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参数资料
| 型号： | MC13180 |
| 厂商： | MOTOROLA INC |
| 元件分类： | 通信及网络 |
| 英文描述： | 2.4 GHz Low Power Wireless Transceiver IC for Bluetooth⑩ Applications |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQCC48 |
| 封装： | PLASTIC, QFN-48 |
| 文件页数： | 45/58页 |
| 文件大小： | 992K |
| 代理商： | MC13180 |
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Functional Description
MOTOROLA
MC13180
Product Preview
45
amplifier (LPA) drives a balanced ramp up/ramp down generator, which is fed to a “Balun” to provide a
single
-
ended output for the external antenna switch. The transmit start up/warm down sequences are shown
in Figure 38.
4.36 Programmable LPA
The output power of the LPA can be varied by programming PA Bias Adjust (R5/2
-
0) in the register map.
Table 22 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 Applications Information Class 1 Operation for more
detail. Figures 35 and 36 provide additional LPA characteristic data.
4.37 Ramp Generator
The ramp generator has an exponential ramp up/ramp down function with a maximum settling time of 20
μ
s. Increasing the output power exponentially is useful to avoid splattering and minimize load pulling.
4.38 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. Figures 37
and 42 show the physical dimensions and characteristics of this network.
Table 23 shows the output impedance, S22 of the PA during active and inactive cycles.
Table 22.
RF Power Out versus PA Bias Adjust
PA Bias Adjust
Output Power
(dBm)
Current
Consumption
(Continuous
Transmit)(mA
)
2nd Harmonic
(dBc)
R5/2
R5/1
R5/0
0
0
0
-0.9
23
-21
0
0
1
-10.8
20
-29
0
1
0
1.9
27
-19
0
1
1
-7.6
22
-24
1
0
0
5.3
33
-18
1
0
1
-3.5
27
-18
1
1
0
6.1
40
-20
1
1
1
3.5
35
-14
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