Datasheet
EOC
(activelow)
CONVST =1
FS/CS
INT
(activelow)
SCLK
AUTOTRIGGER/READWhileConverting
(useinternalCCLK,EOC,and polarityprogrammedasactivelow)
INT
SDO
SDI
EO
S
Nth
N - 1st
1……………………16
1101b
READResult
1……………………16
N - 2nd
EOC
EO
S
EO
C
t
SAMPLE2
=
3CCLKs
t
SAMPLE2
=
3CCLKs
N - 1th
EOS
1101b
READResult
t
4
t
3
t
CONV
=18CCLKs t
CONV
=18CCLKs
Nth
Nth+1
SCLK
FS/CS
SDO
SDIor DC I
t
H1
t
7
1 2 3 4 11 14 15 16
MSB MSB 1- MSB 2-
MSB 3-
LSB
t
6
t
D2
t
S1
LSB+4 LSB+2
LSB+3
LSB+1 LSBMSB MSB 1- MSB 2-
MSB 3-
t
H2
t
D1
t
D3
t
SCLK
t
SCLKH
t
SCLKL
1312
LSB+1
LSB+5
ADS7229
ADS7230
www.ti.com
............................................................................................................................................................... SBAS437A – MAY 2008 – REVISED JUNE 2009
Figure 3. Timing for Conversion and Acquisition Cycles for Autotrigger (Read While Converting)
Figure 4. Detailed SPI Transfer Timing
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