ADAV802_15 datasheet(51/53 Pages) AD

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Preliminary Technical Data

ADAV802

Rev. Pr G | Page 51 of 53

Table 88. ALC Control Register 1

FSSEL1-0

GAINCNTR1-0

RECMODE1-0

LIMDET

ALCEN

7,6

5,4

3,2

ADDRESS = 1111011

Default = 0x00

These bits should equal the sample rate of the ADC

FSSEL1-0

00 = 96 kHz

01 = 48 kHz

10 = 32 kHz

11 = Reserved

These bits determine the limit of the counter used in Limited Recovery Mode

GAINCNTR1-0

00 = 3

01 = 7

10 = 15

11 = 31

RECMODE1-0

These bits determine which recovery mode is used by the ALC section

00 = No Recovery

01 = Normal Recovery

10 = Limited Recovery

11 = Reserved

LIMDET

Limit Detect Mode

0 = ALC is used when either channel exceeds the set limit

1 = ALC is used only when both channels exceed the set limit

ALCEN

ALC Enable

0 = Disable ALC

1 = Enable ALC

Table 89. ALC Control Register 2

RES

RECTH1-0

ATKTH1-0

RECTIME1-0 ATKTIME

6,5

4,3

2,1

ADDRESS = 1111100

Default = 0x52

RECTH1-0

Recovery Threshold

00 = -2 dB

01 = -3 dB

10 = -4 dB

11 = -6 dB

ATKTH1-0

Attack Theshold

00 = 0 dB

01 = -1 dB

10 = -2 dB

11 = -4 dB

RECTIME1-0

Recovery Time Selection

00 = 32 ms

01 = 64 ms

10 = 128 ms

11 = 256 ms

ATKTIME

Attack Timer Selection

0 = 1 ms

1 = 4 ms

ADAV802 Datasheet(PDF) 51 Page - Analog Devices

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