Datasheet > AD9957_07

AD9957_07

更新时间： 2024-11-11 04:04:27

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
60页	1183K
描述
1 GSPS Quadrature Digital Upconverter with 18-Bit IQ Data Path and 14-Bit DAC

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AD9957_07 数据手册

1 GSPS Quadrature Digital Upconverter

with 18-Bit IQ Data Path and 14-Bit DAC

AD9957

FEATURES

GENERAL DESCRIPTION

1 GSPS internal clock speed (up to 400 MHz analog output)

Integrated 1 GSPS 14-bit DAC

The AD9957 functions as a universal I/Q modulator and agile

upconverter for communications systems where cost, size, power

consumption, and dynamic performance are critical. The AD9957

integrates a high speed, direct digital synthesizer (DDS), a high

performance, high speed, 14-bit digital-to-analog converter (DAC),

clock multiplier circuitry, digital filters, and other DSP functions

onto a single chip. It provides for baseband upconversion for data

transmission in a wired or wireless communications system.

250 MHz I/Q data throughput rate

Phase noise ≤ −125 dBc/Hz (400 MHz carrier @ 1 kHz offset)

Excellent dynamic performance >80 dB narrow-band SFDR

8 programmable profiles for shift keying

SIN(x)/(x) correction (inverse sinc filter)

Reference clock multiplier

Internal oscillator for a single crystal operation

Software and hardware controlled power-down

Integrated RAM

Phase modulation capability

Multichip synchronization

Easy interface to Blackfin SPORT

Interpolation factors from 4× to 252×

Interpolation DAC mode

The AD9957 is the third offering in a family of quadrature

digital upconverters (QDUCs) that includes the AD9857 and

AD9856. It offers performance gains in operating speed, power

consumption, and spectral performance. Unlike its predecessors,

it supports a 16-bit serial input mode for I/Q baseband data.

The device can alternatively be programmed to operate either as

a single tone, sinusoidal source or as an interpolating DAC.

Gain control DAC

The reference clock input circuitry includes a crystal oscillator,

a high speed, divide-by-two input, and a low noise PLL for

multiplication of the reference clock frequency.

Internal divider allows references up to 2 GHz

1.8 V and 3.3 V power supplies

100-lead TQFP_EP package

The user interface to the control functions includes a serial port

easily configured to interface to the SPORT of the Blackfin®

DSP and profile pins to enable fast and easy shift keying of any

signal parameter (phase, frequency, and amplitude).

APPLICATIONS

HFC data, telephony, and video modems

Wireless base station transmission

Broadband communications transmissions

Internet telephony

FUNCTIONAL BLOCK DIAGRAM

DATA

FOR

XMIT

FORMAT AND

INTERPOLATE

14-BIT DAC

I/Q DATA

NCO

AD9957

TIMING

AND

CONTROL

REFERENCE CLOCK

INPUT CIRCUITRY

USER INTERFACE

REFERENCE CLOCK INPUT

Figure 1.

Rev. 0

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 registeredtrademarks arethe property of their respective owners.

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

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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与AD9957_07相关器件

型号	品牌	获取价格	描述	数据表
AD9957BSVZ	ADI	获取价格	1 GSPS Quadrature Digital Upconverter w/18-Bit IQ Data Path and 14-Bit DAC
AD9957BSVZ-REEL	ADI	获取价格	1 GSPS Quadrature Digital Upconverter with 18-Bit IQ Data Path and 14-Bit DAC
AD9957BSVZREEL13	ADI	获取价格	1 GSPS Quadrature Digital Upconverter w/18-Bit IQ Data Path and 14-Bit DAC
AD9957BSVZ-REEL13	ADI	获取价格	IC SPECIALTY TELECOM CIRCUIT, QFP48, PLASTIC, MS-026-AED-HD, TQFP-48, Telecom IC:Other
AD9958	ADI	获取价格	2-Channel 500 MSPS DDS with 10-Bit DACs
AD9958/PCB	ADI	获取价格	2-Channel 500 MSPS DDS with 10-Bit DACs
AD9958/PCBZ	ADI	获取价格	2-Channel, 500 MSPS DDS with 10-Bit DACs
AD9958_08	ADI	获取价格	2-Channel, 500 MSPS DDS with 10-Bit DACs
AD9958BCPZ	ADI	获取价格	2-Channel 500 MSPS DDS with 10-Bit DACs
AD9958BCPZ-REEL7	ADI	获取价格	2-Channel 500 MSPS DDS with 10-Bit DACs

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