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PDF RMPA1967 Data sheet ( Hoja de datos )

Número de pieza RMPA1967
Descripción CDMA2000-1X and WDCMA Power Edge Power Amplifier Module
Fabricantes Fairchild Semiconductor 
Logotipo Fairchild Semiconductor Logotipo



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No Preview Available ! RMPA1967 Hoja de datos, Descripción, Manual

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May 2005
RMPA1967
US-PCS CDMA, CDMA2000-1X and WDCMA
Power Edge™ Power Amplifier Module
Features
Single positive-supply operation and low power and
shutdown modes
40% CDMA/WCDMA efficiency at +28 dBm average output
power
Compact lead-free compliant, LCC package-
(3.0 x 3.0 x 1.0 mm nominal)
Internally matched to 50 Ohms and DC blocked RF
input/output
Meets CDMA2000-1XRTT/WCDMA performance require-
ments
Meets HSDPA performance requirements
Alternative pin-out to Fairchild RMPA1965
Device
General Description
The RMPA1967 power amplifier module (PAM) is designed for
CDMA, CDMA2000-1X, WCDMA and HSDPA personal commu-
nications system (PCS) applications. The 2-stage PAM is inter-
nally matched to 50 Ohms to minimize the use of external
components and features a low-power mode to reduce standby
current and DC power consumption during peak phone usage.
High power-added efficiency and excellent linearity are
achieved using Fairchild RF’s InGaP Heterojunction Bipolar
Transistor (HBT) process.
Functional Block Diagram
(Top View)
Vref 1
Vmode 2
RF IN 3
Vcc1 4
MMIC
DC Bias Control
Input
Match
8 GND
7 GND
Output
Match
6 RF OUT
5 Vcc2
©2005 Fairchild Semiconductor Corporation
RMPA1967 Rev. F
(paddle ground on
package bottom)
1
www.fairchildsemi.com

1 page




RMPA1967 pdf
Efficiency Improvement Applications
In addition to high-power/low-power bias modes, the efficiency of the PA module can be significantly increased at backed-off RF
power levels by dynamically varying the supply voltage (Vcc) applied to the amplifier. Since mobile handsets and power amplifiers fre-
quently operate at 10-20 dB back-off, or more, from maximum rated linear power, battery life is highly dependent on the DC power
consumed at antenna power levels in the range of 0 to +16dBm. The reduced demand on transmitted RF power allows the PA supply
voltage to be reduced for improved efficiency, while still meeting linearity requirements for CDMA modulation with excellent margin.
High-efficiency DC-DC converters are now available to implement switched-voltage operation.
With the PA module in low-power mode (Vmode = +2.0V) at+16dBm output power and supply voltages reduced from 3.4V nominal
down to 1.2V, power-added efficiency is more than doubled from 9.5 percent to nearly 25 percent (Vcc = 1.2V) while maintaining a
typical ACPR1 of –52dBc and ACPR2 of less than –61dBc. Operation at even lower levels of Vcc supply voltage are possible with a
further restriction on the maximum RF output power.
Recommended Operating Conditions
Parameter
Operating Frequency
Supply Voltage
Reference Voltage
(operating)
(shutdown)
Bias Control Voltage (low-power)
(high-power)
Linear Output Power (high-power)
(low-power)
Case Operating Temperature
Symbol
f
Vcc1, Vcc2
Vref
Vmode
Pout
Tc
Min
1850
3.0
2.7
0
1.8
0
-30
Typical
3.4
2.85
2.0
Max
1910
4.2
3.1
0.5
3.0
0.5
+28
+16
+85
Units
MHz
V
V
V
V
V
dBm
dBm
°C
DC Turn-On Sequence
1) Vcc1 = Vcc2 = 3.4V (typical)
2) Vref = 2.85V (typical)
3) High-Power: Vmode = 0V (Pout > 16 dBm)
Low-Power: Vmode = 2V (Pout < 16 dBm)
RMPA1967 Rev. F
5 www.fairchildsemi.com

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