PCM3793A datasheet(44/68 Pages) BURR-BROWN

Part #	PCM3793A

Description	16-Bit, Low-Power Stereo Audio CODEC With Microphone Bias, Headphone, and Digital Speaker Amplifier

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Manufacturer	BURR-BROWN [Burr-Brown (TI)]

Direct Link	http://www.burr-brown.com

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Attack

Recovery

+FS

–FS

+FS

–FS

Input Data

Output Data

Attack Time

Recovery Time

+FS

–FS

+FS

–FS

Input Data

Output Data

T0166-01

PCM3793A

PCM3794A

SLAS529A – JANUARY 2007 – REVISED FEBRUARY 2007

Register 83

B15

B14

B13

B12

B11

B10

B9

B8

B7

B6

B5

B4

B3

B2

B1

B0

Register 83

0

IDX6

IDX5

IDX4

IDX3

IDX2

IDX1

IDX0

RALC

RSV

RRTC

RATC

RCP1

RCP0

RLV1

RLV0

IDX[6:0]: 101 0011b (53h): Register 83

RALC: Automatic Level Control (ALC) Enable for Recording

Default value: 0

Automatic level control can be enabled with some parameters for microphone input or lower analog source level.

RALC = 0

Disable (default)

RALC = 1

Enable

RRTC: ALC Recovery Time Control for Recording

Default value: 0

This bit is used to select the recovery time for the ALC. The response is shown in Figure 37.

RRTC = 0

3.4 s (default)

RRTC = 1

13.6 s

RATC: ALC Attack Time Control for Recording

Default value: 0

This bit is used to select the attack time for the ALC. The response is shown in Figure 37.

RATC = 0

1 ms (default)

RATC = 1

2 ms

Figure 37. Attack and Recovery Time Response

44

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PCM3793A Datasheet(PDF) 44 Page - Burr-Brown (TI)

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