LTC1565-31

FEATURES n 7th Order, 650kHz Linear Phase Filter in an SO-8 n Differential Inputs and Outputs n Operates on a Single 5V or a ±5V Supply n Low Offset: 5mV Typical n 75dB THD and SNR n 78dB SNR n Shutdown Mode n Requires No External Components n Requires No External Clock Signal APPLICATIONS n CDMA Basestations n Data Communications n Antialiasing Filters n Smoothing or Reconstruction Filters n Matched Filter Pairs n Replacement for LC Filters TYPICAL APPLICATION Single 5V Supply, Differential 650kHz Lowpass Filter VIN+ VIN– 0.1μF 1 +IN 2 –IN +OUT 8 7 –OUT LTC1565-31 3 GND V+ 6 4 V– SHDN 5 VOUT+ VOUT– 5V 5V 0.1μF 15645-31 TA01 LTC1565-31 650kHz Continuous Time, Linear Phase Lowpass Filter DESCRIPTION The LTC®1565-31 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 fe...