用于测量差分10位SAR ADC的输入范围驱动器

2018 IEEE 5th International Conference on Smart Instrumentation, Measurement and Application (ICSIMA) Pub Date : 2018-11-01 DOI:10.1109/ICSIMA.2018.8688760

S. I. Yusuf, Hasmayadi Majid, R. Musa, R. Sidek, I. Halin, S. Shafie

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引用次数: 1

摘要

在全差分逐次逼近(SAR)模数转换器(ADC)中，输入信号的不平衡和超量程会导致输入信号的不准确。因此，ADC驱动程序的实现可以解决这个问题，因为输入可以适当地调整以适应ADC输入。本设计选用AD8139单对差分放大器作为ADC驱动器，将其置于印刷电路板上，驱动SAR ADC的差分输入信号。结果表明，在直流和交流输入信号下，放大器的每个输出幅值保持相等，且相位差为180°。所制造的10位SAR ADC能够数字化由ADC驱动器产生的模拟输入的完整代码。

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Input Range Driver for Measurement of a Differential 10 bit SAR ADC

Imbalance and out-of-range input signals can cause inaccuracy in fully differential successive approximation (SAR) analog to digital converter (ADC). Therefore, implementation of an ADC driver can solve the problem since the input can be properly adjusted to suit with an ADC input. AD8139 single to differential amplifier was chosen as an ADC driver in this design and placed on a printed circuit board (PCB) to drive differential input signal of SAR ADC. The result shows each of output amplitude of the amplifier remains equal and is 180° out of phase for DC and AC input signal. The fabricated 10 bit SAR ADC is capable to digitize full code from analog input produced by the ADC driver.

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2018 IEEE 5th International Conference on Smart Instrumentation, Measurement and Application (ICSIMA)

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