Datasheet

ADS8634

ADS8638

SBAS541A –MAY 2011– REVISED AUGUST 2011

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Ch0-1 Range to Ch6-7 Range: Range Selection Registers for Channels 0 to 7

(Address = 10h to 13h; Page 0)

Ch0-1 Range 10h 0 Range Select Ch0[2:0] 0 Range Select Ch1[2:0]

Ch2-3 Range 11h 0 Range Select Ch2[2:0] 0 Range Select Ch3[2:0]

Ch4-5 Range 12h 0 Range Select Ch4[2:0] 0 Range Select Ch5[2:0]

Ch6-7 Range 13h 0 Range Select Ch6[2:0] 0 Range Select Ch7[2:0]

A selection of signal ranges are featured for each channel. The selected range is automatically assigned for a

channel during conversion, regardless of the channel scan mode (auto or manual). These registers (Ch0-1

Range to Ch6-7 Range) allow for range selection of all channels.

Bit 7 Must always be set to '0'

Bits[6:4] Range Select Chn[2:0]

These bits select the signal range for channel n, where n is 0, 2, 4, or 6, depending on the register address.

000 = Reserved; do not use this setting

001 = Range is set to ±10V

010 = Range is set to ±5V

011 = Range is set to ±2.5V

100 = Reserved; do not use this setting

101 = Range is set to 0V to 10V

110 = Range is set to 0V to 5V

111 = Reserved; do not use this setting

Bit 3 Must always be set to '0'

Bits[2:0] Range Select Chm[2:0]

These bits select the signal range for channel m, where m is 1, 3, 5, or 7, depending on the register address.