Rainbow-electronics MAX19505 Manual de usuario descargar pdf

General Description

The MAX19505 dual-channel, analog-to-digital convert-

er (ADC) provides 8-bit resolution and a maximum sam-

ple rate of 65Msps.

The MAX19505 analog input accepts a wide 0.4V to

1.4V input common-mode voltage range, allowing DC-

coupled inputs for a wide range of RF, IF, and base-

band front-end components. The MAX19505 provides

excellent dynamic performance from baseband to high

input frequencies beyond 400MHz, making the device

ideal for zero-intermediate frequency (ZIF) and high-

intermediate frequency (IF) sampling applications. The

typical signal-to-noise ratio (SNR) performance is

49.8dBFS and typical spurious-free dynamic range

(SFDR) is 69dBc at f

= 70MHz and f

CLK

= 65MHz.

The MAX19505 operates from a 1.8V supply.

Additionally, an integrated, self-sensing voltage regula-

tor allows operation from a 2.5V to 3.3V supply (AVDD).

The digital output drivers operate on an independent

supply voltage (OVDD) over the 1.8V to 3.5V range.

The analog power consumption is only 43mW per chan-

nel at V

AVDD

= 1.8V. In addition to low operating

power, the MAX19505 consumes only 1mW in power-

down mode and 15mW in standby mode.

Various adjustments and feature selections are avail-

able through programmable registers that are

accessed through the 3-wire serial-port interface.

Alternatively, the serial-port interface can be disabled,

with the three pins available to select output mode,

data format, and clock-divider mode. Data outputs are

available through a dual parallel CMOS-compatible out-

put data bus that can also be configured as a single

multiplexed parallel CMOS bus.

The MAX19505 is available in a small 7mm x 7mm

48-pin thin QFN package and is specified over the

-40°C to +85°C extended temperature range.

Refer to the MAX19515, MAX19516, and MAX19517

data sheets for pin- and feature-compatible 10-bit,

65Msps, 100Msps, and 130Msps versions, respectively.

Refer to the MAX19506 and MAX19507 data sheets for

pin- and feature-compatible 8-bit, 100Msps and

130Msps versions, respectively.

Applications

IF and Baseband Communications, Including

Cellular Base Stations and Point-to-Point

Microwave Receivers

Ultrasound and Medical Imaging

Portable Instrumentation and Low-Power Data

Acquisition

Digital Set-Top Boxes

Features

o Very-Low-Power Operation (43mW/Channel at

65Msps)

o 1.8V or 2.5V to 3.3V Analog Supply

o Excellent Dynamic Performance

49.8dBFS SNR at 70MHz

69dBc SFDR at 70MHz

o User-Programmable Adjustments and Feature

Selection through an SPI™ Interface

o Selectable Data Bus (Dual CMOS or Single

Multiplexed CMOS)

o DCLK Output and Programmable Data Output

Timing Simplifies High-Speed Digital Interface

o Very Wide Input Common-Mode Voltage Range

(0.4V to 1.4V)

o Very High Analog Input Bandwidth (> 850MHz)

o Single-Ended or Differential Analog Inputs

o Single-Ended or Differential Clock Input

o Divide-by-One (DIV1), Divide-by-Two (DIV2), and

Divide-by-Four (DIV4) Clock Modes

o Two’s Complement, Gray Code, and Offset Binary

Output Data Format

o Out-of-Range Indicator (DOR)

o CMOS Output Internal Termination Options

(Programmable)

o Reversible Bit Order (Programmable)

o Data Output Test Patterns

o Small, 7mm x 7mm 48-Pin Thin QFN Package with

Exposed Pad

MAX19505

Dual-Channel, 8-Bit, 65Msps ADC

________________________________________________________________

Maxim Integrated Products

Ordering Information

19-4314; Rev 0; 10/08

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

EVALUATION KIT

AVAILABLE

PART TEMP RANGE PIN-PACKAGE

MAX19505ETM+

-40°C to +85°C 48 TQFN-EP*

Denotes a lead-free/RoHS-compliant package.

EP = Exposed pad.

Pin Configuration appears at end of data sheet.

SPI is a trademark of Motorola, Inc.

1 2 3 4 5 6 ... 33 34

MAX19505 1

Indice de contenidos

Pagina 1 - MAX19505

General DescriptionThe MAX19505 dual-channel, analog-to-digital convert-er (ADC) provides 8-bit resolution and a maximum sam-ple rate of 65Msps.The MA

Pagina 2

10 ______________________________________________________________________________________Typical Operating Characteristics (continued)(VAVDD= VOVDD= 1

Pagina 3

Typical Operating Characteristics (continued)(VAVDD= VOVDD= 1.8V, internal reference, differential clock, VCLK= 1.5VP-P, fCLK= 65MHz, AIN= -0.5dBFS, d

Pagina 4

MAX19505Dual-Channel, 8-Bit, 65Msps ADC12 ______________________________________________________________________________________Pin DescriptionPIN NAM

Pagina 5

MAX19505Dual-Channel, 8-Bit, 65Msps ADC______________________________________________________________________________________ 13Detailed DescriptionTh

Pagina 6

MAX19505Dual-Channel, 8-Bit, 65Msps ADC14 ______________________________________________________________________________________T/HINA+CMAREFIOCMBINA-

Pagina 7

MAX19505Dual-Channel, 8-Bit, 65Msps ADC______________________________________________________________________________________ 15Reference Input/Output

Pagina 8

MAX19505Dual-Channel, 8-Bit, 65Msps ADC16 ______________________________________________________________________________________Serial Programming Int

Pagina 9

MAX19505Dual-Channel, 8-Bit, 65Msps ADC______________________________________________________________________________________ 17BIT NO. VALUE DESCRIPT

Pagina 10

MAX19505Dual-Channel, 8-Bit, 65Msps ADC18 ______________________________________________________________________________________HPS_SHDN0 STBY_SHDN0 C

Pagina 11

MAX19505Dual-Channel, 8-Bit, 65Msps ADC______________________________________________________________________________________ 19Digital Output Power M

Pagina 12

MAX19505Dual-Channel, 8-Bit, 65Msps ADC2 _______________________________________________________________________________________ABSOLUTE MAXIMUM RATIN

Pagina 13

MAX19505Dual-Channel, 8-Bit, 65Msps ADC20 ______________________________________________________________________________________Data/DCLK Timing (03h)

Pagina 14

MAX19505Dual-Channel, 8-Bit, 65Msps ADC______________________________________________________________________________________ 21CHA Data Output Termin

Pagina 15

MAX19505Dual-Channel, 8-Bit, 65Msps ADC22 ______________________________________________________________________________________Clock Divide/Data Form

Pagina 16

MAX19505Dual-Channel, 8-Bit, 65Msps ADC______________________________________________________________________________________ 23Common Mode (08h)Softw

Pagina 17

Clock InputsThe input clock interface provides for flexibility in therequirements of the clock driver. The MAX19505accepts a fully differential clock

Pagina 18

MAX19505Dual-Channel, 8-Bit, 65Msps ADC______________________________________________________________________________________ 25Format/Test Pattern re

Pagina 19

MAX19505Dual-Channel, 8-Bit, 65Msps ADC26 ______________________________________________________________________________________SYNCSYNC2x INPUT CLK4x

Pagina 20

MAX19505Dual-Channel, 8-Bit, 65Msps ADC______________________________________________________________________________________ 27SYNCSYNC2x INPUT CLK4x

Pagina 21

MAX19505Dual-Channel, 8-Bit, 65Msps ADC28 ______________________________________________________________________________________Digital OutputsThe MAX

Pagina 22

MAX19505Dual-Channel, 8-Bit, 65Msps ADC______________________________________________________________________________________ 29Figure 15. Recommended

Pagina 23

MAX19505Dual-Channel, 8-Bit, 65Msps ADC_______________________________________________________________________________________ 3PARAMETER SYMBOL CONDI

Pagina 24

MAX19505Dual-Channel, 8-Bit, 65Msps ADC30 ______________________________________________________________________________________Integrated Voltage Reg

Pagina 25

MAX19505Dual-Channel, 8-Bit, 65Msps ADC______________________________________________________________________________________ 31Applications Informati

Pagina 26

MAX19505Dual-Channel, 8-Bit, 65Msps ADC32 ______________________________________________________________________________________The circuit of Figure

Pagina 27

MAX19505Dual-Channel, 8-Bit, 65Msps ADC______________________________________________________________________________________ 33Small-Signal Noise Flo

Pagina 28

MAX19505Dual-Channel, 8-Bit, 65Msps ADCMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim p

Pagina 29

MAX19505Dual-Channel, 8-Bit, 65Msps ADC4 _______________________________________________________________________________________ELECTRICAL CHARACTERIS

Pagina 30

MAX19505Dual-Channel, 8-Bit, 65Msps ADC_______________________________________________________________________________________ 5ELECTRICAL CHARACTERIS

Pagina 31

MAX19505Dual-Channel, 8-Bit, 65Msps ADC6 _______________________________________________________________________________________ELECTRICAL CHARACTERIS

Pagina 32

MAX19505Dual-Channel, 8-Bit, 65Msps ADC_______________________________________________________________________________________ 7ELECTRICAL CHARACTERIS

Pagina 33

175MHz TWO-TONE IMD PLOTFREQUENCY (MHz)MAX19505 toc060 5 10 15 25 3020AMPLITUDE (dBFS)-100-90-80-70-60-40-50-20-30-100fIN1 = 172.50202MHzfIN2 = 177.49

Pagina 34

ANALOG SUPPLY CURRENTvs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)ANALOG SUPPLY CURRENT (mA)MAX19505 toc181.65 1.70 1.75 1.80 1.85 1.90 1.954041424344454647484

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