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參數資料
| 型號： | AD8401AR |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 模擬信號調理 |
| 英文描述： | 8-Bit, 4-Channel Data Acquisition System |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO28 |
| 封裝： | SOIC-28 |
| 文件頁數： | 1/12頁 |
| 文件大?。?/td> | 225K |
| 代理商： | AD8401AR |
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
8-Bit, 4-Channel Data
Acquisition System
AD8401
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
FUNCT IONAL BLOCK DIAGRAM
V
OUT
DGND
AG
DAC
AG
ADC
DATA I/O
(8 BITS)
M
U
X
T/H
8-BIT ADC
1.25 REF
8-BIT
DAC
RS
INT
BUSY
ST
DAC REG
ADC REG
CONTROL LOGIC
A0 A1
V
DD
(+5.0V)
RD
WR
CLK
CS
AD8401
V
A
IN
V
B
IN
V
C
IN
V
D
IN
FEATURES
2
m
s ADC with T/H
4-Channel MUX
AD899 Compatible
+5 Volt Operation
On-Chip Reference
4
m
s Voltage Output DAC
Fast Bus Access Time—75 ns
APPLICATIONS
Servo Controls
Digitally Controlled Calibration
Process Control Equipment
GE NE RAL DE SCRIPT ION
T he AD8401 is a complete data acquisition and control system
containing ADC, DAC, 4-channel MUX , and internal voltage
reference. Built using CBCMOS, this monolithic circuit offers
the user a complete system with very high package density and
reliability.
T he converter is a successive approximation ADC with T /H,
and is capable of operating with conversion times as short as
2
μ
s. Analog input bandwidth is 200 kHz, and DAC output volt-
age settling time is less than 4
μ
s, making the AD8401 capable
of controlling servo loops with speed and precision.
T he 8-bit data interface provides both read and write operation
for parallel bus interfaces to microcontrollers and DSP proces-
sors. An external 5 MHz clock sets the 2
μ
s conversion rate.
Slower clocks reduce the conversion time and the internal power
dissipation. T he standard control lines: Reset, Busy, Interrupt,
Read and Write complete the handshaking signals for micro-
processor communication. A start trigger
ST
input allows pre-
cise sampling intervals in synchronous sampling applications.
T he input multiplexer addressing is designed for direct interface
to the AD899 hard-disk drive, read-channel device with no extra
hardware or special software. Analog input range levels are like-
wise compatible with the AD899.
T he AD8401 is designed to operate from a single +5 volt sup-
ply, which will give an ADC input range of 0 V to 3.0 V, and
DAC output range of 0 V to 2.5 V.
T he AD8401 is offered in the SOIC-28 surface mount package,
and is guaranteed to operate over the extended industrial tem-
perature range of –40
°
C to +85
°
C.
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