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Preliminary 2
Typical Applications * 3V 1850-1910 CDMA-2000 Handsets * 3V 1920-1980 W-CDMA Handsets * Spread Spectrum Systems
RF2161
3V W-CDMA POWER 1900MHZ 3V LINEAR POWER AMPLIFIER
* Commercial and Consumer Systems * Portable Battery-Powered Equipment
2
POWER AMPLIFIERS
Product Description
The RF2161 is a high-power, high-efficiency linear amplifier IC targeting 3V handheld systems. 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 3V CDMA-2000 and W-CDMA handsets, spread spectrum systems, and other applications in the 1920MHz to 1980 MHz band. The device is self-contained with 50 input and the output can be easily matched to obtain optimum power, efficiency, and linearity characteristics over all recommended supply voltages.
4.20 3.95 3.50 3.35 1.50 1.20 0.38 0.40 sq.
1
3.50 3.35 4.20 3.95
2.00
1.50 sq.
0.28 0.13
0.80
ALL SOLDER PAD TOLERANCES P0.05mm
Optimum Technology Matching(R) Applied
Si BJT Si Bi-CMOS
u
Package Style: MP16KO1A
GaAs HBT SiGe HBT
GaAs MESFET Si CMOS
Features * Single 3V Supply * 27dBm Linear Output Power * 30dB Linear Gain * 35% Linear Efficiency * On-board Power Down Mode
VCC2
VCC2
VCC2
VCC 14 8 VPD2
1 GND2 2 VCC1 3 RFIN 4 5 GND1
16
15
13 12 RF OUT 11 RF OUT 10 RF OUT
6 VPD1
7 V MODE
GND
2F0 9
Ordering Information
RF2161 RF2161 PCBA 3V W-CDMA Power 1900MHZ 3V Linear Power Amplifier Fully Assembled Evaluation Board Tel (336) 664 1233 Fax (336) 664 0454 http://www.rfmd.com
Functional Block Diagram
RF Micro Devices, Inc. 7625 Thorndike Road Greensboro, NC 27409, USA
Rev A3 010514
2-197
RF2161
Absolute Maximum Ratings Parameter
Supply Voltage (RF off) Supply Voltage (POUT 31dBm) Mode Voltage (VMODE)
Preliminary
Rating
+8.0 +5.0 +3.0 +3.0 +6 -30 to +100 -30 to +150
Unit
VDC VDC VDC VDC dBm C 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).
2
POWER AMPLIFIERS
Control Voltage (VPD) Input RF Power Operating Case Temperature Storage Temperature
Parameter
Overall
Usable Frequency Range Typical Frequency Range Linear Gain Second Harmonic (including second harmonic trap) Third Harmonic Fourth Harmonic Maximum Linear Output Power (W-CDMA Modulation) Total Linear Efficiency Adjacent Channel Power Rejection@5MHz Adjacent Channel Power Rejection@10MHz Noise Power Maximum Linear Output Power (W-CDMA Modulation) Total Linear Efficiency Input VSWR Output Load VSWR
Specification Min. Typ. Max.
1850 1850 to 1910 1920 to 1980 30 28 -35 -40 -45 27 30 35 -40 -50 -137 26 35 < 2:1 5:1 3.0 3.4 120 13 10 0 2.8 2.8 0 5.0 2000
Unit
Condition
T=25 C, VCC =3.4V unless otherwise specified
MHz MHz dB dB dBc dBc dBc dBm % dBc dBc dBm/Hz dBm % No oscillations V mA mA A V V VMODE High, POUT =27dBm POUT =27dBm, W-CDMA Modulation 3G PP 3.2 03-00 DPCCH+1DPDCH POUT =27dBm, W-CDMA Modulation 3G PP 3.2 03-00 DPCCH+1DPDCH POUT =+27dBm, Rx Band 2110MHz to 2170MHz VCC =3.0V Mode=Low Mode=High
28 26
-38 -48
Power Supply
Power Supply Voltage Idle Current VPD Current Total Current (Power down) VPD "Low" Voltage VPD "High" Voltage MODE "High" Voltage MODE "Low" Voltage MODE = high Total pins 6 and 8, VPD = 2.8 V VPD = low
2.7 2.5
10 0.2 2.9 0.5
2-198
Rev A3 010514
Preliminary
Pin 1 2 3 4 Function VCC2 GND2 VCC1 RF IN Description
RF2161
Interface Schematic
Power supply for second stage and interstage match. Pins 1, 15 and 16 should be connected by a common trace where the pins contact the printed circuit board. Ground for second stage. For best performance, keep traces physically short and connect immediately to ground plane. This ground should be isolated from the backside ground contact. Power supply for first stage and interstage match. VCC should be fed See pin 4. through a 1.2nH inductor terminated with a 8.2pF capacitor on the supply side. The inductor should be as close to the pin as possible. RF input. An external series capacitor is required as a DC block. The input match can be improved to <2:1 by using a series capacitor and shunt inductor.
2
VCC1
RF IN From Bias Stages GND1
5 6
GND1 VPD1
7
VMODE
8
VPD2
9 10
GND RF OUT
11 12 13 14 15 16
RF OUT RF OUT 2FO VCC VCC2 VCC2
Ground for first stage. For best performance, keep traces physically See pin 4. short and connect immediately to ground plane. This ground should be isolated from the backside ground contact. Power Down control for first and second stages. When this pin is "low", all first and second stage circuits are shut off. When this pin is 2.8V, all first and second stage circuits operate normally. VPD1 requires a regulated 2.8V for the amplifier to operate properly over all specified temperature and voltage ranges. A dropping resistor from a higher regulated voltage may be used to provide the required 2.8V. VMODE adjusts the bias to the 2nd and 3rd stages. For full power operation, MODE is set low. When operating in a lower output power mode (<+25dBm) this pin is set high to reduce bias current by up to 50%. An external series resistor is optional to limit the amount of current required. At low temperature (-30C), it is recommended to set VMODE low to maintain correct operation. Power Down control for third stage. When this pin is "low", all and third stage circuits are shut off. When this pin is 2.8V, all and third stage circuits operate normally. VPD requires a regulated 2.8V for the amplifier to operate properly over all specified temperature and voltage ranges. A dropping resistor from a higher regulated voltage may be used to provide the required 2.8V. A 15pF high frequency bypass capacitor is recommended. For best performance, keep traces physically short and connect immediately to ground plane. This ground should be isolated from the backside ground contact. RF output and power supply for final stage. This is the unmatched colRF OUT lector output of the third stage. A DC block is required following the matching components. The biasing may be provided via a parallel L-C set for resonance at the operating frequency of 1920MHz to 1980MHz. From Bias It is important to select an inductor with very low DC resistance with a Stages 1A current rating. Alternatively, shunt microstrip techniques are also applicable and provide very low DC resistance. Low frequency bypassing is required for stability. Same as pin 10. See pin 10. Same as pin 10. Second harmonic trap. Keep traces physically short and connect immediately to ground plane. This ground should be isolated from backside ground contact. Supply for bias reference and control circuits. High frequency bypassing may be necessary. Same as Pin 1. Same as Pin 1. See pin 10.
Rev A3 010514
2-199
POWER AMPLIFIERS
RF2161
Pin Pkg Base Function GND Description
Ground connection. The backside of the package should be soldered to a top side ground pad which is connected to the ground plane with multiple vias. The pad should have a short thermal path to the ground plane.
Preliminary
Interface Schematic
2
POWER AMPLIFIERS
2-200
Rev A3 010514
Preliminary
Application Schematic W-CDMA (1920MHz to 1980MHz)
1 F VCC 4.7 uF +
RF2161
10 nF
8.2 pF
C30
10 nH
15 pF
15 pF
TL3 1 1.2 nH 2 3 4 5 6 7 8 16 15 14 13 12 11 10 15 nH 9 TL1 TL2 C1** 15 pF RF OUT C14**
L1*
15 pF RF IN
R2
15 pF
15 pF
1 uF
VREG 1.8k VMODE
* L1 is a High Q inductor (i.e., Coilcraft 0805HQ-series). **C1 and C14 are High Q capacitors (i.e., Johanson C-series).
Transmission Line Length Board WCDMA R2 () 150 C30 (pF) 8.2 C1 (pF) 4.7 L1 (nH) 16 C14 (pF) 2.2 WCDMA
TL1 0.044"
TL2 0.140"
TL3 0.022"
Rev A3 010514
2-201
POWER AMPLIFIERS
+
10 nF 10 nF
2
+
RF2161
Evaluation Board Schematic W-CDMA (1920MHz to 1980MHz)
C7 1 F P1 C2 4.7 uF C8 10 nF L2 10 nH C6 15 pF C26 10 nF C4 15 pF +
Preliminary
+
2
POWER AMPLIFIERS
C12 10 nF C11 8.2 pF
C30
P1 P2 P3
VCC VREG VMODE GND C3 15 pF
TL3 1 L3 1.2 nH 2 3 4 5 C27 15 pF C10 1 uF 6 7 8 16 15 14 13 12 11 10 9 C13 15 pF
2161400-
L1*
P4
TL1
TL2 C1**
50 strip
J1 RF IN
50 strip
C5 15 pF
R2
J2 RF OUT
C14**
L4 15 nH
+
P2 R1 1.8k P3
* L1 is a High Q inductor (i.e., Coilcraft 0805HQ-series). **C1 and C14 are High Q capacitors (i.e., Johanson C-series).
Transmission Line Length Board WCDMA R2 () 150 C30 (pF) 8.2 C1 (pF) 4.7 L1 (nH) 16 C14 (pF) 2.2 WCDMA
TL1 0.044"
TL2 0.140"
TL3 0.022"
2-202
Rev A3 010514
Preliminary
Evaluation Board Layout Board Size 2.00" x 2.00"
RF2161
Board Thickness 0.028", Board Material FR-4, Multi-Layer, Ground Plane at 0.014"
2
POWER AMPLIFIERS
Rev A3 010514
2-203
RF2161
Preliminary
2
POWER AMPLIFIERS
2-204
Rev A3 010514

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