厂商Texas Instruments 半导体半导体 ADC0808 数据手册，datasheet pdf下载

型号：	ADC0808
厂商：	Texas Instruments
分类：	半导体
描述：	8-bit uP compatible A/D converters with 8-channel multiplexer
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ADC0808的详细信息

Feature：	CMOS ADC with 8-Ch. Multiplexers

October 1999

ADC0808/ADC0809

8-Bit µP Compatible A/D Converters with 8-Channel

Multiplexer

General Description

Features

n Easy interface to all microprocessors

n Operates ratiometrically or with 5 V_DCor analog span

adjusted voltage reference

The ADC0808, ADC0809 data acquisition component is a

monolithic CMOS device with an 8-bit analog-to-digital con-

verter, 8-channel multiplexer and microprocessor compatible

control logic. The 8-bit A/D converter uses successive ap-

proximation as the conversion technique. The converter fea-

tures a high impedance chopper stabilized comparator, a

256R voltage divider with analog switch tree and a succes-

sive approximation register. The 8-channel multiplexer can

directly access any of 8-single-ended analog signals.

n No zero or full-scale adjust required

n 8-channel multiplexer with address logic

n 0V to 5V input range with single 5V power supply

n Outputs meet TTL voltage level specifications

n Standard hermetic or molded 28-pin DIP package

n 28-pin molded chip carrier package

The device eliminates the need for external zero and

full-scale adjustments. Easy interfacing to microprocessors

is provided by the latched and decoded multiplexer address

inputs and latched TTL TRI-STATE^®outputs.

n ADC0808 equivalent to MM74C949

n ADC0809 equivalent to MM74C949-1

Key Specifications

The design of the ADC0808, ADC0809 has been optimized

by incorporating the most desirable aspects of several A/D

conversion techniques. The ADC0808, ADC0809 offers high

speed, high accuracy, minimal temperature dependence, ex-

cellent long-term accuracy and repeatability, and consumes

minimal power. These features make this device ideally

suited to applications from process and machine control to

consumer and automotive applications. For 16-channel mul-

tiplexer with common output (sample/hold port) see

ADC0816 data sheet. (See AN-247 for more information.)

n Resolution

8 Bits

LSB and 1 LSB

n Total Unadjusted Error

n Single Supply

n Low Power

⁄2

5 V_DC

15 mW

100 µs

n Conversion Time

Block Diagram

DS005672-1

See Ordering

Information

TRI-STATE^®is a registered trademark of National Semiconductor Corp.

DS005672

www.national.com