AP561_09 TRIQUINT [TriQuint Semiconductor], AP561_09 Datasheet - Page 13

• Manufacturer Part Number: AP561_09
• Description: 0.7-2.9 GHz WiMAX 8W Power Amplifier
• Manufacturer: TRIQUINT [TriQuint Semiconductor]

TriQuint Semiconductor, Inc • Phone [phone] • FAX: [phone] • e-mail: [e-mail] • Web site: www. TriQuint.com
AP561
0.7-2.9 GHz WiMAX 8W Power Amplifier
The AP561 can be configured to operate with lower bias current by varying the bias-adjust resistor R2. (Table 1) The
recommended circuit configurations shown previously in this datasheet have the device operating with a 300 mA as the
quiescent current (I
upon the efficiency of the device, but degrade the EVM performance. Measured data shown in the plots below represents the
AP561-PCB2500 measured and configured for 2.6GHz applications. It is expected that variation of the bias current for other
frequency applications will produce similar performance results.
Table 1 : Reduced Current Operation
(mA)
14
13
12
11
10
300
280
260
240
220
200
Icq
9
20
Power Gain vs. Output Average Power vs. Icq
2.5 – 2.7 GHz Application Note: Changing Icq Biasing Configurations
22
330
336
240
343
348
351
(Ω)
R2
200mA
260mA
Freq = 2.6GHz, T= 25ºC
24
Output Power (dBm)
V
(V)
5
5
5
5
5
5
CQ
PD
220mA
280mA
26
). This biasing level represents a tradeoff in terms of EVM and efficiency. Lowering I
2.85
2.81
2.78
2.76
2.73
2.71
28
I
240mA
300mA
(V)
REF
30
32
5
4
3
2
1
0
20
14
13
12
11
10
9
2.4
200mA
260mA
22
EVM vs. Output Average Power vs. Icq
Power Gain vs.Frequency vs. Icq
24
Output Power (dBm)
2.5
220mA
280mA
Freq = 2.6 GHz, T= 25ºC
200mA
260mA
26
Vcc = 12V, T= 25ºC
Frequency (GHz)
240mA
300mA
28
2.6
220mA
280mA
30
240mA
300mA
2.7
32
34
2.8
Specifications and information are subject to change without notice
700
600
500
400
300
200
30
25
20
15
10
5
0
20
20
Efficiency vs. Output Average Power vs Icq
Icc vs. Output Average Power vs. Icq
200mA
260mA
22
200mA
260mA
22
24
24
Output Power (dBm)
Freq = 2.6 GHz, T= 25ºC
Output Power (dBm)
Freq = 2.6 GHz, T= 25ºC
220mA
280mA
220mA
280mA
26
26
240mA
300mA
28
240mA
300mA
28
Page 13 of 15 May 2009
CQ
30
30
will improve
32
32
34
34