TLV1543C, TLV1543I, TLV1543M

3.3V 10BIT ANALOGTODIGITAL CONVERTERS

WITH SERIAL CONTROL AND 11 ANALOG INPUTS

SLAS072E − DECEMBER 1992 − REVISED JANUARY 2004

7

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converter and analog input (continued)

SC

Threshold

Detector

Node 512

REF −

REF+

ST

512

VI

To Output

Latches

REF −

ST

REF+

REF −

ST

REF+

REF −

ST

REF+

REF −

ST

REF+

REF −

ST

REF+

REF −

ST

REF+

REF −

ST

REF −

ST

1

1

2

4

8

16

128

256

Figure 1. Simplified Model of the Successive-Approximation System

chip-select operation

The trailing edge of CS starts all modes of operation, and CS can abort a conversion sequence in any mode.

A high-to-low transition on CS within the specified time during an ongoing cycle aborts the cycle, and the device

returns to the initial state (the contents of the output data register remain at the previous conversion result).

Exercise care to prevent CS from being taken low close to completion of conversion because the output data

can be corrupted.

reference voltage inputs

There are two reference inputs used with these devices: REF + and REF −. These voltage values establish the

upper and lower limits of the analog input to produce a full-scale and zero-scale reading respectively. The values

of REF +, REF −, and the analog input should not exceed the positive supply or be lower than GND consistent

with the specified absolute maximum ratings. The digital output is at full scale when the input signal is equal

to or higher than REF + and at zero when the input signal is equal to or lower than REF −.

−0.5 V to 6.5 V

. . . . . . . . . . . . . . . . . . . . . . . . . .

TLV1543M

−0.5 V to 6 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

−0.1 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

±20 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

±30 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

0

°C to 70°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TLV1543I

−40

°C to 85°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TLV1543M

−55

°C to 125°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

−65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Lead temperature 1,6 mm (1/16 inch) from the case for 10 seconds

260

°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTE 1: All voltage values are with respect to digital ground with REF − and GND wired together (unless otherwise noted).