SSM2529ACBZ-R7 datasheet(20/52 Pages) AD

20 / 52 page

SSM2529

Data Sheet

Rev. 0 | Page 20 of 52

Table 23. DRC_CURVE1 Register

Reserved

DRC_LT[6:0]

Table 24. Bit Description of DRC_CURVE1 Register

Bit Name

Description

Settings

DRC_LT[6:0]

DRC limiter threshold

0000000: +6 dB

0000001: +5.5 dB

−0.5 dB step to

1010000: −35 dB

Table 25. DRC_CURVE2 Register

Reserved

DRC_CT[6:0]

Table 26. Bit Description of DRC_CURVE2 Register

Bit Name

Description

Settings

DRC_CT[6:0]

DRC compressor

threshold

0000000: +6 dB

0000001: +5.5 dB

−0.5 dB step to

1010000: −35 dB

Table 27. DRC_CURVE3 Register

Reserved

DRC_SMAX[6:0]

Table 28. Bit Description of DRC_CURVE3 Register

Bit Name

Description

Settings

DRC_SMAX[6:0]

DRC maximum output

signal amplitude

0000000: +6 dB

0000001: +5.5 dB

−0.5 dB step to

1010000: −35 dB

Table 29. DRC_CURVE4 Register

DRC_NT[3:0]

DRC_ET[3:0]

Table 30. Bit Description of DRC_CURVE4 Register

Bit Name

Description

Settings

DRC_NT[3:0]

DRC noise gating threshold

0000: −51 dB

0001: −54 dB

−3 dB step to

1111: −96 dB

DRC_ET[3:0]

DRC expander threshold

0000: −36 dB

0001: −39 dB

−3 dB step to

1111: −81 dB

Table 31. DRC_CURVE5 Register

Reserved

DRC_SMIN[3:0]

Table 32. Bit Description of DRC_CURVE5 Register

Bit Name

Description

Settings

DRC_SMIN[3:0]

DRC minimum output signal

level

0000: −51 dB

0001: −54 dB

−3 dB step to

1111: −96 dB

DRC Gain Smooth

Before the gain calculated by the static curve function multiplies

with the input signal, smooth it to ensure that it does not change

rapidly for this can lead to noise.

The gain smooth is affected by its attack and decay time

parameters. The attack time can vary from 0 ms to 1.536 sec,

while the decay time can vary from 0 ms to 24.576 sec. The

corresponding bits are DRC_ATT and DRC_DEC and can be

found in Register 0x58.

Table 33. DRC_CTRL3 Register

DRC_ATT[3:0]

DRC_DEC[3:0]

Table 34. Bit Description of DRC_CTRL3 Register

Bit Name

Description

Settings

DRC_ATT[3:0]

DRC attack time

0000: 0 ms

0001: 0.1 ms

0010: 0.19 ms

0011: 0.37 ms

0100: 0.75 ms

0101: 1.5 ms

0110: 3 ms

0111: 6 ms

…

1111: 1.536 sec

DRC_DEC[3:0]

DRC decay time

0000: 0 ms

0001: 1.5 ms

0010: 3 ms

0011: 6 ms

0100: 12 ms

…

1111: 24.576 sec

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