[原创] ADI AD7134 24位四路同时取样1．5 MSPS ADC解决方案

ADI公司的AD7134是 24位四路同时取样1.5 MSPS精密抗混叠抑制模数转换器(ADC),基于连续时间sigma-delta(CTSD)调制方案,不需要传统的开关电容电路取样的Σ-Δ调制器,从而放宽了ADC输入驱动的要求.CTSD架构还固有抑制了ADC混淆频带附近的信号,使得器件具有固有的抗混淆功能,从而省去了外接的复杂抗混淆滤波器.AD7134具有极好的AC和DC性能,ODR = 374 kSPS, FIR滤波器时的动态范围为108dB, ODR = 10 SPS, sinc3滤波器时的动态范围为137dB.THD为-120dB,失调误差漂移为0.7 μV/℃,增益漂移为2 ppm/℃,而INL为FSR的±2 ppm,电源电压为4.5V到5.5V和1.65V到1.95V.主要用在电子测试和测量,自动测试,3相电源质量分析,声呐,回路验证的控制和硬件,声学和材料科学研究和开发以及预见性维护的条件监测.中电网为您整理如下详细资料,本文介绍了AD7134主要特性,功能框图和连接框图,以及评估板EVAL-AD7134FMCZ主要特性,电路图,材料清单和PCB设计图.

The AD7134 is a quad channel, low noise, simultaneous sampling, precision analog-to-digital converter (ADC) that delivers on functionality, performance, and ease of use.

Based on the continuous time sigma-delta (CTSD) modulation scheme, the AD7134 removes the traditionally required switched capacitor circuitry sampling preceding the Σ-Δ modulator, which leads to a relaxation of the ADC input driving requirement. The CTSD architecture also inherently rejects signals around the ADC aliasing frequency band, giving the device its inherent antialiasing capability, and removes the need for a complex external antialiasing filter.
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