{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"LTC6948IUFD-3#PBF","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"LTC6948IUFD-3PBF","canonicalUrl":"https://icboms.com/analog-devices/LTC6948IUFD-3PBF","factsUrl":"https://icboms.com/api/mcp/products/LTC6948IUFD-3%23PBF","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices LTC6948IUFD-3#PBF, a PLL-based Clock/Frequency Synthesizer (RF/IF), Fractional N, 1:1 input:output ratio, differential I/O, max frequency 5.79 GHz, 3.15V to 5.25V supply, -40°C to 105°C, 28-WFQFN exposed pad.","salesMarkdown":"## Active production — what that means for your BOM ROHS3 compliant per, which simplifies EU/UKCA compliance paperwork. The 28-QFN package is a common footprint — 4x5 mm, 0.5 mm pitch — so the board layout is straightforward and assembly houses are familiar with the reflow profile. ## 5.79 GHz fractional-N — where the frequency ceiling lands This is a fractional-N PLL synthesizer that clocks out to 5.79 GHz maximum. That puts it in the sweet spot for 5G sub-6 GHz LO generation, point-to-point microwave IF chains, and test equipment that needs a clean, agile carrier up to C-band. Fractional-N architecture means you get fine step resolution without an external VCO — the loop filter and reference clock set the phase noise floor. The differential I/O helps reject common-mode noise when routing to a mixer or upconverter. ## Industrial temp range and supply flexibility The 3.15V to 5.25V supply lets you tap a 3.3V or 5V rail directly — no extra LDO needed if your board already carries one of those. ## Sourcing through independent distribution We source the LTC6948IUFD-3#PBF per RFQ against your BOM line. The Tube package is the standard production format; reel variants exist if your pick-and-place prefers tape.","metaTitle":"LTC6948IUFD-3#PBF Clock/Frequency Synthesizer, Fractional-N","metaDescription":"Analog Devices LTC6948IUFD-3#PBF PLL-based fractional-N synthesizer, 5.79 GHz max, -40°C to 105°C, 28-QFN. Active, ROHS3 compliant. Sourced per RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Clock & Timing ICs"],"specifications":{"PLL":"Yes","Type":"Clock/Frequency Synthesizer (RF/IF), Fractional N","Input":"Clock","Output":"Clock","Package":"Tube","Mounting Type":"Surface Mount","Package / Case":"28-WFQFN Exposed Pad","Frequency - Max":"5.79GHz","lifecycle_stage":"eol_hot","Voltage - Supply":"3.15V ~ 5.25V","Divider/Multiplier":"Yes/No","Number of Circuits":"1","Ratio - Input:Output":"1:1","Operating Temperature":"-40°C ~ 105°C","Supplier Device Package":"28-QFN (4x5)","Differential - Input:Output":"Yes/Yes"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$19.09","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$19.09000","currency":"USD"},{"qty":10,"price":"$17.54400","currency":"USD"},{"qty":25,"price":"$16.81640","currency":"USD"},{"qty":100,"price":"$14.81670","currency":"USD"},{"qty":250,"price":"$14.08952","currency":"USD"},{"qty":500,"price":"$13.18050","currency":"USD"}]},"links":{"datasheetUrl":"https://www.analog.com/media/en/technical-documentation/data-sheets/6948fa.pdf","sourceUrl":null},"ai":{"faq":[{"question":"When sourcing LTC6948IUFD-3#PBF, what's the closest functional second-source — LTC6948IUFD-4#PBF?","answer":"The LTC6948IUFD-4#PBF is a pin-compatible sibling with a higher max frequency of 6.39 GHz. The -3 variant tops out at 5.79 GHz. If your LO needs stay below 5.79 GHz, the -3 is the correct choice; the -4 adds headroom at a slightly higher cost. Both share the same 28-QFN package, supply range, and temp grade."},{"question":"What reference clock does LTC6948IUFD-3#PBF require?","answer":"The input is a single-ended or differential clock. The datasheet (not reproduced here) specifies the reference frequency range and phase-noise requirements for the loop filter design. Typical choices are a TCXO or OCXO between 10 MHz and 100 MHz, depending on the desired output step size and phase noise target."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/LTC6948IUFD-3PBF","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/LTC6948IUFD-3PBF when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}