参数资料
型号: OP2177AR
厂商: Analog Devices Inc
文件页数: 13/24页
文件大小: 0K
描述: IC OPAMP GP 1.3MHZ DUAL LN 8SOIC
产品变化通告: Product Discontinuance 27/Oct/2011
设计资源: 16-Bit Fully Isolated Voltage Output Module Using AD5662, ADuM1401, and External Amplifiers (CN0063)
标准包装: 98
放大器类型: 通用
电路数: 2
转换速率: 0.7 V/µs
增益带宽积: 1.3MHz
电流 - 输入偏压: 500pA
电压 - 输入偏移: 15µV
电流 - 电源: 400µA
电流 - 输出 / 通道: 10mA
电压 - 电源,单路/双路(±): 5 V ~ 36 V,±2.5 V ~ 18 V
工作温度: -40°C ~ 125°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-SO
包装: 管件
OP1177/OP2177/OP4177
Rev. G | Page 20 of 24
0
26
27
-0
65
200
500
4.37k
100
20
4.12k
5k
49.9k
ADR421
+15V
0.1F
V+
100
RTD
1/2
OP2177
7
6
5
1/2
OP2177
1
8
2
3
4
V–
VOUT
where δ = ΔR/R is the fractional deviation of the RTD resistance
with respect to the bridge resistance due to the change in temper-
ature at the RTD.
For δ << 1, the preceding expression becomes
δ
+
+
=
+
δ
REF
O
V
R2
R1
R2
R1
R
R2
R1
R
R1
V
R
R2
V
1
With VREF constant, the output voltage is linearly proportional
to δ with a gain factor of
+
+
R2
R1
R2
R1
R
R2
V
REF
1
0
2627
-0
66
R
R(1+δ)
ADR421
15V
0.1F
OP1177
6
7
4
2
3
V+
V–
RF
VOUT
Figure 65. Low Power Linearized RTD Circuit
SINGLE OPERATIONAL AMPLIFIER BRIDGE
The low input offset voltage drift of the OP1177 makes it very
effective for bridge amplifier circuits used in RTD signal condi-
tioning. It is often more economical to use a single bridge
operational amplifier as opposed to an instrumentation amplifier.
In the circuit shown in Figure 66, the output voltage at the
operational amplifier is
Figure 66. Single Bridge Amplifier
()
δ
+
+
+
δ
=
1
R2
R1
R
R1
V
R
R2
V
REF
O
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