LTC1569-6

Final Electrical Specifications LTC1569-6 Linear Phase, DC Accurate, Low Power, 10th Order Lowpass Filter September 1999 FEATURES s s s s s s s s s s s U APPLICATIO S s s One External R Sets Cutoff Frequency Root Raised Cosine Response 3mA Supply Current with a Single 3V Supply Up to 64kHz Cutoff on a Single 3V Supply 10th Order, Linear Phase Filter in an SO-8 DC Accurate, VOS(MAX) = 5mV Low Power Modes Differential or Single-Ended Inputs 80dB CMRR (DC) 82dB Signal-to-Noise Ratio, VS = 5V Operates from 3V to ±5V Supplies tems. Furthermore, its root raised cosine response offers the optimum pulse shaping for PAM data communications. The filter attenuation is 50dB at 1.5 fCUTOFF, 60db at 2 fCUTOFF, and in excess of 80dB at 6 fCUTOFF. DCaccuracy-sensitive applications benefit from the 5mV maximum DC offset. s Data Communication Filters for 3V Operation Linear Phase and Phase Matched Filters for I/Q Signal Processing Pin Programmable Cutoff Frequency Lowpass Filters DESCRIPTIO The LTC1569-6 sampled data filter does not require an external clock yet its cutoff frequency can be set with a single external resistor with a typical accuracy of 3.5% or better. The external resistor programs an internal oscillator whose frequency is divided by either 1, 4 or 16 prior to being applied to the filter network. Pin 5 determines the divider setting. Thus, up to three cutoff frequencies can be obtained for each external resistor value. Using various resistor values and divider se...