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AD779JN

更新时间: 2024-11-08 22:22:27
品牌 Logo 应用领域
亚德诺 - ADI 转换器模数转换器光电二极管信息通信管理
页数 文件大小 规格书
12页 219K
描述
14-Bit 128 kSPS Complete Sampling ADC

AD779JN 数据手册

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14-Bit 128 kSPS  
Complete Sampling ADC  
a
AD779*  
FEATURES  
FUNCTIO NAL BLO CK D IAGRAM  
AC and DC Characterized and Specified (K, B, T  
Grades)  
128k Conversions per Second  
1 MHz Full Pow er Bandw idth  
500 kHz Full Linear Bandw idth  
80 dB S/ N+D (K, B, T Grades)  
Tw os Com plem ent Data Form at (Bipolar Mode)  
Straight Binary Data Form at (Unipolar Mode)  
10 MInput Im pedance  
16-Bit Bus Interface (See AD679 for 8-Bit Interface)  
Onboard Reference and Clock  
10 V Unipolar or Bipolar Input Range  
MIL-STD-883 Com pliant Versions Available  
P RO D UCT D ESCRIP TIO N  
P RO D UCT H IGH LIGH TS  
T he AD779 is a complete, multipurpose 14-bit monolithic  
analog-to-digital converter, consisting of a sample-hold amplifier  
(SHA), a microprocessor compatible bus interface, a voltage  
reference and clock generation circuitry.  
l. COMPLET E INT EGRAT ION: T he AD779 minimizes  
external component requirements by combining a high speed  
sample-hold amplifier (SHA), ADC, 5 V reference, clock  
and digital interface on a single chip. T his provides a fully  
specified sampling A/D function unattainable with discrete  
designs.  
T he AD779 is specified for ac (or “dynamic”) parameters such  
as S/N+D ratio, T HD and IMD which are important in signal  
processing applications. In addition, the AD779K, B and T  
grades are fully specified for dc parameters which are important  
in measurement applications.  
2. SPECIFICAT IONS: T he AD779K, B and T grades provide  
fully specified and tested ac and dc parameters. T he AD779J,  
A and S grades are specified and tested for ac parameters; dc  
accuracy specifications are shown as typicals. DC specifica-  
tions (such as INL, gain and offset) are important in control  
and measurement applications. AC specifications (such as  
S/N+D ratio, T HD and IMD) are of value in signal process-  
ing applications.  
T he 14 data bits are accessed by a 16-bit bus in a single read  
operation. Data format is straight binary for unipolar mode and  
twos complement binary for bipolar mode. T he input has a full-  
scale range of 10 V with a full power bandwidth of 1 MHz and a  
full linear bandwidth of 500 kHz. High input impedance (10 M)  
allows direct connection to unbuffered sources without signal  
degradation.  
3. EASE OF USE: T he pinout is designed for easy board lay-  
out, and the single cycle read output provides compatibility  
with 16-bit buses. Factory trimming eliminates the need for  
calibration modes or external trimming to achieve rated  
performance.  
T his product is fabricated on Analog Devices’ BiMOS process,  
combining low power CMOS logic with high precision, low  
noise bipolar circuits; laser-trimmed thin-film resistors provide  
high accuracy. T he converter utilizes a recursive subranging  
algorithm which includes error correction and flash converter  
circuitry to achieve high speed and resolution.  
4. RELIABILIT Y: T he AD779 utilizes Analog Devices’  
monolithic BiMOS technology. T his ensures long term  
reliability compared to multichip and hybrid designs.  
T he AD779 operates from +5 V and ±12 V supplies and  
dissipates 560 mW (typ). T wenty-eight-pin plastic DIP and  
ceramic DIP packages are available.  
5. T he AD779 is available in versions compliant with MIL-  
ST D-883. Refer to the Analog Devices Military Products  
Databook or current AD779/883B data sheet for detailed  
specifications.  
*P r otected by U.S. P atent Num ber s 4,804,960; 4,814,767; 4,833,345;  
4,250,445; 4,808,908; RE 30,586.  
REV. B  
Inform ation furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assum ed by Analog Devices for its  
use, nor for any infringem ents of patents or other rights of third parties  
which m ay result from its use. No license is granted by im plication or  
otherwise under any patent or patent rights of Analog Devices.  
One Technology Way, P.O. Box 9106, Norw ood, MA 02062-9106, U.S.A.  
Tel: 617/ 329-4700  
Fax: 617/ 326-8703  

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