LTC1562

PRODUCTION

Very Low Noise, Low Distortion Active RC Quad Universal Filter

Data Sheet Product Selection Table
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Overview

  • Continuous Time—No Clock
  • Four 2nd Order Filter Sections, 10kHz to 150kHz Center Frequency
  • ±0.5% Typical Center Frequency Accuracy
  • ±0.3% Typical Center Frequency Accuracy (A Grade)
  • Wide Variety of Response Shapes
  • Lowpass, Bandpass and Highpass Responses
  • 103dB Typical S/N, ±5V Supply (Q = 1)
  • 97dB Typical S/N, Single 5V Supply (Q = 1)
  • 96dB Typical S/(N + THD) at ±5V Supply, 20kHz Input
  • Rail-to-Rail Input and Output Voltages
  • DC Accurate to 3mV (Typ)
  • “Zero-Power” Shutdown Mode
  • Single or Dual Supply, 5V to 10V Total
  • Resistor-Programmable fO, Q, Gain

The LTC1562 is a low noise, low distortion continuous-time filter with rail-to-rail inputs and outputs, optimized for a center frequency (fO) of 10kHz to 150kHz. Unlike most monolithic filters, no clock is needed. Four independent 2nd order filter blocks can be cascaded in any combination, such as one 8th order or two 4th order filters. Each block’s response is programmed with three external resistors for center frequency, Q and gain, using simple design formulas. Each 2nd order block provides lowpass and bandpass outputs. Highpass response is available if an external capacitor replaces one of the resistors. Allpass, notch and elliptic responses can also be realized.

The LTC1562 is designed for applications where dynamic range is important. For example, by cascading 2nd order sections in pairs, the user can configure the IC as a dual 4th order Butterworth lowpass filter with 94dB signal-to-noise ratio from a single 5V power supply. Low level signals can exploit the built-in gain capability of the LTC1562. Varying the gain of a section can achieve a dynamic range as high as 118dB with a ±5V supply.

Other cutoff frequency ranges can be provided upon request. Please contact LTC Marketing.

Applications

  • High Resolution Systems (14 Bits to 18 Bits)
  • Antialiasing/Reconstruction Filters
  • Data Communications, Equalizers
  • Dual or I-and-Q Channels (Two Matched 4th Order Filters in One Package)
  • Linear Phase Filtering
  • Replacing LC Filter Modules
LTC1562
Very Low Noise, Low Distortion Active RC Quad Universal Filter
Dual 4th Order 100kHz Butterworth Lowpass Filter Amplitude Response Product Package 1 Product Package 2
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Documentation

Data Sheet 1

User Guide 1

Application Note 1

Design Note 1

Technical Articles 6

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LTC1562
  • LTC1562-2
  • LTC1562A
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Latest Discussions

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