Cirrus-logic CDB42438 Manuel d'utilisateur télécharger pdf (Page 28)

CDB42438

28 DS646DB2

JUMPER PURPOSE POSITION FUNCTION SELECTED

J1 Selects source of voltage for the VA supply +3.3V

*+5V

Voltage source is +3.3 V regulator

Voltage source is +5 V regulator

AIN1-

(J26)

Selects the negative leg of the single-ended to

differential input circuit in differential mode, or a

VA/2 bias in single-ended mode.

*DIFF IN

SINGLE IN

Inverted signal from AIN1 input

VA/2 voltage bias

AIN2-

(J22)

Selects the negative leg of the single-ended to

differential input circuit in differential mode, or a

VA/2 bias in single-ended mode.

*DIFF IN

SINGLE IN

Inverted signal from AIN2 input

VA/2 voltage bias

AIN3-

(J19)

Selects the negative leg of the single-ended to

differential input circuit in differential mode, or a

VA/2 bias in single-ended mode.

*DIFF IN

SINGLE IN

Inverted signal from AIN3 input

VA/2 voltage bias

AIN4-

(J16)

Selects the negative leg of the single-ended to

differential input circuit in differential mode, or a

VA/2 bias in single-ended mode.

*DIFF IN

SINGLE IN

Inverted signal from AIN4 input

VA/2 voltage bias

J29-J36

J39-J46

Selects between an active or a passive analog

output filter for AOUT1-8.

2-Pole Active Filter

Single-Pole Passive Filter

*Default factory settings

Table 6. Jumper Settings

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 50 51

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Cirrus-logic CDB42438 Manuel d'utilisateur Page 28

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