ANALOG PRODUCTS DIVISION

561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (480) 632-1715

www.protekanalog.com

PA5331

Low Power 24-Bit, Stereo Audio CODEC

With Headphone Amplifier

95250 Rev.0. 01/10

NOT FOR USE IN LIFE SUPPORT SYSTEMS

Register 18

– ADC Control 10, Default 0011 1000

Bit Name

Bit

Description

ALCSEL

7:6

00

– ALC off

01

– ALC right channel only

10

– ALC left channel only

11

– ALC stereo

MAXGAIN

5:3

Set maximum gain of PGA

000

– -6.5 dB

001

– -0.5 dB

010

– 5.5 dB

011

– 11.5 dB

100

– 17.5 dB

101

– 23.5 dB

110

– 29.5 dB

111

– 35.5 dB

MINGAIN

2:0

Set minimum gain of PGA

000

– -12 dB

001

– -6 dB

010

– 0 dB

011

– +6 dB

100

– +12 dB

101

– +18 dB

110

– +24 dB

111

– +30 dB

Register 19

– ADC Control 11, Default 1011 0000

Bit Name

Bit

Description

ALCLVL

7:4

ALC target

0000

– –22.5dBFS

0001

– –21.0dBFS

……

1100

– –4.5dBFS

1101

– –3dBFS

1110

– –1.5dBFS

1111

– –1.5dBFS

ALCHLD

3:0

ALC hold time before gain is increased

0000

– 0ms

0001

– 2.67ms

0010

– 5.33ms

…… (time doubles with every step)

1001

– 0.68s

1010 or higher

– 1.36s

Register 20

– ADC Control 12, Default 0011 0010

Bit Name

Bit

Description

ALCDCY

7:4

ALC decay (gain ramp up) time, ALC mode/limiter mode:

0000

– 410 us/90.8 us

0001

– 820 us/182us

0010

– 1.64 ms/363us

…… (time doubles with every step)

1001

– 210 ms/46.5 ms

1010 or higher

– 420 ms/93 ms

ALCATK

3:0

ALC attack (gain ramp down) time, ALC mode/limiter mode:

0000

– 104 us/22.7 us

0001

– 208 us/45.4 us

0010

– 416 us/90.8 us

…… (time doubles with very step)

1001

– 53.2 ms/11.6 ms

1010 or higher

– 106 ms/23.2 ms