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參數(shù)資料
| 型號(hào)： | AD8315 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 50 dB GSM PA Controller |
| 中文描述： | 50分貝的GSM PA控制器 |
| 文件頁數(shù)： | 16/20頁 |
| 文件大?。?/td> | 1787K |
| 代理商： | AD8315 |
REV. B
AD8315
–16–
Figure 12. Layout of Component Side (MSOP)
Figure 13. Silkscreen of Component Side (MSOP)
For operation in controller mode, both jumpers, LK1 and LK2,
should be removed. The setpoint voltage is applied to V
SET
,
RFIN is connected to the RF source (PA output or directional
coupler), and V
APC
is connected to the gain control pin of the
PA. When used in controller mode, a capacitor must be installed in
C
4
for loop stability. For GSM/DCS handset power amplifiers,
this capacitor should typically range from 150 pF to 300 pF.
A quasi-measurement mode (where the AD8315 delivers an
output voltage that is proportional to the log of the input signal)
can be implemented, to establish the relationship between V
SET
and RFIN, by installing the two jumpers, LK1 and LK2. This
mimics an AGC loop. To establish the transfer function of the
log amp, the RF input should be swept while the voltage on
V
SET
is measured, that is, the SMA connector labeled VSET
now acts as an output. This is the simplest method to validate
operation of the evaluation board. When operated in this mode,
a large capacitor (0.01
m
F or greater) must be installed in C4
(filter capacitor) to ensure loop stability.
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PDF描述 |
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| AD8315-EVAL | 50 dB GSM PA Controller |
| AD8315ACP-EVAL | 50 dB GSM PA Controller |
| AD8315ACP-REEL | 50 dB GSM PA Controller |
| AD8315ACP-REEL7 | 50 dB GSM PA Controller |
| AD8315ARM | 50 dB GSM PA Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8315_06 | 制造商:AD 制造商全稱:Analog Devices 功能描述:50 dB GSM PA Controller |
| AD8315ACHIPS | 制造商:AD 制造商全稱:Analog Devices 功能描述:50 dB GSM PA Controller |
| AD8315ACP-EVAL | 制造商:Analog Devices 功能描述:EVAL BOARD GSM PA CONTR AD8 |
| AD8315ACP-REEL | 制造商:Analog Devices 功能描述: |
| AD8315ACP-REEL7 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
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