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LTC1565-31 - 650kHz Continuous Time, Linear Phase Lowpass Filter

The LTC1565-31 is a 7th order, continuous time, linear phase lowpass filter. The selectivity of the LTC1565-31, combined with its linear phase and dynamic range, make it suitable for filtering in data communications or data acquisition systems. The filter attenuation is 36dB at 2× fCUTOFF and at least 72dB for frequencies above 3× fCUTOFF. Unlike comparable LC filters, the LTC1565-31 achieves this selectivity with a linear phase response in the passband.  With 5% accuracy of the cutoff frequency, the LTC1565-31 can be used in applications requiring pairs of matched filters, such as transceiver I and Q channels. Furthermore, the differential inputs and outputs provide a simple interface for these wireless systems. With a single 5V supply and a 2VP-P input, the LTC1565-31 features an impressive spurious free dynamic range of 75dB. The maximum signal-to-noise ratio is 78dB and it is achieved with a 2.5VP-P input signal. The LTC1565-31 features a shutdown mode where power supply current is typically less than 10μA. For W-CDMA, 3G, CDMA 2000 and other cellular and noncellular cutoff frequencies or single-ended I/O, please contact LTC Marketing for additional information.

Features 7th Order, 650kHz Linear Phase Filter in an SO-8 Differential Inputs and Outputs Operates on a Single 5V or a ±5V Supply Low Offset: 5mV Typical 75dB THD and SNR 78dB SNR Shutdown Mode Requires No External Components Requires No External Clock Signal Typical Application

Applications CDMA Basestations Data Communications Antialiasing Filters Smoothing or Reconstruction Filters Matched Filter Pairs Replacement for LC Filters Packaging