RFMD RF2609

RF2609
10
CDMA/FM TRANSMIT AGC AMPLIFIER
Typical Applications
• CDMA/FM Cellular Systems
• General Purpose Linear IF Amplifier
• Supports Dual-Mode AMPS/CDMA
• Portable Battery Powered Equipment
• Supports Dual-Mode TACS/CDMA
• Commercial and Consumer Systems
.157
.150
.009
1
.196
.189
.244
.228
GaAs HBT
SiGe HBT
F2
.050
.016
Si CMOS
ro
P
CDMA+ 1
GAIN
CONTROL
1 6 GC
1 5 VCC
GND 3
1 4 VCC
GND 4
1 3 VCC
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CDMA- 2
GND 5
10
Package Style: SSOP-16
Features
• Supports Dual Mode Operation
• -48dB to +42dB Gain Control Range
• IS-95 CDMA Compatible
• Monolithic Construction
• 12MHz to 175MHz Operation
• Miniature Surface Mount Package
1 2 GND
GND 6
1 1 GND
GND 7
1 0 OUT+
NC 8
9 OUT-
Functional Block Diagram
Rev B3 000822
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.008
GaAs MESFET
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Si Bi-CMOS
.069
.053
IF AMPLIERS
!Si BJT
.012
.008
8°MAX
0°MIN
s
Optimum Technology Matching® Applied
.010
.004
.025
R
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The RF2609 is a complete AGC amplifier designed for
the transmit section of dual-mode CDMA/FM cellular
applications. It is designed to amplify IF signals while providing more than 84dB of gain control range. Noise Figure, IP3, and other specifications are designed to be
compatible with the IS-95 Interim Standard for CDMA cellular communications. This circuit is designed as part of
the RFMD CDMA Chip Set, consisting of this Transmit IF
AGC Amp, a Transmit Upconverter, a Receive LNA/Mixer,
and a Receive IF AGC Amp. The IC is manufactured on
an advanced high frequency Silicon Bipolar process and
is packaged in a standard miniature 16-lead plastic SSOP
package.
9
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Product Description
Ordering Information
RF2609
RF2609 PCBA
CDMA/FM Transmit AGC Amplifier
Fully Assembled Evaluation Board
RF Micro Devices, Inc.
7625 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
10-9
RF2609
Absolute Maximum Ratings
Parameter
Supply Voltage
Control Voltage
Input Power Levels
Operating Ambient Temperature
Storage Temperature
Unit
VDC
V
dBm
°C
°C
Specification
Min.
Typ.
Max.
RF Micro Devices believes the furnished information is correct and accurate
at the time of this printing. However, RF Micro Devices reserves the right to
make changes to its products without notice. RF Micro Devices does not
assume responsibility for the use of the described product(s).
Unit
Condition
T=25°C, 130MHz, VCC =3.6V, ZS =1kΩ,
ZL =1kΩ, 1kΩ External Output Terminating
Resistor (Effective ZL =500Ω) (See Application Example)
Overall
10:1
3.3 to 3.6
23
22
25
V
mA
mA
VGC =2.76V
VGC =0.2V
Measured in 0.5V increments
At maximum gain and 130MHz
At +10 gain and referenced to 1kΩ
Differential
Spurious<-70dBm
Maximum gain
Minimum gain
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Voltage
Current Consumption
Current Consumption
-26
-45
MHz
dB
dB
dB/V
VDC
kΩ
dB
dBm
kΩ
F2
Power Supply
12 to 175
+42
-48
47
0 to 3
30
10
-25
1
+39
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s
Frequency Range
Maximum Gain
Minimum Gain
Gain Slope
Gain Control Voltage Range
Gain Control Input Impedance
Noise Figure
Input IP3
Input Impedance
Stability (Max VSWR)
10
Caution! ESD sensitive device.
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Parameter
Rating
-0.5 to +7.0
-0.5 to +5.0
+10
-40 to +85
-40 to +150
10-10
Rev B3 000822
RF2609
4
5
6
7
8
GND
GND
GND
GND
NC
9
OUT-
10
11
12
13
OUT+
GND
GND
VCC
14
15
16
VCC
VCC
GC
Same as pin 2, except complementary input.
VCC
580 Ω
580 Ω
CDMA+
CDMA-
See pin 1 schematic.
Ground connection. Keep traces physically short and connect immediately to ground plane for best performance.
Same as pin 3.
Same as pin 3.
Same as pin 3.
Same as pin 3.
D
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S
9
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S
9
CDMAGND
Interface Schematic
CDMA Balanced Input Pin. This pin is internally DC biased and should
be DC blocked if connected to a device with a DC level, other than VCC,
present. A DC to connection to VCC is acceptable. For single-ended
input operation, one pin is used as an input and the other CDMA input
is AC coupled to ground. The balanced input impedance is 1kΩ, while
the single-ended input impedance is 500Ω.
No Connection pin. This pin is internally biased and should not be connected to any external circuitry, including ground or VCC.
Balanced Output pin. This is an open-collector output, designed to
operate into a 500Ω balanced load. The load sets the operating impedOUT+
OUTance, but an external choke or matching inductor to VCC must also be
supplied in order to correctly bias this output. This bias inductor is typically incorporated in the matching network between the output and next
stage. Because this pin is biased to VCC, a DC blocking capacitor must
be used if the next stage’s input has a DC path to ground.
Same as pin 9, except complementary output.
See pin 9 schematic.
Same as pin 3.
Same as pin 3.
Supply Voltage pin. External bypassing is required. The trace length
between the pin and the bypass capacitors should be minimized. The
ground side of the bypass capacitors should connect immediately to
ground plane. Pins 13, 14, and 15 may share one bypass capacitor if
trace lengths are kept minimal.
Same as pin 13.
10
IF AMPLIERS
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3
Description
F2
Function
CDMA+
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Pin
1
Same as pin 13.
VCC
12.7 kΩ
23.5 kΩ
15 kΩ
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Analog gain adjustment for all amplifiers. Valid control ranges are from
0V to 3.0V. Maximum gain is selected with 3.0V. Minimum gain is
selected with 0V. These voltages are valid only for a 3.3kΩ DC source
impedance.
Rev B3 000822
10-11
RF2609
Application Schematic
Measurement
Reference Plane
ZS=1 kΩ
10 nF
IN+
3.3 kΩ
1
GAIN
CONTROL
10 nF
IN-
GAIN
16
2
15
3
14
10 nF
ZIN=1 kΩ
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9
10 nF
4
13
VCC
5
12
6
11
C1
ZLOAD=1 kΩ
L1
C2
7
10
8
R2:
1 kΩ
L1
OUT-
ZOUT=1 kΩ
VCC
Measurement
Reference Plane
10 nF
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R2 sets the balanced output impedance to 1 kΩ. L1 and C2
serve dual purposes. L1 serves as an output bias choke,
and C2 serves as a series DC block. In addition, the values
of L1 and C2 may be chosen to form an impedance
matching network if the load impedance is not 1kΩ.
Otherwise, the values of L1 and C1 are chosen to form a
parallel-resonant tank circuit at the IF when the IF filter's
input impedance is 1 kΩ.
C1
OUT+
C2
9
ZLOAD,EFF =500 Ω
CDMA Filter
10-12
Rev B3 000822
RF2609
Evaluation Board Schematic
(Download Bill of Materials from www.rfmd.com.)
T1
C1
5.1 pF
C3
0.01 µF
C2
5.1 pF
C4
0.01 µF
L2
270 nH
L1
270 nH
P1
P1-1
P1-3
R1
3.3 kΩ
1
2
15
3
14
4
13
5
12
6
1
VCC
2
GND
3
GC
GAIN
CONTROL
16
7
8
P1-3
C12
0.01 µF
P1-1
C10
0.01 µF
C11
0.01 µF
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CDMA
50 Ω µstrip
SMA
J1
L4
100 nH
11
10
9
C8
36 pF
L3
100 nH
C5
36 pF
OUT
50 Ω µstrip
SMA
J2
C7
20 pF
C6
0.01 µF
P1-1
F2
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2609400A
R2
1kΩ
C9
20 pF
T2
WB3040
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10
Rev B3 000822
10-13
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IF AMPLIERS
RF2609
Evaluation Board Layout
10-14
Rev B3 000822
RF2609
RF2609 OIP3 vs. Gain
(Vcc=3.6 V, 130 MHz)
RF2609 Gain vs. Gain Control Voltage
(Vcc=3.6 V, 130 MHz)
60
20
50
+25°C
40
-30°C
30
+80°C
10
0
+25 C
+85 C
-10
OIP3 (dB)
20
Gain (dB)
-30 C
10
0
-10
-20
-30
-40
-30
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-20
-50
-40
-60
-50
-70
-60
0.0
0.5
1.0
1.5
2.0
2.5
-40.0
-20.0
0.0
20.0
40.0
60.0
Gain (dB)
GC (volts)
RF2609 IIP3 vs. Gain
(Vcc=3.6 V, 130 MHz)
10
-60.0
3.0
RF2609 Noise Figure vs. Gain
(Vcc=3.6 V, 130 MHz)
80
-30 C
0
+25 C
70
40
F2
10
30
R
-30
-50
-60.0
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-40
-40.0
-20.0
0.0
40.0
10
0
60.0
-60
-40
RF2609 Gain vs. Gain Control Voltage
(Vcc=3.3 V, 130 MHz)
60
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40
40
60
40.0
60.0
-30 C
+25 C
85 C
-10
OIP3 (dB)
pg
10
20
0
+85 C
20
Gain (dB)
10
+25 C
30
0
RF2609 OIP3 vs. Gain
(Vcc=3.3 V, 130 MHz)
20
-30 C
50
-20
Gain (dB)
P
Gain (dB)
20.0
20
0
-10
-20
-20
-30
-40
-30
-50
-40
-60
-50
-60
-70
0.0
0.5
1.0
1.5
GC (volts)
Rev B3 000822
2.0
2.5
3.0
-60.0
-40.0
-20.0
0.0
20.0
Gain (dB)
10-15
IF AMPLIERS
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50
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IIP3 (dB)
-20
Noise Figure (dB)
60
+80 C
-10
RF2609
RF2609 IIP3 vs. Gain
(Vcc=3.3 V, 130 MHz)
10
-30 C
0
+25 C
+85 C
IIP3 (dB)
-10
-20
-40
-50
-60.0
-40.0
-20.0
0.0
20.0
40.0
60.0
F2
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Gain (dB)
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-30
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IF AMPLIERS
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10
10-16
Rev B3 000822