LTC1164-8 - Ultraselective, Low Power 8th Order Elliptic Bandpass Filter with Adjustable Gain


  • 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)

Typical Application

LTC1164-8 Typical Application
LTC1164-8 Typical Application


The LTC1164-8 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.

The LTC1164-8 requires an external op amp and two external resistors (see the circuit below). The filter’s gain at center frequency is set by the ratio RIN/RF. For a gain equal to one and an optimum dynamic range, RF should be set to 61.9k and RIN should be 340k. For gains other than one, RIN = 340k/Gain. Gains up to 1000 are obtainable. Setting the filter’s gain with input resistor RIN does not increase the filter’s wideband noise. The 270μVRMS wideband noise of the LTC1164-8 is independent of the filter’s center frequency.

The LTC1164-8 is available in a 14-pin PDIP or a 16-pin surface mount SO Wide package.


For complete and up to date package information and drawings, please refer to our packaging page

LTC1164-8 Package Drawing
LTC1164-8 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

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