參數(shù)資料
型號(hào): AD9709ASTZRL
廠商: Analog Devices Inc
文件頁數(shù): 1/32頁
文件大?。?/td> 0K
描述: IC DAC 8BIT DUAL 125MSPS 48LQFP
產(chǎn)品培訓(xùn)模塊: Data Converter Fundamentals
DAC Architectures
標(biāo)準(zhǔn)包裝: 2,000
系列: TxDAC+®
設(shè)置時(shí)間: 35ns
位數(shù): 8
數(shù)據(jù)接口: 并聯(lián)
轉(zhuǎn)換器數(shù)目: 2
電壓電源: 模擬和數(shù)字
功率耗散(最大): 450mW
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 48-LQFP
供應(yīng)商設(shè)備封裝: 48-LQFP(7x7)
包裝: 帶卷 (TR)
輸出數(shù)目和類型: 4 電流,單極;4 電流,雙極
采樣率(每秒): 125M
配用: AD9709-EBZ-ND - BOARD EVAL FOR AD9709
8-Bit, 125 MSPS, Dual TxDAC+
Digital-to-Analog Converter
AD9709
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
2000–2009 Analog Devices, Inc. All rights reserved.
FEATURES
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
On-chip 1.2 V reference
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
APPLICATIONS
Communications
Base stations
Digital synthesis
Quadrature modulation
3D ultrasound
FUNCTIONAL BLOCK DIAGRAM
1
LATCH
1
DAC
BIAS
GENERATOR
SLEEP
DIGITAL
INTERFACE
AD9709
PORT1
PORT2
WRT1/IQWRT
WRT2/IQSEL
CLK2/IQ RESET
MODE
2
DAC
2
LATCH
IOUTB2
IOUTA2
IOUTB1
IOUTA1
CLK1
DCOM1/
DCOM2
DVDD1/
DVDD2
AVDD
ACOM
GAINCTRL
FSADJ2
FSADJ1
REFIO
REFERENCE
0
06
-0
01
Figure 1.
GENERAL DESCRIPTION
The AD97091 is 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 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.
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.
The GAINCTRL pin allows two modes for setting the full-scale
current (IOUTFS) of the two DACs. IOUTFS for each DAC can be set
independently using two external resistors, or IOUTFS for 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.
The DACs utilize a segmented current source architecture
combined 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 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%.
1 Patent pending.
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.
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.
3.
Matching. Gain matching is typically 0.1% of full scale, and
offset error is better than 0.02%.
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.
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AD9709ASTZRL1 制造商:AD 制造商全稱:Analog Devices 功能描述:8-Bit, 125 MSPS, Dual TxDAC Digital-to-Analog Converter
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AD9709-EBZ1 制造商:AD 制造商全稱:Analog Devices 功能描述:8-Bit, 125 MSPS, Dual TxDAC Digital-to-Analog Converter
AD9712 制造商:AD 制造商全稱:Analog Devices 功能描述:12-BIT, 100MSPS D/A CONVERTERS