ADS7863 Datasheet, PDF (21/43 Pages) Burr-Brown (TI) – Dual, 1.5MSPS, 12-Bit, 2 + 2 Channel, Simultaneous Sampling ANALOG-TO-DIGITAL CONVERTER

ADS7863
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MODE III
With M0 set to '1' and M1 = '0', the ADS7863
automatically cycles between the differential inputs
(ignoring the SDI register bits C[1:0]) while offering
the conversion result of CHAx on SDOA and the
conversion result of CHBx on SDOB (see Figure 34).
1
CLOCK
16 1
SBAS383E – JUNE 2007 – REVISED JANUARY 2011
Output data consist of a channel indicator ('0' for
CHx0 or '1' for CHx1), followed by a '0', 12 bits of
conversion results, and another '00'.
16
CONVST
SDI
C[1:0] is ignored
P[1:0] = ‘00’ ® SDI features are not used
M0
Both channel 0s are converted first,
followed by conversion of both channel 1s.
M1
RD
C[1:0] is ignored
P[1:0] = ‘11’ ® SDI features are not used
C[1:0] is ignored
P[1:0] = ‘11’ ® SDI features are not used
CS
SDOA
SDOB
Previous 12-Bit Data CHAx
Previous 12-Bit Data CHBx
CH0
12-Bit Data CHA0
CH0
12-Bit Data CHB0
CH1
CH1
12-Bit Data CHA1
12-Bit Data CHB1
BUSY
Previous Conversion of Both CHxx
Conversion of Both CHx0
Conversion of Both CHx1
0ms
0.5ms
1.0ms
Figure 34. Mode III Timing Diagram (M0 = 1; M1 = 0)
Copyright © 2007–2011, Texas Instruments Incorporated
Product Folder Link(s): ADS7863
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