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AD7885AQ PDF预览

AD7885AQ

更新时间： 2024-09-27 23:27:35
品牌 Logo 应用领域
其他 - ETC 转换器
页数 文件大小 规格书
16页 191K
描述
A/D CONVERTER

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中文翻译

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AD7885AQ 数据手册

 浏览型号AD7885AQ的Datasheet PDF文件第2页浏览型号AD7885AQ的Datasheet PDF文件第3页浏览型号AD7885AQ的Datasheet PDF文件第4页浏览型号AD7885AQ的Datasheet PDF文件第5页浏览型号AD7885AQ的Datasheet PDF文件第6页浏览型号AD7885AQ的Datasheet PDF文件第7页 
LC2MOS  
a
16-Bit, High-Speed Sampling ADCs  
AD7884/AD7885  
FUNCTIONAL BLOCK DIAGRAMS  
FEATURES  
Monolithic Construction  
Fast Conversion: 5.3 ␮s  
High Throughput: 166 kSPS  
Low Power: 250 mW  
V
SS  
V
SS  
؎3V  
F ؎3V S  
IN  
AGNDS AGNDF AV AV  
DD  
IN  
DD  
R3  
C1  
3k⍀  
R2  
3k⍀  
؎5V  
؎5V  
S
IN  
AD7884  
APPLICATIONS  
A1  
F
R1  
SW1  
IN  
5k⍀  
Automatic Test Equipment  
Medical Instrumentation  
Industrial Control  
Data Acquisition Systems  
Robotics  
D
R
I
O
U
9-BIT  
ADC  
DB15  
DB0  
9
LATCH  
SW2  
R4  
T
P
U
T
V
E
R
S
R5  
4k⍀  
16  
16  
4k⍀  
+
R6  
ALU  
2k⍀  
9
V
REF–  
A2  
SW3  
16-BIT  
9
ACCURATE  
DAC  
CONTROL  
TIMER  
CS  
RD  
R7  
2k⍀  
GENERAL DESCRIPTION  
The AD7884/AD7885 is a 16-bit monolithic analog-to-digital  
converter with internal sample-and-hold and a conversion time  
of 5.3 µs. The maximum throughput rate is 166 kSPS. It uses a  
two-pass flash architecture to achieve this speed. Two input  
ranges are available: 5 V and 3 V. Conversion is initiated by  
the CONVST signal. The result can be read into a microprocessor  
using the CS and RD inputs on the device. The AD7884 has a  
16-bit parallel reading structure while the AD7885 has a byte reading  
structure. The conversion result is in two’s complement code.  
R8  
2k⍀  
V
F
V
S V  
V
REF–  
CONVST BUSY DGND  
GND  
REF+  
REF+  
INV  
V
V
SS  
؎3V  
AGNDS AGNDF AV AV  
DD SS  
DD  
IN  
R3  
R2  
C1  
3k⍀  
3k⍀  
؎5V  
؎5V  
S
IN  
AD7885  
A1  
F
R1  
SW1  
IN  
5k⍀  
The AD7884/AD7885 has its own internal oscillator which controls  
conversion. It runs from 5 V supplies and needs a VREF+ of 3 V.  
D
R
I
O
U
9-BIT  
ADC  
DB7  
DB0  
9
The AD7884 is available in a 40-lead Cerdip package and in a  
44-lead PLCC package.  
LATCH  
+
ALU  
SW2  
R4  
4k⍀  
T
P
U
T
V
E
R
S
R5  
4k⍀  
8
16  
R6  
2k⍀  
9
V
REF–  
The AD7885 is available in a 28-lead Cerdip package and the AD7885A  
is available in a 44-lead PLCC package.  
A2  
SW3  
16-BIT  
9
ACCURATE  
DAC  
CONTROL  
TIMER  
CS  
RD  
R7  
2k⍀  
HBEN  
R8  
2k⍀  
V
F
V
S V  
V
REF–  
CONVST BUSY DGND  
GND  
REF+  
REF+  
INV  
REV. D  
Information furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assumed by Analog Devices for its  
use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat  
may result from its use. No license is granted by implication or otherwise  
under any patent or patent rights of Analog Devices.  
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  
© Analog Devices, Inc., 2002  
1234567...16

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