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

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)

Typical Application

LTC1164-8 Typical Application
LTC1164-8 Typical Application

Description

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.

Packaging

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

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards

Applications

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

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Design Tools

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

  • LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
  • LTpowerCAD - A complete power supply selection, synthesis and design tool
  • LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
  • PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
  • Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
  • LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
  • And More!

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