ADC10664 datasheet(1/14 Pages) NSC

Part #	ADC10664

Description	10-Bit 360 ns A/D Converter with Input Multiplexer and Sample/Hold

PDF	14 Pages

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Manufacturer	NSC [National Semiconductor (TI)]

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ADC10662/ADC10664

10-Bit 360 ns A/D Converter with Input Multiplexer and

Sample/Hold

General Description

Using an innovative, patented multistep* conversion tech-

nique, the 10-bit ADC10662 and ADC10664 are 2- and

4-input

CMOS

analog-to-digital

converters

offering

sub-microsecond conversion times yet dissipating a maxi-

mum of only 235 mW. The ADC10662 and ADC10664 per-

form a 10-bit conversion in two lower-resolution “flashes”,

thus yielding a fast A/D without the cost, power dissipation,

and other problems associated with true flash approaches.

In addition to standard static performance specifications

(Linearity, Full-Scale Error, etc.) dynamic performance (THD,

S/N) is guaranteed.

The analog input voltage to the ADC10662 and ADC10664 is

sampled and held by an internal sampling circuit. Input sig-

nals at frequencies from dc to over 250 kHz can therefore be

digitized accurately without the need for an external

sample-and-hold circuit.

The ADC10662 and ADC10664 include a “speed-up” pin.

Connecting an external resistor between this pin and ground

reduces the typical conversion time to as little as 360 ns.

For ease of interface to microprocessors, the ADC10662 and

ADC10664 have been designed to appear as a memory lo-

cation or I/O port without the need for external interface

logic.

Features

n Built-in sample-and-hold

n Single +5V supply

n 2- or 4-input multiplexer options

n No external clock required

Key Specifications

n Conversion time to 10 bits:

360 ns typical, 466 ns

max over temperature

n Sampling Rate:

1.5 MHz (min)

n Low power dissipation:

235 mW (max)

n Total harmonic distortion (50 kHz):

−60 dB (max)

n No missing codes over temperature

Applications

n Digital signal processor front ends

n Instrumentation

n Disk drives

n Mobile telecommunications

Ordering Information

ADC10662

Industrial

(−40˚C

≤ T

A ≤ +85˚C)

Package

ADC10662CIWM

M24B Small Outline

ADC10664

Industrial

(−40˚C

≤ T

A ≤ +85˚C)

Package

ADC10664CIWM

M28B Small Outline

*U.S. Patent Number 4918449

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

June 1999

DS011192

www.national.com

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ADC10664 Datasheet(PDF) 1 Page - National Semiconductor (TI)

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