TLC2578IDWR Datasheet, PDF (30/49 Pages) Texas Instruments – 5-V ANALOG 3-5V DIGITAL 14-12BIT 200-KSPS 4-8CHANNEL SERIAL ANALOG-TO-DIGITAL CONVERTERS WITH

TLC3574, TLC3578, TLC2574, TLC2578
5ĆV ANALOG, 3Ć/5ĆV DIGITAL, 14Ć/12ĆBIT, 200ĆKSPS, 4Ć/8ĆCHANNEL
SERIAL ANALOGĆTOĆDIGITAL CONVERTERS WITH ±10ĆV INPUTS
SLAS262C − OCTOBER 2000 − REVISED MAY 2003
conversion operation (continued)
Configure
CS
Conversion
From CH0
Conversion
From CH3
Conversion
From CH0
Conversion
From CH3
FS
SDI
ÌÌ_***ÌÌÌÌÌÌ_**ÌÌÌÌ_**ÌÌÌÌ_**ÌÌÌÌ_**ÌÌÌÌÌÌ_* ÌÌÌÌ_* ÌÌÌÌ_* ÌÌ_*ÌÌÌÌ_**ÌÌÌÌ_**ÌÌÌÌ_** ÌÌÌÌ_** ÌÌÌÌ_* ÌÌ
INT
ÌÌ ^SDO
Hi-Z
1st Sweep
ÌÌ_{Don’t Care}
ÌÌ^{*** Command = Configure Write for Mode 10, FIFO}
Threshold = 1/2 Full, Sweep Sequence: 0−1−2−3
CH0
CH1
CH2
CH3
1st FIFO Read
2nd Sweep
Using Existing
Configuration
Read FIFO After FIFO Threshold Is Hit
CH0
2nd FIFO Read
** COMMAND = Select Any Channel
* COMMAND = Read FIFO
Figure 16. Mode 10, FS Initiates Operations
CS Tied
to Low
FS
Configure
Conversion
From CH0
Conversion
From CH2
Conversion
From CH0
Conversion
From CH2
CSTART
Ì ÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌ ÌÌÌÌÌÌÌÌÌÌ SDI
INT
*** **
ÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌ _SDO
Hi-Z
1st Sweep
ÌÌÌÌÌ ^ÌÌ Don’t Care
ÌÌ_{*** Command = Configure Write for Mode 10, FIFO}
*
*
*
* **
*
CH0
CH0
CH2
CH2
1st FIFO Read
2nd Sweep
Using Existing
Configuration
CH0
2nd FIFO Read
Read FIFO After FIFO Threshold Is Hit, FS Initiates Select Period
Threshold = 1/2 Full, Sweep Sequence: 0−0−2−2
** COMMAND = Select Any Channel
* COMMAND = Read FIFO
Figure 17. Mode 10, CSTART Initiates Operations
Configure Conversion
From CH0
Conversion Conversion
From CH3 From CH0
Conversion
From CH3
Conversion
From CH0
CS
START 2nd Round SWEEP CONVERSION,
FS=High
the DATA of the 1st Round Are Lost
ÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌ ÌÌÌÌÌÌÌÌÌÌ ^{SDI ***}
**
**
**
**
**
**
**
**
*
*
*
*
**
INT
ÌÌ _SDO
ÌÌÌÌ^{Don’t Care}
ÌÌ
CH0
CH1
CH2
CH3
READ the DATA of 2nd
Sweep From FIFO
*** Command = Configure Write for Mode 11, FIFO
Threshold = 1/2 Full, Sweep Sequence: 0−1−2−3
** COMMAND = Select Any Channel
START 2nd Sweep conversion immediately (NO FIFO READ) after the 1st SWEEP completed.
* COMMAND = Read FIFO
Figure 18. Mode 11, CS Initiates Operations
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