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MAX1448

10-Bit, 80Msps, Single 3.0V, Low-Power ADC with Internal Reference

Maxim Integrated 

19-5400; Rev 3; 9/04

EVAALVUAAILTAIOBNLEKIT

10-Bit, 80Msps, Single 3.0V, Low-Power

ADC with Internal Reference

General Description

The MAX1448 3V, 10-bit analog-to-digital converter

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

stage ADC architecture with wideband track-and-hold

(T/H), and digital error correction incorporating a fully

differential signal path. The ADC is optimized for low-

power, high dynamic performance in imaging and digi-

tal communications applications. The converter

operates from a single 2.7V to 3.6V supply, consuming

only 120mW while delivering a 59dB (typ) signal-to-

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

differential input stage has a -3dB 400MHz bandwidth

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

tion to low operating power, the MAX1448 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 speed, pin-compatible versions of the MAX1448

are also available. Refer to the MAX1444 data sheet for

a 40Msps version and to the MAX1446 data sheet for a

60Msps version.

The MAX1448 has parallel, offset binary, CMOS-com-

patible three-state outputs that can be operated from

1.7V to 3.6V to allow flexible interfacing. The device is

available in a 5mm x 5mm 32-pin TQFP package and is

specified over the extended industrial (-40°C to +85°C)

temperature range.

Features

♦ Single 3.0V Operation

♦ Excellent Dynamic Performance

59dB SNR at fIN = 20MHz

74dBc SFDR at fIN = 20MHz

♦ Low Power

40mA (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

♦ Evaluation Kit Available (MAX1448 EV Kit)

PART

MAX1448EHJ

Ordering Information

TEMP RANGE

-40°C to +85°C

PIN-PACKAGE

32 TQFP

Functional Diagram

________________________Applications

Ultrasound Imaging

CCD Imaging

Baseband and IF Digitization

Digital Set-Top Boxes

Video Digitizing Applications

CLK

IN+

T/H

IN-

PD

REF

CONTROL

PIPELINEADC

REFSYSTEM+

BIAS

MAX1448

VDD

GND

D

E

C

10

OUTPUT

DRIVERS

D9–D0

OVDD

OGND

REFOUT REFIN REFP COM REFN

OE

Pin Configuration appears at end of data sheet.

________________________________________________________________ Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

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