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

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

ID15

ID11

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