WJ CV221-2AF 1.9 - 2.7 ghz dual-branch downconverter Datasheet

CV221-2A
1.9 – 2.7 GHz Dual-Branch Downconverter
IF1
OUTPUT
GND
26
AMP1
INPUT
GND
27
GND
MIXER
IF1
28
25
24
23
22
IF
RF
21 BIAS
GND 2
20 GND
IF Amp 1
BIAS 3
19 GND
GND 4
18 GND
GND 5
LO Driver Amp
17 LO
GND 6
IF Amp 2
16 GND
15 GND
8
9
10
11
12
13
14
GND
IF
RF
IF2
OUTPUT
RF 2 7
INPUT
GND
It is ideally suited for high dynamic range receiver front
ends using diversity receive channels. Functionality
includes frequency conversion and IF amplification,
while an integrated LO driver amplifier powers the
passive mixer. The MCM is implemented with reliable
and mature GaAs MESFET and InGaP HBT technology.
RF 1
1
INPUT
GND
Dual channels for diversity
+28 dBm Input IP3
+11.5 dBm Input P1dB
RF: 1900 – 2700 MHz
IF: 65 – 300 MHz
+5V Single supply operation
RoHS-compliant / Pb-free
6x6mm 28-pin QFN package
• Low-side LO configuration
AMP2
INPUT
•
•
•
•
•
•
•
The CV221-2A is a dual-channel high-linearity downconverter designed to meet the demanding performance,
functionality, and cost goals of current and next generation
mobile infrastructure basestations and repeaters. It
provides high dynamic range performance in a low profile
RoHS-compliant/lead-free surface-mount leadless package
that measures 6 x 6 mm square.
GND
• High dynamic range downconverter
with integrated LO and IF amplifiers
Functional Diagram
GND
Product Description
MIXER
IF2
Product Features
Typical applications include frequency downconversion
used in 3G W-CDMA and WiMax basestation
transceiver or repeater applications.
Specifications (1)
Parameters
RF Frequency Range
LO Frequency Range
IF Frequency Range
% Bandwidth around IF center
frequency
IF Test Frequency
SSB Conversion Gain
Gain Drift over Temp (-40 to 85
°C)
Input IP3
Input 1 dB Compression Point
Noise Figure
LO Input Drive Level
LO-RF Isolation
LO-IF Isolation
RF-IF Isolation
Branch-Branch Isolation
Return Loss: RF Port
Return Loss: LO Port
Return Loss: IF Port
Operating Supply Voltage
Supply Current
Thermal Resistance
Junction Temperature
Units
Min
Typ
Max
Min
Typ
MHz
MHz
MHz
1900 – 2400
1600 – 2335
65 – 300
2500 – 2700
2200 – 2565
135 – 300
%
MHz
dB
±7.5
240
9.2
±12
155
8.4
dB
dBm
dBm
dB
dBm
dB
dB
dB
dB
dB
dB
dB
V
mA
°C / W
°C
6.5
+24
-2.5
±0.6
+28
+11.5
11
0
12
26
25
45
14
14
13
+5
315
10.5
5.4
±0.6
+22
+8.0
13
0
9
26
25
40
12
14
10
+5
315
+17
+2.5
-2.5
330
34
160
Max
Comments
See note 2
See note 3
9.9
Temp = 25 °C
Referenced to +25 °C
See note 4
See note 4
See note 5
+2.5
PLO = 0 dBm
PLO = 0 dBm
330
34
160
See note 6
See note 6
1. Specifications when using the application specific circuit (shown on page 3) with a low side LO = 0 dBm and IF = 240 MHz in a downconverting application at 25 °C.
2. IF matching components affect the center IF frequency. Proper component values for other IF center frequencies than shown can be provided by emailing to [email protected].
3. The IF bandwidth of the converter is defined as 15% around any center frequency in its operating IF frequency range. The bandwidth is determined with external components. Specifications are valid around
the total ±7.5% bandwidth. ie. with a center frequency of 240 MHz, the specifications are valid from 240 ± 18 MHz.
4. Assumes the supply voltage = +5 V. IIP3 is measured with Δf = 1 MHz with RFin = -5 dBm / tone.
5. Assumes LO injection noise is filtered at the thermal noise floor, -174 dBm/Hz, at the RF, IF, and Image frequencies.
6. 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.
Absolute Maximum Rating
Parameter
Operating Case Temperature
Storage Temperature
DC Voltage
Junction Temperature
Rating
-40 to +85 °C
-55 to +150 °C
+5.5 V
+220 °C
Ordering Information
Part No.
Description
1.9-2.7GHz Dual-Branch Downconverter
CV221-2AF
(lead-free/RoHS-compliant 6x6mm QFN package)
CV221-2APCB240 Fully Assembled Eval. Board, IF = 240MHz
Operation of this device above any of these parameters may cause permanent damage.
Specifications and information are subject to change without notice
WJ Communications, Inc • Phone 1-800-WJ1-4401 • FAX: 408-577-6621 • e-mail: [email protected] • Web site: www.wj.com
Page 1 of 5 June 2007
CV221-2A
1.9 – 2.7 GHz Dual-Branch Downconverter
RF 1
1
INPUT
GND
26
IF1
OUTPUT
GND
27
AMP1
INPUT
MIXER
IF1
28
GND
GND
Device Architecture / Application Circuit Information
25
24
23
22
IF
RF
GND 2
20 GND
IF Amp 1
BIAS 3
Stage
19 N/C
GND 4
18 GND
N/C 5
GND 6
LO Driver Amp
17 LO
IF Amp 2
16 GND
15 N/C
IF
8
9
10
11
12
13
14
GND
GND
AMP2
INPUT
GND
IF2
OUTPUT
GND
RF
MIXER
IF2
RF 2 7
INPUT
Typical 2.1 GHz Downconverter Performance Chain Analysis (Each Branch)
21 BIAS
LO Amp / MMIC Mixer
IF Amplifier
CV221-2A
Gain
(dB)
Input
P1dB
(dBm)
Input
IP3
(dBm)
NF
(dB)
-8.4
20
33
9
17.6
1
21
2.2
Cumulative Performance
Current
(mA)
115
100
315*
Cumulative Performance
Input
Input
NF
P1dB
IP3
(dB)
(dBm)
(dBm)
-8.4
20
33
9
9.2
9
27.8
11
9.2
9
27.8
11
Gain
(dB)
* The 2nd branch includes another mixer and IF amplifier, which increases the total current consumption
of the MCM to be 315 mA.
Printed Circuit Board Material:
.014” FR-4, 4 layers, .062” total thickness
CV221-2A: 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.
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. Proper
component values for other IF center frequencies can be provided by
emailing to [email protected].
External Diplexer: This is only used with the cellular-band CV
products. The mixer performs the diplexing internally for the
CV221-2A; therefore the components shown in the diplexer section
should be not be loaded except for L3, L10, L7, and L11, which
should contain a 0 Ω jumper.
DC Biasing: DC bias must be provided for the LO and IF amplifiers
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.
IF Amplifier Matching: The IF amplifier requires matching
elements to optimize the performance of the amplifier to the desired
IF center frequency. Since IF bandwidths are typically on the order
WiMax Operation: There is no change to the application circuit for
operation in the 2.5 to 2.7 GHz band.
Specifications and information are subject to change without notice
WJ Communications, Inc • Phone 1-800-WJ1-4401 • FAX: 408-577-6621 • e-mail: [email protected] • Web site: www.wj.com
Page 2 of 5 June 2007
CV221-2A
1.9 – 2.7 GHz Dual-Branch Downconverter
Application Circuit: IF = 240 MHz (CV221-2APCB240)
RF = 1900 – 2700 MHz, IF = 240 MHz
PCB Layout
Circuit Board Material: .014” FR-4, 4 layers, .062” total thickness
Bill of Materials
Ref. Desig.
R1(1)
R2, R3, R4, L3, L7
L10, L11
R6, R7
C1, C5, C10, C15
C4, C11 (2)
C6, C12, C14
C7, C13
L1
L4, L8 (2)
L5, L9
C2, C3, C8, C9, C16
C17, C19, C20, C21
C22, L2, L6
U1
Component
13 Ω chip resistor
Size
0805
0 Ω chip resistor
0603
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
0603
0603
0603
0603
0603
0603
0603
0805
Shown on silkscreen, but
not used in actual circuit.
CV221-2A WJ Converter
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 Amplifier Matching
50
70
75
100
120
140
155
180
240
18 pF 15 pF 15 pF 8.2 pF 8.2 pF 5.6 pF 5.6 pF 3.9pF 3.0 pF
390 nH 220 nH 220 nH 180 nH 150 nH 150 nH 120 nH 110 nH 82 nH
Specifications and information are subject to change without notice
WJ Communications, Inc • Phone 1-800-WJ1-4401 • FAX: 408-577-6621 • e-mail: [email protected] • Web site: www.wj.com
Page 3 of 5 June 2007
CV221-2A
1.9 – 2.7 GHz Dual-Branch Downconverter
Typical Downconversion Performance Plots
Performance using the circuitry on the CV221-2APCB240 Evaluation Board
Conversion Loss vs RF Frequency vs Temperature
Input IP3 vs RF Frequency vs Temperature
LO = 0 dBm, IF = 240 MHz, low-side LO
10
32
9
30
Input IP3 (dBm)
Conversion Loss (dB)
LO = 0 dBm, IF = 240 MHz, low-side LO
8
7
6
-40 °C
5
1800
1900
2000
+25 °C
2100
28
26
24
+85 °C
2200
-40 °C
22
1800
2300
1900
RF Frequency (MHz)
2000
+25 °C
2100
+85 °C
2200
R-I Isolation vs RF Frequency
L-R Isolation vs LO Frequency
L-I Isolation vs LO Frequency
Referenced with LO = 0 dBm
20
15
10
-40 °C
1950
2000
+25 °C
2050
35
L-I Isolation (dB)
25
5
1900
Referenced with LO = 0 dBm
25
L-R Isolation (dB)
R-I Isolation (dB)
30
20
15
10
5
+85 °C
2100
2150
-40 °C
0
1500
2200
1600
1700
+25 °C
1800
1900
30
25
20
15
+85 °C
2000
-40 °C
10
1500
2100
1600
1800
1900
+85 °C
2000
LO Frequency (MHz)
LO Frequency (MHz)
RF Return Loss vs RF Frequency
LO Return Loss vs Frequency
IF Return Loss vs LO Frequency
-5
-10
-15
-20
1900
+25 °C
2000
2100
+85 °C
2200
2300
0
-5
-10
-15
-20
-40 °C
-25
1500
1600
RF Frequency (MHz)
+25 °C
1700
1800
+85 °C
1900
2100
-10
-15
-20
-40 °C
-25
1500
1600
+25 °C
1700
1800
+85 °C
1900
2000
2100
LO Frequency (MHz)
Noise Figure vs RF Frequency
IF = 240 MHz, low-side LO at 0 dBm
IF = 240 MHz, low-side LO at 0 dBm
14
Noise Figure (dB)
14
Input P1dB (dBm)
2000
-5
LO Frequency (MHz)
Input P1dB vs RF Frequency
12
10
8
6
-40 °C
4
1800
IF Return Loss (dB)
LO Return Loss (dB)
0
-40 °C
2100
IF = 240 MHz, LO = 0 dBm
0
RF Return Loss (dB)
1700
+25 °C
RF Frequency (MHz)
IF = 240 MHz, low-side LO at 0 dBm
-25
1800
2300
RF Frequency (MHz)
1900
+25 °C
2000
2100
RF Frequency (MHz)
12
10
8
6
-40 °C
+85 °C
2200
2300
4
1900
1950
+25 °C
2000
2050
+85 °C
2100
2150
2200
RF Frequency (MHz)
Specifications and information are subject to change without notice
WJ Communications, Inc • Phone 1-800-WJ1-4401 • FAX: 408-577-6621 • e-mail: [email protected] • Web site: www.wj.com
Page 4 of 5 June 2007
CV221-2A
1.9 – 2.7 GHz Dual-Branch Downconverter
CV221-2AF Mechanical Information
This package is lead-free/RoHS-compliant. The plating material on the pins is annealed matte tin over copper. It is compatible with both
lead-free (maximum 260 °C reflow temperature) and leaded (maximum 245 °C reflow temperature) soldering processes.
Product Marking
Outline Drawing
The component will be lasermarked with a
“CV221-2AF” product label with an
alphanumeric lot code on the top surface of the
package.
Tape and reel specifications for this part will be
located on the website in the “Application
Notes” section.
ESD / MSL Information
ESD Rating:
Value:
Test:
Standard:
Class 1B
Passes 500V to <1000V
Human Body Model (HBM)
JEDEC Standard JESD22-A114
ESD Rating:
Value:
Test:
Standard:
Class III
Passes 500V to <1000V
Charged Device Model (CDM)
JEDEC Standard JESD22-C101
MSL Rating: Level 2 at +260 °C convection reflow
Standard:
JEDEC Standard J-STD-020
RF 1
1
INPUT
IF1
OUTPUT
GND
26
AMP1
INPUT
27
GND
MIXER
IF1
28
GND
Mounting Configuration / Land Pattern
GND
Functional Pin Layout
25
24
23
22
IF
RF
21 BIAS
GND 2
20 GND
IF Amp 1
BIAS 3
19 GND
GND 4
LO Driver Amp
17 LO
GND 6
IF Amp 2
16 GND
1
3
5
7
9
15 GND
IF
8
9
10
11
12
13
14
GND
GND
AMP2
INPUT
GND
IF2
OUTPUT
GND
RF
MIXER
IF2
RF 2 7
INPUT
Pin
18 GND
GND 5
Function
Ch. 1 Mixer
RF Input
LO Amp Bias
N/C or GND
Ch. 2 Mixer
RF Input
Ch. 2 Mixer
IF Output
Pin
Function
15
N/C or GND
17
19
LO input
N/C or GND
21
23
11
Ch. 2 IF Amp Input
25
13
Ch. 2 IF Amp
Output / Bias
27
+5 V
Ch. 1 IF Amp
Output / Bias
Ch. 1 IF Amp
Input
Ch. 1 Mixer
IF Output
The even numbered pins are hard grounded to the backside
paddle internally. They can be grounded or not connected.
The backside paddle is required to be grounded.
Specifications and information are subject to change without notice
WJ Communications, Inc • Phone 1-800-WJ1-4401 • FAX: 408-577-6621 • e-mail: [email protected] • Web site: www.wj.com
Page 5 of 5 June 2007
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