cv210-2a WJ Communications, Inc., cv210-2a Datasheet - Page 2

• Manufacturer Part Number: cv210-2a
• Description: Cellular-band Dual-branch Downconverter
• Manufacturer: WJ Communications, Inc.

CV210-2A: The application circuit can be broken up into three main
functions as denoted in the colored dotted areas above: RF/IF diplexing
(blue), IF amplifier matching (green), and dc biasing (purple). There are
various placeholders for chip components in the circuit schematic so that
a common PCB can be used for all WJ dual-branch converters. Further
details are given in the Application Note located on the website titled
“CV2xx Series - PWB Design Guidelines”.
External Diplexer:
signal impinges on the switching elements of the mixer; the interaction
with these switches produces a signal at the IF frequency. The two
signals (RF and IF) are directed to the appropriate ports by the external
diplexer. A six-element diplexer is used in the circuit implementation.
WJ Communications, Inc • Phone 1-800-WJ1-4401 • FAX: [phone] • e-mail: [e-mail] • Web site: www.wj.com, www.TriQuint.com
GND
BIAS
GND
GND
N/C
N/C
N/C
1
2
3
4
5
6
7
28
8
27
9
RF/IF
RF/IF
CV210-2A
Cellular-band Dual-Branch Downconverter
26
10
LPF
25
11
IF Amp 1
IF Amp 2
LO Driver Amp
In a downconversion application, the incoming RF
24
12
Device Architecture / Application Circuit Information
23
13
22
14
21
20
19
18
17
16
15
BIAS
GND
N/C
GND
LO
GND
N/C
LO Amp / MMIC Mixer
* The 2
IF Amplifier
of the MCM to be 385 mA.
CV210-2A
Stage
nd
branch includes another mixer and IF amplifier, which increases the total current consumption
Typical Downconverter Performance Chain Analysis (Each Branch)
Gain
(dB)
19
-9
Cumulative Performance
IF Amplifier Matching:
elements to optimize the performance of the amplifier to the desired
IF center frequency. Since IF bandwidths are typically on the order
of 5 to 10%, a simple two element matching network, in the form of
either a high-pass or low-pass filter structure, is sufficient to match
the MMIC IF amplifier over these narrow bandwidths.
component values for other IF center frequencies can be provided by
emailing to [e-mail].
DC biasing:
in the converter. R1 sets the operating current for the last stage of the
LO amplifier and is chosen to optimize the mixer LO drive level.
Proper RF chokes and bypass capacitors are chosen for proper
amplifier biasing at the intended frequency of operation. The “+5 V”
dc bias should be supplied directly from a voltage regulator.
(dBm)
Input
P1dB
11
2
Printed Circuit Board Material:
.014” FR-4, 4 layers, .062” total thickness
(dBm)
Input
IP3
30
22
DC bias must be provided for the LO and IF amplifiers
(dB)
Specifications and information are subject to change without notice.
NF
9.3
1.8
Current
(mA)
385*
150
85
The IF amplifier requires matching
Gain
(dB)
10
10
-9
Product Information
Cumulative Performance
(dBm)
Input
P1dB
11
+8
8
Page 2 of 6 March 2006
(dBm)
Input
+27.5
27.5
IP3
30
Proper
(dB)
NF
9.3
11
11