1000pF
was chosen to provide a wide operating range for
the evaluation board.
The board is constructed of a two-layer FR4
material with a total thickness of 0.031”. The
bottom layer provides ground for the RF
transmission lines. The transmission lines were
designed using a coplanar waveguide above
ground plane model with trace width of 0.030”, trace
gaps of 0.007”, dielectric thickness of 0.028”, metal
thickness of 0.0014” and ε_r of 4.4. Note that the
predominate mode for these transmission lines is
coplanar waveguide.
J2 provides DC power to the device. Starting from
the lower left pin, the second pin to the right (J2-3)
is connected to the device VDD pin (1). Two
decoupling capacitors (10pF, 1000pF) are included
on this trace. It is the responsibility of the customer
to determine proper supply decoupling for their
design application.
Applications Support
If you have a problem with your evaluation kit or if
you have applications questions call [phone]
and ask for applications support. You may also
contact us by fax or e-mail:
Fax: [phone]
E-Mail: [e-mail]
Copyright  Peregrine Semiconductor Corp. 2003
Page 4 of 6
File No. 70/0117~02A| UTSi  CMOS RFIC SOLUTIONS