Rainbow-electronics MAX1444 Manual do Utilizador descarregar pdf (Página 1)

General Description

The MAX1444 10-bit, +3V analog-to-digital converter

(ADC) features a pipelined 10-stage ADC architecture

with fully differential wideband track-and-hold (T/H)

input and digital error correction incorporating a fully

differential signal path. This ADC is optimized for low-

power, high dynamic performance applications in

imaging and digital communications. The MAX1444

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

ing only 57mW 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 MAX1444 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.

Higher speed, pin-compatible versions of the MAX1444

are also available. Please refer to the MAX1446 data

sheet (60Msps) and the MAX1448 data sheet

(80Msps).

The MAX1444 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 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

74dBc SFDR at f

= 20MHz

♦ Low Power

19mA (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

♦ Evaluation Kit Available

MAX1444

10-Bit, 40Msps, +3.0V, Low-Power

ADC with Internal Reference

________________________________________________________________ Maxim Integrated Products 1

MAX1444

TQFP

TOP VIEW

32 28

293031

REFIN

GND

REFOUT

REFP

1611 12

GND

CLK

GND

OGND

24 D4

T.P.

8GND

IN-

IN+

GND

COM

1REFN

Pin Configuration

19-1745; 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

Functional Diagram appears at end of data sheet.

PART TEMP. RANGE PIN-PACKAGE

MAX1444EHJ -40°C to +85°C 32 TQFP

1 2 3 4 5 6 ... 17 18

ADC with Internal Reference 1

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Página 1 - ADC with Internal Reference

General DescriptionThe MAX1444 10-bit, +3V analog-to-digital converter(ADC) features a pipelined 10-stage ADC architecturewith fully differential wide

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MAX144410-Bit, 40Msps, +3.0V, Low-PowerADC with Internal Reference10 _________________________________________________________________________________

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