Datasheet > AD9709-EBZ1

AD9709-EBZ1

更新时间： 2024-09-28 12:53:51

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
32页	597K
描述
8-Bit, 125 MSPS, Dual TxDAC Digital-to-Analog Converter

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AD9709-EBZ1 数据手册

8-Bit, 125 MSPS, Dual TxDAC+

Digital-to-Analog Converter

AD9709

FEATURES

FUNCTIONAL BLOCK DIAGRAM

DVDD1/ DCOM1/

DVDD2 DCOM2 AVDD ACOM

8-bit dual transmit digital-to-analog converter (DAC)

125 MSPS update rate

Excellent SFDR to Nyquist @ 5 MHz output: 66 dBc

Excellent gain and offset matching: 0.1%

Fully independent or single-resistor gain control

Dual port or interleaved data

CLK1

OUTA1

OUTB1

DAC

PORT1

LATCH

REFIO

FSADJ1

FSADJ2

GAINCTRL

REFERENCE

WRT1/IQWRT

WRT2/IQSEL

DIGITAL

AD9709

INTERFACE

On-chip 1.2 V reference

BIAS

GENERATOR

SLEEP

Single 5 V or 3.3 V supply operation

Power dissipation: 380 mW @ 5 V

Power-down mode: 50 mW @ 5 V

48-lead LQFP

OUTA2

DAC

PORT2

LATCH

OUTB2

MODE

CLK2/IQ RESET

Figure 1.

APPLICATIONS

Communications

Base stations

Digital synthesis

Quadrature modulation

3D ultrasound

glitch energy and to maximize dynamic accuracy. Each DAC

provides differential current output, thus supporting single-

ended or differential applications. Both DACs can be

simultaneously updated and provide a nominal full-scale

current of 20 mA. The full-scale currents between each DAC

are matched to within 0.1%.

GENERAL DESCRIPTION

The AD9709¹is a dual-port, high speed, 2-channel, 8-bit CMOS

DAC. It integrates two high quality 8-bit TxDAC+® cores, a voltage

reference, and digital interface circuitry into a small 48-lead LQFP

package. The AD9709 offers exceptional ac and dc performance

while supporting update rates of up to 125 MSPS.

The AD9709 is manufactured on an advanced low-cost CMOS

process. It operates from a single supply of 3.3 V or 5 V and

consumes 380 mW of power.

The AD9709 has been optimized for processing I and Q data in

communications applications. The digital interface consists of two

double-buffered latches as well as control logic. Separate write

inputs allow data to be written to the two DAC ports independent

of one another. Separate clocks control the update rate of the DACs.

PRODUCT HIGHLIGHTS

1. The AD9709 is a member of a pin-compatible family of

dual TxDACs providing 8-, 10-, 12-, and 14-bit resolution.

2. Dual 8-Bit, 125 MSPS DACs. A pair of high performance

DACs optimized for low distortion performance provide

for flexible transmission of I and Q information.

A mode control pin allows the AD9709 to interface to two separate

data ports, or to a single interleaved high speed data port. In inter-

leaving mode, the input data stream is demuxed into its original

I and Q data and then latched. The I and Q data is then converted

by the two DACs and updated at half the input data rate.

3. Matching. Gain matching is typically 0.1% of full scale, and

offset error is better than 0.02%.

The GAINCTRL pin allows two modes for setting the full-scale

current (I_OUTFS) of the two DACs. I_OUTFSfor each DAC can be set

independently using two external resistors, or I_OUTFSfor both

DACs can be set by using a single external resistor. See the Gain

Control Mode section for important date code information on

this feature.

4. Low Power. Complete CMOS dual DAC function operates

at 380 mW from a 3.3 V or 5 V single supply. The DAC

full-scale current can be reduced for lower power operation,

and a sleep mode is provided for low power idle periods.

5. On-Chip Voltage Reference. The AD9709 includes a 1.20 V

temperature-compensated band gap voltage reference.

6. Dual 8-Bit Inputs. The AD9709 features a flexible dual-

port interface, allowing dual or interleaved input data.

The DACs utilize a segmented current source architecture

combined with a proprietary switching technique to reduce

¹Patent pending.

Rev. B

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

www.analog.com

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与AD9709-EBZ1相关器件

型号	品牌	获取价格	描述	数据表
AD9712	ADI	获取价格	12-BIT, 100MSPS D/A CONVERTERS
AD9712AJN	ADI	获取价格	IC PARALLEL, WORD INPUT LOADING, 0.022 us SETTLING TIME, 12-BIT DAC, PDIP28, PLASTIC, DIP-
AD9712AJP	ADI	获取价格	IC PARALLEL, WORD INPUT LOADING, 0.022 us SETTLING TIME, 12-BIT DAC, PQCC28, PLASTIC, LCC-
AD9712AKN	ADI	获取价格	IC PARALLEL, WORD INPUT LOADING, 0.022 us SETTLING TIME, 12-BIT DAC, PDIP28, PLASTIC, DIP-
AD9712AKP	ADI	获取价格	IC PARALLEL, WORD INPUT LOADING, 0.022 us SETTLING TIME, 12-BIT DAC, PQCC28, PLASTIC, LCC-
AD9712ASJ	ADI	获取价格	IC PARALLEL, WORD INPUT LOADING, 0.022 us SETTLING TIME, 12-BIT DAC, CQCC28, J LEAD, CERAM
AD9712ASQ	ADI	获取价格	IC PARALLEL, WORD INPUT LOADING, 0.022 us SETTLING TIME, 12-BIT DAC, CDIP28, CERDIP-28, Di
AD9712ATJ	ADI	获取价格	IC PARALLEL, WORD INPUT LOADING, 0.022 us SETTLING TIME, 12-BIT DAC, CQCC28, J LEAD, CERAM
AD9712ATQ	ADI	获取价格	IC PARALLEL, WORD INPUT LOADING, 0.022 us SETTLING TIME, 12-BIT DAC, CDIP28, CERDIP-28, Di
AD9712B	ADI	获取价格	12-Bit, 100 MSPS D/A Converters

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