2.3 to 2.5 GHz
1 Watt Power Amplifier
August 2007 - Rev 05-Aug-07
CMM2321-AK
Features
48% Power Added Efficiency
31.5 dBm Output Power
Low Distortion
Low Cost SO-8 Surface Mount Package
Functional Block Diagram
V g2
4
Vg1
3
GND
2
RF IN
1
5
RF OUT/Vd2
6
RF OUT/Vd2
7
Vd1
8
N/C
Back plane is ground and
must be soldered to thermally
conductive ground plane.
General Description
The CMM2321 is a power amplifier intended for use in 2.4 GHz ISM
band applications such as wireless datacom equipment, wireless
bar code scanners and inter-building campus networks. This
flexible amplifier can be biased to support the requirements of
frequency hopping or direct sequence systems. The CMM2321 is
packaged in a low-cost, space efficient SO-8 power package that
gives excellent electrical stability and thermal handling
performance with a R of less than 18º C/W. The part is designed
to require minimal external circuitry for bias matching, simplifying
design and keeping board space and cost to a minimum.
Applications
Wireless Datacom
Wireless Bar Code Scanners
Inter-Building Campus Networks
Absolute Maximum Ratings
Parameter
Rating
Parameter
Rating
Parameter
Rating
Drain Voltage (+Vd)
Drain Current (Id)
RF Input Power
DC Gate Voltage (-Vg)
+9.0 V*
1.8 A
+15 dBm*
-4.0 V*
Power Dissipation
Thermal Resistance
Storage Temperature
5W
18°C/W
-65°C to +150°C
Operating Temperature
Channel Temperature
Soldering Temperature
-40°C to +100°C
175°C
260°C for 5 Sec.
* Max (+Vd) and (-Vg) under linear operation. Max potential difference across the device in RF compression (2Vd+ |-Vg|) not to exceed the minimum breakdown voltage (Vbr) of +18V.
Recommended Operating Conditions
Parameter
Typ
Units
Parameter
Typ
Units
Drain Voltage (+Vd)
4.5 to 5.1
Volts
Operating Temperature (PC Board)
-30 to +80
°C
Electrical Characteristics
Parameter
The following specifications are guaranteed at room temperature with drain voltage (+Vd) = 4.8 V @ 2.45 GHz in Celeritek test fixture.
Condition
Min
Typ
Max
Units
Frequency Range
P-1dB
P
OUT
Saturated
Efficiency (PAE)
Gain
Harmonics
Noise Figure
Return Loss
Negative Supply Current (-Ig)
Positive Supply Current (Id)
P
IN
= +14 dBm
@ Saturation
2nd @ Pout = +30 dBm
3rd @ Pout = +30 dBm
2.3
30
31
18
2.5
30.5
31.5
48
20
-35
-40
5.0
10
0.5
675
-30
-35
1.0
@ P-1dB
GHz
dBm
dBm
%
dB
dBc
dBc
dB
dB
mA
mA
Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099
Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com
Page 1 of 4
Characteristic Data and Specifications are subject to change without notice.
©2007
Mimix Broadband, Inc.
Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept
their obligation to be compliant with U.S. Export Laws.
2.3 to 2.5 GHz
1 Watt Power Amplifier
August 2007 - Rev 05-Aug-07
CMM2321-AK
Typical Performance
Gain vs Frequency
22
4.8 V
36
Saturated Power Output vs Frequency
(P IN = +14 dBm)
4.8 V
4.5 V
Power Out, dBm
21
31
3.6 V
26
21
16
2.40
Gain, dB
4.5 V
20
3.6 V
19
18
2.40
2.45
Frequency, GHz
2.50
2.45
Frequency, GHz
2.50
Power Output vs Power Input @ 2.45 GHz
36
Efficiency vs Power Input @ 2.45 GHz
Power Out, dBm
31
75
Efficiency, %
26
4.8 V
21
16
-2
2
6
10
Power Input, dBm
14
50
25
0
0
2
6
10
Power Input, dBm
14
4.8 V
Application Information
The CMM2321 is a two stage amplifier that requires
a positive and negative supply voltage for proper operation. It
is essential when turning on the device that the negative sup-
ply be applied before the positive supply. When turning the
device off, the positive supply should be removed before the
negative supply is removed.
The CMM2321 can be operated over a range of sup-
ply voltages and bias points. It is important that the maximum
power dissipation of the package be observed at all times.
Their placement and value provide tuning. Vd2 is fed through
a /4 trace. All other capacitors shown in the schematic are
used for decoupling.
Note: Circuit board 8251 is a multiple-use test board.
The portions of the board that are used with the CMM2321
are shown as solid traces on the board layout drawing on Page
3. The interface/conversion points in the evaluation board
schematic are shown. These connection points may not be
labeled identically on Mimix’s PB-CMM2321 evaluation
board. Contact the factory for assistance in translating the
external match to a specific application.
Supply Ramping
To obtain the necessary power ramp, sup-
ply side switching should be used. Both drain voltages should
be tied together and ramped to produce the required power vs.
time response.
Thermal
1. The copper pad on the backside of the CMM2321 must be
soldered to the ground plane.
2. All 8 leads of the package must be soldered to the appropri-
ate electrical connection.
3. A large ground plane area with plated thru-holes as shown
on the PCB layout should be used as a backside connection.
Contact the factory for a copy of a manufacturing application
note containing more detailed information.
Page 2 of 4
Design Considerations
Biasing
A negative voltage supply is needed to bias the gates
of the 2-stage GaAs FET power amplifier. Gate 1 bias is
applied through pin 3 (Vg1) and gate 2 bias is applied through
pin 4 (Vg2). Under most operating conditions gates 1 and 2
may be tied together. The positive supply voltage is applied to
pins 5 and 6 (Vd2) and pin 7 (Vd1). The negative voltage
supply should be adjusted to achieve a drain current of 600
mA with no RF input power to obtain a P1dB of approximate-
ly 30.5 dBm.
Matching Circuits
Input and output matching circuits are
required. The schematic and the PCB layout for the test board
are shown on Page 3. The matching circuits for the
CMM2321 are highlighted on the PCB layout.
A single shunt capacitor is used to match the output.
Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099
Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com
Characteristic Data and Specifications are subject to change without notice.
©2007
Mimix Broadband, Inc.
Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept
their obligation to be compliant with U.S. Export Laws.
2.3 to 2.5 GHz
1 Watt Power Amplifier
August 2007 - Rev 05-Aug-07
CMM2321-AK
Test Circuits
Evaluation Board Schematic
Board substrate:
ER = 4.60
Thickness = 0.031 in.
Transmission
line electrical
lengths at 2.45 GHz.
(Dimensions in inches)
Line
T1
T2
T3
T4
T5
Z (Ø)
104
104
50
53
91
E ( °)
14
19
11
31
82
-V gg
C13
.01 µF
C6
100 pF
RF OUT
(50 )
C11
0.01 µF
C8
100 pF
C12
0.01 µF
T4
C4
2.2 pF
T3
C5
0.5 pF
RF IN
(50 )
C1
3.9 pF
T1
C2
0.5 pF
T2
4
3
2
1
5
6
7
8
T5
C10
100 pF
C14
.01 µF
C15
2.2 µF
C7
100 pF
Vdd
C9
100 pF
NC
C3
1.8 pF
CMM2321-AK
R1
51K
PB-CMM2321 Evaluation Board
Ground
-Vgg (Vg1, Vg2)
RF OUT
RF IN
Vdd (Vd1, Vd2)
Ground
Evaluation Board Parts List
Part Type
Reference Designator
Description
Manufacturer
Part Number
Resistor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
Capacitor
R1
C1
C2, C5
C3
C4
C6, C7, C8, C9, C10
C11, C12, C13, C14
C15
51 K 0603
3.9 pF 0805 NPO
0.5 pF 0805 NPO
1.8 pF 0805 NPO
2.2 pF 0805 NPO
100 pF 0603 NPO
0.01 µF 0805 X7R
2.2 µF Tantalum
Rohm
Rohm
Rohm
Rohm
Rohm
Rohm
Rohm
Matsuo
MCR 03J 513
MCH 185 A3R9CK
MCH 185 A0R5CK
MCH 185 A1R8CK
MCH 185 A2R2CK
MCH 185 A101JK
MCH 215 C103KK
267 M2002225M
Page 3 of 4
Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099
Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com
Characteristic Data and Specifications are subject to change without notice.
©2007
Mimix Broadband, Inc.
Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept
their obligation to be compliant with U.S. Export Laws.
2.3 to 2.5 GHz
1 Watt Power Amplifier
August 2007 - Rev 05-Aug-07
CMM2321-AK
Connection Diagram and Pin Descriptions
Pin #
1
2
3
4
5
6
7
8
Name
RF IN
GND
Vg1
Vg2
RF OUT/Vd2
RF OUT/Vd2
Vd1
N/C
Description
RF input (internally DC blocked)
Ground
Input stage gate bias
Output stage gate bias
RF output and Vd2. External matching cir-
cuit required
RF output and Vd2. External matching cir-
cuit required
Input stage drain bias
Ground this pin
Vg2
Vg1
GND
MATCH
4
3
2
1
5
6
7
8
N/C
MATCH
Vd2
RF OUT
Vd1
RF IN
Physical Dimensions
Ordering Information
Part Number for Ordering
CMM2321-AK
CMM2321-AK-000T
PB-CMM2321-AK
The CMM2321 is available in a surface mount SO-8 power package and devices are available in tape and reel.
Package
SO-8 surface mount power package
SO-8 surface mount power package in tape and reel
Evaluation Board with SMA connectors
Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099
Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com
Page 4 of 4
Characteristic Data and Specifications are subject to change without notice.
©2007
Mimix Broadband, Inc.
Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept
their obligation to be compliant with U.S. Export Laws.
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