RF5117C [RFMD]
3V, 1.8GHz TO 2.8GHz LINEAR POWER AMPLIFIER; 3V ， 1.8GHz的至2.8GHz线性功率放大器
| 型号： | RF5117C |
| 厂家： | 
RF MICRO DEVICES |
| 描述： | 3V, 1.8GHz TO 2.8GHz LINEAR POWER AMPLIFIER |
| 文件： | 总12页 (文件大小：275K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
RF5117C
3V, 1.8GHz TO 2.8GHz
LINEAR POWER AMPLIFIER
0
Typical Applications
• IEEE802.11B WLAN Applications
• IEEE802.11G WLAN Applications
• 2.5GHz ISM Band Applications
• Commercial and Consumer Systems
• Portable Battery-Powered Equipment
• Spread-Spectrum and MMDS Systems
Product Description
0.15
2 PLCS
C
A
0.05 C
-A-
1.00
0.85
3.00 SQ.
0.05
0.01
The RF5117C is a linear, medium-power, high-efficiency
amplifier IC designed specifically for battery-powered
WLAN applications such as PC cards, mini PCI, and
compact flash applications. The device is manufactured
on an advanced Gallium Arsenide Heterojunction Bipolar
Transistor (HBT) process, and has been designed for use
as the final RF amplifier in 2.5GHz WLAN and other
spread-spectrum transmitters. The device is provided in a
3mmx3mm, 16-pin, leadless chip carrier with a backside
ground. The RF5117C is designed to maintain linearity
over a wide range of supply voltage and power output.
1.50 TYP
0.80
0.65
2 PLCS
0.15
C B
12°
MAX
2 PLCS
C B
0.15
-B-
1.37 TYP
SEATING
PLANE
-C-
Dimensions in mm.
2.75 SQ.
2 PLCS
0.15
C
A
B
C A
0.10 M
0.60
0.24
TYP
0.30
0.18
Shaded lead is pin 1.
0.45
0.00
4 PLCS
1.65
1.35
SQ.
0.23
0.13
0.55
0.30
4 PLCS
0.50
Optimum Technology Matching® Applied
Package Style: QFN, 16-Pin, 3x3
Si BJT
GaAs HBT
SiGe HBT
GaN HEMT
GaAs MESFET
9
Si Bi-CMOS
InGaP/HBT
Si CMOS
Features
SiGe Bi-CMOS
• Single 3.3V Power Supply
• +30dBm Saturated Output Power
• 26dB Small Signal Gain
16
15
14
13
• High Linearity
RF IN
1
2
3
4
12 RF OUT
11 RF OUT
10 RF OUT
• 1800MHz to 2800MHz Frequency Range
BIAS GND1
PWR SEN
PWR REF
• +17dBm P , 11G, <3% EVM
O
Bias
9
NC
Ordering Information
5
6
7
8
RF5117C
3V, 1.8GHz to 2.8GHz Linear Power Amplifier
RF5117C PCBA Fully Assembled Evaluation Board
RF Micro Devices, Inc.
Tel (336) 664 1233
7628 Thorndike Road
Greensboro, NC 27409, USA
Fax (336) 664 0454
http://www.rfmd.com
Functional Block Diagram
Rev A5 060517
2-573
RF5117C
Absolute Maximum Ratings
Parameter
Supply Voltage
Refer to “Handling of PSOP and PSSOP Products”
on page 16-15 for special handling information.
Rating
-0.5 to +6.0
-0.5 to 3.5
Unit
V
DC
Power Control Voltage (V
)
V
REG
DC Supply Current
Input RF Power
Operating Ambient Temperature
Storage Temperature
600
+10
-40 to +85
-40 to +150
JEDEC Level 2
mA
dBm
°C
Caution! ESD sensitive device.
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).
°C
Moisture Sensitivity
Specification
Parameter
Overall
Unit
Condition
Min.
Typ.
Max.
T=25 °C, V =3.0V, V
=2.7V,
CC
REG
Freq=2450MHz, circuit per evaluation board
schematic.
Frequency Range
1800 to 2800
MHz
Maximum Linear Output Power
With 802.11B modulation (11Mbit/s) and
meeting 802.11B spectral mask.
VCC=3.0V
VCC=5.0V
22
27
25
2.5
dBm
dBm
%
Linear Efficiency
Error Vector Magnitude (EVM)
%
P =17dBm, EVM increases over 11g,
O
54MBPS signal input
Small Signal Gain
24
30
26
28.5
dB
P =-7dBm
IN
Reverse Isolation
Second Harmonic
802.11B Adjacent Channel
Power
dB
dBc
dBc
-35
-38
-32
-52
P
=21dBm, V =3.0V
OUT CC
Alternate Channel Power
-56
45
dBc
dB
Ω
P
=21dBm, V =3.0V
OUT CC
Isolation
35
In “OFF” state, P =-5.0dBm
IN
Input Impedance
Input VSWR
50
2:1
With external matching
With external matching
Power Down
V
“ON”
2.1
2.7
0
3.0
0.5
V
V
Voltage supplied to control input; device is
“ON”
Voltage supplied to control input; device is
“OFF”
REG
V
“OFF”
REG
Power Supply
Operating Voltage
Current Consumption
3.0 to 5.0
500
V
mA
mA
At max output power
200
220
P
=21dBm, V =3.0V
OUT CC
110
5
mA
mA
mA
Idle current, V =3.0V, V
=2.7V
CC
REG
V
Current (Total)
10
15
V
V
=3.0V
=5.0V
REG
CC
CC
10
2-574
Rev A5 060517
RF5117C
Pin
1
Function Description
Interface Schematic
RF input. Matching network with DC block required, see evaluation
RF IN
VCC
board schematic for details.
Bond Wire
Inductance
RF IN
BIAS
Ground for first stage bias circuit. Not connected.
See pin 5.
2
3
BIAS GND1
PWR SEN
The PWR SEN and PWR REF pins can be used in conjunction with an
external feedback path to provide an RF power control function for the
RF5117C. The power control function is based on sampling the RF
drive to the final stage of the RF5117C.
RF OUT
PWR SEN
PWR REF
BIAS
Same as pin 3.
See pin 3.
4
5
PWR REF
VREG1
This pin requires a regulated supply to maintain nominal bias current.
VREG1
BIAS
VREG2
BIAS
BIAS
GND1
GND2
Same as pin 5.
See pin 5.
6
7
VREG2
BIAS GND2
Ground for second stage bias circuit. For best performance connect to See pin 5.
ground with a 10nH inductor.
Not connected.
Not connected.
8
9
NC
NC
RF output and bias for the output stage. The power supply for the out-
put transistor needs to be supplied to this pin. This can be done
through a quarter-wave length microstrip line that is RF grounded at the
other end, or through an RF inductor that supports the required DC cur-
rents.
10
RF OUT
RF OUT
BIAS
Same as pin 10.
Same as pin 10.
See pin 10.
See pin 10.
See pin 1.
11
12
13
RF OUT
RF OUT
VCC
Interstage match and bias for first stage output. Connect interstage
matching capacitor to this pad with a short trace. Connect low-fre-
quency bypass capacitors to this pin with a long trace. See evaluation
board layout for details.
Same as pin 13.
Not connected.
Not connected.
See pin 1.
14
15
16
VCC
NC
NC
Ground connection. The backside of the package should be connected
to the ground plane through a short path, i.e., vias under the device will
be required.
Pkg
Base
GND
Rev A5 060517
2-575
RF5117C
Theory of Operation and Application Information
The RF5117C is a two-stage device with a nominal gain of 26dB in the 2.4GHz to 2.5GHz ISM band. The RF5117C is
designed primarily for IEEE802.11B/11G WLAN applications where the available supply voltage and current are limited.
This amplifier will operate to (and below) the lowest expected voltage made available by a typical PCMCIA slot in a lap-
top PC, and will maintain required linearity at decreased supply voltages.
The RF5117C requires only a single positive supply of 3.0V nominal (or greater) to operate to full specifications. Power
control is provided through two bias control input pins (VREG1 and VREG2), but in most applications these are tied
together and used as a single control input.
There is some external matching on the input and output of the part, thus allowing the part to be used in other applica-
tions outside the 2.4GHz to 2.5GHz ISM band (such as MMDS). Both the input and the output of the device need a
series DC-blocking capacitor. In some cases, a capacitor used as a matching component can also serve as the blocking
cap. The circuit used on the evaluation board is optimized for 3.0V nominal applications.
For best results, the PA circuit layout from the evaluation board should be copied as closely as possible, particularly the
ground layout and ground vias. Other configurations may also work, but the design process is much easier and quicker if
the layout is copied from the RF5117C evaluation board. Gerber files of our designs can be provided upon request.
The RF5117C is not a difficult part to implement, but care in circuit layout and component selection is always advisable
when designing circuits to operate at 2.5GHz. The most critical passive components in the circuit are the input, inter-
stage and output matching components (C1, C5, and C11). In these cases, high-Q capacitors suitable for RF applica-
tions are used on our evaluation board (a BOM is available on request). High-Q parts are not required in every design,
but it is very strongly recommended that the original design be implemented with the same or similar parts used on our
evaluation board. Then, less costly components can be substituted in their place, making it easy to test the impact of
cheaper components on performance. General RFMD experience has indicated that the slightly higher cost of better
quality passive components is more than offset by the significant improvements in production yields in large-volume
manufacturing. Using less costly components will typically result in a 1 to 2dB degradation in gain.
The interstage matching capacitor, C11, along with the combined inductance of the internal bond wire, the short length
of circuit board trace, and the parasitic inductance of this capacitor, tunes the peak of the small-signal gain response.
The trace length between C11 and pins 13 and 14 should be kept as short as possible.
In practice, VCC and the supply for the output stage bias will be tied to the same supply. It is important to isolate C11 from
other RF and low-frequency bypass capacitors on this supply line. This can be accomplished using a suitably long trans-
mission line which is RF shorted on the other end. Ideally the length of this line will be a quarter wavelength, but it only
needs to be long enough so that the effects of other supply bypass capacitors on the interstage match are minimized. If
board space is a concern, this isolation can also be accomplished with an RF choke inductor or ferrite bead. Additionally,
a higher-value capacitor than shown on the application schematic can be used if bypass capacitors must be closer. A
Smith Chart can be used to provide initial guidance for value selection and parts placement. Be aware of the self-reso-
nant frequency (SRF) of higher-valued capacitors. The SRF must be above the frequency of operation.
The output matching capacitor is C5, located 130mils from the IC (this distance should be duplicated as closely as pos-
sible). Due to variations in FR-4 characteristics and PCB manufacturer process variations, some benefit will be obtained
from small adjustments to these transmission line lengths when the evaluation board layout is duplicated on another
design. Prior to full rate manufacturing, the board layout of early prototypes should include some additional exposed
ground areas around C5 to optimize this part of the circuit. A Smith Chart can help determine the desired value and
transmission line length, which can be similarly adjusted on the board prior to production.
2-576
Rev A5 060517
RF5117C
The RF5117C can be used with an IEEE802.11g modulation with a few modifications. Pin 2 should not be connected to
ground and a 4.7kΩ resistor should be placed on the VREG1 line. This is done on the evaluation board by cutting the
VREG1 trace and placing the resistor on the open line. All other components should not be modified and the IEEE802.11g
schematic should be followed as closely as possible.
Power sensing is implemented with the PWR SEN and PWR REF lines. The outputs of these pins are transistor collec-
tors and need to be pulled up to the supply through a resistor. PWR REF provides an output current proportional to the
output stage bias current, and PWR SEN provides an output current proportional to the total (RF and bias) current of the
output stage. The pull-up resistors convert these currents to voltages, and the voltage difference between these two pins
is proportional to the RF current. See the graph, “VREF-VSENSE versus POUT”, for the response of this signal. This differ-
ence signal can be fed to a power control circuit elsewhere in the end product, or it can be processed at the PA with addi-
tional circuitry and used to adjust the VREG voltage(s) to implement automatic level control. Contact RFMD Sales or
Applications Engineering for additional data and guidance in using this feature.
The RF5117C has primarily been characterized with a voltage on VREG1 and VREG2 of 2.7VDC. However, the RF5117C
will operate from a wide range of control voltages. If you prefer to use a control voltage that is significantly different than
2.7VDC, contact RFMD Sales or Applications Engineering for additional data and guidance.
Rev A5 060517
2-577
RF5117C
Evaluation Board Schematic - IEEE802.11b
2400MHz to 2483MHz
VCC
C23
1 μF
C14
1 nF
C22
10 μF
C12
1 nF
Part is Backside Grounded.
*2
C11
6.8 pF
JOH
C10
1 nF
L3
1.2 nH
Murata
C9
10 pF
L1
12 nH
C1
10 pF
16
15
14
13
50 Ω μstrip
J1
RF IN
1
2
3
4
12
11
10
9
TL1 = 130 mil (50 Ω)
C17
2.7 pF
JOH
TL1
C5
R2
390 Ω
J2
RF OUT
50 Ω μstrip
C8
10 pF
2.7 pF
JOH
R1
390 Ω
*1
Bias
C2
1 nF
C15
1 nF
5
6
7
8
5117400B
L2
PWR SENSE
PS REF
10 nH
P1
1
P2
1
C16
1 nF
C3
1 nF
C13
1 nF
P1-1
P1-2
PS REF
PWR SENSE
GND
GND
GND
VCC
2
2
3
P2-3
3
VREG1 VREG2
Notes:
1. C7 - 130 mils from chip.
2. Place C11 as close to chip as possible.
P1-4
P1-5
VREG1
VREG2
CON3
4
5
P3
1
P3-1
VCC
GND
CON5
CON1
P4
1
CON1
2-578
Rev A5 060517
RF5117C
Evaluation Board Schematic - IEEE802.11g
2400MHz to 2483MHz
C23
1 μF
VCC
C14
1 nF
C22
10 μF
C12
1 nF
Place C11 as close
to chip as possible
Part is Backside Grounded.
*3
C11
6.8 pF
JOH
C10
1 nF
L3
1.2 nH
Murata
C9
10 pF
L1
12 nH
C1
10 pF
16
15
14
13
50 Ω μstrip
J1
RF IN
1
2
3
4
12
11
10
9
TL1 = 130 mil (50 Ω)
C17
2.7 pF
JOH
TL1
C5
R2
390 Ω
J2
RF OUT
*2
50 Ω μstrip
C8
10 pF
2.7 pF
JOH
R1
390 Ω
*1
Bias
C2
1 nF
C15
1 nF
5
6
7
8
5117400B
L2
PWR SENSE
PS REF
10 nH
P1
1
P2
1
C16
1 nF
C3
1 nF
C13
1 nF
P1-1
P1-2
PS REF
PWR SENSE
GND
GND
GND
VCC
2
2
R3
4.3 kΩ
*4
3
P2-3
3
Notes:
1. C7 - 130 mils from chip.
2. Pin 2 cut from ground.
3. C11 must be placed as close to chip as possible.
4. The VREG trace is cut and a 4.7 kΩ resistor is
placed on the trace.
P1-4
P1-5
VREG1
VREG2
CON3
4
5
VREG1 VREG2
P3
1
P3-1
VCC
GND
CON5
CON1
P4
1
CON1
Rev A5 060517
2-579
RF5117C
Evaluation Board Layout
Board Size 1.5” x 2.0”
Board Thickness 0.031”, Board Material FR-4, Multi-Layer
2-580
Rev A5 060517
RF5117C
ICQ, ICC, POUT versus VREG (Typical)
VCC = 3.0, PIN = -5.0 dBm
IREG, POUT versus VREG (Typical)
VCC = 3.0, PIN = -5.0 dBm
200.0
180.0
160.0
140.0
120.0
100.0
80.0
25.0
20.0
15.0
10.0
5.0
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
25.0
20.0
15.0
10.0
5.0
0.0
0.0
-5.0
-5.0
60.0
-10.0
-15.0
-20.0
-25.0
-10.0
-15.0
-20.0
-25.0
40.0
Icq
Icq
Icc
20.0
Pout
Pout
0.0
1.0
1.5
2.0
2.5
3.0
1.0
1.5
2.0
2.5
3.0
VREG1 , VREG2 (VDC
)
VREG1 , VREG2 (VDC)
*
*
Marker
1
[T1]
22.01 dBm
2.441839744 GHz
802.11B, 5117 proto
RBW 100 kHz
VBW 30 kHz
SWT 35 ms
802.11B, 5117 proto
* RBW 100 kHz
* VBW 30 kHz
SWT 35 ms
Marker 1 [T1]
Ref
30
30 dBm
Offset
Ref
30
30 dBm
Offset
Att
40 dB
2.441839744 GHz
Delta [T1]
-42.31 dB
11.723076923 MHz
Delta [T1]
-58.92 dB
-23.900000000 MHz
18.8 dB
Delta
2
[T1]
-40.55 dB
11.723076923 MHz
Delta [T1]
-56.56 dB
-23.900000000 MHz
18.8 dB
2
1
A
1
20
20
IFOVL
RM *
IFOVL
RM *
AVG
3
3
1
1
AVG
10
10
LVL
LVL
PRN
0
0
-10
-20
-10
-20
-30
PRN
2
2
SWP
20 of
20
SWP
20 of
20
-30
3
3
-40
-50
-40
-50
-60
-70
-60
-70
Center 2.442 GHz
5
MHz/
Span 50 MHz
5
MHz/
Center 2.442 GHz
Span 50 MHz
Comment A:
Date:
8
MHz int LPF's, Vcc=3.0 Vreg= 2.7, 200 mA
Comment A:
Date:
8
MHz int LPF's, Vcc=Vreg= 2.7, 150 mA
26.SEP.2001 01:10:29
26.SEP.2001 01:11:53
Spectral Plot: VCC=3.0V, VREG1=VREG2=2.7VSpectral Plot: VCC=2.7V, VREG1=VREG2=2.7V
POUT=22.05dBm, PIN=-4.1dBm, ICC~200mAPOUT=19.05dBm, PIN=-6.8dBm, ICC~150mA
Rev A5 060517
2-581
RF5117C
VREF-VSENSE versus POUT
0.5
0.0
-0.5
-1.0
-1.5
-2.0
-2.5
-15.0
-10.0
-5.0
0.0
5.0
10.0
15.0
20.0
25.0
30.0
POUT
2-582
Rev A5 060517
RF5117C
EVM versus POUT (11g Tuned PA)
VCC = 3.0V, Gain = 23dB
EVM versus POUT (11g Tuned PA)
VCC = 3.3V, Gain = 23dB
140
120
100
80
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
140.0
120.0
100.0
80.0
60.0
40.0
20.0
0.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
Icc(mA)2.4Vreg
Icc(mA)2.5Vreg
Icc(mA)2.6Vreg
Icc(mA)2.7Vreg
EVM%2.4Vreg
EVM%2.5Vreg
EVM%2.6Vreg
EVM%2.7Vreg
60
Icc(mA)2.4Vreg
Icc(mA)2.5Vreg
Icc(mA)2.6Vreg
Icc(mA)2.7Vreg
EVM%2.4Vreg
EVM%2.5Vreg
EVM%2.6Vreg
EVM%2.7Vreg
40
20
0
14
14.5
15
15.5
16
16.5
17
17.5
18
15.5
16.0
16.5
17.0
17.5
18.0
18.5
19.0
POUT (dBm)
POUT (dBm)
ICC and Gain for 11b Waveform
in 11g Tuned PA
Gain versus VREG
for 11g Tuned PA
25
24.5
24
250
240
230
220
210
200
190
180
170
160
150
25
24.5
24
23.5
23
23.5
23
22.5
22
22.5
22
21.5
21
Gain (3V, Po=22.5dBm)
Gain (3.3V, Po=23dBm)
Icc (3V, Po=22.5dBm)
Icc (3.3V, Po=23dBm)
Gain- (VCC=3V)
21.5
21
20.5
20
Gain- (VCC=3.3V)
2.2
2.4
2.6
2.8
3
3.2
3.4
2.3
2.4
2.5
2.6
2.7
2.8
VREG (V)
VREG (V)
Evaluation Board with 11g Tuning
Rev A5 060517
2-583
RF5117C
2-584
Rev A5 060517
相关型号：
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