AD9761ARS

更新时间： 2024-09-24 22:50:03

品牌	Logo	应用领域
亚德诺 - ADI		转换器数模转换器光电二极管
页数	文件大小	规格书
23页	249K
描述
Dual 10-Bit TxDAC+⑩ with 2x Interpolation Filters

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AD9761ARS 数据手册

Dual 10-Bit TxDAC+™

with 2

Interpolation Filters

AD9761

FUNCTIONAL BLOCK DIAGRAM

CLOCK

FEATURES

Complete 10-Bit, 40 MSPS Dual Transmit DAC

Excellent Gain and Offset Matching

Differential Nonlinearity Error: 0.5 LSB

Effective Number of Bits: 9.5

Signal-to-Noise and Distortion Ratio: 59 dB

Spurious-Free Dynamic Range: 71 dB

Interpolation Filters

20 MSPS/Channel Data Rate

Single Supply: +2.7 V to +5.5 V

Low Power Dissipation: 200 mW (+3 V Supply @

40 MSPS)

DCOM

DVDD

ACOM

AVDD

IOUTA

IOUTB

"I"

DAC

LATCH

"I"

SLEEP

REFLO

FSADJ

REFIO

REFERENCE

DAC DATA

INPUTS

(10 BITS)

COMP1

COMP2

COMP3

BIAS

GENERATOR

"Q"

QOUTA

QOUTB

LATCH

"Q"

DAC

On-Chip Reference

28-Lead SSOP

WRITE INPUT

SELECT INPUT

MUX

CONTROL

AD9761

PRODUCT DESCRIPTION

The AD9761 is a complete dual channel, high speed, 10-bit

CMOS DAC. The AD9761 has been developed specifically for

use in wide bandwidth communication applications (e.g., spread

spectrum) where digital I and Q information is being processed

during transmit operations. It integrates two 10-bit, 40 MSPS

DACs, dual 2× interpolation filters, a voltage reference, and

digital input interface circuitry. The AD9761 supports a

20 MSPS per channel input data rate that is then interpolated

by 2× up to 40 MSPS before simultaneously updating each

DAC.

PRODUCT HIGHLIGHTS

1. Dual 10-Bit, 40 MSPS DACs: A pair of high performance

40 MSPS DACs optimized for low distortion performance

provide for flexible transmission of I and Q information.

2. 2× Digital Interpolation Filters: Dual matching FIR interpo-

lation filters with 62.5 dB stop band rejection precede each

DAC input thus reducing the DACs’ reconstruction filter

requirements.

The interleaved I and Q input data stream is presented to the

digital interface circuitry, which consists of I and Q latches as well

as some additional control logic. The data is de-interleaved back

into its original I and Q data. An on-chip state machine ensures the

proper pairing of I and Q data. The data output from each latch is

then processed by a 2× digital interpolation filter that eases the

reconstruction filter requirements. The interpolated output of each

filter serves as the input of their respective 10-bit DAC.

3. Low Power: Complete CMOS Dual DAC function operates

on a low 200 mW on a single supply from 2.7 V to 5.5 V.

The DAC full-scale current can be reduced for lower power

operation, and a sleep mode is provided for power reduction

during idle periods.

4. On-Chip Voltage Reference: The AD9761 includes a 1.20 V

temperature-compensated bandgap voltage reference.

5. Single 10-Bit Digital Input Bus: The AD9761 features a

flexible digital interface allowing each DAC to be addressed

in a variety of ways including different update rates.

The DACs utilize a segmented current source architecture com-

bined with a proprietary switching technique to reduce glitch

energy and to maximize dynamic accuracy. Each DAC provides

differential current output thus supporting single-ended or

differential applications. Both DACs are simultaneously up-

dated and provide a nominal full-scale current of 10 mA. Also,

the full-scale currents between each DAC are matched to within

0.07 dB (i.e., 0.75%), thus eliminating the need for additional

gain calibration circuitry.

6. Small Package: The AD9761 offers the complete integrated

function in a compact 28-lead SSOP package.

7. Product Family: The AD9761 Dual Transmit DAC has a

pair of Dual Receive ADC companion products, the AD9281

(8 bits) and AD9201 (10 bits).

The AD9761 is manufactured on an advanced low cost CMOS

process. It operates from a single supply of 2.7 V to 5.5 V and

consumes 200 mW of power. To make the AD9761 complete it

also offers an internal 1.20 V temperature-compensated bandgap

reference.

TxDAC+ is a trademark of Analog Devices, Inc.

REV. A

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

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

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

Tel: 781/329-4700

Fax: 7817/326-8703

World Wide Web Site: http://www.analog.com

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AD9761ARS 替代型号

型号	品牌	替代类型	描述	数据表
AD9761ARSZ	ADI	完全替代	10-Bit, Complete, 40 MSPS, dual Transmit D/A Converter
AD9761ARSRL	ADI	完全替代	10-Bit, Complete, 40 MSPS, dual Transmit D/A Converter
AD9761ARSZRL	ADI	类似代替	10-Bit, Complete, 40 MSPS, dual Transmit D/A Converter

与AD9761ARS相关器件

型号	品牌	获取价格	描述	数据表
AD9761-ARS	ETC	获取价格	10-Bit Digital-to-Analog Converter
AD9761ARSRL	ADI	获取价格	10-Bit, Complete, 40 MSPS, dual Transmit D/A Converter
AD9761ARSRL	ROCHESTER	获取价格	DUAL, PARALLEL, WORD INPUT LOADING, 0.035 us SETTLING TIME, 10-BIT DAC, PDSO28, MO-150AH,
AD9761ARSZ	ADI	获取价格	10-Bit, Complete, 40 MSPS, dual Transmit D/A Converter
AD9761ARSZ	ROCHESTER	获取价格	DUAL, PARALLEL, WORD INPUT LOADING, 0.035 us SETTLING TIME, 10-BIT DAC, PDSO28, SSOP-28
AD9761ARSZRL	ROCHESTER	获取价格	DUAL, PARALLEL, WORD INPUT LOADING, 0.035 us SETTLING TIME, 10-BIT DAC, PDSO28, SSOP-28
AD9761ARSZRL	ADI	获取价格	10-Bit, Complete, 40 MSPS, dual Transmit D/A Converter
AD9761-EB	ADI	获取价格	Dual 10-Bit TxDAC+⑩ with 2x Interpolation Fil
AD9762	ADI	获取价格	12-Bit, 125 MSPS TxDAC D/A Converter
AD9762*	ADI	获取价格	12-Bit. 125 MSPS TxDAC D/A Converter

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