AD9785

更新时间： 2024-09-13 04:31:11

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
64页	1250K
描述
Dual 12-/14-/16-Bit 800 MSPS DAC with Low Power 32-Bit Complex NCO

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AD9785 数据手册

Dual 12-/14-/16-Bit 800 MSPS DAC

with Low Power 32-Bit Complex NCO

AD9785/AD9787/AD9788

GENERAL DESCRIPTION

FEATURES

Analog output: adjustable 8.7 mA to 31.7 mA,

R_L= 25 Ω to 50 Ω

Low power, fine complex NCO allows carrier placement

The AD9785/AD9787/AD9788 are 12-bit, 14-bit, and 16-bit,

high dynamic range TxDAC® devices, respectively, that provide

a sample rate of 800 MSPS, permitting multicarrier generation

anywhere in DAC bandwidth while adding <300 mW power

Auxiliary DACs allow I and Q gain matching and offset control

Includes programmable I and Q phase compensation

Internal digital upconversion capability

Multiple chip synchronization interface

High performance, low noise PLL clock multiplier

Digital inverse sinc filter

up to the Nyquist frequency. Features are included for optimizing

direct conversion transmit applications, including complex

digital modulation, as well as gain, phase, and offset compens-

ation. The DAC outputs are optimized to interface seamlessly

with analog quadrature modulators, such as the ADL537x

family from Analog Devices, Inc. A serial peripheral interface

(SPI) provides for programming and readback of many internal

parameters. Full-scale output current can be programmed over

a range of 10 mA to 30 mA. The AD978x family is manufactured

on a 0.18 μm CMOS process and operates from 1.8 V and 3.3 V

supplies. It is enclosed in a 100-lead TQFP package.

100-lead, exposed paddle TQFP package

APPLICATIONS

Wireless infrastructure

WCDMA, CDMA2000, TD-SCDMA, WiMAX, GSM

Digital high or low IF synthesis

Transmit diversity

Wideband communications

LMDS/MMDS, point-to-point

PRODUCT HIGHLIGHTS

1. Low noise and intermodulation distortion (IMD) enable

high quality synthesis of wideband signals from baseband

to high intermediate frequencies.

2. Proprietary DAC output switching technique enhances

dynamic performance.

3. CMOS data input interface with adjustable setup and hold.

4. Low power complex 32-bit numerically controlled

oscillators (NCOs).

TYPICAL SIGNAL CHAIN

QUADRATURE

MODULATOR/

MIXER/

COMPLEX I AND Q

AMPLIFIER

DIGITAL INTERPOLATION FILTERS

I DAC

POST DAC

ANALOG FILTER

FPGA/ASIC/DSP

Q DAC

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

12 3 4 5 6 7...64

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与AD9785相关器件

型号	品牌	获取价格	描述	数据表
AD9785BSVZ	ADI	获取价格	Dual 12-/14-/16-Bit 800 MSPS DAC with Low Power 32-Bit Complex NCO
AD9785BSVZRL	ADI	获取价格	Dual 12-/14-/16-Bit 800 MSPS DAC with Low Power 32-Bit Complex NCO
AD9785-EBZ	ADI	获取价格	Dual 12-/14-/16-Bit 800 MSPS DAC with Low Power 32-Bit Complex NCO
AD9786	ADI	获取价格	16-Bit, 200 MSPS/500 MSPS TxDAC+ with 2】/4】/8
AD9786BSV	ADI	获取价格	16-Bit, 200 MSPS/500 MSPS TxDAC+ with 2】/4】/8
AD9786BSVRL	ADI	获取价格	16-Bit, 200 MSPS/500 MSPS TxDAC+ with 2】/4】/8
AD9786BSVZ	ADI	获取价格	16-Bit, 200 MSPS/500 MSPS TxDAC
AD9786BSVZRL	ADI	获取价格	16-Bit, 200 MSPS/500 MSPS TxDAC
AD9786-EB	ADI	获取价格	16-Bit, 200 MSPS/500 MSPS TxDAC
AD9787	ADI	获取价格	Dual 12-/14-/16-Bit 800 MSPS DAC with Low Power 32-Bit Complex NCO

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