LPF-30 Low-Pass Filter


Upper frequency band limit can be smoothly varied between 100 Hz and 30 kHz using a single knob. WPI’s new low-pass filter is small, consumes little power, and can be located almost anywhere in your workspace. Features switch-selectable gain of ×1 or ×10 and low noise. An ideal tool for filtering an analog signal before digital conversion by data acquisition systems.

Input Impedance 1 MΩ
Gain x1, x10
Bandwidth filter 100 Hz to 30 kHz (2 pole R/C)
Sharpness 40 dB/decade
Equivalent shorted input noise at x10 gain: 100 Hz Bandwidth 10 µVpp
Equivalent shorted input noise at x10 gain: 30 kHz Bandwidth 30 µVpp
Output voltage range ±8 V
Max. input voltage ±10 V
Output resistance 100 Ω
Low battery indicator LED lights when approximately 60 hours of battery life remain.
Power 2 nine-volt alkaline batteries, supplied
Battery life About 400 hours
Dimension 5 x 3 x 2 inches (13 x 8 x 5 cm)
Shipping weight 2 lb (0.9 kg)