Datasheet

Note:olddatashown.
CONFIGURE
READResult READResult
EOS
EOC EOS
Nth
Nthfrom#1
Nthfrom#1
Nthfrom#1
N − 1thfrom#2
Nthfrom#3
N − 1thfrom#2
1110............ 1101b
1101b
1..................16
1 ..................16 1..................16
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Cascaded ManualTrigger/ReadWhileSampling
(UseinternalCCLK,EOCactivelowand activelow)
heldlowduringtheNtimes16bitstransfercycle.
INT
CS
CONVST #1,
CONVST #3
CONVST #2=1
EOC#1
(activelow)
INT #1
(active low)
SCLK#1,
SCLK#2,
SCLK#3
SDO#1,
CDI#2
SDO#2,
CDI#3
SDO#3
SDI#1,
SDI#2,
SDI#3
CS/FS#1
CS/FS#2,
CS/FS#3
t
CONV
=18CCLKs
t
SAMPLE1
=3CCLKsmin
t
d(CSR-EOS)
=20nsmin
t
d(CSR-EOS)
=20nsmin
t
d(SDO-CDI)
t
d(SDO-CDI)
ADS8329
ADS8330
www.ti.com ................................................................................................................................................... SLAS516C – DECEMBER 2006 – REVISED JULY 2009
Figure 62. Simplified Cascade Timing (Separate CONVST)
The number of SCLKs required for a serial read cycle depends on the combination of different read modes, TAG
bit, chain mode, and the way a channel is selected (that is, auto channel select). This is listed in Table 6 .
Table 6. Required SCLKs For Different Read Out Mode Combinations
CHAIN MODE AUTO CHANNEL NUMBER OF SCLK PER SPI
ENABLED CFR.D5 SELECT CFR.D11 TAG ENABLED CFR.D1 READ TRAILING BITS
0 0 0 16 None
0 0 1 ≥ 17 MSB is TAG bit plus zero(s)
0 1 0 16 None
0 1 1 ≥ 17 TAG bit plus 7 zeros
1 0 0 16 None
1 0 1 24 TAG bit plus 7 zeros
1 1 0 16 None
1 1 1 24 TAG bit plus 7 zeros
Copyright © 2006 – 2009, Texas Instruments Incorporated Submit Documentation Feedback 35
Product Folder Link(s): ADS8329 ADS8330