Datasheet

1
20
CLOCK
CONVST
and RD
SDOA
(1)
BUSY
16-bit data 2n -
CHAx
1
1
20
16-bit data n
CHA0
16-bit data n
CHB0
Conversion n
of both CH 0x
16-bit data n + 1
CHA1
Conversion n + 1
of both CH 1x
20
1
20
1
16-bit data n 1-
CHBx
20
1
no conversion
read access only
M0
every 2nd CONVST
is ignored
every 2nd CONVST
is ignored
no conversion
read access only
A
D
A
C
H
x
no conversion
read access only
M1
A
D
B
C
H
x
A
D
A
C
H
0
A
D
B
C
H
0
A
D
A
C
H
1
ADS8363
ADS7263
ADS7223
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SBAS523B OCTOBER 2010REVISED JANUARY 2011
Fully-Differential Mode IV (Half-Clock Mode Only)
Full-clock mode is not supported in this operational
mode.
In the same way as Mode II, Mode IV uses the SDOA
output line exclusively to transmit data while the
Channel information is available in fully-differential
differential channels are switched automatically.
mode if CID = '0'. In pseudo-differential mode, the
Following the first conversion after M1 goes high, the
sequencer controls the channel selection in this mode
SDOB output 3-states, as shown in Figure 38.
and must be set appropriately using the SEQFIFO
register. The internal FIFO is not available in this
Output data consist of a channel indicator ('0' for
mode.
CHx0, or '1' for CHx1), followed by the ADC indicator
('0' for CHAx or '1' for CHBx), and then 16 or 14 bits
Changes to CONFIG register bits FE, SR, PDE, and
of conversion result, ending with '00' for the
CID are active with the start of the next conversion
ADS8363, '0000' for the ADS7263, or '000000' for the
with a delay of one read access.
ADS7223.
The register settings should be updated using every
CONVST and RD signals must not be longer than
other RD pulse (aligned either with the one starting
one clock cycle to ensure proper functionality and
the conversion or the one to read the conversion
avoid corruption of output data.
results of channel B; compare with Figure 35).
(1) ADS7263/7223 output data with the MSB located as ADS8363 and the last 2/4 bits being '0'.
Figure 38. Fully-Differential Mode IV Timing
(M0 = '1', M1 = '1', PDE = '0', and CID = '0' Example)
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