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參數(shù)資料
| 型號： | OP4177ARZ-REEL7 |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 13/24頁 |
| 文件大小： | 0K |
| 描述： | IC OPAMP GP 1.3MHZ QUAD 14SOIC |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 放大器類型： | 通用 |
| 電路數(shù)： | 4 |
| 轉(zhuǎn)換速率： | 0.7 V/µs |
| 增益帶寬積： | 1.3MHz |
| 電流 - 輸入偏壓： | 500pA |
| 電壓 - 輸入偏移： | 15µV |
| 電流 - 電源： | 400µA |
| 電流 - 輸出 / 通道： | 10mA |
| 電壓 - 電源，單路/雙路(±)： | 5 V ~ 36 V，±2.5 V ~ 18 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 14-SOIC |
| 包裝： | 帶卷 (TR) |
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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