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Low Pass, Continuous Time Filter Module with Programmable Cut-off Frequency and Gain:

This module can act as either an antialiasing or reconstruction filter for our SCF module and as a general purpose continuous time antialiasing or low pass filter. By rotating a 16-position switch, the user can select a cut-off frequency between 10kHz to 150kHz, in 10kHz steps. A second 16-position switch allows the user to adjust the gain of the the filter between 1 and 16, in 1v/v steps.

No other components are required to implement a programmable filter with one of these modules.

Features

Single, 8th Order Elliptic Type Lowpass Filter with user selectable gain and cutoff frequency.
- Fcutoff adjustable from 0kHz to 150kHz in 10kHz Steps
  
  (0kHz position puts filter into a low-power “off” with It’s output going high impedance).
Filter has a switch selectable gain (G) facility
- G = 1 to 16 in 1v/v steps
2.7v to 10v Operation (Single or Split Supplies)
Rail-to-Rail Input and Output Range
Operating Temperature range 0 to 70°C
Compatible with 0.1" grid breadboards.

Low Pass, Continuous Time Filter Module with Programmable Cut-off Frequency and Gain

Applications

Anti-aliasing or reconstruction filter for a switched capacitor filter (SCF) such as the Tirna Electronics SCF module.
Anti-aliasing filtering prior to analogue-to-digital converter (ADC) or reconstruction filtering following a digital-to-analogue converter (DAC) or Pulse Width Modulator (PWM) output.
Baseband signal band-limiting prior to up-conversion or signal conditioning following down conversion in a communications system. The latter application may require a passive “roofing” filter before this module to shield it from high frequency product terms beyond the capability of this active filter module.

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Price: £40.00 per module