ADI LTC1069-6IS8#PBF

A monolithic low power, 8th order lowpass filter optimized for single 3V or single 5V supply operation. The cutoff frequency is clock tunable and equal to the clock frequency divided by 50. The input signal is sampled twice per clock cycle to lower the risk of aliasing. The typical passband ripple is ±0.1dB up to 0.9fCUTOFF. The gain at fCUTOFF is -0.7dB. The transition band features progressive attenuation reaching 42dB at 1.3fCUTOFF and 70dB at 2.1fCUTOFF. The maximum stopband attenuation is 72dB. It can be clock tuned for cutoff frequencies up to 20kHz (single 5V supply) and up to 14kHz (single 3V supply). The low power feature does not penalize the device's dynamic range. With single 5V supply and an input range of 0.4VRMS to 1.4VRMS, the Signal-to-(Noise + THD) ratio is ≥70dB. The wideband noise is 125μVRMS. Other filter responses with higher speed can be obtained. Available in an 8-pin SO package.

• 8th Order Elliptic Filter in SO-8 Package
• Single 3V Operation: Supply Current: 1mA (Typ); fCUTOFF: 14kHz (Max); S/N Ratio: 72dB
• Single 5V Operation: Supply Current: 1.2mA (Typ); fCUTOFF: 20kHz (Max); S/N Ratio: 79dB
• ±0.1dB Passband Ripple Up to 0.9fCUTOFF (Typ)
• 42dB Attenuation at 1.3fCUTOFF
• 66dB Attenuation at 2.0fCUTOFF
• 70dB Attenuation at 2.1fCUTOFF
• Wide Dynamic Range, 75dB or More (S / N + THD) Under Single 5V Operation
• Wideband Noise: 120uVRMS
• Clock-to-fCUTOFF Ratio: 50:1
• Internal Sample Rate: 100:1

• Handheld Instruments
• Telecommunication Filters
• Antialiasing Filters
• Smoothing Filters
• Audio
• Multimedia