LTC1069-6 - Single Supply, Very Low Power, Elliptic Lowpass Filter


  • 8th Order Elliptic Filter in SO-8 Package
  • Single 3V Operation: Supply Current: 1mA (Typ) fCUTOFF: 14kHz (Max) S/N Ratio: 72dB
  • Single 5V Operation:Supply Current: 1.2mA (Typ)fCUTOFF: 20kHz (Max)S/N Ratio: 79dB
  • ±0.1dB Passband Ripple Up to 0.9fCUTOFF (Typ)
  • 42dB Attenuation at 1.3fCUTOFF
  • 66dB Attenuation at 2.0fCUTOFF
  • 70dB Attenuation at 2.1fCUTOFF
  • Wide Dynamic Range, 75dB or More (S/N + THD),Under Single 5V Operation
  • Wideband Noise: 120µVRMS
  • Clock-to-fCUTOFF Ratio: 50:1
  • Internal Sample Rate: 100:1

Typical Application

LTC1069-6 Typical Application
LTC1069-6 Typical Application


The LTC1069-6 is a monolithic low power, 8th order lowpass filter optimized for single 3V or single 5V supply operation. The LTC1069-6 typically consumes 1mA under single 3V supply operation and 1.2mA under 5V operation.

The cutoff frequency of the LTC1069-6 is clock tunable and it is equal to the clock frequency divided by 50. The input signal is sampled twice per clock cycle to lower the risk of aliasing.

The typical passband ripple is ± 0.1dB up to 0.9fCUTOFF. The gain at fCUTOFF is –0.7dB. The transition band of the LTC1069-6 features progressive attenuation reaching 42dB at 1.3fCUTOFF and 70dB at 2.1fCUTOFF. The maximum stopband attenuation is 72dB.

The LTC1069-6 can be clock tuned for cutoff frequencies up to 20kHz (single 5V supply) and for cutoff frequencies up to 14kHz (single 3V supply).

The low power feature of the LTC1069-6 does not penalize the device’s dynamic range. With single 5V supply and an input range of 0.4VRMS to 1.4VRMS, the Signal-to- (Noise + THD) ratio is ≥70dB. The wideband noise of the LTC1069-6 is 125μVRMS.

Other filter responses with higher speed can be obtained. Please contact LTC Marketing for details.

The LTC1069-6 is available in an 8-pin SO package.


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
LTC1069-6CS8#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1069-6CS8#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1069-6IS8#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1069-6IS8#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes

LTC1069-6 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
LTC1069-6CS8#PBF SO-8 C $6.25 $4.80 Yes
LTC1069-6CS8#TRPBF SO-8 C $4.86 Yes
LTC1069-6IS8#PBF SO-8 I $6.85 $5.25 Yes
LTC1069-6IS8#TRPBF SO-8 I $5.31 Yes
Buy NowRequest Samples
* 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.

Click here to view our complete list of demo boards


  • Handheld Instruments
  • Telecommunication Filters
  • Antialiasing Filters
  • Smoothing Filters
  • Audio
  • Multimedia

Product Notifications

Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.

Forgot your password? Click here.
Need help? Email with questions and comments.

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 IV - 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!

Technical Support