TLC3544_07 Datasheet, PDF (26/42 Pages) Texas Instruments – 5-V ANALOG, 3-/5-V DIGITAL, 14-BIT, 200-KSPS, 4-/8-CHANNELS SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH 0-5 V (PSEUDODIFFERENTIAL) INPUTS

TLC3544, TLC3548
5-V ANALOG, 3-/5-V DIGITAL, 14-BIT, 200-KSPS, 4-/8-CHANNELS SERIAL
ANALOG-TO-DIGITAL CONVERTERS WITH 0-5 V (PSEUDODIFFERENTIAL) INPUTS
SLAS266C – OCTOBER 2000 – REVISED MAY 2003
conversion operation (continued)
CS Tied to Low
Select Channel
16 SCLK
t_(sample)
Select Channel
16 SCLK
CSTART
FS
Possible
Signal
t_(convert)
SDI_{ÌÌÌÌ}^***** _{ÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌ}*_Ì* _{ÌÌÌÌÌÌÌ}
INT
EOC
OR
SDO
Previous Conversion Result
Hi-Z
Data Lost
Hi-Z
Conversion Result
Hi-Z
Possible Signal
** Select Channel
ÌÌÌÌDon’t Care
Figure 14. Mode 00, CSTART Triggers Sampling/Conversion, FS Initiates Select
CS
FS
SDI
ÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌ _SDO
ÌÌÌÌÌÌÌÌÌÌ ^{ÌÌÌ INT}
Select CH1
Select Any
Channel
Select CH2
Select Any
Channel
***
**
**
*
*
**
**
*
*
DATA1 of CH1 DATA2 of CH1
Hi-Z
1/4 FIFO FULL
DATA1 of CH2 DATA2 of CH2
1/4 FIFO FULL
Don’t Care
Possible Signal
MODE 01, FS Activates Conversion, FIFO Threshold = 1/4 Full
*** –– WRITE CFR
Read FIFO After Threshold Is Hit
** –– Select Channel
* –– FIFO Read
Figure 15. Mode 01, FS Initiates Operations
CS
FS
CSTART
SDI
ÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌ _SDO
Select CH1
***
**
Select CH2
*
*
**
*
*
Hi-Z
1/4 FIFO FULL
DATA1 of CH1 DATA2 of CH1
1/4 FIFO FULL
DATA1 of CH2 DATA2 of CH2
ÌÌ INT
Don’t Care
Possible Signal
*** –– WRITE CFR
** –– Select Channel
* –– FIFO Read
MODE 01, FS Initiates Select Period, CSTART Activates Conversion, FIFO Threshold = 1/4 Full,
Read FIFO After Threshold Is Hit
Figure 16. Mode 01, CSTART Triggers Samplings/Conversions
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