RF5122 [RFMD]
3V TO 4.5V, 2.4GHz TO 2.5GHz LINEAR POWER AMPLIFIER; 3V至4.5V ， 2.4GHz至2.5GHz线性功率放大器
| 型号： | RF5122 |
| 厂家： | 
RF MICRO DEVICES |
| 描述： | 3V TO 4.5V, 2.4GHz TO 2.5GHz LINEAR POWER AMPLIFIER |
| 文件： | 总12页 (文件大小：272K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
RF5122
3V TO 4.5V, 2.4GHz TO 2.5GHz
LINEAR POWER AMPLIFIER
RoHS Compliant & Pb-Free Product
Package Style: QFN, 8-Pin, 2.2mmx2.2mmx0.6mm
8
7
Features
RF IN
VREG
1
2
6
5
VC2
Single Power Supply 3.0V to
3.6V
Input
Match
Interstage
Match
Output
Match
24dB Minimum Gain
Input and Output Matched to
50Ω
Power
Detector
RF OUT
Bias Circuit
2400MHz to 2500MHz Fre-
quency Range
3
4
+18dBm @ <2.5% typ EVM,
120mA @ 3.3V
CC
Applications
IEEE802.11b/g/n WLAN
Applications
Functional Block Diagram
2.5GHz ISM Band Applica-
tions
Product Description
The RF5122 is a linear, medium-power, high-efficiency, two-stage 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
InGaP Gallium Arsenide Heterojunction Bipolar Transistor (HBT) process, and has
been designed for use as the final RF amplifier in 2.5GHz OFDM and other spread-
spectrum transmitters. The device is provided in a 2.2mmx2.2mm, 8-pin, QFN with
a backside ground. The RF5122 is designed to maintain linearity over a wide range
of supply voltages and power outputs. The RF5122 also has built-in power detector
and incorporates the input, interstage, and output matching components internally
which reduces the component count used externally and makes it easier to incorpo-
rate on any design.
Commercial and Consumer
Systems
Portable Battery-Powered
Equipment
Spread-Spectrum and MMDS
Systems
Ordering Information
RF5122
3V to 4.5V, 2.4GHz to 2.5GHz Linear Power Amplifier
RF5122PCBA-41X Fully Assembled Evaluation Board
Optimum Technology Matching® Applied
GaAs HBT
GaAs MESFET
InGaP HBT
SiGe BiCMOS
Si BiCMOS
SiGe HBT
GaAs pHEMT
Si CMOS
Si BJT
GaN HEMT
9
RF MICRO DEVICES®, RFMD®, Optimum Technology Matching®, Enabling Wireless Connectivity™, PowerStar®, POLARIS™ TOTAL RADIO™ and UltimateBlue™ are trademarks of RFMD, LLC. BLUETOOTH is a trade-
mark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks and registered trademarks are the property of their respective owners. ©2006, RF Micro Devices, Inc.
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Rev A5 DS070517
1 of 12
RF5122
Absolute Maximum Ratings
Parameter
Supply Voltage
Rating
-0.5 to +5.0
-0.5 to 3.5
Unit
V
DC
Caution! ESD sensitive device.
The information in this publication is believed to be accurate and reliable. How-
ever, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use,
nor for any infringement of patents, or other rights of third parties, resulting
from its use. No license is granted by implication or otherwise under any patent
or patent rights of RFMD. RFMD reserves the right to change component cir-
cuitry, recommended application circuitry and specifications at any time without
prior notice.
Power Control Voltage (V
)
V
REG
DC Supply Current
Input RF Power
400
+5
mA
dBm
°C
Operating Ambient Temperature
Storage Temperature
Moisture sensitivity
ESD HBM
-30 to +85
-40 to +150
JEDEC Level 2
450
RoHS status based on EUDirective2002/95/EC (at time of this document revi-
sion).
°C
V
V
MM
50
Specification
Parameter
Unit
Condition
Min.
Typ.
Max.
Temperature=+25°C, V =3.3V,
CC
V
=2.8V pulsed at 1% to 100% duty cycle,
REG
Overall
Frequency=2450MHz,
circuit per evaluation board schematic, unless
otherwise specified
2.40
18
2.50
GHz
IEEE802.11g
IEEE802.11n
Frequency
Output Power
EVM*
dBm
%
At max data rate, OFDM modulation
RMS, mean
2.5
4
Gain
24
25.5
dB
At +18dBm RF P and 54Mbps
OUT
Gain Variance
Power Detector
1.25
±dB
-30°C to +85°C
P
=8dBm
0.4
0.7
V
V
OUT
P
=18dBm
1.25
1.35
1.50
OUT
Current
Operating
Quiescent
120
85
145
mA
mA
At +18dBm RF P
and 54Mbps
OUT
Data rate @<3.5% EVM RMS, mean,
T=-30°C to +50°C
I
Current
2
mA
V =+3.3V
CC DC
REG
Shutdown
10
μA
Power Supply
3.0
3.3
2.8
4.5
V
V
Operating Range
Operating Range
DC
DC
V
, V
Input Voltage
2.75
2.9
REG1 REG2
Output VSWR
10:1
-10
Input Return Loss
Turn-on Time**
Second Harmonic
-15
0.5
dB
μS
1.0
-27
Output stable to within 90% of final gain
dBm
Fundamental frequency is between 2400MHz
and 2500MHz; RF P =+18dBm. See note 2.
OUT
Notes:
*The EVM specification is obtained with a signal generator that has an EVM floor of less than 0.7%.
**The PA must operate with gated bias voltage input at 1% to 99% duty cycles without any EVM or other parameter degradation.
Note 2: For best harmonic rejection please refer to the harmonic rejection application schematic.
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
2 of 12
Rev A5 DS070517
RF5122
Pin
1
Function
RF IN
Description
Interface Schematic
RF input. Input is matched to 50Ω and DC block is provided internally.
VCC
Interstage
Match
Input
Match
Bias current control voltage for the first and second amplifier stage.
2
3
VREG
PDETECT
Power detector which provides an output voltage proportional to the RF
output power level. May need external decoupling capacitor for stability.
May need external circuitry to bring output voltage to desired level.
Must be left as no connect, not grounded.
4
5
N/C
RF OUT
RF output. Output is matched to 50Ω and DC block is provided internally.
VCC2
Output
Match
RF OUT
Voltage supply for the second amplifier stage.
6
7
8
VC2
VC1
VCC
Voltage supply for the first amplifier stage.
Supply voltage for the bias reference and control circuit. May be connected
with V and V (with a single supply voltage) as long as V does not
C1
C2
CC
exceed +4.5V in this configuration.
DC
The center metal base of the QFN package provides DC and RF ground as
well as heat sink for the amplifier.
Pkg
Base
GND
Package Drawing
0.63
0.53
2 PLCS
0.10 C
0.152
REF
INDEX
AREA
0.10 C
2 PLCS
2.20
0.05
0.00
SEATING
B
A
2.20
C
PLANE
0.65
0.10
MAX
1.20
1.00
TYP
0.31
0.21
0.28
0.18
Dimensions in mm.
Shaded lead is pin 1.
0.10 M C A B
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Rev A5 DS070517
3 of 12
RF5122
Pin Out
8
7
RF IN
VREG
1
2
6
5
VC2
RF OUT
3
4
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
4 of 12
Rev A5 DS070517
RF5122
Theory of Operation and Application Information
The RF5122 is a two-stage power amplifier (PA) with a minimum gain of 24dB minimum gain in the 2.4GHz to 2.5GHz ISM
band. The RF5122 has integrated input, interstage and output matching components thus allowing minimal bill of material
(BOM) parts count in end applications. The RF5122 is designed primarily for IEEE802.11b/g/n 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 laptop PC, and will maintain required linearity at decreased supply voltages.
The RF5122 requires only a single positive supply of 3.3V nominal (or greater) to operate to full specifications. Power control is
provided through one bias control input pin (VREG). DC blocking caps are provided internally and the evaluation board circuit
(available from RF Micro Devices, Inc. (RFMD)) is optimized for 3.3VDC 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. Pin 4 must be left as a no-connect on the PCB in order for the PA to work properly. Other configurations
may also work, but the design process is much easier and quicker if the layout is copied from the RF5122 evaluation board.
Gerber files of RFMD PCBA designs can be provided on request. The RF5122 is a very easy part to implement, but care in cir-
cuit layout and component selection is always advisable when designing circuits to operate at 2.5GHz. The RF5122 evaluation
board layout and schematic are available using 0201 (US) size components which will help shrink the overall size of the total
area of the PA and components of the intended design. Please contact RFMD Sales or Application Engineering for additional
data and guidance.
For best performance, it is important to duplicate (as closely as possible) the layout of the evaluation board. The RF5122 has
primarily been characterized with a voltage on VREG of 2.8VDC. If you prefer to use a control voltage that is significantly differ-
ent than 2.8VDC, or a different frequency than the recommended frequency range, contact RFMD Sales or Applications Engi-
neering for additional data and guidance.
QFN8 Package Area versus Other Small Form Factor Package Areas
Area (mm2) Delta (Δ) (mm2) to QFN8
Package Type
Length (mm) Width (mm)
SOT 23-6
QFN12
3.1
3.0
2.9
2.2
3.0
3.0
2.8
2.2
9.30
9.00
8.12
4.84
4.46
4.16
3.28
0.00
SOT 23-5
QFN8
An application schematic for 2.5GHz operation is included that has two additional components, one shunt inductor, and one
shunt capacitor, on the output for improved second harmonic rejection. This layout provides ~20dB rejecetion at 5GHz with a
minimal BOM count.
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Rev A5 DS070517
5 of 12
RF5122
Application Schematic
for Improved Second Harmonic Performance
VCC
1 μF
27 nH
1 nF
VCC
1 μF
8
7
RF IN
1
2
6
5
Input
Match
Interstage
Match
Output
Match
1.2 nH*
2.2 pF*
10 pF
Power
Detector
VREG
RF OUT
Bias Circuit
3
4**
* The 2.2 pF cap can be placed at the same point as the 1.2 nH inductor
330 pF
which should be as close as possible to the DC blocking cap (10 pF) the
placement can be modified for the best linear performance. A series
capacitor (10 pF) must be added to provide a DC block after the 2F0 Filter.
PDETECT
**Pin 4 must be left as a no-connect on the PCB.
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
6 of 12
Rev A5 DS070517
RF5122
Evaluation Board Schematic
VCC
P1
1
GND
VCC
VCC
C1
P1-2
P1-3
2
3
1 μF
L1
27 nH
C2
1 nF
P2
3
P2-3
P3-3
VREG
2
1
PDETECT
GND
C3
1 μF
8
7
L2
0 Ω
50 Ω μstrip
J1
RF IN
1
2
6
5
Input
Match
Interstage
Match
Output
Match
R1
0 Ω
50 Ω μstrip
J4
Power
Detector
VREG
RF OUT
Bias Circuit
3
4
*Pin 4 should be left as a
no-connect on the PCB.
NOTE:
The RF5122 evaluation board layout and schematic are available
using 0201 (US) size components which will help shrink the overall
size of the total area of the PA and components of this intended
design. Please contact RFMD Sales or Application Engineering for
additional data and guidance.
R2
0 Ω
C6
330 pF
PDETECT
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Rev A5 DS070517
7 of 12
RF5122
Evaluation Board Layout
Board Size 1.0” x 1.0”
Board Thickness 0.031”; Board Material FR-4; Multi-Layer
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
8 of 12
Rev A5 DS070517
RF5122
ACP versus POUT
EVM versus POUT
0.0
-10.0
-20.0
-30.0
-40.0
-50.0
-60.0
-70.0
-80.0
8.0
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
ACP1 2400MHz
ACP1 2450MHz
ACP1 2500MHz
2400MHz ACP2
2450MHz ACP2
2500MHz ACP2
2400MHz
2450MHz
2500MHz
0.0
5.0
10.0
15.0
20.0
10.0
12.0
14.0
16.0
18.0
20.0
22.0
Output Power (dBm)
Output Power (dBm)
Gain verus POUT
Operating Current versus POUT
150.0
140.0
130.0
120.0
110.0
100.0
90.0
30.0
29.0
28.0
27.0
26.0
25.0
24.0
23.0
22.0
80.0
70.0
60.0
2400MHz
2450MHz
2500MHz
2400MHz
2450MHz
2500MHz
50.0
40.0
0.0
5.0
10.0
15.0
20.0
0.0
5.0
10.0
15.0
20.0
25.0
Output Power (dBm)
Output Power (dBm)
PDETECT versus POUT
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
2400MHz
2450MHz
2500MHz
0.0
5.0
10.0
15.0
20.0
Output Power (dBm)
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Rev A5 DS070517
9 of 12
RF5122
PCB Design Requirements
PCB Surface Finish
The PCB surface finish used for RFMD's qualification process is electroless nickel, immersion gold. Typical thickness is 3μinch
to 8μinch gold over 180μinch nickel.
PCB Land Pattern Recommendation
PCB land patterns are based on IPC-SM-782 standards when possible. The pad pattern shown has been developed and tested
for optimized assembly at RFMD; however, it may require some modifications to address company specific assembly pro-
cesses. The PCB land pattern has been developed to accommodate lead and package tolerances.
PCB Metal Land Pattern
A = 0.44 x 0.28 Typ.
B = 0.28 x 0.44 Typ.
C = 1.30 Sq.
Dimensions in mm.
0.65
Typ.
Pin 8
B
B
Pin 1
Pin 6
A
A
A
A
0.32 Typ.
C
0.65 Typ.
0.68 Typ.
B
B
Pin 4
0.68
Typ.
0.32 Typ.
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
10 of 12
Rev A5 DS070517
RF5122
PCB Solder Mask Pattern
Liquid Photo-Imageable (LPI) solder mask is recommended. The solder mask footprint will match what is shown for the PCB
metal land pattern with a 2mil to 3mil expansion to accommodate solder mask registration clearance around all pads. The
center-grounding pad shall also have a solder mask clearance. Expansion of the pads to create solder mask clearance can be
provided in the master data or requested from the PCB fabrication supplier.
A = 0.57 x 0.41 Typ.
B = 0.41 x 0.57 Typ.
C = 1.20 Sq.
Dimensions in mm.
0.65
Typ.
Pin 8
B
B
Pin 1
Pin 6
A
A
A
A
0.32 Typ.
C
0.65 Typ.
0.68 Typ.
B
B
Pin 4
0.68
Typ.
0.32 Typ.
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Rev A5 DS070517
11 of 12
RF5122
RoHS* Banned Material Content
RoHS Compliant:
Yes
0.008
N/A
-
Package total weight in grams (g):
Compliance Date Code:
Bill of Materials Revision:
Pb Free Category:
e3
Pa r ts Pe r M i l l i o n (PPM )
B i l l o f M a te r i a l s
Pb
0
Cd
0
H g
0
Cr V I
PB B
P B
D i e
0
0
0
0
0
0
0
0
0
0
0
0
M o l d i n g Co m p o u n d
Le a d F r a m e
D i e A tta ch E p o x y
W i r e
0
0
0
0
0
0
0
0
0
0
0
0
So l d e r Pl a ti n g
0
0
0
Th i s R o H S b a n n e d m a te r i a l co n te n t d e cl a r a ti o n wa s p r e p a r e d so l e l y o n i n fo r m a ti o n , i n cl u d i n g a n a
d a ta , p r o vi d e d to R F M D b y i ts su p p l i e r s, a n d a p p l i e s to th e B i l l o f M a te r i a l s (B O M ) r e v i si o n n o
* DIRECTIVE 2002/95/EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 27 January 2003 on the restriction o
use of certain hazardous substances in electrical and electronic equipment
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
12 of 12
Rev A5 DS070517
相关型号：
©2020 ICPDF网 联系我们和版权申明