ADC12081

12-Bit, 5 MHz Self-Calibrating, Pipelined A/D Converter

with Internal Sample & Hold

General Description

The ADC12081 is a monolithic CMOS analog-to-digital con-

verter capable of converting analog input signals into 12-bit

digital words at 5 megasamples per second (MSPS). The

ADC12081 utilizes an innovative pipeline architecture to

minimize die size and power consumption. The ADC12081

uses self-calibration and error correction to maintain accu-

racy and performance over temperature.

The ADC12081 converter operates on a 5V power supply

and can digitize analog input signals in the range of 0 to 2V.

A single convert clock controls the conversion operation. All

digital I/O is TTL compatible.

The ADC12081 is designed to minimize external compo-

nents necessary for the analog input interface. An internal

sample-and-hold circuit samples the analog input and an in-

ternal amplifier buffers the reference voltage input.

The ADC12081 is available in the 32-lead TQFP package

and is designed to operate over the extended commercial

temperature range of -40˚C to +85˚C.

Features

n

Single 5V power supply

n

Simple analog input interface

n

Internal Sample-and-hold

n

Internal Reference buffer amplifier

n

Low power consumption

Key Specifications

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Resolution

12 Bits

n

Conversion Rate

5 Msps (min)

n

DNL

n

SNR

68 dB (typ)

n

ENOB

10.9 Bits (typ)

n

Analog Input Range

2 Vpp (min)

n

Supply Voltage

n

Power Consumption, 5 MHz

105 mW (typ)

Applications

n

Image processing front end

n

PC-based data acquisition

n

Scanners

n

Fax machines

n

Waveform digitizer

Connection Diagram

DS100150-1

March 2000

© 2000 National Semiconductor Corporation

DS100150

www.national.com