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AD82587D Datasheet(PDF) 34 Page - Elite Semiconductor Memory Technology Inc.

Part # AD82587D
Description  2X20W Stereo / 1X40W Mono Digital Audio Amplifier
PDF  45 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.

AD82587D Datasheet(HTML) 34 Page - Elite Semiconductor Memory Technology Inc.

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ESMT
AD82587D
Elite Semiconductor Memory Technology Inc.
Publication Date: Jan. 2018
Revision: 1.6
34/45
 Address 0X13 : Top 8 bits of power clipping
The AD82587D provides power clipping function to avoid excessive signal that may destroy loud speaker.
The power clipping level is defined by 21-bit representation composed of registers controlled by I2C. The
device addresses of power clipping threshold are 0X13, 0X14, and 0X15.
BIT
NAME
DESCRIPTION
VALUE
FUNCTION
B[7:5]
X
Reserved
B[4:0]
PCT[4:0]
Top 5 Bits of Power
Clipping Level
X
User programmed
01000
0dB
 Address 0X14 : Middle 8 bits of power clipping
BIT
NAME
DESCRIPTION
VALUE
FUNCTION
B[7:0]
PCM[7:0]
Middle 8 Bits of Power
Clipping Level
X
User programmed
00000000
0dB
 Address 0X15 : Bottom 8 bits of power clipping level
BIT
NAME
DESCRIPTION
VALUE
FUNCTION
B[7:0]
PCB[7:0]
Bottom 8 Bits of Power
Clipping Level
X
User programmed
00000000
0dB
The following table shows the power clipping level
’s numerical representation.
Sample calculation for power clipping
Max
amplitude
dB
Linear
Decimal
Hex
(2.19 format)
PVDD
0
1
524288
80000
PVDD*0.707
-3
0.707
370727
5A827
PVDD*0.5
-6
0.5
262144
40000
PVDD*L
x
L=10
(x/20)
D=524288xL
H=dec2hex(D)



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