LTC1562 - Very Low Noise, Low Distortion Active RC Quad Universal Filter

Features

  • 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

Typical Application

LTC1562 Typical Application
LTC1562 Typical Application

Description

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.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

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

Part Number Package Code Temp Package
Drawing
RoHS
LTC1562ACG#PBF SSOP-20 G C 05-08-1640 (G20) Yes
LTC1562ACG#TRPBF SSOP-20 G C 05-08-1640 (G20) Yes
LTC1562AIG#PBF SSOP-20 G I 05-08-1640 (G20) Yes
LTC1562AIG#TRPBF SSOP-20 G I 05-08-1640 (G20) Yes
LTC1562CG#PBF SSOP-20 G C 05-08-1640 (G20) Yes
LTC1562CG#TRPBF SSOP-20 G C 05-08-1640 (G20) Yes
LTC1562CN#PBF N-16 N C 05-08-1510 (N16) Yes
LTC1562IG#PBF SSOP-20 G I 05-08-1640 (G20) Yes
LTC1562IG#TRPBF SSOP-20 G I 05-08-1640 (G20) Yes


LTC1562 Package Drawing
LTC1562 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

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC1562ACG#PBF SSOP-20 C $13.90 $11.75 Yes
LTC1562ACG#TRPBF SSOP-20 C $11.85 Yes
LTC1562AIG#PBF SSOP-20 I $15.30 $12.95 Yes
LTC1562AIG#TRPBF SSOP-20 I $13.05 Yes
LTC1562CG#PBF SSOP-20 C $10.20 $8.95 Yes
LTC1562CG#TRPBF SSOP-20 C $9.05 Yes
LTC1562CN#PBF N-16 C $10.35 $8.95 Yes
LTC1562IG#PBF SSOP-20 I $11.75 $10.30 Yes
LTC1562IG#TRPBF SSOP-20 I $10.40 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

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.

Part Number Description Price Documentation
DC266B-B LTC1562CG-2 | Very-Low-Noise, Low Distortion Quad Universal Filter $150.00
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Click here to view our complete list of demo boards

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

Product Notifications

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

Models for the following parts are available in LTspice:
LTC1562
LTC1562-2
LTC1562A

Technical Support