LTC1264-7 - Linear Phase, Group Delay Equalized, 8th Order Lowpass Filter
Features
- Steeper Roll-Off Than Bessel Filters
- High Speed: fC </= 200kHz
- Phase Equalized Filter in a 14-Pin Package
- Phase and Group Delay Response Fully Tested
- Transient Response Exhibits 5% Overshoot and No Ringing
- 65dB THD or Better Throughout a 100kHz Passband
- No External Components Needed
- Available in Plastic 14-Pin DIP and 16-Pin SO Wide Packages
Typical Application
Description
The LTC1264-7 is a clock-tunable monolithic 8th order lowpass filter with linear passband phase and flat group delay. The amplitude response approximates a maximally flat passband and exhibits steeper roll-off than an equivalent 8th order Bessel filter. For instance, at twice the cutoff frequency, the filter attains 28dB attenuation (vs 12dB for Bessel), while at three times the cutoff frequency, the filter attains 55dB attenuation (vs 30dB for Bessel).The cutoff frequency of the LTC1264-7 is tuned via an external TTL or CMOS clock. The clock-to-cutoff frequency ratio of the LTC1264-7 can be set to 25:1 (pin 10 to V+) or 50:1 (pin 10 to V–). When the filter operates at clock-to-cutoff frequency ratio of 25:1, the input is double-sampled to lower the risk of aliasing.
The LTC1264-7 is optimized for speed. Depending on the operating conditions, cutoff frequencies between 200kHz and 250kHz can be obtained. (Please refer to the Passband vs Clock Frequency graphs.)
The LTC1264-7 is pin-compatible with the LTC1064-X series.
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 |
|---|---|---|---|---|---|
| LTC1264-7CN#PBF | N-14 | N | C | 05-08-1510 (N14) | Yes |
| LTC1264-7CSW#PBF | SW-16 | SW | C | 05-08-1620 (SW16) | Yes |
| LTC1264-7CSW#TRPBF | SW-16 | SW | C | 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 | |
|---|---|---|---|---|---|---|
| LTC1264-7CN#PBF | N-14 | C | $16.65 | $13.70 | Yes | |
| LTC1264-7CSW#PBF | SW-16 | C | $20.85 | $16.90 | Yes | |
| LTC1264-7CSW#TRPBF | SW-16 | C | $16.96 | 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
- Data Communication Filters
- Time Delay Networks
- Phase Matched 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:
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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.
