ADI AD4134 24位4路同步采样1.5 MSPS模数转换器(ADC)解决方案

ADI公司的AD4134 是24位4路低噪音同步采样精密模数转换器(ADC),提高警惕供功能性,高性能和容易使用.基于连续时间sigma-delta (CTSD)调制方案, AD4134移除了传统所需要的开关电容电路取样程序Σ-Δ调制器,导致放宽了ADC输入驱动要求.CTSD架构还在ADC混淆频段周围固有抑制信号,使器件具有固有的抗混淆功能,从而不需要复杂的外部的抗混淆滤波器. AD4134具有极好的DC和AC性能,每路ADC的带宽从DC到391.5kHz,使得器件非常适合用在通用精密数据采集解决方案,支持各种类性传感器,从温度和压力到振动与震动.器件具有108dB动态范围(ODR = 374 kSPS, FIR滤波器),137dB动态范围(ODR = 10 SPS, sinc3滤波器),1kHz输入音调的THD为−120 dB,失调误差飘移为0.9 μV/°C,增益飘移为2 ppm/°C,INL为FSR的±2 ppm,平均模式的动态范围增强为4:1和2:1.A加权动态范围为126dB.Sinc3滤波器具有50 Hz/60 Hz 抑制,串扰为130.7 dBFS,菊花链连接,工作电压为4.5 V到5.5 V 和1.65 V到1.95 V,外接基准源为4.096 V 或5 V, 1.8 V IOVDD电平.主要用在电测量和测试,音频测试,3相电源质量分析,声纳,闭环验证的控制和硬件,预测性维修的条件监视, 声学和材料科学研究和开发.本文介绍了AD4134主要特性,功能框图,典型连接框图, 典型应用框图以及评估板EVAL-AD4134FMCZ主要特性和电路图.

24-Bit, 4-Channel Simultaneous Sampling 1.5 MSPS Precision Alias Free ADC

The AD4134 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 AD4134 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.

The AD4134 has four independent converter channels in parallel, each with a CTSD modulator and a digital decimation and filtering path. The AD4134 enables simultaneous sampling of fou...