ABB DI821 3BSE008550R1模块励磁控制器

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 lOPA858的低输入电压噪声和高转换速率使该器件成为可行的宽带、高输入阻抗电压放大器。图59.增益为-2V/V（无噪声增益整形）的OPA858图60.增益为-2 V/V（带噪声增益整形的）的OPA 858 10.2.1设计要求设计具有表1所列设计要求的高带宽、高增益、电压放大器。此处选择了反相放大器配置；然而，该理论也适用于非反转配置。在反相配置中，与非反相配置不同，信号增益和噪声增益传递函数不相等。表1.设计要求目标带宽（MHz）信号增益（V/V）反馈电阻（Ω）频率峰值（dB）>750–2 453<2 10.2.2详细设计程序OPA858在增益为7 V/V的情况下被补偿为峰值小于1 dB。在较低增益下使用该器件会导致峰值增大和潜在的不稳定性。图59显示了信号增益为-2 V/V时配置的OPA858。放大器的直流噪声增益（1/β）受62Ω终端电阻器和50Ω源电阻器的影响，并由公式1给出。在较高频率下，噪声增益受电抗元件（如电感器和电容器）的影响。这些包括分立板组件以及印刷电路板（PCB）寄生。（1） 频率（Hz）标准化增益（0M 1G D207模拟响应测量响应F F 1 F 2 R C S F G IN 1 F 2 R|| R C S 23 OPA858 www.ti.com SBOS629A–2018年4月–2018年7月修订产品ow input voltage noise and high slew rate of the OPA858 makes the device a viable wideband, high input impedance voltage amplifier. Figure 59. OPA858 in a Gain of –2V/V (No Noise Gain Shaping) Figure 60. OPA858 in a Gain of –2V/V (With Noise Gain Shaping) 10.2.1 Design Requirements Design a high-bandwidth, high-gain, voltage amplifier with the design requirements listed in Table 1. An inverting amplifier configuration is chosen here; however, the theory is applicable to a noninverting configuration as well. In an inverting configuration the signal gain and noise gain transfer functions are not equal, unlike the noninverting configuration. Table 1. Design Requirements TARGET BANDWIDTH (MHz) SIGNAL GAIN (V/V) FEEDBACK RESISTANCE (Ω) FREQUENCY PEAKING (dB) > 750 –2 453 < 2 10.2.2 Detailed Design Procedure The OPA858 is compensated to have less than 1 dB of peaking in a gain of 7 V/V. Using the device in lower gains results in increased peaking and potential instability. Figure 59 shows the OPA858 configured in a signal gain of –2 V/V. The DC noise gain (1/β) of the amplifier is affected by the 62-Ω termination resistor and the 50-Ω source resistor and is given by Equation 1. At higher frequencies the noise gain is affected by reactive elements such as inductors and capacitors. These include both discrete board components as well as printed circuit board (PCB) parasitics. (1) Frequency (Hz) Normalized Gain ( 0M 1G D207 Simulated Response Measured Response F F 1 f 2 R C S    F G IN 1 f 2 R || R C S 23 OPA858 www.ti.com SBOS629A –APRIL 2018–REVISED JULY 2018 Produ

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必须从事安装，组装或维护设备等相关工控电气机械以及其他相关技术的人员。

Must be engaged in the installation,assembly or maintenance of equipment and other related industriacontroeectrica machinery and other related technica personne.应用范围:

应用于品牌本系列工业以及生产生活自动化设备产品。

Used in the brand of this series of industriaand production automation eauipment products

适用于场景:系统集成，非标定制，产线升级改造，原设备电气替换等等。

Suitable for scenarios:system integration,non-standard customizationproduction line upgrading and transformation,electrical replacement of original equipment,etc.

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适用水泥，木业，石业，橡胶，石油，化工，发电，环保，水处理，制冷，交通，钢铁，食品，饮料，船舶，制冷等行业

Applicable to cementwood,stone,rubber,petroleumchemical, power generation,