Datasheet

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
23
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
operation cycle timing (continued)
Table 3. Operation Options
MODE
CONVERSION IS INITIATED BY
MODE
CS FS CSTART
00 1. Issue new Select/Read operation to
read data and start new conversion.
2. Reconfigure the device.
1. Issue new Select/Read operation to
read data and start new conversion.
2. Reconfigure the device.
1. Issue new CSTART to start next
conversion; old data lost.
2. Issue new Select/Read operation to
read data—Issue new CSTART
to
start new conversion.
3. Reconfigure the device.
01 1. Read FIFO—Select Channel—Start
new conversion. Channel must be
selected after FIFO READ.
2. Select Channel—Start new
conversion (old data lost)
3. Configure device again.
1. Read FIFO—Select Channel—Start
new conversion. Channel must be
selected after FIFO READ.
2. Select Channel—Start new
conversion (old data lost)
3. Configure device again.
1. Read FIFO—Select channel—Start
new conversion. Channel must be
selected after FIFO READ.
2. Start new conversion (old data lost)
with existing setting.
3. Configure device again.
10 1. Read FIFO—Start new conversion
with existing setting.
2. Configure device—New conversion
(old data lost)
1. Read FIFO—Start new conversion
with existing setting.
2. Configure device—New conversion
(old data lost)
1. Read FIFO—Arm Period—Start new
conversion with existing setting
2. Configure device—Arm Period—New
conversion (old data lost)
11 1. Read FIFO—Start new conversion
with existing setting.
2. Start new conversion with the existing
setting.
3. Configure device—Start new
conversion with new setting.
1. Read FIFO—Start new conversion
with existing setting
2. Start new conversion with the existing
setting.
3. Configure Device—Start new
conversion with new setting.
1. Read FIFO—Arm Period—Start new
Conversion with existing setting
2. Start new conversion with existing
setting. (old data lost)
3. Configure device—Arm Period—New
conversion with new setting.
operation timing diagrams
The FIFO read and write CFR are nonconversion operations. The conversion operation performs one of four
types of conversion: mode 00, 01, 10, and 11
Write Cycle (WRITE CFR Command): Write cycle does not generate EOC or INT
, nor does it carry out any
conversion.
1
2
3
5
4
6
7
13 14 15 16
1
ID15 1D14 ID13 1D12
12
ID15ID11 ID10 ID9 ID4 ID3 ID2 ID1 ID0
OR
CS
FS
SDI
INT
EOC
SDO
Hi-Z
Note: Signal May Not Exist.
Don’t Care
Figure 9. Write Cycle, FS Initiates Operation