AD82587D datasheet(39/45 Pages) ESMT

39 / 45 page

ESMT

AD82587D

Elite Semiconductor Memory Technology Inc.

Publication Date: Jan. 2018

Revision: 1.6

39/45

 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

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

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

Linear

Decimal

Hex

(1.12 format)

4095

FFF

1/256

-48.2

1/256

1/1024

-60.2

1/1024

L=10

(x/20)

D=4095xL

H=dec2hex(D)

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