参数资料
| 型号： | OP297GSZ-REEL7 |
| 厂商： | Analog Devices Inc |
| 文件页数： | 3/16页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP GP 500KHZ DUAL 8SOIC |
| 标准包装： | 1,000 |
| 放大器类型： | 通用 |
| 电路数： | 2 |
| 转换速率： | 0.15 V/µs |
| 增益带宽积： | 500kHz |
| 电流 - 输入偏压： | 50pA |
| 电压 - 输入偏移： | 80µV |
| 电流 - 电源： | 525µA |
| 电压 - 电源，单路/双路(±)： | 4 V ~ 40 V，±2 V ~ 20 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-SO |
| 包装： | 带卷 (TR) |
OP297
Rev. G | Page 11 of 16
APPLICATION CIRCUITS
PRECISION ABSOLUTE VALUE AMPLIFIER
The circuit in Figure 31 is a precision absolute value amplifier
with an input impedance of 30 MΩ. The high gain and low
TCVOS of the OP297 ensure accurate operation with microvolt
input signals. In this circuit, the input always appears as a
common-mode signal to the op amps. The CMR of the OP297
exceeds 120 dB, yielding an error of less than 2 ppm.
+15V
–15V
5
6
7
1
3
4
–
+
1/2
OP297
–
+
1/2
OP297
2
8
R1
1k
R3
1k
D1
1N4148
D2
1N4148
R2
2k
0V < VOUT < 10V
C1
30pF
C2
0.1F
C3
0.1F
VIN
00300-
031
Figure 31. Precision Absolute Value Amplifier
PRECISION CURRENT PUMP
Maximum output current of the precision current pump shown
in Figure 32 is ±10 mA. Voltage compliance is ±10 V with
±15 V supplies. Output impedance of the current transmitter
exceeds 3 MΩ with linearity better than 16 bits. R1 through R4
should be matched resistors.
+15V
5
6
7
1
2
8
3
–15V
–
+
1/2
OP297
–
+
1/2
OP297
R1
10k
R2
10k
VIN
R3
10k
R4
10k
R5
100k
IOUT
10mA MAX
IOUT =
=
= 10mA/V
VIN
R5
VIN
100
00
30
0-
0
32
Figure 32. Precision Current Pump
PRECISION POSITIVE PEAK DETECTOR
polyethylene to minimize dielectric absorption and leakage.
The droop rate is determined by the size of CH and the bias
current of the OP297.
2N930
+15V
1N4148
RESET
VIN
5
6
7
1
3
–15V
–
+
1/2
OP297
–
+
1/2
OP297
2
1k
CH
0.1F
VOUT
00
300-
033
Figure 33. Precision Positive Peak Detector
SIMPLE BRIDGE CONDITIONING AMPLIFIER
Figure 34 shows a simple bridge conditioning amplifier using
the OP297. The transfer function is
R
V
F
REF
OUT
Δ
+
Δ
=
The REF43 provides an accurate and stable reference voltage for
the bridge. To maintain the highest circuit accuracy, RF should
be 0.1% or better with a low temperature coefficient.
15V
3
2
1
5
6
7
4
8
REF43
4
–
+
1/2
OP297
–
+
1/2
OP297
VREF
RF
R + ΔR
VOUT
VOUT = VREF
ΔR
R + ΔR
RF
R
00
30
0-
0
34
Figure 34. Simple Bridge Condition Amplifier Using the OP297
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相关代理商/技术参数 |
参数描述 |
|---|---|
| OP297S | 制造商:AD 制造商全称:Analog Devices 功能描述:Dual Low Bias Current Precision Operational Amplifier |
| OP298 | 制造商:OPTEK 制造商全称:OPTEK 功能描述:GaAlAs Plastic Infrared Emitting Diodes |
| OP298A | 功能描述:红外发射源 High Intensity 890nm RoHS:否 制造商:Fairchild Semiconductor 波长:880 nm 射束角:+/- 25 辐射强度: 最大工作温度:+ 100 C 最小工作温度:- 40 C 封装 / 箱体:Side Looker 封装:Bulk |
| OP298AA | 功能描述:红外发射源 Infrared 875nm RoHS:否 制造商:Fairchild Semiconductor 波长:880 nm 射束角:+/- 25 辐射强度: 最大工作温度:+ 100 C 最小工作温度:- 40 C 封装 / 箱体:Side Looker 封装:Bulk |
| OP298AB | 功能描述:红外发射源 Infrared 875nm RoHS:否 制造商:Fairchild Semiconductor 波长:880 nm 射束角:+/- 25 辐射强度: 最大工作温度:+ 100 C 最小工作温度:- 40 C 封装 / 箱体:Side Looker 封装:Bulk |
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