PA5750 datasheet(16/30 Pages) PROTEC

16 / 30 page

PA5750

Low Power Stereo Audio CODEC

With Speaker and Headphone Amplifier.

ANALOG PRODUCTS DIVISION

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

www.protekanalog.com

Not for use in any life support systems.

95230 Rev.0. 04/09

6.2.12. Register20 – 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 µS/90.8 µS

0001 – 820 µS/182 µS

0010 – 1.64 mS/363 µS

………. time doubles with every step.

1001 – 210 mS/182 µS

1010 or higher – 420 mS

ALCATK

3:0

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

0000 – 104 µS/22 µS

0001 – 208 µS/45.4 µS

0010 – 416 µS/90 µS

……time doubles with every step

1001 – 53.2 mS/11.6 mS

1010 or higher – 106 mS/23.2 mS

6.2.13. Register21 – ADC Control 13, Default 0000 0110

Bit Name

Bit

Description

ALCMODE

Determines the ALC mode of operation:

0 – ALC mode (normal operation)

1 – limiter mode

ALCZC

ALC uses zero cross detection circuit.

0 – disable (recommended).

1 - enable

TIME_OUT

Zero Cross time out:

0 – disable (default)

1 – enable.

WIN_SIZE

4:0

window size for peak detector, ste the window size to N*16 samples:

00110 – 96 samples (default)

00111 – 102 samples

……

11111 – 496 samples

6.2.14. Register22 – ADC Control 14, Default 0000 0000

Bit Name

Bit

Description

NGTH

7:3

Noise gate threshold:

00000 – -76.5dBFS.

00001 - -75dBFS.

……

11110 - -31.5dBFS.

11111 - -30dBFS.

NGG

2:1

Noise gate type.

x0 – PGA gain held constant.

01 – mute ADC output.

11 – reserved.

NGAT

Zero Cross time out:

0 – disable (default)

1 – enable.

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