AD9644-80KITZ datasheet(3/44 Pages) AD

Part #	AD9644-80KITZ

Description	14-Bit, 80 MSPS/155 MSPS, 1.8 V Dual Serial Output Analog-to-Digital Converter (ADC)

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Manufacturer	AD [Analog Devices]

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Data Sheet

AD9644

Rev. C | Page 3 of 44

GENERAL DESCRIPTION

The AD9644 is a dual, 14-bit, analog-to-digital converter (ADC)

with a high speed serial output interface and sampling speeds

of either 80 MSPS or 155 MSPS.

The AD9644 is designed to support communications appli-

cations where high performance, combined with low cost, small

size, and versatility, is desired. The JESD204A high speed serial

interface reduces board routing requirements and lowers pin count

requirements for the receiving device.

The dual ADC core features a multistage, differential pipelined

architecture with integrated output error correction logic. Each

ADC features wide bandwidth differential sample-and-hold

analog input amplifiers that support a variety of user-selectable

input ranges. An integrated voltage reference eases design consid-

erations. A duty cycle stabilizer is provided to compensate for

variations in the ADC clock duty cycle, allowing the converters

to maintain excellent performance.

By default, the ADC output data is routed directly to the two

external JESD204A serial output ports. These outputs are at CML

voltage levels. Two modes are supported such that output coded

data is either sent through one data link or two. (L = 1; F = 4 or

L = 2; F = 2). Independent synchronization inputs (DSYNC) are

provided for each channel.

Flexible power-down options allow significant power savings,

when desired.

Programming for setup and control is accomplished using a 3-wire

SPI-compatible serial interface.

The AD9644 is available in a 48-lead LFCSP and is specified over

the industrial temperature range of −40°C to +85°C.

This product is protected by a U.S. patent.

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