LTC1065 - DC Accurate, Clock-Tunable Linear Phase 5th Order Bessel Lowpass Filter
Features
- Clock-Tunable Cutoff Frequency
- 1mV DC Offset (Typical)
- 80dB CMR (Typical)
- Internal or External Clock
- 50µVRMS Clock Feedthrough
- 100:1 Clock-to-Cutoff Frequency Ratio
- 80µVRMS Total Wideband Noise
- 0.004% Noise THD at 2VRMS Output Level
- 50kHz Maximum Cutoff Frequency
- Cascadable for Faster Roll-Off
- Operates from ±2.375 to µ8V Power Supplies
- Self-Clocking with 1 RC
Typical Application
Description
The LTC1065 is the first monolithic filter providing both clock-tunability with low DC output offset and over 12-bit DC accuracy. The frequency response of the LTC1065 closely approximates a 5th order Bessel polynomial. With appropriate PCB layout techniques the output DC offset is typically 1mV and is constant over a wide range of clock frequencies. With ±5V supplies and ±4V input voltage range, the CMR of the device is typically 80dB.
The filter cutoff frequency is controlled either by an internal or external clock. The clock-to-cutoff frequency ratio is 100:1. The on-board clock is nearly power supply independent and it is programmed via an external RC. The 50µVRMS clock feedthrough of the device is considerably lower than other existing monolithic filters.
The LTC1065 wideband noise is 80µVRMS and it can process large AC input signals with low distortion. With ±7.5V supplies, for instance, the filter handles up to 4VRMS (94dB S/N ratio) while the standard 1kHz THD is below 0.005%; 87dB dynamic range (S/N THD) is obtained with input levels between 2VRMS and 2.5VRMS.
The LTC1065 is available in 8-pin miniDIP and 16-pin SOL. For a Butterworth response, see LTC1063 data sheet. The LTC1065 is pin compatible with the LTC1063.
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 |
|---|---|---|---|---|---|
| LTC1065CN8#PBF | N-8 | N | C | 05-08-1510 (N8) | Yes |
| LTC1065CSW#PBF | SW-16 | SW | C | 05-08-1620 (SW16) | Yes |
| LTC1065CSW#TRPBF | SW-16 | SW | C | 05-08-1620 (SW16) | Yes |
| LTC1065IN8#PBF | N-8 | N | I | 05-08-1510 (N8) | Yes |
| LTC1065ISW#PBF | SW-16 | SW | I | 05-08-1620 (SW16) | Yes |
| LTC1065ISW#TRPBF | SW-16 | SW | I | 05-08-1620 (SW16) | Yes |
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 | |
|---|---|---|---|---|---|---|
| LTC1065CN8#PBF | N-8 | C | $6.70 | $5.50 | Yes | |
| LTC1065CSW#PBF | SW-16 | C | $7.15 | $5.90 | Yes | |
| LTC1065CSW#TRPBF | SW-16 | C | $5.96 | Yes | ||
| LTC1065IN8#PBF | N-8 | I | $7.35 | $6.05 | Yes | |
| LTC1065ISW#PBF | SW-16 | I | $7.90 | $6.50 | Yes | |
| LTC1065ISW#TRPBF | SW-16 | I | $6.56 | Yes | ||
| Buy Now • Request Samples | ||||||
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
- Strain Gauge Amplifiers
- Anti-Aliasing Filters
- Low Level Filtering
- Digital Voltmeters
- Smoothing Filters
- Reconstruction Filters
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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!
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
