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參數(shù)資料
| 型號(hào)： | MODEL 5B36 |
| 廠商： | Analog Devices, Inc. |
| 元件分類： | 數(shù)字電位計(jì) |
| 英文描述： | Potentiometer RTD Input Module(電位測(cè)試功能的RTD輸入模塊) |
| 中文描述： | 電位器電阻輸入模塊（電位測(cè)試功能的熱電阻輸入模塊） |
| 文件頁數(shù)： | 1/2頁 |
| 文件大?。?/td> | 149K |
| 代理商： | MODEL 5B36 |
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
MODEL 5B36
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
World Wide Web Site: http://www.analog.com
Fax: 781/326-8703
Analog Devices, Inc., 1997
Potentiometer
Input Module
FUNCTIONAL BLOCK DIAGRAM
GENERAL DESCRIPTION
Model 5B36 converts the input from a variety of potentiometers
and variable resistors to a high level output of 0 V to +5 V. The
module provides transformer isolation, potentiometer excitation,
signal filtering and input protection against line voltage connec-
tion. The series output switch eliminates the need for external
multiplexing. The industry standard 5B Series encapsulated
plug-in modular package is compatible with all 5B backplanes.
Modules are powered by +5 V dc,
±
5%.
Signal isolation is provided by transformer coupling using a
proprietary technique for linear, stable performance. A demodu-
lator on the output side of the signal transformer recovers the
input signal, which is filtered and buffered to provide an accu-
rate, low impedance, low noise output.
True three-port isolation includes common-mode voltage of:
1500 V rms between input and output, and between input and
power; 250 V rms between output and power.
The modules provide potentiometer excitation from a precision
current source. A low drift, chopper stabilized, differential
amplifier design allows for the use of very low excitation currents
to minimize accuracy losses from self-heating of the potentiom-
eter. The low gain drift of
±
30 ppm/
°
C and low offset drift
assure that accuracy is maintained over a wide operating tem-
perature range.
The 5B36 supplies equal excitation currents to three-wire
potentiometers to cancel the effects of lead resistance.
An optimized five-pole Butterworth filter (with 4 Hz bandwidth)
provides 116 dB of normal-mode rejection at 60 Hz and 108 dB
FEATURES
Accepts Potentiometers up to 10,000
V
High Level 0 V to +5 V Output
1500 V rms Input/Output and Input/Power Isolation
250 V rms Output/Power Isolation
240 V rms Field Wiring Protection
170 dB CMRR
116 dB NMR @ 60 Hz, 108 dB @ 50 Hz
Low Gain Drift:
6
30 ppm/
8
C
Low Output Noise:
0.3 mV p-p @ 100 kHz BW
6 mV p-p @ 5 MHz BW
Low Power Consumption: +5 V dc @ 15 mA
ANSI/IEEE C37.90.1–1989 Transient Protection
CSA, FM and CE Approvals
at 50 Hz. Output noise is an exceptionally low 0.3 mV p-p at
100 kHz bandwidth and 6 mV p-p at 5 MHz bandwidth.
The input circuit is protected against accidental application of
voltages, such as an ac power line, up to 240 V rms continuous.
A series output switch is included to eliminate the need for
external multiplexing in many applications. This switch has a
low output resistance and is controlled by an active-low enable
input. When the output switch is not used, ground the enable
input to I/O common to turn on the switch.
4
3
2
1
SIGNAL
ISOLATION
CHOPPER
DIF AMP
4-POLE
ACTIVE
LPF
P.S.
POWER
ISOLATION
RECT.
AND
FILTER
POWER
OSC.
V
OUT
I/O
COM
READ
EN (0)
1
5V
PWR
COM
NC
PROT
NC
5B
BACKPLANE
5B36
–
1
PROT.
&
FILTER
NC
1
–
NC = NO CONNECT
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