AD9857SLASHPCB datasheet(1/40 Pages) AD

Part #	AD9857/PCB

Description	CMOS 200 MSPS 14-Bit Quadrature Digital Upconverter

PDF	40 Pages

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Manufacturer	AD [Analog Devices]

Direct Link	http://www.analog.com

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CMOS 200 MSPS 14-Bit

Quadrature Digital Upconverter

AD9857

Rev. C

Information furnished by Analog Devices is believed to be accurate and reliable.

However, no responsibility is assumed by Analog Devices for its use, nor for any

infringements of patents or other rights of third parties that may result from its use.

Specifications subject to change without notice. No license is granted by implication

or otherwise under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

www.analog.com

Fax: 781.326.8703

FEATURES

200 MHz internal clock rate

14-bit data path

Excellent dynamic performance:

80 dB SFDR @ 65 MHz (±100 kHz) AOUT

4× to 20× programmable reference clock multiplier

Reference clock multiplier PLL lock detect indicator

Internal 32-bit quadrature DDS

FSK capability

8-bit output amplitude control

Single-pin power-down function

Four programmable, pin-selectable signal profiles

SIN(x)/x correction (inverse SINC function)

Simplified control interface

10 MHz serial, 2-wire or 3-wire SPI®-compatible

3.3 V single supply

Single-ended or differential input reference clock

80-lead LQFP surface-mount packaging

Three modes of operation:

Quadrature modulator mode

Single-tone mode

Interpolating DAC mode

APPLICATIONS

HFC data, telephony, and video modems

Wireless base station

Agile, LO frequency synthesis

Broadband communications

FUNCTIONAL BLOCK DIAGRAM

14

14-BIT

DAC

DAC_RSET

IOUT

8

OUTPUT

SCALE

VALUE

REFCLK

MODE

CONTROL

PLL

LOCK

CLOCK

INPUT

MODE

AD9857

PARALLEL

DATA IN

(14-BIT)

PDCLK/

FUD

14

INVERSE

CIC FILTER

INV

CIC

Q

(4 )

CIC

(2 - 63 )

FIXED

INTER-

POLATOR

PROGRAMMABLE

INTERPOLATOR

QUADRATURE

MODULATOR

INVERSE

SINC

FILTER

32

TUNING

WORD

TIMING AND CONTROL

DDS

CORE

CLOCK

MULTIPLIER

(4 – 20 )

PROFILE

SELECT

LOGIC

CONTROL REGISTERS

RESET

CIC

OVERFLOW

SERIAL

PORT

I

14

PS0

PS1

POWER-

DOWN

LOGIC

DIGITAL

POWER-

DOWN

TxENABLE

Figure 1.

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