TL507C Datasheet, PDF (1/8 Pages) Texas Instruments – ANALOG-TO-DIGITAL CONVERTER

TL507C, TL507l
ANALOG-TO-DIGITAL CONVERTER
D Low Cost
D 7-Bit Resolution
D Montonicity Over Entire A/D Conversion
Range
D Ratiometric Conversion
D Conversion Speed . . . Approximately 1 ms
D Single-Supply Operation . . . Either
Unregulated 8-V to 18-V (V_CC2 Input) or
Regulated 3.5-V to 6-V (V_CC1 Input)
D I²L Technology
D Power Consumption at 5 V . . . 25 mW Typ
D Regulated 5.5-V Output (≤1 mA)
description
The TL507 is a low-cost single-slope analog-to-
digital converter designed to convert analog
inputvoltages between 0.25 V_CC1 and 0.75 V_CC1
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
logic circuitry. Integrated-injection logic (I²L)
technology makes it possible to offer this complex
circuit at low cost in a small dual-in-line 8-pin
package.
SLAS041 – OCTOBER 1979 – REVISED OCTOBER 1988
P PACKAGE
(TOP VIEW)
ENABLE 1
CLK 2
GND 3
OUTPUT 4
8 RESET
7 V_CC2
6 V_CC1
5 ANALOG INPUT
FUNCTION TABLE
ANALOG
INPUT CONDITION ^{ENABLE OUTPUT}
X
L†
H
VI < 200 mV
H
L
Vramp > VI > 200 mV
H
H
VI > Vramp
H
L
† _{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.
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.
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.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1988, Texas Instruments Incorporated
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