4280-52 Peregrine Semiconductor, 4280-52 Datasheet - Page 4

• Manufacturer Part Number: 4280-52
• Description: IC RF SWITCH SPDT 75 OHM 20QFN
• Manufacturer: Peregrine Semiconductor
• Series: UltraCMOS™r

Specifications of 4280-52

• Rf Type: General Purpose
• Frequency: 5MHz ~ 2.2GHz
• Features: SPDT
• Package / Case: 20-VFQFN Exposed Pad
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 4280-52PER

Evaluation Kit
The SPDT Switch Evaluation Kit board was
designed to ease customer evaluation of the
PE4280 SPDT switch. The RFC port is connected
through a 75 Ω transmission line to J2. Port 1 and
Port 2 are connected through 75 Ω transmission
lines to J1 and J3. A through transmission line
connects F connectors J4 and J5. This
transmission line can be used to estimate the loss
of the PCB over the environmental conditions
being evaluated.
The board is constructed of a four metal layer
FR4 material with a total thickness of 0.062". The
transmission lines were designed using a
coplanar waveguide with ground plane (28 mil
core, 21 mil width, 30 mil gap).
J6 provides a means for controlling DC and digital
inputs to the device. The provided jumpers short
the package pin to ground for logic low. When the
jumper is removed, the pin is pulled up to V
logic high.
When the jumper is in place, 3 µA of current will
flow through the 1 MΩ pull up resistor. This extra
current should not be attributed to the
requirements of the device.
Proper PCB design is essential for full isolation
performance. This eval board demonstrates good
trace and ground management for minimum
coupling and radiation.
©2010-11 Peregrine Semiconductor Corp. All rights reserved.
Page 4 of 8
J1 J1
J2 J2
1
1
75 OHM T-Line
DD
75 OHM T-Line
for
21
1
2
3
4
5
Figure 4. Evaluation Board Layouts
Figure 5. Evaluation Board Schematic
GND
GND
RF1
GND
GND
GND
PE4280
PE4280
Document No. 70-0164-05
U1
U1
Peregrine Specification 101/0148~03A
Peregrine Specification 102/0195~02A
GND
GND
GND
GND
RF2
15
14
13
12
11
J4 J4
1
C1
C1
DNI
DNI
│ UltraCMOS™ RFIC Solutions
R1
R1
1M
1M
C2
C2
DNI
DNI
75 OHM T-Line
75 OHM T-Line
R2
R2
1M
1M
C3
C3
DNI
DNI
Product Specification
11
13
1
3
5
7
9
J6
J6
HEADER 7X2
HEADER 7X2
VDD
GND
VSS/GND
GND
C1
GND
C2
PE4280
GND
GND
GND
GND
GND
GND
GND
2
4
6
8
10
12
14
1
1
J3 J3
J5 J5