The AD630 can be considered as a precision op amp that integrates two independent differential input stages and a precision comparator that can be used to select the active front-end. The comparator's fast response time and the linear amplifier's high voltage slew rate and fast settling time minimize switching distortion.
The AD630 is used in precision signal processing and instrumentation applications that require a wide dynamic range. When used as a synchronous demodulator with a lock-amp configuration, the AD630 recovers a small signal from 100 dB of interference noise (see Lock-Amplifier Applications section). While the circuit is optimized for operating frequencies up to 1 kHz, it is also useful at frequencies up to several hundred kilohertz.
Other features of the AD630 include pin-programmable frequency compensation; Selectable input bias current compensation resistors, common-mode and differential offset voltage adjustments, and channel state outputs to indicate which of the two differential inputs is active.
Product features:
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AD630的应用灵活性使其非常适合要求精密固定增益、开关增益、多路复用、集成开关功能和高度精密放大的应用。
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AD630的100 dB动态范围超过任何混合或IC平衡调制器/解调器，可与昂贵的信号处理仪器的动态范围相当。
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AD630的运算放大器设计容易实现高增益或复杂的开关反馈功能。 应用电阻有利于实现最常见的应用，无需额外器件。
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AD630可用作增益为1、2、3或4的2通道多路复用器。10 kHz时100 dB的通道隔离接近采用空IC封装时可实现的限值。
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在大多数情况下，比较器的激光调整和放大通道偏移无需外部零点校准。
apply
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平衡调制和解调
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同步检波
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相位检测
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正交检波
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相敏检测
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锁定放大
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方波乘法