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AD52070 データシート(PDF) 21 Page - Elite Semiconductor Memory Technology Inc.

部品番号 AD52070
部品情報  2x30W Stereo / 1x60W Mono Class-D Audio Amplifier With Low Idle Current and AGC
PDF  33 Pages
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メーカー  ESMT [Elite Semiconductor Memory Technology Inc.]
ホームページ  http://www.esmt.com.tw/index.asp
Logo ESMT - Elite Semiconductor Memory Technology Inc.

AD52070 データシート(HTML) 21 Page - Elite Semiconductor Memory Technology Inc.

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ESMT
AD52070
Elite Semiconductor Microelectronics Technology Inc.
Publication Date: Oct. 2021
Revision: 1.1
21/33
655ms/dB in AGC mode-Medium or 1311ms/dB in AGC mode-Slow, which is the
predefined release time. The AGC gain adjustment is applied with a ramp speed
selectable by the LIMRATE pin setting.
Figure.1 Waveform of output signal without clipping by rail
Figure.2 Waveform of output signal with clipping by rail
Attack Time
Release Time
Figure.3 Waveform of output signal with AGC ON
Table 2. AGC and Power limit Setting
LIMRATE Voltage
Mode
AGC attack rate
TFB attack
rate
AGC/TFB
release rate
GVDD
Fast (AGC)
0.32 ms/dB
164 ms/dB
328 ms/dB
2/3*GVDD
Medium (AGC)
2.56 ms/dB
326 ms/dB
655 ms/dB
1/3*GVDD
Slow (AGC)
5.12 ms/dB
655 ms/dB
1311 ms/dB
GND
PLIMIT
Disable
Disable
Disable
AGC function can not only automatically adjust system gain, but also further limit output
power of the amplifier without clipping. Figure 4 shows the output waveform with AGC
function. The limiter threshold set by the PLIMT pin voltage.
Attack Time
Release Time
Figure.4 Waveform of output signal with AGC



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