AD588
Attempts to drive a large capacitive load (in excess of 1000 pF)
can result in ringing or oscillation, as shown in the step response
photo (Figure 29). This is due to the additional pole formed by
the load capacitance and the output impedance of the amplifier,
which consumes phase margin.
V IN
V OUT
Figure 29. Output Amplifier Step Response, C L = 1 μF
10k ?
1μF
The recommended method of driving capacitive loads of this
magnitude is shown in Figure 30. The 150 Ω resistor isolates the
capacitive load from the output stage, while the 10 kΩ resistor
provides a dc feedback path and preserves the output accuracy.
The 1 μF capacitor provides a high frequency feedback loop.
The performance of this circuit is shown in Figure 31.
V IN
V OUT
Figure 31. Output Amplifier Step Response Using Figure 30 Compensation
+
V IN
150 ?
C L
1μF
V OUT
Figure 30. Compensation for Capacitive Loads
Rev. L | Page 14 of 20
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相关代理商/技术参数
AD588BD 制造商:未知厂家 制造商全称:未知厂家 功能描述:Voltage Reference
AD588BQ 功能描述:IC VREF SERIES PREC ADJ 16-CDIP RoHS:否 类别:集成电路 (IC) >> PMIC - 电压基准 系列:- 标准包装:2,000 系列:- 基准类型:旁路,可调节,精度 输出电压:1.24 V ~ 16 V 容差:±0.5% 温度系数:- 输入电压:1.24 V ~ 16 V 通道数:1 电流 - 阴极:100µA 电流 - 静态:- 电流 - 输出:20mA 工作温度:-40°C ~ 85°C 安装类型:通孔 封装/外壳:TO-226-3、TO-92-3(TO-226AA)成形引线 供应商设备封装:TO-92-3 包装:带卷 (TR)
AD588JQ 功能描述:IC VREF SERIES PREC ADJ 16-CDIP RoHS:否 类别:集成电路 (IC) >> PMIC - 电压基准 系列:- 标准包装:1,000 系列:- 基准类型:旁路,可调节,精度 输出电压:2.495 V ~ 36 V 容差:±0.5% 温度系数:标准值 34ppm/°C 输入电压:2.495 V ~ 36 V 通道数:1 电流 - 阴极:1mA 电流 - 静态:- 电流 - 输出:100mA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:TO-243AA 供应商设备封装:SOT-89-3 包装:带卷 (TR)
AD588KQ 功能描述:IC VREF SERIES PREC ADJ 16-CDIP RoHS:否 类别:集成电路 (IC) >> PMIC - 电压基准 系列:- 标准包装:2,000 系列:- 基准类型:旁路,可调节,精度 输出电压:1.24 V ~ 16 V 容差:±0.5% 温度系数:- 输入电压:1.24 V ~ 16 V 通道数:1 电流 - 阴极:100µA 电流 - 静态:- 电流 - 输出:20mA 工作温度:-40°C ~ 85°C 安装类型:通孔 封装/外壳:TO-226-3、TO-92-3(TO-226AA)成形引线 供应商设备封装:TO-92-3 包装:带卷 (TR)
AD588SD 制造商:未知厂家 制造商全称:未知厂家 功能描述:Voltage Reference
AD588SD/883B 制造商:未知厂家 制造商全称:未知厂家 功能描述:Voltage Reference
AD588SE 制造商:Rochester Electronics LLC 功能描述:- Bulk
AD588SE/883B 制造商:Analog Devices 功能描述:V-Ref Programmable ±5V/±10V 20-Pin LCC Tube