ADC0808-N, ADC0809-N

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SNAS535H – OCTOBER 1999 – REVISED MARCH 2013

ADC0808/ADC0809 8-Bit

μP Compatible A/D Converters with 8-Channel Multiplexer

Check for Samples: ADC0808-N, ADC0809-N

1

FEATURES

DESCRIPTION

The ADC0808, ADC0809 data acquisition component

2

•

Easy Interface to All Microprocessors

is a monolithic CMOS device with an 8-bit analog-to-

•

Operates Ratiometrically or with 5 VDC or

digital

converter,

8-channel

multiplexer

and

Analog Span Adjusted Voltage Reference

microprocessor compatible control logic. The 8-bit

•

No Zero or Full-Scale Adjust Required

A/D converter uses successive approximation as the

conversion technique. The converter features a high

•

8-Channel Multiplexer with Address Logic

impedance chopper stabilized comparator, a 256R

•

0V to VCC Input Range

voltage divider with analog switch tree and a

•

Outputs meet TTL Voltage Level Specifications

successive approximation register. The 8-channel

multiplexer can directly access any of 8-single-ended

•

ADC0808 Equivalent to MM74C949

analog signals.

•

ADC0809 Equivalent to MM74C949-1

The device eliminates the need for external zero and

full-scale

adjustments.

Easy

interfacing

to

KEY SPECIFICATIONS

microprocessors is provided by the latched and

•

Resolution: 8 Bits

decoded multiplexer address inputs and latched TTL

•

Total Unadjusted Error: ±½ LSB and ±1 LSB

TRI-STATE outputs.

•

Single Supply: 5 VDC

The design of the ADC0808, ADC0809 has been

•

Low Power: 15 mW

optimized by incorporating the most desirable aspects

of several A/D conversion techniques. The ADC0808,

•

Conversion Time: 100

μs

ADC0809 offers high speed, high accuracy, minimal

temperature

dependence,

excellent

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 multiplexer with common output (sample/hold

port)

see

ADC0816

data

sheet.

(See

AN-247

(Literature Number SNOA595) for more information.)

Block Diagram

Connection Diagrams

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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

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PRODUCTION DATA information is current as of publication date.

Copyright © 1999–2013, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.