cv221-2a WJ Communications, Inc., cv221-2a Datasheet - Page 3

• Manufacturer Part Number: cv221-2a
• Description: 1.9-2.4 Ghz Dual-branch Downconverter
• Manufacturer: WJ Communications, Inc.

Notes:
WJ Communications, Inc • Phone 1-800-WJ1-4401 • FAX: [phone] • e-mail: [e-mail] • Web site: www.wj.com, www.TriQuint.com
1.
2.
The R1 resistor can be modified for the CV221-2A to draw less current. Changing it from 13 to 18Ω is expected to have the converter draw 17mA
less current so that the converter will draw about 300mA typically under LO drive, while degrading the IIP3 performance by 0.5 dB.
The values shown above have the IF tuned at 240 MHz and will affect the optimal performance of the converter. For other frequencies, these
components need to be modified as follows:
CV221-2A
1.9 – 2.7 GHz Dual-Branch Downconverter
Ref. Desig.
C4, C11
L4, L8
Application Circuit: IF = 240 MHz (CV221-2APCB240)
390 nH 220 nH 220 nH 180 nH 150 nH 150nH 150 nH 120 nH 110 nH 82 nH
18 pF
50
RF = 1900 – 2700 MHz, IF = 240 MHz
15 pF
70
15 pF
75
IF Amplifier Matching
8.2 pF
100
8.2 pF
120
Circuit Board Material: .014” FR-4, 4 layers, .062” total thickness
6.8pF
130
5.6 pF
140
Specifications and information are subject to change without notice
Ref. Desig.
R1
R2, R3, R4, L3, L7
L10, L11
R6, R7
C1, C5, C10, C15
C4, C11
C6, C12, C14
C7, C13
L1
L4, L8
L5, L9
C2, C3, C8, C9, C16
C17, C19, C20, C21
C22, L2, L6
U1
(1)
5.6 pF
Bill of Materials
155
(2)
PCB Layout
(2)
3.9pF
180
Component
13 Ω chip resistor
0 Ω chip resistor
8.2 Ω chip resistor
1000 pF chip capacitor
3 pF chip capacitor
.018 μF chip capacitor
100 pF chip capacitor
120 nH chip inductor
82 nH chip inductor
220 nH chip inductor
Shown on silkscreen, but
not used in actual circuit.
CV221-2A WJ Converter
3.0 pF
240
Page 3 of 5 August 2007
Size
0805
0603
0603
0603
0603
0603
0603
0603
0603
0805
QFN