TL507C, TL507l

ANALOG-TO-DIGITAL CONVERTER

SLAS041 – OCTOBER 1979 – REVISED OCTOBER 1988

1

POST OFFICE BOX 655303

Range

description

The TL507 is a low-cost single-slope analog-to-

digital converter designed to convert analog

into a pulse-width-modulated output code. The

device contains a 7-bit synchronous counter, a

binary weighted resistor ladder network, an

operational amplifier, two comparators, a buffer

amplifier, an internal regulator, and necessary

technology makes it possible to offer this complex

circuit at low cost in a small dual-in-line 8-pin

package.

In continuous operation, conversion speeds of up to 1000 conversions per second are possible. The TL507

requires external signals for CLK, RESET, and ENABLE. Versatility and simplicity of operation, coupled with low

cost, makes this converter especially useful for a wide variety of applications.

The TL507C is characterized for operation from 0

°C to 70°C, and the TL507I is characterized for operation from

–40

°C to 85°C.

Copyright

© 1988, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

ANALOG

INPUT CONDITION

OUTPUT

ENABLE

X

VI < 200 mV

Vramp > VI > 200 mV

VI > Vramp

L†

H

H

H

H

L

H

L

FUNCTION TABLE

† Low level on enable also inhibits the reset function.

H = high level, L = low level, X = irrelevant

A high level on RESET clears the counter to zero,

which sets the internal ramp to 0.75 VCC. Internal

pulldown resistors keep RESET and ENABLE low

when not connected.

1

2

3

4

8

7

6

5

ENABLE

CLK

GND

OUTPUT

RESET

ANALOG INPUT

P PACKAGE

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