TLC1549C, TLC1549I, TLC1549M

10-BIT ANALOG-TO-DIGITAL CONVERTERS

WITH SERIAL CONTROL

SLAS059C – DECEMBER 1992 – REVISED MARCH 1995

7

POST OFFICE BOX 655303

– 0.5 V to 6.5 V

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TLC1549M

– 0.5 V to 6 V

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

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

– 0.1 V

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Peak input current (any input)

±20 mA

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

Peak total input current (all inputs)

±30 mA

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0

°C to 70°C

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

TLC1549I

– 40

°C to 85°C

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TLC1549M

– 55

°C to 125°C

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

–65

°C to 150°C

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

260

°C

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† 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 ground with REF – and GND wired together (unless otherwise noted).

recommended operating conditions

MIN

NOM

MAX

UNIT

Supply voltage, VCC

4.5

5

5.5

V

Positive reference voltage, Vref + (see Note 2)

VCC

V

Negative reference voltage, Vref – (see Note 2)

0

V

Differential reference voltage, Vref + – Vref – (see Note 2)

2.5

VCC VCC + 0.2

V

Analog input voltage (see Note 2)

0

VCC

V

High-level control input voltage, VIH

VCC = 4.5 V to 5.5 V

2

V

Low-level control input voltage, VIL

VCC = 4.5 V to 5.5 V

0.8

V

Clock frequency at I/O CLOCK (see Note 3)

0

2.1

MHz

Setup time, CS low before first I/O CLOCK

↑, tsu(CS) (see Note 4)

1.425

µs

Hold time, CS low after last I/O CLOCK

↓, th(CS)

0

ns

Pulse duration, I/O CLOCK high, twH(I/O)

190

ns

Pulse duration, I/O CLOCK low, twL(I/O)

190

ns

Transition time, I/O CLOCK, tt(I/O) (see Note 5 and Figure 5)

1

µs

Transition time, CS, tt(CS)

10

µs

TLC1549C

0

70

Operating free-air temperature, TA

TLC1549I

–40

85

°C

TLC1549M

–55

125

NOTES:

2. Analog input voltages greater than that applied to REF + convert as all ones (1111111111), while input voltages less than that applied

to REF – convert as all zeros (0000000000). The TLC1549 is functional with reference voltages down to 1 V (Vref + – Vref –); however,

the electrical specifications are no longer applicable.

3. For 11- to 16-bit transfers, after the tenth I/O CLOCK falling edge (

≤ 2 V) at least 1 I/O CLOCK rising edge (≥ 2 V) must occur within

9.5

µs.

4. To minimize errors caused by noise at CS, the internal circuitry waits for a setup time plus two falling edges of the internal system

clock after CS

↓ before responding to the I/O CLOCK. No attempt should be made to clock out the data until the minimum CS setup

time has elapsed.

5. This is the time required for the clock input signal to fall from VIHmin to VILmax or to rise from VILmax to VIHmin. In the vicinity of

normal room temperature, the devices function with input clock transition time as slow as 1

µs for remote data-acquisition

applications where the sensor and the A / D converter are placed several feet away from the controlling microprocessor.