RMPA0959 Fairchild Semiconductor, RMPA0959 Datasheet - Page 5

• Manufacturer Part Number: RMPA0959
• Description: IC MOD RF POWER AMP 10PIN 4X4LCC
• Manufacturer: Fairchild Semiconductor
• Type: Power Amplifierr

Specifications of RMPA0959

• Current - Supply: 62mA
• Frequency: 824MHz ~ 849MHz
• Gain: 25dB ~ 26.5dB
• Noise Figure: 4dB
• Package / Case: 11-LCC
• Rf Type: Cellular, CDMA, CDMA2000, AMPS, IS-95
• Voltage - Supply: 3V ~ 4.2V
• Number Of Channels: 1
• Frequency (max): 849MHz
• Output Power: 28dBm
• Power Supply Requirement: Dual
• Single Supply Voltage (min): Not RequiredV
• Single Supply Voltage (typ): Not RequiredV
• Single Supply Voltage (max): Not RequiredV
• Package Type: PLCC
• Dual Supply Voltage (min): 3V
• Dual Supply Voltage (typ): 3.4V
• Dual Supply Voltage (max): 4.2V
• Operating Temperature Classification: Commercial
• Operating Temp Range: -30C to 85C
• Pin Count: 10
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• P1db: -
• Test Frequency: -
• Lead Free Status / Rohs Status: Compliant
• Other names: RMPA0959TR

©2004 Fairchild Semiconductor Corporation
Typical Characteristics
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 frequently 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.
-40.0
-42.0
-44.0
-46.0
-48.0
-50.0
-52.0
-54.0
-56.0
24.0
22.0
20.0
18.0
16.0
14.0
12.0
10.0
-70.0
-72.0
-74.0
-76.0
-78.0
-80.0
8.0
6.0
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6
RMPA0959 Cellular 4x4 PAM, Pout = 16dBm, IS95 mod.
Vcc = 3.4V, Vref = 2.85V, Vmode = 2.0V, Tc = 25C,
Vref = 2.85V, Pout = 16dBm, Vmode = 2.0V
Vref = 2.85V, Pout = 16dBm, Vmode = 2.0V
824
Frequency (MHz)
RMPA0959
RMPA0959
Vcc (V)
Vcc (V)
836.5
(Continued)
849
The following charts show measured performance of the
PA module in low-power mode (Vmode = +2.0V) at
+16dBm output power and over a range of supply voltages
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. The PA module can be biased at a supply
voltage of as low as 0.7V with an efficiency as high as 10-
12 percent at +8dBm output power.
linearity is still maintained even under this low supply
voltage condition.
-50.0
-55.0
-60.0
-65.0
-70.0
-75.0
-80.0
30.0
28.0
26.0
24.0
22.0
20.0
500
450
400
350
300
250
200
150
100
50
0
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6
0.0
Vref = 2.85V, Pout = 16dBm, Vmode = 2.0V
Vref = 2.85V, Pout = 16dBm, Vmode = 2.0V
Frequency = 836.5MHz, Vcc = 3.4V, Vref = 2.85V
4.0
Vmode = 0V
Vmode = 2.0V
RMPA0959 Cellular 4x4 PAM
8.0
RMPA0959
RMPA0959
12.0
Pout (dBm)
Vcc (V)
Vcc (V)
16.0
20.0
Excellent signal
24.0
RMPA0959 Rev. D
28.0