Rainbow-electronics MAX1446 User Manual download pdf

General Description

The MAX1446 10-bit, +3V analog-to-digital converter

(ADC) features a fully differential input, a pipelined 10-

stage ADC architecture with digital error correction and

wideband track and hold (T/H) incorporating a fully dif-

ferential signal path. This ADC is optimized for low-

power, high dynamic performance applications in

imaging and digital communications. The MAX1446

operates from a single +2.7V to +3.6V supply, consum-

ing only 90mW while delivering a 59.5dB signal-to-

noise ratio (SNR) at a 20MHz input frequency. The fully

differential input stage has a 400MHz, -3dB bandwidth

and may be operated with single-ended inputs. In addi-

tion to low operating power, the MAX1446 features a

5µA power-down mode for idle periods.

An internal +2.048V precision bandgap reference is

used to set the ADC full-scale range. A flexible refer-

ence structure allows the user to supply a buffered,

direct or externally derived reference for applications

requiring increased accuracy or a different input volt-

age range.

Lower and higher speed, pin-compatible versions of

the MAX1446 are also available. Refer to the MAX1444

data sheet for a 40Msps version and the MAX1448 data

sheet for a 80Msps version.

The MAX1446 has parallel, offset binary, three-state

outputs that can be operated from +1.7V to +3.3V to

allow flexible interfacing. The device is available in a

5x5mm, 32-pin TQFP package and is specified over the

extended industrial (-40°C to +85°C) temperature

range.

________________________Applications

Ultrasound Imaging

CCD Imaging

Baseband and IF Digitization

Digital Set-Top Boxes

Video Digitizing Applications

Features

♦ Single +3.0V Operation

♦ Excellent Dynamic Performance

59.5dB SNR at f

= 20MHz

73dB SFDR at f

= 20MHz

♦ Low Power:

30mA (Normal Operation)

5µA (Shutdown Mode)

♦ Fully Differential Analog Input

♦ Wide 2Vp-p Differential Input Voltage Range

♦ 400MHz -3dB Input Bandwidth

♦ On-Chip +2.048V Precision Bandgap Reference

♦ CMOS-Compatible Three-State Outputs

♦ 32-Pin TQFP Package

MAX1446

10-Bit, 60Msps, +3.0V, Low-Power

ADC with Internal Reference

________________________________________________________________ Maxim Integrated Products 1

CLK

IN+

CONTROL

PIPELINE ADC

REF SYSTEM +

BIAS

OUTPUT

DRIVERS

REF

REFINREFOUT REFP COM REFN OE

GND

OGND

D9–D0

IN-

T/H

MAX1446

Functional Diagram

19-1729; Rev 0; 7/00

For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

EVALUATION KIT

AVAILABLE

Ordering Information

PART TEMP. RANGE PIN-PACKAGE

MAX1446EHJ -40°C to +85°C 32 TQFP

1 2 3 4 5 6 ... 15 16

ADC with Internal Reference 1

Summary of Contents

Page 1 - ADC with Internal Reference

General DescriptionThe MAX1446 10-bit, +3V analog-to-digital converter(ADC) features a fully differential input, a pipelined 10-stage ADC architecture

Page 2

MAX144610-Bit, 60Msps, +3.0V, Low-Power ADC with Internal Reference10 ________________________________________________________________________________

Page 3