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AD82587D Datasheet(PDF) 39 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) 39 Page - Elite Semiconductor Memory Technology Inc.

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ESMT
AD82587D
Elite Semiconductor Memory Technology Inc.
Publication Date: Jan. 2018
Revision: 1.6
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 Address 0X20 : Top 8 bits of DRC energy coefficient
BIT
NAME
DESCRIPTION
VALUE
FUNCTION
B[7:0]
DRC_ECT [7:0]
Top 8 Bits of DRC
Energy Coefficient
X
User programmed
00000000
1/256
 Address 0X21 : Bottom 8 bits of DRC energy coefficient
BIT
NAME
DESCRIPTION
VALUE
FUNCTION
B[7:0]
DRC_ECB
[7:0]
Bottom 8 Bits of DRC
Energy Coefficient
X
User programmed
00010000
1/256
x2[n]
DRC_EC
Z-1
xrms[n]
1-DRC_EC
The above figure illustrates the digital processing of calculating RMS signal power. In this processing, a DRC
energy coefficient is required, which can be programmed for different frequency range. Energy coefficient is
defined by 16-bit representation composed of registers controlled by I2C. The device addresses of DRC energy
coefficient are 0X20, and 0X21. The following table shows the DRC energy coefficient numerical representation.
Sample calculation for DRC energy coefficient
DRC energy
coefficient
dB
Linear
Decimal
Hex
(1.12 format)
1
0
1
4095
FFF
1/256
-48.2
1/256
16
10
1/1024
-60.2
1/1024
4
4
L
x
L=10
(x/20)
D=4095xL
H=dec2hex(D)



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