Document
Agilent WS2111 4 x 4 Power Amplifier Module for UMTS850 (824 – 849 MHz)
Data Sheet
Description
The WS2111, a Wide-band Code Division Multiple Access (WCDMA) Power Amplifier (PA), is a fully matched 10-pin surface mount module developed for WCDMA handset applications. This power amplifier module operates in the 824–849 MHz bandwidth. The WS2111 meets the stringent WCDMA linearity requirements for output power of up to 28 dBm. A low current (Vcont) pin is provided for high efficiency improvement of the low output power range.
The WS2111 features CoolPAM Circuit technology offering stateof-the-art reliability, temperature stability and ruggedness.
The WS2111 is self contained, incorporating 50ohm input and output matching networks.
Features
• CoolPAM circuit technology • Good linearity • High efficiency • 10-pin surface mounting package
(4 mm x 4 mm x 1.4 mm) • Low power-state control • Internal 50Ω matching networks
for both RF input and output • Low quiescent current
Applications
• W-CDMA Handsets • HSDPA Handsets
Functional Block Diagram
Vcc2(6)
RF Input (4)
Input Match
DA
Inter Stage Match
PA
Vcc1 (5)
MMIC
Bias Circuit & Control Logic
Vcont(2)
Vref(1)
Output Match
RF Output (8)
MODULE
Table 1. Absolute Maximum Ratings[1]
Parameter
RF Input Power DC Supply Voltage DC Reference Voltage Storage Temperature
Symbol
Pin Vcc Vref Tstg
Min.
– – – -55
Typical
– 3.4 2.85 –
Max.
10.0 5.0 3.3 +125
Unit
dBm V V °C
Table 2. Recommended Operating Conditions
Parameter
DC Supply Voltage – Mid/High Power Mode – Low Power Mode
DC Reference Voltage
Mode Control Voltage – High Power Mode – Low/Mid Power Mode
Operating Frequency
Ambient Temperature
Symbol
Min.
Vcc
Vref
Vcont Vcont Fo Ta
3.2
2.75
– – 824 -20
Typical
3.4 1.5 2.85
0 2.85
25
Max.
4.2
2.95
– – 849 90
Unit
V V V
V V MHz °C
Table 3. Power Range Truth Table
Power Mode
Symbol Vref Vcont[2] Vcc Range
High Power Mode[3]
PR3
2.85 Low
3.4 ~28 dBm
Mid Power Mode[3]
PR2
2.85 High
3.4 ~16 dBm
Low Power Mode[3]
PR1
2.85 High
1.5 ~ 7 dBm
Shut Down Mode[4]
–
0.00 –
3.4 –
Notes: 1. No damage assuming only one parameter is set at limit at a time with all other parameters set at
or below nominal value. 2. High ( 1.5V – 3.0V), Low (0.0V – 0.5V). 3. To change between High Power Mode and Low Power Mode, switch Vcont accordingly. 4. In order to shut down the module, turn off Vref accordingly.
2
Electrical Specifications
Table 4. Electrical Characteristics for WCDMA Mode (Vcc=3.4V, Vref=2.85V, Temp=+25°C)[1]
Characteristics
Symbol
Condition
Min. Typ. Max. Unit
Operating Frequency Range
F
824 – 849 MHz
Gain
Gain_hiw[2] High Power Mode, Pout=28.0 dBm
25 28
dB
Gain_hi
High Power Mode, Pout=27.5 dBm
25 28
dB
Gain_mid
Mid Power Mode, Pout=16.0 dBm
14.5 17.5
dB
Gain_low
Low Power Mode, Pout=7.0 dBm, Vcc=1.5V 12
15
dB
Power Added Efficiency
PAE_hiw[2]
High Power Mode, Pout=28.0 dBm
39 42.6
PAE_hi
High Power Mode, Pout=27.5 dBm
36 40
PAE_mid
Mid P.