AD82088 datasheet(68/84 Pages) ESMT

68 / 84 page

ESMT

AD82088

Elite Semiconductor Microelectronics Technology Inc.

Publication Date: Oct. 2022

Revision: 2.4

68/84

 User-defined equalizer

The AD82088 provides 30 parametric Equalizer (EQ). User can program suitable coefficients via I

2C control

interface to program the required audio band frequency response for every EQ. The transfer function

The data format of 2

’s complement binary code for EQ coefficient is 3.21. i.e., 3-bits for integer (MSB is the

sign bit) and 21-bits for mantissa. Each coefficient range is from 0x800000 (-4) to 0x7FFFFF

(+3.999999523). These coefficients are stored in User Defined RAM and are referenced in following

manner:

Where x and y represents the number of channel and the band number of EQ biquard.

All user-defined filters are path-through, where all coefficients are defaulted to 0 after being powered up,

except the A0 that is set to 0x200000 which represents 1.

 EQ arrangement

AD82088 provide 15 EQ per channel.

When, register with address-0X0C, bit-5, DEQE is set to high, the EQ-7, EQ-8, EQ9, and EQ10 will use

another filter coefficient stored in used defined RAM 0X68~0X7B.

When, register with address-0X0C, bit-6, BTE is set to high, the EQ-11 and EQ-12 will perform as bass and

treble respectively.

When three bands DRC enable, EQ-13, EQ-14, and EQ-15 will perform as APF, LPF, and HPF respectively.

)

(







CHxEQyB

CHxEQyA









AD82088 Datasheet(PDF) 68 Page - Elite Semiconductor Memory Technology Inc.