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EVAL-AD5447EBZ

更新时间： 2024-09-30 12:27:15
品牌 Logo 应用领域
亚德诺 - ADI /
页数 文件大小 规格书
32页 717K
描述
Dual 8-/10-/12-Bit, High Bandwidth, Multiplying DACs with Parallel Interface

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Dual 8-/10-/12-Bit, High Bandwidth,  
Multiplying DACs with Parallel Interface  
AD5428/AD5440/AD5447  
Data Sheet  
FEATURES  
GENERAL DESCRIPTION  
10 MHz multiplying bandwidth  
INL of 0.2ꢀ LSB ꢁ 8 bits  
20-lead and 24-lead TSSOP packages  
2.ꢀ V to ꢀ.ꢀ V supply operation  
10 V reference input  
The AD5428/AD5440/AD54471 are CMOS, 8-, 10-, and 12-bit,  
dual-channel, current output digital-to-analog converters (DACs),  
respectively. These devices operate from a 2.5 V to 5.5 V power  
supply, making them suited to battery-powered and other  
applications.  
21.3 MSPS update rate  
As a result of being manufactured on a CMOS submicron process,  
they offer excellent 4-quadrant multiplication characteristics,  
with large signal multiplying bandwidths of up to 10 MHz.  
Extended temperature range: −40°C to +12ꢀ°C  
4-quadrant multiplication  
Power-on reset  
0.ꢀ μA typical current consumption  
Guaranteed monotonic  
Readback function  
AD7ꢀ28 upgrade (ADꢀ428)  
AD7ꢀ47 upgrade (ADꢀ447)  
The DACs use data readback, allowing the user to read the  
contents of the DAC register via the DB pins. On power-up, the  
internal register and latches are filled with 0s, and the DAC  
outputs are at zero scale.  
The applied external reference input voltage (VREF) determines  
the full-scale output current. An integrated feedback resistor (RFB)  
provides temperature tracking and full-scale voltage output when  
combined with an external I-to-V precision amplifier.  
APPLICATIONS  
Portable battery-powered applications  
Waveform generators  
Analog processing  
The AD5428 is available in a small 20-lead TSSOP package, and  
the AD5440/AD5447 DACs are available in small 24-lead TSSOP  
packages.  
Instrumentation applications  
Programmable amplifiers and attenuators  
Digitally controlled calibration  
Programmable filters and oscillators  
Composite video  
1 U.S. Patent Number 5,689,257.  
Ultrasound  
Gain, offset, and voltage trimming  
FUNCTIONAL BLOCK DIAGRAM  
V
A
REF  
AD5428/AD5440/AD5447  
R
V
R
A
DD  
FB  
DB0  
DATA  
INPUTS  
I
A
OUT  
INPUT  
BUFFER  
8-/10-/12-BIT  
R-2R DAC A  
LATCH  
DB7  
DB9  
DB11  
AGND  
DAC A/B  
R
R
I
B
CONTROL  
LOGIC  
FB  
CS  
B
R/W  
OUT  
8-/10-/12-BIT  
R-2R DAC B  
LATCH  
DGND  
POWER-ON  
RESET  
V
B
REF  
Figure 1. AD5428/AD5440/AD5447  
Rev. C  
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 ofthird parties that may result fromits use. Specifications subject to change without notice. No  
licenseis granted byimplication 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  
Fax: 781.461.3113 ©2004–2011 Analog Devices, Inc. All rights reserved.  
 
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