AD9125

更新时间： 2024-09-24 06:36:11

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
56页	863K
描述
Dual, 16-Bit, 1000 MSPS, TxDAC+ Digital-to-Analog Converter

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AD9125 数据手册

Dual, 16-Bit, 1000 MSPS,

TxDAC+ Digital-to-Analog Converter

AD9125

FEATURES

GENERAL DESCRIPTION

Flexible CMOS interface allows dual-word, word, or byte load

Single-carrier W-CDMA ACLR = 80 dBc at 122.88 MHz IF

Analog output: adjustable 8.7 mA to 31.7 mA, R_L= 25 Ω to 50 Ω

Novel 2×/4×/8× interpolator/complex modulator allows

carrier placement anywhere in the DAC bandwidth

Gain and phase adjustment for sideband suppression

Multichip synchronization interface

High performance, low noise PLL clock multiplier

Digital inverse sinc filter

Low power: 900 mW at 500 MSPS, full operating conditions

72-lead, exposed paddle LFCSP

The AD9125 is a dual, 16-bit, high dynamic range TxDAC+®

digital-to-analog converter (DAC) that provides a sample rate of

1000 MSPS, permitting a multicarrier generation up to the Nyquist

frequency. It includes features optimized for direct conversion

transmit applications, including complex digital modulation,

and gain and offset compensation. The DAC outputs are optimized

to interface seamlessly with analog quadrature modulators, such

as the ADL537x F-MOD series from Analog Devices, Inc. A 4-wire

serial port interface allows programming/readback of many inter-

nal parameters. Full-scale output current can be programmed

over a range of 8.7 mA to 31.7 mA. The AD9125 comes in a

72-lead LFCSP.

APPLICATIONS

PRODUCT HIGHLIGHTS

Wireless infrastructure

W-CDMA, CDMA2000, TD-SCDMA, WiMAX, GSM, LTE

Digital high or low IF synthesis

Transmit diversity

1. Ultralow noise and intermodulation distortion (IMD)

enable high quality synthesis of wideband signals from

baseband to high intermediate frequencies.

Wideband communications: LMDS/MMDS, point-to-point

Cable modem termination systems

2. A proprietary DAC output switching technique enhances

dynamic performance.

3. The current outputs are easily configured for various

single-ended or differential circuit topologies.

4. The flexible CMOS digital interface allows the standard

32-wire bus to be reduced to a 16-wire bus.

TYPICAL SIGNAL CHAIN

COMPLEX BASEBAND

COMPLEX IF

LO – f

I DAC

2/4

SIN

DIGITAL

ANTIALIASING

FILTER

BASEBAND

AQM

PROCESSOR

COS

Q DAC

NOTES

1. AQM = ANALOG QUADRATURE MODULATOR.

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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