LTC1569CS8-7#PBF

LTC1569-7 is a linear phase, DC accurate, tunable, 10th order low pass filter. This device is the first sampled data filter which does not require an external clock yet its cut-off 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 cut-off frequencies can be obtained for each external resistor value. Using various resistor values and divider settings, the cut-off frequency can be programmed over a range of seven octaves. Alternatively, the cut-off frequency can be set with an external clock and the clock-to-cut-off frequency ratio is 32:1. It is used in application such as data communication filters for 3V operation, linear phase and phase matched filters for I/Q signal processing, pin programmable cut-off frequency low pass filters etc.

• One external R sets cut-off frequency, root raised cosine response
• DC accurate, VOS(MAX) = 5mV
• Low power modes, differential or single-ended inputs
• Operates from 3V to ±5V supplies
• Upto 300KHz cut-off on a single 5V supply, upto 150KHz cut-off on a single 3V supply
• Total harmonic distortion is 74dB typical at (IN = 10KHz, 1.5VP-P)
• Wideband noise is 125µVRMS typical
• Power supply current is 6mA typical at (fCLK = 1.028MHz)
• Operating temperature is 0°C to 70°C
• Package style is 8-lead plastic narrow SO

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party