LTC1164-6

The LTC1164-6 is a monolithic 8th order elliptic lowpass filter featuring clock-tunable cutoff frequency and low power supply current. Low power operation is achieved without compromising noise or distortion performance. At ±5V supplies the LTC1164-6 uses only 4mA supply current while keeping wideband noise below 110mVRMS. With a single 5V supply, the LTC1164-6 can provide up to 10kHz cutoff frequency and 80dB signal-to-noise ratio while consuming only 2.5mA.

The device provides an elliptic lowpass rolloff with stopband attenuation of 64dB at 1.44 fCUTOFF and an fCLKto- f_CUTOFF ratio of 100:1 (pin 10 to V). For a ratio of 100:1, f_CUTOFF can be clock-tuned up to 10kHz. For a fCLK-tofCUTOFF ratio of 50:1 (pin 10 to V +), the LTC1164-6 provides an elliptic lowpass filter with fCUTOFF frequencies up to 20kHz. When pin 10 is connected to ground, the device approximates an 8th order linear phase response with 65dB attenuation at 4.5 f 3dB and fCLK/ f 3dB ratio of 160:1. The LTC1164-6 is pin compatible with the LTC1064-1.