DELAY (s) LTC1565-31 650kHz Continuous Time, Linear Phase Lowpass Filter FEATURES DESCRIPTION n 7th Order, 650kHz Linear Phase Filter in an SO-8 The LTC 1565-31 is a 7th order, continuous time, linear n Differential Inputs and Outputs phase lowpass lter. The selectivity of the LTC1565-31, n Operates on a Single 5V or a 5V Supply combined with its linear phase and dynamic range, make n Low Offset: 5mV Typical it suitable for ltering in data communications or data n 75dB THD and SNR acquisition systems. The lter attenuation is 36dB at n 78dB SNR 2 f and at least 72dB for frequencies above 3 CUTOFF n Shutdown Mode f . Unlike comparable LC lters, the LTC1565-31 CUTOFF n Requires No External Components achieves this selectivity with a linear phase response in n Requires No External Clock Signal the passband. With 5% accuracy of the cutoff frequency, the LTC1565-31 can be used in applications requiring pairs of matched APPLICATIONS lters, such as transceiver I and Q channels. Furthermore, the differential inputs and outputs provide a simple inter- n CDMA Basestations face for these wireless systems. n Data Communications n With a single 5V supply and a 2V input, the LTC1565-31 Antialiasing Filters P-P n features an impressive spurious free dynamic range of Smoothing or Reconstruction Filters 75dB. The maximum signal-to-noise ratio is 78dB and it n Matched Filter Pairs is achieved with a 2.5V input signal. n Replacement for LC Filters P-P The LTC1565-31 features a shutdown mode where power supply current is typically less than 10A. 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. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Frequency Response 10 2.0 Single 5V Supply, Differential 650kHz Lowpass Filter GAIN 0 1.9 10 1.8 1 8 + + V +IN +OUT V IN OUT 20 1.7 2 7 V IN OUT V IN OUT 30 1.6 LTC1565-31 40 1.5 5V DELAY 5V 3 6 0.1F 50 1.4 + GND V 0.1F 60 1.3 4 5 V SHDN 70 1.2 80 1.1 15645-31 TA01 90 1.0 100 0.9 4 5 6 7 10 10 10 10 FREQUENCY (Hz) 1565 G01 156531fa 1 GAIN (dB)LTC1565-31 ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) Total Supply Voltage ............................................... 11V TOP VIEW Power Dissipation .............................................. 500mW +IN 1 8 +OUT Operating Temperature Range IN 2 7 OUT LTC1565-31CS8 ...................................... 0C to 70C + GND 3 6 V LTC1565-31IS8 ................................... 40C to 85C V 4 5 SHDN Storage Temperature Range ................. 65C to 150C S8 PACKAGE Lead Temperature (Soldering, 10 sec) ................ 300C 8-LEAD PLASTIC SO T = 150C, = 80C/ W (NOTE 4) JMAX JA ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LTC1565-31CS8 PBF LTC1565-31CS8 TRPBF 156531 8-Lead Plastic SO 0C to 70C LTC1565-31IS8 PBF LTC1565-31IS8 TRPBF 56531I 8-Lead Plastic SO 40C to 85C Consult LTC Marketing for parts speci ed with wider operating temperature ranges. Consult LTC Marketing for information on non-standard lead based nish parts. For more information on lead free part marking, go to: