CN-0211 Datasheet, PDF (5/6 Pages) Analog Devices – IF Band-Pass Filter Bank Switching Network for Wireless Infrastructure

Circuit Note
CN-0211
VECTOR NETWORK
ANALYZER
U6
ADG904-R U1
ADG904-R U2
U5
J4
J5
VDD
2.5V GND
U4
J12
EVAL-CN0211-EB1Z
Figure 7. Test Setup Functional Block Diagram
Equipment Needed
• Vector Network Analyzer, Hewlett Packard 8753E
with Hewlett Packard 85033D 3.5 mm Calibration Kit,
or equivalent.
• EVAL-CN0211-EB1Z Circuit Evaluation Board
• Power supply (2.5V)
• Coaxial RF cable with 3.5 mm type connectors
•
Setup and Test
The test setup is shown in Figure 7. The VNA is connected to
the circuit evaluation board through 3.5 mm connector type
cables. Full two port calibration of the VNA to the end of the
cables will be required before testing of the circuit evaluation
board. Table 1 shows the logic states to enable each individual
filter channel.
Table 1. Truth Table for Filter Path Selection
FILTER
U6
U5
U4
ADG904-R
EN
U1
A0
A1
0
1
0
0
0
1
0
0
0
ADG904-R
U2
A0
A1
0
0
1
1
1
0
.
LEARN MORE
CN0211 Design Support Package:
www.analog.com/CN0211-DesignSupport
Corrigan, Theresa, AN-952 Application Note, ADG9xx
Wideband CMOS Switches: Frequently Asked Questions,
Analog Devices.
MT-101 Tutorial, Decoupling Techniques, Analog Devices.
Rev. 0 | Page 5 of 6