Other Parts Discussed in Thread: PGA281 , ADS1271 我PGA281放大1倍的情况下短路输入(14、15脚),输出(8、9脚)输出0.002V。在放大128倍时输出1.28V,其中9脚3.177V,8脚1.744.且不稳定。EF始终为低电平。如图已将R5,R17去除。
关于滤波器, 手册有介绍
FREQUENCY RESPONSE
The digital filter sets the overall frequency response. within the signal passband. The filter uses a multi-stage FIR topology to provide linear phase with minimal passband ripple and high stop band attenuation. The filter…