參數(shù)資料
型號: MC72000
廠商: 飛思卡爾半導體(中國)有限公司
英文描述: Integrated Bluetooth Radio
中文描述: 集成藍牙無線
文件頁數(shù): 43/156頁
文件大?。?/td> 1782K
代理商: MC72000
MOTOROLA
MC72000
Advance Information Data Sheet
Go to: www.freescale.com
43
6.4.6 Programmable LPA
The output power of the LPA can be varied by programming PA Bias Adjust (R5/2-0) in the register map.
Table 21 displays the response of RF output power, current consumption and 2
nd
Harmonic power level
with respect to the programmable bit settings. Class 1 operations are supported through the use of an
external power amplifier not shown here. Refer to Section 10.6, “Class 1 Operation,” for more detail.
Figure 18 and Figure 19 provide additional LPA characteristic data.
The LPA also includes a ramp generator which has an exponential ramp up/ramp down function with a
maximum settling time of 20 μs. Increasing the output power exponentially is useful to avoid splattering
and minimize load pulling.
6.4.7 External Balun
The LPA provides a differential output that is converted to a single-ended signal through the use of an
inexpensive printed circuit board balun. Optionally, an external discrete balun may be used. Figure 20 and
Figure 92 show the physical dimensions and characteristics of this network. Table 22 shows the output
impedance, S22 of the PA during active and inactive cycles.
Table 21. RF Power Out vs. PA Bias Adjust
PA Bias Adjust
Output Power
(dBm)
Current
Consumption
(Continuous
Transmit)(mA
)
2
nd
Harmonic
(dBc)
R5/2
R5/1
R5/0
0
0
0
TBD
TBD
TBD
0
0
1
TBD
TBD
TBD
0
1
0
TBD
TBD
TBD
0
1
1
TBD
TBD
TBD
1
0
0
TBD
TBD
TBD
1
0
1
TBD
TBD
TBD
1
1
0
TBD
TBD
TBD
1
1
1
TBD
TBD
TBD
F
Freescale Semiconductor, Inc.
For More Information On This Product,
n
.
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