© National Instruments Corporation 7 SCC-LP Series Lowpass Filter Modules User Guide
Input bias current................................... ±2 nA typ
±5 nA max1
Nonlinearity........................................... 0.004% of full scale
Filter Characteristics
Filter type...............................................Fourth-order Butterworth
lowpass
Rolloff rate............................................. 80 dB/decade
–3 dB cutoff frequency (fc)
SCC-LP01.......................................25 Hz
SCC-LP02.......................................50 Hz
SCC-LP03.......................................150 Hz
SCC-LP04.......................................1 kHz
Passband ripple
System Noise
Total harmonic distortion (THD) at fc... < –90 dB
Wide-band noise
(DC to 1 MHz, RTI)...............................100 µVrms
Narrow-band noise
(DC to 33 kHz, RTI).............................. 6 µVrms
1 Applicable at 25 °C.
Input Signal Typic al Maximum
DC to 1/3 fc ±0.04 dB 0 ± 0.1 dB
DC to 1/2 fc ±0.06 dB 0 ± 0.2 dB
DC to 2/3 fc –0.2 ± 0.25 dB –0.2 ± 0.4 dB
DC to fc –3 ± 0.3 dB –3 ± 0.5 dB