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ADC0803 Folha de dados(PDF) 1 Page - Texas Instruments

Nome de Peças ADC0803
Descrição Electrónicos  8-BIT ANALOG-TO-DIGITAL CONVERTERS WITH DIFFERENTIAL INPUTS
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ADC0803 Folha de dados(HTML) 1 Page - Texas Instruments

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ADC0803, ADC0805
8-BIT ANALOG-TO-DIGITAL CONVERTERS
WITH DIFFERENTIAL INPUTS
SLAS034 – NOVEMBER 1983 – REVISED SEPTEMBER 1986
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D 8-Bit Resolution
D Ratiometric Conversion
D 100-µs Conversion Time
D 135-ns Access Time
D Guaranteed Monotonicity
D High Reference Ladder Impedance
8 k
Ω Typical
D No Zero Adjust Requirement
D On-Chip Clock Generator
D Single 5-V Power Supply
D Operates With Microprocessor or as
Stand-Alone
D Designed to Be interchangeable With
National Semiconductor and Signetics
ADC0803 and ADC0805
description
The ADC0803 and ADC0805 are CMOS 8-bit, successive-approximation, analog-to-digital converters that use
a modified potentiometric (256R) ladder. These devices are designed to operate from common microprocessor
control buses with the 3-state output latches driving the data bus. The devices can be made to appear to the
microprocessor as a memory location or an I/O port. Detailed information on interfacing to most popular
microprocessors is readily available from the factory.
A differential analog voltage input allows increased common-mode rejection and offset of the zero-input analog
voltage value. Although a reference input (REF/2) is available to allow 8-bit conversion over smaller analog
voltage spans or to make use of an external reference, ratiometric conversion is possible with the REF/2 input
open. Without an external reference, the conversion takes place over a span from VCC to ANLG GND. The
devices can operate with an external clock signal or with an additional resistor and capacitor, using an on-chip
clock generator.
The ADC0803C and ADC0805C are characterized for operation from 0
°C to 70°C. The ADC0803I and
ADC0805I are characterized for operation from – 40
°C to 85°C.
Copyright
© 1986, 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.
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20
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11
CS
RD
WR
CLK IN
INTR
IN +
IN –
ANLG GND
REF/2
DGTL GND
VCC (OR REF)
CLK OUT
DB0 (LSB)
DB1
DB2
DB3
DB4
DB5
DB6
DB7 (MSB)
N PACKAGE
(TOP VIEW)
DATA
OUTPUTS


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