Datasheet > AD9267

AD9267

更新时间： 2024-10-28 06:36:15

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
24页	524K
描述
10 MHz Bandwidth, 640 MSPS Dual Continuous Time Sigma-Delta Modulator

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AD9267 数据手册

10 MHz Bandwidth, 640 MSPS

Dual Continuous Time Sigma-Delta Modulator

AD9267

FUNCTIONAL BLOCK DIAGRAM

FEATURES

AVDD PDWNB

PDWNA

DRVDD

SNR: 83 dB (85 dBFS) to 10 MHz input

SFDR: −88 dBc to 10 MHz input

Noise figure: 15 dB

Input impedance: 1 kΩ

Power: 416 mW

10 MHz real or 20 MHz complex bandwidth

1.8 V analog supply operation

On-chip PLL clock multiplier

On-chip voltage reference

Twos complement data format

640 MSPS, 4-bit LVDS data output

Serial control interface (SPI)

OR±A

D3±A

VIN+A

VIN–A

Σ-Δ

MODULATOR

D0±A

PLL_LOCKED

PLLMULT4

PLLMULT3

PLLMULT2

AD9267

CLK+

CLK–

PHASE-

LOCKED

LOOP

VREF

CFILT

DCO±

D3±B

VIN–B

VIN+B

Σ-Δ

MODULATOR

D0±B

OR±B

APPLICATIONS

SERIAL

INTERFACE

Baseband quadrature receivers: CDMA2000, W-CDMA,

multicarrier GSM/EDGE, 802.16x, and LTE

Quadrature sampling instrumentation

AGND

SDIO/

SCLK/

CSB DGND

PLLMULT1 PLLMULT0

GENERAL DESCRIPTION

Figure 1.

The AD9267 is a dual continuous time (CT) sigma-delta (Σ-Δ)

modulator with −88 dBc of dynamic range over 10 MHz real

or 20 MHz complex bandwidth. The combination of high

dynamic range, wide bandwidth, and characteristics unique

to the continuous time Σ-Δ modulator architecture makes the

AD9267 an ideal solution for wireless communication systems.

The AD9267 operates on a 1.8 V power supply, consuming

416 mW. The AD9267 is available in a 64-lead LFCSP and

is specified over the industrial temperature range (−40°C

to +85°C).

PRODUCT HIGHLIGHTS

1. Continuous time Σ-Δ architecture efficiently achieves high

dynamic range and wide bandwidth.

2. Passive input structure reduces or eliminates the require-

ments for a driver amplifier.

3. An oversampling ratio of 32× and high order loop filter

provide excellent alias rejection, reducing or eliminating

the need for antialiasing filters.

4. Operates from a single 1.8 V power supply.

5. A standard serial port interface (SPI) supports various

product features and functions.

The AD9267 has a resistive input impedance that significantly

relaxes the requirements of the driver amplifier. In addition, a

32× oversampled fifth-order continuous time loop filter attenuates

out-of-band signals and aliases, reducing the need for external

filters at the input. The low noise figure of 15 dB relaxes the

linearity requirements of the front-end signal chain components,

and the high dynamic range reduces the need for an automatic

gain control (AGC) loop.

A differential input clock controls all internal conversion cycles.

An external clock input or the integrated integer-N PLL provides

the 640 MHz internal clock needed for the oversampled conti-

nuous time Σ-Δ modulator. The digital output data is presented

as 4-bit, LVDS at 640 MSPS in twos complement format. A data

clock output (DCO) is provided to ensure proper latch timing

with receiving logic. Additional digital signal processing may be

required on the 4-bit modulator output to remove the out-of-band

noise and to reduce the sample rate.

6. Features a low pin count, high speed LVDS interface with

data output clock.

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...24

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与AD9267相关器件

型号	品牌	获取价格	描述	数据表
AD9267BCPZ	ADI	获取价格	10 MHz Bandwidth, 640 MSPS Dual Continuous Time Sigma-Delta Modulator
AD9267EBZ	ADI	获取价格	10 MHz Bandwidth, 640 MSPS Dual Continuous Time Sigma-Delta Modulator
AD9268	ADI	获取价格	16-Bit, 80 MSPS/105 MSPS/125 MSPS, 1.8 V Dual Analog-to-Digital Converter (ADC)
AD9268_17	ADI	获取价格	1.8 V Dual Analog-to-Digital Converter (ADC)
AD9268-105EBZ	ADI	获取价格	1.8 V Dual Analog-to-Digital Converter (ADC)
AD9268-105EBZ1	ADI	获取价格	16-Bit, 80 MSPS/105 MSPS/125 MSPS, 1.8 V Dual Analog-to-Digital Converter (ADC)
AD9268-125EBZ	ADI	获取价格	1.8 V Dual Analog-to-Digital Converter (ADC)
AD9268-125EBZ1	ADI	获取价格	16-Bit, 80 MSPS/105 MSPS/125 MSPS, 1.8 V Dual Analog-to-Digital Converter (ADC)
AD9268-80EBZ	ADI	获取价格	1.8 V Dual Analog-to-Digital Converter (ADC)
AD9268-80EBZ1	ADI	获取价格	16-Bit, 80 MSPS/105 MSPS/125 MSPS, 1.8 V Dual Analog-to-Digital Converter (ADC)

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