Datasheet

ADS8634
ADS8638
SBAS541A –MAY 2011– REVISED AUGUST 2011 www.ti.com
Ch0 Range to Ch3 Range: Range Selection Registers for Channels 0 to 3 (Address = 10h to 13h; Page 0)
REGISTER ADDRESS ON PAGE 0 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Ch0 Range 10h 0 Range Select Ch0[2:0] 0 X
(1)
X X
Ch1 Range 11h 0 Range Select Ch1[2:0] 0 X X X
Ch2 Range 12h 0 Range Select Ch2[2:0] 0 X X X
Ch3 Range 13h 0 Range Select Ch3[2:0] 0 X X X
(1) X = don't care.
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 Range
to Ch3 Range) allow for selection of ranges for 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, 1, 2, or 3, 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'
Bit 2 : 0 Don't care (can be 1 or 0); this bit has no function assigned
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