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AD5556

更新时间： 2024-11-05 22:49:59
品牌 Logo 应用领域
亚德诺 - ADI 转换器数模转换器
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32页 925K
描述
Dual 8-,10-,12-Bit High Bandwidth Multiplying DACs with Serial Interface

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Dual 8-,10-,12-Bit High Bandwidth  
Multiplying DACs with Serial Interface  
AD5429/AD5439/AD5449  
FEATURES  
10 MHz multiplying bandwidth  
FUNCTIONAL BLOCK DIAGRAM  
V
A
REF  
50 MHz serial interface  
2.5 V to 5.5 V supply operation  
10 V reference input  
Pin compatible 8-, 10-, and 12-bit DACs  
Extended temperature range: −40°C to +125°C  
16-lead TSSOP package  
RFB  
R
AD5429/AD5439/AD5449  
V
DD  
R
A
FB  
SYNC  
I
I
1A  
OUT  
OUT  
SHIFT  
INPUT  
DAC  
REGISTER  
8-/10-/12-BIT  
R-2R DAC A  
SCLK  
SDIN  
REGISTER  
REGISTER  
2A  
SDO  
CLR  
LDAC  
Guaranteed monotonic  
Power-on reset  
I
I
1B  
2B  
OUT  
INPUT  
REGISTER  
DAC  
REGISTER  
8-/10-/12-BIT  
R-2R DAC B  
POWER-ON  
RESET  
OUT  
Daisy-chain mode  
Readback function  
0.5 µA typical current consumption  
R
B
FB  
RFB  
R
LDAC  
V
B
REF  
Figure 1.  
APPLICATIONS  
Portable battery-powered applications  
Waveform generators  
GENERAL DESCRIPTION  
The AD5429/AD5439/AD54491 are CMOS 8-, 10-, and 12-bit  
dual-channel current output digital-to-analog converters,  
respectively. These devices operate from a 2.5 V to 5.5 V power  
supply, making them suited to battery-powered and other  
applications.  
Analog processing  
Instrumentation applications  
Programmable amplifiers and attenuators  
Digitally controlled calibration  
Programmable filters and oscillators  
Composite video  
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 current-to-voltage  
precision amplifier.  
Ultrasound  
Gain, offset, and voltage trimming  
These DACs utilize a double-buffered, 3-wire serial interface  
that is compatible with SPI®, QSPI™, MICROWIRE™, and most  
DSP interface standards. In addition, a serial data out pin (SDO)  
allows daisy-chaining when multiple packages are used. Data  
readback allows the user to read the contents of the DAC  
register via the SDO pin. On power-up, the internal shift  
register and latches are filled with zeros and the DAC outputs  
are at zero scale.  
As a result of manufacture on a CMOS submicron process,  
these parts offer excellent 4-quadrant multiplication character-  
istics, with large signal multiplying bandwidths of 10 MHz.  
The AD5429/AD5439/AD5449 DAC are available in 16-lead  
TSSOP packages.  
1 US Patent Number 5,689,257.  
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  
registered trademarks are the property of their respective owners.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781.329.4700  
Fax: 781.326.8703  
www.analog.com  
© 2004 Analog Devices, Inc. All rights reserved.  
 
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