TLH11490

December 1994

ADC12062

12-Bit 1 MHz 75 mW AD Converter

with Input Multiplexer and SampleHold

General Description

Using an innovative multistep conversion technique the

12-bit ADC12062 CMOS analog-to-digital converter digitizes

signals at a 1 MHz sampling rate while consuming a maxi-

The

ADC12062 performs a 12-bit conversion in three lower-res-

olution ‘‘flash’’ conversions yielding a fast AD without the

cost and power dissipation associated with true flash ap-

proaches

The analog input voltage to the ADC12062 is tracked and

held by an internal sampling circuit allowing high frequency

input signals to be accurately digitized without the need for

an external sample-and-hold circuit The multiplexer output

is available to the user in order to perform additional exter-

nal signal processing before the signal is digitized

When the converter is not digitizing signals it can be placed

in the Standby mode typical power consumption in this

mode is 100 mW

Features

Y

Built-in sample-and-hold

Y

Y

Single channel or 2 channel multiplexer operation

Y

Low Power Standby mode

Key Specifications

Y

Sampling rate

1 MHz (min)

Y

Conversion time

740 ns (typ)

Y

695 dB (min)

Y

75 mW (max)

Y

No missing codes over temperature

Guaranteed

Applications

Y

Digital signal processor front ends

Y

Instrumentation

Y

Disk drives

Y

Mobile telecommunications

Y

Waveform digitizers

Block Diagram

TLH11490 – 1

Ordering Information

Industrial

Package

ADC12062BIV

V44 Plastic Leaded Chip Carrier

ADC12062BIVF

VGZ44A Plastic Quad Flat Package

ADC12062CIV

V44 Plastic Leaded Chip Carrier

ADC12062CIVF

VGZ44A Plastic Quad Flat Package

ADC12062EVAL

Evaluation Board

TRI-STATE

is a registered trademark of National Semiconductor Corporation

C1995 National Semiconductor Corporation

RRD-B30M75Printed in U S A