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AD82088 Datasheet(PDF) 71 Page - Elite Semiconductor Memory Technology Inc.

Part # AD82088
Description  2x20W Stereo / 1x40W Mono Digital Audio Amplifier With 30 bands EQ and DRC Functions
PDF  84 Pages
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Manufacturer  ESMT [Elite Semiconductor Memory Technology Inc.]
Direct Link  http://www.esmt.com.tw/index.asp
Logo ESMT - Elite Semiconductor Memory Technology Inc.

AD82088 Datasheet(HTML) 71 Page - Elite Semiconductor Memory Technology Inc.

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ESMT
AD82088
Elite Semiconductor Microelectronics Technology Inc.
Publication Date: Oct. 2022
Revision: 2.4
71/84
 Release threshold
After AD82088 has reached the attack threshold, its output power will be limited to that level. The output
power level will be gradually adjusted to the programmable release threshold level. Release threshold is
defined by 24-bit representation and is stored in RAM address 0X57, 0X59, 0X5B, and 0X5D of RAM bank 0.
The following table shows the attack and release threshold
’s numerical representation.
Sample calculation for attack and release threshold
Power
dB
Linear
Decimal
Hex
(3.21 format)
(PVDD^2)/R
0
1
2097152
200000
(PVDD^2)/2R
-3
0.5
1048576
100000
(PVDD^2)/4R
-6
0.25
524288
80000
((PVDD^2)/R)*L
x
L=10
(x/10)
D=2097152xL
H=dec2hex(D)
To best illustrate the power limit function, please refer to the following figure.
GAIN
Under release
threshold
Touch attack
threshold
Attack threshold
Attack threshold
Release threshold
Release threshold
Attack threshold
Attack threshold
Release threshold
Release threshold
Δ gain1
Δ gain2
Δ t1
Δ t2
Attack rate=
Δ gain1/Δt1
Release rate=
Δ
gain2/
Δt2



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