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參數(shù)資料
| 型號： | ISC302C |
| 英文描述： | Optoelectronic |
| 中文描述： | 光電 |
| 文件頁數(shù)： | 9/11頁 |
| 文件大?。?/td> | 141K |
| 代理商： | ISC302C |
ISC300
9
Com 1
+In
–In
Undefined
–V
ISO
I
2
I
1
R
S
Output Undefined
FIGURE 13. –In and +In Open Circuit.
APPLICATIONS FLEXIBILITY
ISOLATED VOLTAGE MEASUREMENT CHANNEL
Figure 15 shows the ISC300 configured for a
±
10V input.
With a few external components the ISC300 can accurately
convert a
±
10V input to an isolated
±
10V output with no
external adjustments. The primary function of the output
circuitry is to add gain to convert the
±
5V output of the
ISC300 to
±
10V, and to reduce output impedance. The
addition of a few resistors and capacitors provides an active
low pass filter with a cut off frequency of typically 200Hz.
The filter response is flat to 1dB and rolls off from cut off
at –12dB per octave.
ISOLATED MEASUREMENT BRIDGE CIRCUIT
Figure 16 shows a measurement bridge circuit using the
ISC300. All the input circuitry is powered by the ISC300
isolated supplies. The OPA1013 dual op amp is used to
Com 1
+In
–In
Undefined
–V
ISO
I
2
I
1
R
S
Output Undefined
FIGURE 14. Com 1 Open Circuit.
FIGURE 15. Isolated Voltage Measurement Channel with Output Filter.
OPA27GP
Logic
Control
6.8nF
±10V
OUT
+10V
IN
Out
ACom 2
DCom 2
+In
Sense 1
–In
Sense 2
Com 1
6.8nF
100k
100k
22k
22k
+V
CC
–3dB
= 200Hz
+V
DD
excite the measurement bridge and the INA102 is used to
amplify the bridge delta voltage. Connecting pins 4 and 7
together, and pins 5 and 6 together on the INA102 sets its
gain to 1000.
ISOLATED 4 TO 20MA RECEIVER
In Figure 17, the ISC300 converts a 4 to 20mA current to an
isolated 0 to 5V output. The 6.25
resistor converts the 4 to
20mA input to 0.025 to 0.125V. The 125
resistor in
conjunction with the 200
μ
A current source provides an
offset of –0.025V. Fine offset and gain adjustment gives an
accurate 0 to 0.1V input range.
Offset and Gain Adjustment
Adjust R
1
for 5V change on the output corresponding to
16mA change on the input.
Adjust R
2
with 4mA input for 0V output.
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PDF描述 |
|---|---|
| ISC302D | Optoelectronic |
| ISC302E | Optoelectronic |
| ISC302F | Optoelectronic |
| ISC363 | Optoelectronic |
| ISC363A | Optoelectronic |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ISC302D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Optoelectronic |
| ISC302E | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Optoelectronic |
| ISC302F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Optoelectronic |
| ISC3242AS1 | 制造商:ISAHAYA 制造商全稱:Isahaya Electronics Corporation 功能描述:FOR LOW FREQUENCY POWOR AMPLIFY APPLICATION SILICON NPN EPITAXIAL TYPE |
| ISC3244AS1 | 制造商:ISAHAYA 制造商全稱:Isahaya Electronics Corporation 功能描述:FOR LOW FREQUENCY POWOR AMPLIFY APPLICATION SILICON NPN EPITAXIAL TYPE |
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