CV221-2A Datasheet, PDF (3/5 Pages) WJ Communication. Inc. – 1.9 - 2.4 GHz Dual-Branch Downconverter

CV221-2A
1.9 – 2.4 GHz Dual-Branch Downconverter
The Communications Edge ^TM
Product Information
Application Circuit: IF = 240 MHz (CV221-2APCB240)
RF = 1900 – 2200 MHz, IF = 240 MHz
PCB Layout
Circuit Board Material: .014” FR-4, 4 layers, .062” total thickness
Bill of Materials
Ref. Desig.
R1⁽¹⁾
Component
13 Ω chip resistor
R2, R3, R4, L3, L7
L10, L11
0 Ω chip resistor
R6, R7
8.2 Ω chip resistor
C1, C5, C10, C15 1000 pF chip capacitor
C4, C11 ⁽²⁾
3 pF chip capacitor
C6, C12, C14
.018 μF chip capacitor
C7, C13
100 pF chip capacitor
L1
L4, L8 ⁽²⁾
120 nH chip inductor
82 nH chip inductor
L5, L9
220 nH chip inductor
C2, C3, C8, C9, C16
C17, C19, C20, C21
C22, L2, L6
Shown on silkscreen, but
not used in actual circuit.
U1
CV221-2A WJ Converter
Size
0805
0603
0603
0603
0603
0603
0603
0603
0603
0805
QFN
Notes:
1. 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.
2. 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:
Ref. Desig.
C4, C11
L4, L8
IF Center Frequency (MHz)
70
75 100 120 140
15 pF 15 pF 8.2 pF 8.2 pF 5.6 pF
220 nH 220 nH 180 nH 150 nH 150 nH
240
3 pF
82 nH
Specifications and information are subject to change without notice
WJ Communications, Inc • Phone 1-800-WJ1-4401 • FAX: [phone] • e-mail: [e-mail] • Web site: www.wj.com
Page 3 of 5 May 2006