Rainbow-electronics MAX1448 Manual de usuario descargar pdf (Pagina 1)

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, consum-

ing 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. Please 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.

________________________Applications

Ultrasound Imaging

CCD Imaging

Baseband and IF Digitization

Digital Set-Top Boxes

Video Digitizing Applications

Features

♦ Single +3.0V Operation

♦ Excellent Dynamic Performance

59dB SNR at f

= 20MHz

74dBc SFDR at f

= 20MHz

♦ Low Power

40mA (Normal Operation)

5µA (Shutdown Mode)

♦ Fully Differential Analog Input

♦ Wide 2V

p-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

MAX1448

10-Bit, 80Msps, Single +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

MAX1448

Functional Diagram

19-5400; Rev 0; 9/00

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

Pin Configuration appears at end of data sheet.

PART TEMP. RANGE PIN-PACKAGE

MAX1448EHJ -40°C to +85°C 32 TQFP

1 2 3 4 5 6 ... 17 18

ADC with Internal Reference 1

Indice de contenidos

Pagina 1 - ADC with Internal Reference

General DescriptionThe MAX1448 +3V, 10-bit analog-to-digital converter(ADC) features a fully differential input, a pipelined 10-stage ADC architecture

Pagina 2

MAX144810-Bit, 80Msps, Single +3.0V, Low-PowerADC with Internal Reference10 __________________________________________________________________________

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MAX144810-Bit, 80Msps, Single +3.0V, Low-PowerADC with Internal Reference_____________________________________________________________________________

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MAX144810-Bit, 80Msps, Single +3.0V, Low-PowerADC with Internal Reference12 __________________________________________________________________________

Pagina 5

MAX144810-Bit, 80Msps, Single +3.0V, Low-PowerADC with Internal ReferenceUsing Transformer CouplingAn RF transformer (Figure 8) provides an excellents

Pagina 6

MAX144810-Bit, 80Msps, Single +3.0V, Low-PowerADC with Internal Reference14 __________________________________________________________________________

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MAX144810-Bit, 80Msps, Single +3.0V, Low-PowerADC with Internal Reference_____________________________________________________________________________

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MAX144810-Bit, 80Msps, Single +3.0V, Low-PowerADC with Internal Reference16 __________________________________________________________________________

Pagina 9

MAX144810-Bit, 80Msps, Single +3.0V, Low-PowerADC with Internal Reference_____________________________________________________________________________

Pagina 10

MAX144810-Bit, 80Msps, Single +3.0V, Low-PowerADC with Internal ReferenceMaxim cannot assume responsibility for use of any circuitry other than circui

Pagina 11

MAX144810-Bit, 80Msps, Single +3.0V, Low-PowerADC with Internal Reference2 ___________________________________________________________________________

Pagina 12

MAX144810-Bit, 80Msps, Single +3.0V, Low-PowerADC with Internal Reference_____________________________________________________________________________

Pagina 13

Note 1: SNR, SINAD, THD, SFDR and HD3 are based on an analog input voltage of -0.5dB FS referenced to a +1.024V full-scaleinput voltage range.Note 2:

Pagina 14

MAX144810-Bit, 80Msps, Single +3.0V, Low-PowerADC with Internal Reference_____________________________________________________________________________

Pagina 15

MAX144810-Bit, 80Msps, Single +3.0V, Low-PowerADC with Internal Reference6 ___________________________________________________________________________

Pagina 16

MAX144810-Bit, 80Msps, Single +3.0V, Low-PowerADC with Internal Reference_____________________________________________________________________________

Pagina 17

MAX144810-Bit, 80Msps, Single +3.0V, Low-PowerADC with Internal Reference8 ___________________________________________________________________________

Pagina 18

MAX144810-Bit, 80Msps, Single +3.0V, Low-PowerADC with Internal Reference_____________________________________________________________________________

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