ADC10062CIWM datasheet(1/14 Pages) NSC

Il numero della parte	ADC10062CIWM

Spiegazioni elettronici	10-Bit 600 ns A/D Converter with Input Multiplexer and Sample/Hold

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ADC10061/ADC10062/ADC10064

10-Bit 600 ns A/D Converter with Input Multiplexer and

Sample/Hold

General Description

Using an innovative, patented multistep* conversion tech-

nique, the 10-bit ADC10061, ADC10062, and ADC10064

CMOS analog-to-digital converters offer sub-microsecond

conversion times yet dissipate a maximum of only 235 mW.

The ADC10061, ADC10062, and ADC10064 perform 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. The

ADC10061 is pin-compatible with the ADC1061 but much

faster, thus providing a convenient upgrade path for the

ADC1061.

The analog input voltage to the ADC10061, ADC10062, and

ADC10064 is sampled and held by an internal sampling cir-

cuit. Input signals at frequencies from dc to over 200 kHz

can therefore be digitized accurately without the need for an

external sample-and-hold circuit.

The ADC10062 and ADC10064 include a “speed-up” pin.

Connecting an external resistor between this pin and ground

reduces the typical conversion time to as little as 350 ns with

only a small increase in linearity error.

For ease of interface to microprocessors, the ADC10061,

ADC10062, and ADC10064 have been designed to appear

as a memory location or I/O port without the need for exter-

nal interface logic.

*U.S. Patent Number 4918449

Features

n Built-in sample-and-hold

n Single +5V supply

n 1, 2, or 4-input multiplexer options

n No external clock required

n Speed adjust pin for faster conversions (ADC10062

and ADC10064). See ADC10662/4 for high speed

guaranteed performance.

Key Specifications

n Conversion time to 10 bits

600 ns typical,

n

900 ns max over temperature

n Sampling Rate

800 kHz

n Low power dissipation

235 mW (max)

n Total unadjusted error

±1.0 LSB (max)

n No missing codes over temperature

Applications

n Digital signal processor front ends

n Instrumentation

n Disk drives

n Mobile telecommunications

Simplified Block Diagram

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

DS011020-1

*ADC10061 Only

**ADC10062 and ADC10064 Only

***ADC10064 Only

June 1999

DS011020

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