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参数资料
| 型号： | AD8698ARM-R2 |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | 运动控制电子 |
| 英文描述： | Dual Precision, Rail-to-Rail Output Operational Amplifier |
| 中文描述： | DUAL OP-AMP, 300 uV OFFSET-MAX, 1 MHz BAND WIDTH, PDSO8 |
| 封装： | MO-187AA, MSOP-8 |
| 文件页数： | 15/20页 |
| 文件大小： | 317K |
| 代理商： | AD8698ARM-R2 |
AD8698
Rev. 0 | Page 15 of 20
U
1k
10k
100k
1M
10M
LOAD CAPACITANCE (nF)
1
10
100
0
Figure 52. Unity Gain Bandwidth vs. Load Capacitance
Figure 52 shows the unity gain bandwidth as a function of load
capacitance.
INSTRUMENTATION AMPLIFIER
Instrumentation amplifiers are used in applications requiring
precision, accuracy, and high CMRR. One popular application
is signal conditioning in process control, test automation, and
measurement instrumentation, where the amplifier is used to
amplify small signals.
The triple op amp implementation uses the AD8698 at the
front end with the OP184 for optimum accuracy.
The circuit in Figure 53
enjoys a high overall gain, excellent dc
performance, high CMRR, as well as the benefit of an output
that swings to the supplies.
The CMRR of the in-amp will be limited by the choice of
resistor tolerance. R5 is an optional potentiometer that can be
used to calibrate the circuit for maximum gain. R7 can be
trimmed for optimum CMRR.
The output voltage is given by:
1
=
1
R
2
R
4
R
3
R
V
V
IN
O
2
V–
V+
V+
R3
9k
R1
1k
R2
10k
R1
9.8k
R7
400
R4
2k
R5
10k
R3
9k
V–
V2
V1
0
V–
V+
OP184
1/2 AD8698
1/2 AD8698
Figure 53. Three Op Amp In-Amp
COMPOSITE AMPLIFIER
The dc accuracy of the AD8698 and the ac performance of the
OP184 are combined in the circuit shown in Figure 54. The
composite amplifier provides a higher bandwidth, a lower offset
voltage, and a higher loop, thereby reducing the gain error
substantially.
The circuit shown exhibits a total output rms noise of less than
500 μV, corresponding to less than 3 mV of peak-to-peak noise
over approximately a 3 MHz bandwidth. Cf is used to minimize
peaking.
The circuit has an inverting gain of 10. In applications with
higher closed-loop gains, Cf is necessary to maintain a
sufficient phase margin and ensure stability. This results in a
narrower closed-loop bandwidth.
V+
OP184
1/2 AD8698
V–
V+
V–
0
R2
10k
R1
1k
Cf
20pF
V
IN
Figure 54. Composite Amplifier Circuit
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PDF描述 |
|---|---|
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| AD871JE | Complete 12-Bit 5 MSPS Monolithic A/D Converter |
| AD871SD | Complete 12-Bit 5 MSPS Monolithic A/D Converter |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD8698ARM-REEL | 制造商:Analog Devices 功能描述:OP Amp Dual GP R-R O/P ±15V 8-Pin MSOP T/R |
| AD8698ARMZ-R2 | 制造商:Analog Devices 功能描述:OP Amp Dual GP R-R O/P ±15V 8-Pin MSOP T/R 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Analog Devices 功能描述:OP AMP DUAL PRECISION RRO/P 8698 |
| AD8698ARMZ-REEL | 功能描述:IC OPAMP GP R-R 1MHZ DUAL 8MSOP RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1,000 系列:- 放大器类型:电压反馈 电路数:4 输出类型:满摆幅 转换速率:33 V/µs 增益带宽积:20MHz -3db带宽:30MHz 电流 - 输入偏压:2nA 电压 - 输入偏移:3000µV 电流 - 电源:2.5mA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOIC 包装:带卷 (TR) |
| AD8698ARZ | 功能描述:IC OPAMP GP R-R 1MHZ DUAL 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:- 放大器类型:通用 电路数:1 输出类型:满摆幅 转换速率:0.11 V/µs 增益带宽积:350kHz -3db带宽:- 电流 - 输入偏压:4nA 电压 - 输入偏移:20µV 电流 - 电源:260µA 电流 - 输出 / 通道:20mA 电压 - 电源，单路/双路(±):2.7 V ~ 36 V，±1.35 V ~ 18 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) |
| AD8698ARZ-REEL | 功能描述:IC OPAMP GP R-R 1MHZ DUAL 8SOIC RoHS:是 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:- 放大器类型:通用 电路数:1 输出类型:满摆幅 转换速率:0.11 V/µs 增益带宽积:350kHz -3db带宽:- 电流 - 输入偏压:4nA 电压 - 输入偏移:20µV 电流 - 电源:260µA 电流 - 输出 / 通道:20mA 电压 - 电源，单路/双路(±):2.7 V ~ 36 V，±1.35 V ~ 18 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) |
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