Chapter 474

Tiny 1MHz lowpass filter uses no inductors

Nello Sevastopoulos


The LTC1560-1, a tiny 1MHz lowpass filter that uses no inductors, is described.


Continuous-time filter


The LTC1560-1 is a fully integrated continuous-time filter in an SO-8 package. It provides a 5-pole elliptic response with a pin-selectable cutoff frequency (fC) of 1MHz or 500kHz. Several features distinguish the LTC1560-1 from other commercially available high frequency, continuous-time monolithic filters:

• 5-pole 0.5MHz/1MHz elliptic in an SO-8 package

• 70dB signal-to-noise ratio (SNR) measured at 0.07% THD

• 75dB signal-to-noise ratio (SNR) measured at 0.5% THD

• 60dB or more stopband attenuation

• No external components required ...

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