AS3525 datasheet(141/194 Pages) AMSCO

141 / 194 page

AS3525-A/-B C22O22

Data Sheet, Confidential

www.austriamicrosystems.com

Revision 1.13

141

- 194

7.4.9

Audio Line Inputs (2x)

7.4.9.1

General

The chip features includes two identical line inputs. The blocks can work in mono differential, 2x mono single ended or in stereo single ended mode.

The volume control has an independent gain regulation for left and right channel with 32 steps @ 1.5dB each. The gain can be set from –34.5dB to

+12dB. The stage is set to mute by default. If the line input is not enabled, the volume settings are set to their default values. Changing the volume

and mute control can only be done after enabling the input.

Figure 53 Line Inputs

Stereo Mode

Mono Single Ended Mode

Mono Differential Mode

7.4.9.2

Parameter

Figure 54 Line Input Parameter

Symbol

Parameter

Notes

Min

Typ

Max

Unit

Gain

programmable gain

-34.5

Gain Step-Size

1.5

Mute

kOhm

RinLINE

Input Resistance

Min Gain, single ended stereo

100

kOhm

SNR

Signal to Noise Ratio

Mute Attenuation

120

BVDD = 3.3V, TA= 25oC, fs=48kHz unless otherwise mentioned

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