THS1007

SLAS286A – AUGUST 2000– REVISED DECEMBER 2002

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23

ANALOG INPUT CHANNEL SELECTION

The analog input channels of the THS1007 can be selected via bits 3 to 7 of control register 0. One single

channel (single-ended or differential) is selected via bit 3 and bit 4 of control register 0. Bit 5 controls the

selection between single-ended and differential configuration. Bit 6 and bit 7 select the autoscan mode, if more

than one input channel is selected. Table 10 shows the possible selections.

Table 9. Analog Input Channel Configurations

BIT 7

SCAN

BIT 6

DIFF1

BIT 5

DIFF0

BIT 4

CHSEL1

BIT 3

CHSEL0

DESCRIPTION OF THE SELECTED INPUTS

0

0

0

0

0

Analog input AINP (single ended)

0

0

0

0

1

Analog input AINM (single ended)

0

0

0

1

0

Analog input BINP (single ended)

0

0

0

1

1

Analog input BINM (single ended)

0

0

1

0

0

Differential channel (AINP–AINM)

0

0

1

0

1

Differential channel (BINP–BINM)

1

0

0

0

1

Autoscan two single ended channels: AINP, AINM, AINP,

…

1

0

0

1

0

Autoscan three single ended channels: AINP, AINM, BINP, AINP,

…

1

0

0

1

1

Autoscan four single ended channels: AINP, AINM, BINP, BINM, AINP,

…

1

0

1

0

1

Autoscan one differential channel and one single ended channel AINP,

(BINP–BINM), AINP, (BINP–BINM),

…

1

0

1

1

0

Autoscan one differential channel and two single ended channel AINP,

AINM, (BINP–BINM), AINP,

…

1

1

0

0

1

Autoscan two differential channels (AINP–AINM), (BINP–BINM),

(AINP–AINM),

…

0

0

1

1

0

Reserved

0

0

1

1

1

Reserved

1

0

0

0

0

Reserved

1

0

1

0

0

Reserved

1

0

1

1

1

Reserved

1

1

0

0

0

Reserved

1

1

0

1

0

Reserved

1

1

0

1

1

Reserved

1

1

1

0

0

Reserved

1

1

1

0

1

Reserved

1

1

1

1

0

Reserved

1

1

1

1

1

Reserved