参数资料
型号: ISL55002IBZ-T13
厂商: Intersil
文件页数: 2/12页
文件大小: 0K
描述: IC OPAMP DUAL 200MHZ 8-SOIC
产品培训模块: Solutions for Industrial Control Applications
标准包装: 2,500
放大器类型: 电压反馈
电路数: 2
转换速率: 300 V/µs
增益带宽积: 70MHz
-3db带宽: 200MHz
电流 - 输入偏压: 600nA
电压 - 输入偏移: 1200µV
电流 - 电源: 8.5mA
电流 - 输出 / 通道: 140mA
电压 - 电源,单路/双路(±): 4.5 V ~ 30 V,±2.25 V ~ 15 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOIC
包装: 带卷 (TR)
10
FN7497.4
July 27, 2006
Differential Output Instrumentation Amplifier
The addition of a third amplifier to the conventional three
amplifier instrumentation amplifier introduces the benefits of
differential signal realization, specifically the advantage of
using common-mode rejection to remove coupled noise and
ground potential errors inherent in remote transmission. This
configuration also provides enhanced bandwidth, wider
output swing and faster slew rate than conventional three
amplifier solutions with only the cost of an additional
amplifier and few resistors.
Strain Gauge
The strain gauge is an ideal application to take advantage of
the moderate bandwidth and high accuracy of the ISL55002.
The operation of the circuit is very straightforward. As the
strain variable component resistor in the balanced bridge is
subjected to increasing strain, its resistance changes,
resulting in an imbalance in the bridge. A voltage variation
from the referenced high accuracy source is generated and
translated to the difference amplifier through the buffer
stage. This voltage difference as a function of the strain is
converted into an output voltage.
FIGURE 29. SALLEN-KEY HIGH PASS FILTER
K
4
2
Q
RC
2
wo
K
4
K
Holp
C
R
C
R
C
R
C
R
C
R
C
R
)
K
1
(
1
Q
C
R
C
R
1
wo
K
Holp
1
2
1
2
1
2
1
2
1
=
=
+
=
Equations simplify if we let
all components be equal R=C
+
-
V+
V-
V2
5V
C5
1nF
VOUT
R7
1k
V3
5V
R1
1k
R2
1k
C2
1nF
V1
C1
1nF
C5
1nF
RA
1k
RB
1k
+
-
+
-
+
-
eo
eo4
eo3
REF
R3
R2
RG
A2
e2
A4
A3
R3
A1
e1
+
-
FIGURE 30. DIFFERENTIAL OUTPUT AMPLIFIER
e
o3
12R
2 RG
+
() e
1
e
2
()
=
e
o4
12R
2 RG
+
() e
1
e
2
()
=
e
o
21
2R
2 RG
+
() e
1
e
2
()
=
BW
2f
C1 2
,
A
Di
------------------
=
A
Di
21
2R
2 RG
+
()
=
ISL55002
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