DESCRIPTION
The LTC®1164-8 is a monolithic ultraselective, 8th order, elliptic bandpass filter. The passband of the LTC1164-8 is tuned with an external clock and the clock-to-center frequency ratio is 100:1. The –3dB pass bandwidth is typically 1% of the filter center frequency. The stopband attenuation of the LTC1164-8 is greater than 50dB. The lower and upper stopband frequencies are less than 0.96 • center frequency and greater than 1.04 • center frequency, respectively.

FEATURES
■ Ultraselectivity (50dB Attenuation at ±4% of Center Frequency)
■ Adjustable Passband Gain
■ Noise Independent of Gain
■ Filter Noise: 270μVRMS, VS = Single 5V Supply
■ Clock-Tunable (Center Frequency = fCLK/100)
■ Center Frequencies up to 5kHz, VS = ±5V (Typical ISUPPLY = 3.2mA)
■ Center Frequencies up to 4kHz, VS = Single 5V Supply (Typical ISUPPLY = 2.3mA)

APPLICATIOUS
■ Asynchronous Narrowband Signal Detectors
■ Low Frequency Asynchronous Demodulators
■ Handheld Spectrum Analyzers
■ In-Band Tone Signaling Detectors