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參數(shù)資料
| 型號(hào)： | 363D |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 測量放大器 |
| 英文描述： | LM363 Precision Instrumentation Amplifier |
| 中文描述： | INSTRUMENTATION AMPLIFIER, 3000 uV OFFSET-MAX, CDIP16 |
| 封裝： | HERMETIC SEALED, DIP-16 |
| 文件頁數(shù)： | 15/22頁 |
| 文件大?。?/td> | 452K |
| 代理商： | 363D |
Typical Applications
4 mA-20 mA Two Wire Current Transmitter
TL/H/5609–20
The LM329 reference provides excellent line regulation and gain stability. When bridge is balanced
(I
OUT
e
4 mA), there’s no drop across R3 and R4, so that gain and offset adjustments are non-in-
teractive. The LM334 configured as a zero-TC current source supplies quiescent current to circuit.
R11 provides current limiting.
Design Equations
I
OS
e
(I
R6
a
I
R7
)
1
a
R2
R1
e
4 mA
Gain
e
D
I
OUT
D
V
IN
j
A
V
R1XR2
a
R3
a
R4
R3
a
R4
j
10 mA
mV
when A
V
e
LM363 voltage gain
Pick I
334
e
0.68V
R9
a
68 mV
R10
j
3.8 mA
I
MAX
e
I
334
a
V
Z
b
2.4V
R11
e
26 mA
I
BRIDGE(MAX)
j
I
334
-I
363
-I
Z
j
1.5mA
Precision Current Source (Low Output Current)
TL/H/5609–21
R1
e
R2
I
OUT
e
IN
V
l
V
IN
l
s
10V
Precision Voltage to Current Converter (Low Input Voltage)
TL/H/5609–22
R1
e
R2
Req
e
R1
ll
50 k
X
I
OUT
e
G V
IN
Req
e
G V
IN
1 k
X
15
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