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RF3863
WIDE BANDWIDTH, HIGH LINEARITY
LOW NOISE AMPLIFIER
„
NC
NC
13
NC 1
12 NC
NC 2
11 RF OUT
RF IN 3
10 NC
NC 4
9 NC
5
6
7
8
NC
„
14
ACG
„
15
NC
„
Low Noise and High Intercept
Point
Adjustable Bias Current for
Enhanced IP3
Single 2.5V to 6.0V Power
Supply
700MHz to 3800MHz Operation
QFN16 3mmx3mm Package
16
NC
„
VDD
Features
NC
Package Style: QFN, 16-Pin, 3mmx3mm
Applications
„
„
„
„
First Stage
CDMA,PCS,GSM/EDGE,UMT
S LNA/Linear Driver
First Stage WLAN LNA/Linear
Driver
First Stage WiMAX LNA/Linear Driver
General Purpose Amplification
Functional Block Diagram
Product Description
The RF3863 is a low noise amplifier with a high output IP3. The amplifier
is self-biased from a single voltage supply with 50Ω input and output
ports. The useful frequency range is from 700MHz to 3800MHz. A 0.8dB
noise figure and 36dBm OIP3 performance is achieved with a 5V VDD,
90mA. Current can be increased to raise OIP3 while having minimal effect
on noise figure. The IC is featured in a standard QFN, 16-pin, 3mmx3mm
package.
Ordering Information
RF3863
RF3863PCK-410
Wide Bandwidth, High Linearity Low Noise Amplifier
Fully Assembled Evaluation Board with 5 Sample Parts
1.5GHz to 2.7GHz
Optimum Technology Matching® Applied
GaAs HBT
GaAs MESFET
InGaP HBT
SiGe BiCMOS
Si BiCMOS
SiGe HBT
9GaAs pHEMT
Si CMOS
Si BJT
GaN HEMT
RF MEMS
LDMOS
RF MICRO DEVICES®, RFMD®, Optimum Technology Matching®, Enabling Wireless Connectivity™, PowerStar®, POLARIS™ TOTAL RADIO™ and UltimateBlue™ are trademarks of RFMD, LLC. BLUETOOTH is a trademark 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.
DS100113
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1 of 8
RF3863
Absolute Maximum Ratings
Parameter
Rating
Unit
Supply Voltage
6
V
Input RF Level
+10
dBm
Current Drain, IDD
150
mA
Operating Ambient Temperature
-40 to +85
°C
Storage Temperature
-40 to +150
°C
Note 1: Max continuous RF IN is +10dBm. The max transient RF IN is
+20dBm.
Caution! ESD sensitive device.
Exceeding any one or a combination of the Absolute Maximum Rating conditions may
cause permanent damage to the device. Extended application of Absolute Maximum
Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Absolute Maximum Rating conditions is not implied.
RoHS status based on EUDirective2002/95/EC (at time of this document revision).
The information in this publication is believed to be accurate and reliable. However, 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 circuitry, recommended application circuitry and specifications at any time without prior notice.
Specification
Typ.
Max.
3.8
GHz
Current
90
110
mA
Gain
10
Parameter
Min.
Unit
Condition
High Band
Frequency
3.3
VDD =5V
dB
Noise Figure
0.9
dB
OIP3
37.0
dBm
OP1dB
22.0
dBm
S11
-11
dB
S22
-18
dB
+25°C, VDD =5V, IDD =90mA, 3500MHz
unless specified
f1 =3500MHz, f2 =3501MHz
Mid Band
Frequency
1.5
2.7
GHz
90
110
mA
VDD =5V
14
15
16.5
dB
+25°C, VDD =5V, IDD =90mA, 2000MHz unless
specified
0.8
1.0
OIP3
33.0
35.5
OP1dB
21.0
22.5
Current
Gain
Noise Figure
dB
dBm
25.0
f1 =2000MHz, f2 =2001MHz
dBm
S11
-10
dB
S22
-17
dB
Low Band
Frequency
700
1100
MHz
110
mA
VDD =5V
dB
+25°C, VDD =5V, IDD =90mA, 850MHz unless
specified
Current
90
Gain
18
Noise Figure
0.9
dB
OIP3
35
dBm
OP1dB
22
dBm
S11
-10
dB
S22
-17
dB
51
°C/W
f1 =850MHz, f2 =851MHz
Thermal
ThetaJC
Power Supply
Device Operating Voltage
2.5
5.0
6.0
V
Operating Current
65
90
110
mA
2 of 8
VDD =5.0V, R2=open
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7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
DS100113
RF3863
Pin
1
2
3
4
5
6
7
Function
NC
NC
RF IN
NC
NC
NC
ACG
8
9
10
11
12
13
14
15
16
Pkg
Base
NC
NC
NC
RF OUT
NC
NC
NC
VD
NC
GND
Description
Interface Schematic
Not connected.
Not connected.
RF input pin. 50Ω matched. This pin is DC-blocked.
Not connected.
Not connected.
Not connected.
AC ground. Shunt cap may be added for tuning. Shunt resistor may be
added to increase IDD/IP3.
Not connected.
Not connected.
Not connected.
RF output pin. 50Ω matched. This pin is DC-blocked.
Not connected.
Not connected.
Not connected.
Bias voltage. 2.5V to 6.0V applied through bias inductor.
Not connected.
Ground connection.
Package Drawing
1.70
0.28
TYP
0.18
3.00
Pin 1 ID
A
Pin 1 ID
0.50 TYP
3.00
0.15 C
B
2 PLCS
0.15 C
1.70
0.40
TYP
0.20
0.05
0.10 M C A B
2 PLCS
0.203 REF
0.1 C
Dimensions in mm.
Shaded lead is pin 1.
DS100113
0.925
0.775
0.102 REF
C
0.08 C
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7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
3 of 8
RF3863
Evaluation Board Schematic
700MHz to 3800MHz
V DD
C2
10 nF
C1
L1
16
15
14
13
1
12
2
11
3
10
4
9
R1
RF IN
L2
5
6
7
RF OUT
L3
8
C3
R2
C4
Component 700-1100 MHz 1.5-2.7 GHz
3.3-3.8 GHz
C1 (pF)
10
10
10
C3 (pF)
100
100
100
C4 (pF)
10
DNP
DNP
L1 (nH)
56
5.6
2.2
L2 (nH)
18
4.7
4.7
R1 (ohm)
5.6 nH
0
0
R2 (ohm)
DNP
DNP
DNP
L3 (nH)
15
DNP
DNP
R2 is DNP for standard 90 mA current draw. If
R2 is added, the IDD will increase. A 20 Ω R2
will raise the current to achieve higher linearity.
Theory of Operation
Low noise figure/high IP3 make the RF3863 ideal for use as both a receive LNA and a transmit driver for cellular/DCS/PCS/UMTS and WiMax platforms, in addition to many other general purpose applications. Standard evaluation boards
cover 700MHz to 1100MHz, 1500MHz to 2700MHz, and 3300MHz to 3800MHz. Viewing the data sheet evaluation board
schematic, refer to the information below for purpose/function of external components:
• R1/L3 (0Ω/unpopulated on standard evaluations boards): These unused components were placed for convenience and
flexibility when needed to optimize matching for an out-of-band application.
4 of 8
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7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
DS100113
RF3863
5V Noise Figure versus Temperature
5V Gain versus Temperature
1.4
18.0
1.2
17.0
16.0
15.0
Gain (dB)
Noise Figure (dB)
1.0
0.8
0.6
14.0
13.0
0.4
12.0
-40
25
85
0.2
-40
25
11.0
85
0.0
10.0
1500.0
2000.0
2500.0
3000.0
1500.0
2000.0
Frequency (MHz)
2500.0
3000.0
Frequency (MHz)
5V OIP3 versus Temperature
5V P1dB versus Temperature
39.0
23.5
38.5
23.0
38.0
P1dB (dBm)
OIP3 (dBm)
22.5
37.5
37.0
36.5
22.0
21.5
36.0
21.0
-40
25
85
35.5
-40
25
85
35.0
20.5
1500.0
2000.0
2500.0
3000.0
1500.0
2000.0
Frequency (MHz)
2500.0
3000.0
Frequency (MHz)
5V Noise Figure versus Temperature
5V Gain versus Temperature
1.4
11.5
11.0
1.2
1.0
10.0
Gain (dB)
Noise Figure (dB)
10.5
0.8
0.6
9.5
9.0
8.5
8.0
0.4
-40
25
85
-40
25
85
7.5
0.2
7.0
3.2
3.3
3.4
3.5
3.6
Frequency (GHz)
DS100113
3.7
3.8
3.9
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
Frequency (GHz)
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support, contact RFMD at (+1) 336-678-5570 or [email protected].
5 of 8
RF3863
5V OIP3 versus Temperature
5V P1dB versus Temperature
40.0
23.6
23.4
39.5
23.2
39.0
22.8
38.0
22.6
P1dB (dBm)
OIP3 (dBm)
23.0
38.5
37.5
37.0
22.4
22.2
22.0
21.8
36.5
21.6
36.0
21.4
-40
25
85
35.5
-40
25
85
21.2
35.0
21.0
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
3.2
3.3
Frequency (GHz)
3.4
3.5
3.6
3.7
3.8
3.9
Frequency (GHz)
RF3863- 410 Evaluation Board, OIP3 vs R2 value
Vdd = 5.0 V
Optimum OIP3 enhancement at R2 = 20 ohm.
RF3863 Icc vs R2
Vdd = 5.0 V
R2 = 20 ohm for optimal OIP3
39.6
39.4
135
39.2
130
39
125
OIP3 (dBm))
38.8
R2 unpopulated
120
R2 = 27 ohm
R2 = 20 ohm
38.6
115
R2 unpopulated
R2 = 18 ohm
R2 = 10 ohm
38.4
R2 = 27 ohm
110
R2 = 20 ohm
R2 = 18 ohm
R2 = 10 ohm
105
38.2
100
38
95
37.8
90
37.6
1750
1850
1950
2050
2150
2250
2350
Frequency (MHz)
6 of 8
2450
2550
2650
2750
85
R2 unpopulated
R2 = 27 ohm
R2 = 20 ohm
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support, contact RFMD at (+1) 336-678-5570 or [email protected].
R2 = 18 ohm
R2 = 10 ohm
DS100113
RF3863
• L2/C3/C4: Placed to optimize input match and enhance out-of-band low frequency stability.
• R2: Optionally placed to increase bias current and IP3. 20Ω value is found to be the best case. (See graphs.)
• L1/C1: Influence output return loss.
The RF3863 has internal DC-blocking capacitors at RF IN and RF OUT. In addition, impedance seen looking out at pins 7/15
has been shown to influence response. As a result, two port S-parameters become non-applicable. In the event matching is
desired for frequency bands outside of those provided with standard evaluation boards, the following approach can be used:
• Start with matching seen for standard evaluation board closest to the desired band of operation.
• Optimize values at L2/C4/L1 to obtain response/performance.
When considering use of RF3863 outside of standard frequency bands, it is advisable to consider RF3861 as an option. We
can describe the difference between the two designs here to illustrate that point. That difference, in terms of performance, can
be outlined by two statements:
1. RF3863, in the primary bands of interest, shows a lower noise figure.
2. In the trade-off here, RF3861 generally sees better return loss, and matching is more easily accomplished.
“Out-of-band” would primarily involve frequencies below 700MHz. Refer to the RF3861 data sheet’s “Theory of Operation” and
“Application Schematic” sections where the 700MHz to 1100MHz standard evaluation board is specified from 400MHz to
1300MHz. Excellent performance is seen, providing an option for lower frequency operation. In addition, RF3861/RF3863
noise figure delta is not present below 700MHz. The conclusion then, for the case of low frequency of operation, is that
RF3861 offers the most easily implemented solution. Simply use the standard RF3861 700MHz to 1100MHz evaluation
board.
DS100113
www.BDTIC.com/RFMD
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
7 of 8
RF3863
8 of 8
www.BDTIC.com/RFMD
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
DS100113