Rainbow-electronics MAX1420 Manual de usuario descargar pdf

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.

General Description

The MAX1420, +3.3V, 12-bit analog-to-digital converter

(ADC) features a fully-differential input, pipelined, 12-

stage ADC architecture with wideband track-and-hold

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

differential signal path. The MAX1420 is optimized for

low-power, high dynamic performance applications in

imaging and digital communications. The converter

operates from a single +3.3V supply, and consumes

only 221mW. The fully-differential input stage has a

small signal -3dB bandwidth of 400MHz and may be

operated with single-ended inputs.

An internal +2.048V precision bandgap reference sets

the full-scale range of the ADC. A flexible reference

structure accommodates an internal reference, or

externally applied buffered or unbuffered reference for

applications that require increased accuracy and a dif-

ferent input voltage range.

In addition to low operating power, the MAX1420 fea-

tures two power-down modes: reference power-down

and shutdown mode. In reference power-down, the

internal bandgap reference is deactivated, which

results in a typical 2mA supply current reduction. A full

shutdown mode is available to maximize power savings

during idle periods.

The MAX1420 provides parallel, offset binary, CMOS-

compatible three-state outputs.

The MAX1420 is available in a 7mm

7mm, 48-pin

TQFP package, and is specified over the commercial

(0°C to +70°C) and the extended industrial (-40° C to

+85°C) temperature range.

Pin-compatible lower speed versions of the MAX1420

are also available. Please refer to the MAX1421 data

sheet for 40Msps and the MAX1422 data sheet for

20Msps.

________________________Applications

Medical Ultrasound Imaging

CCD Pixel Processing

IR Focal Plane Arrays

Radar

IF & Baseband Digitization

Features

♦ +3.3V Single Power Supply

♦ 67dB SNR at f

= 5MHz

♦ 66dB SNR at f

= 15MHz

♦ Internal +2.048V Precision Bandgap Reference

♦ Differential, Wideband Input T/H Amplifier

♦ Power-Down Modes:

218mW (Reference Shutdown Mode)

10µW (Shutdown Mode)

♦ Space-Saving 48-Pin TQFP Package

MAX1420

12-Bit, 60Msps, +3.3V, Low-Power ADC

with Internal Reference

________________________________________________________________ Maxim Integrated Products 1

DGND

AGND

INP

INN

AGND

48-TQFP

MAX1420

AGND

CLK

AGND

DGND

AGND

CML

REFN

REFP

REFIN

AGND

D11

D10

Pin Configuration

19-1981; Rev 0; 5/01

Ordering Information

PART TEMP. RANGE PIN-PACKAGE

MAX1420CCM 0°C to +70°C 48 TQFP

MAX1420ECM -40°C to +85°C 48 TQFP

Functional diagram appears at end of data sheet.

1 2 3 4 5 6 ... 16 17

Indice de contenidos

Pagina 1 - Ordering Information

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.G

Pagina 2 - ELECTRICAL CHARACTERISTICS

MAX142012-Bit, 60Msps, +3.3V, Low-Power ADCwith Internal Reference10 _________________________________________________________________________________

Pagina 3

MAX142012-Bit, 60Msps, +3.3V, Low-Power ADCwith Internal Reference____________________________________________________________________________________

Pagina 4

12 ______________________________________________________________________________________MAX142012-Bit, 60Msps, +3.3V, Low-Power ADCFigure 4 shows a s

Pagina 5 - MAX1420 toc03

MAX142012-Bit, 60Msps, +3.3V, Low-Power ADCwith Internal Reference____________________________________________________________________________________

Pagina 6

MAX1420with high-speed op amps. Select the RISOand CINval-ues to optimize the filter performance, to suit a particu-lar application. For the applicati

Pagina 7

Static Parameter DefinitionsIntegral Nonlinearity (INL)Integral nonlinearity is the deviation of the values on anactual transfer function from a strai

Pagina 8 - MAX1420

MAX1420Total Harmonic Distortion (THD)THD is typically the ratio of the RMS sum of the first fourharmonics of the input signal to the fundamental itse

Pagina 9 - Pin Description

MAX142012-Bit, 60Msps, +3.3V, Low-Power ADCwith Internal ReferencePackage Information32L/48L,TQFP.EPSMaxim cannot assume responsibility for use of any

Pagina 10 - Input Track-and-Hold Circuit

MAX142012-Bit, 60Msps, +3.3V, Low-Power ADCwith Internal Reference2 __________________________________________________________________________________

Pagina 11 - ( )

MAX142012-Bit, 60Msps, +3.3V, Low-Power ADCwith Internal Reference____________________________________________________________________________________

Pagina 12 - Differential Inputs

MAX142012-Bit, 60Msps, +3.3V, Low-Power ADCwith Internal Reference4 __________________________________________________________________________________

Pagina 13

MAX142012-Bit, 60Msps, +3.3V, Low-Power ADCwith Internal Reference____________________________________________________________________________________

Pagina 14 - Using Transformer Coupling

MAX1420 12-Bit, 60Msps, +3.3V, Low-Power ADCwith Internal Reference6 _____________________________________________________________________________

Pagina 15 - Dynamic Parameter Definitions

MAX142012-Bit, 60Msps, +3.3V, Low-Power ADCwith Internal ReferenceTypical Operating Characteristics (continued)(VAVDD= VDVDD= +3.3V, AGND = DGND = 0,

Pagina 16 - Functional Diagram

MAX1420 12-Bit, 60Msps, +3.3V, Low-Power ADCwith Internal Reference8 _____________________________________________________________________________

Pagina 17 - 32L/48L,TQFP.EPS

MAX142012-Bit, 60Msps, +3.3V, Low-Power ADCwith Internal Reference____________________________________________________________________________________

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