![PECLx Closed-Loop Phase Noise, fVCSO = 1GHz, Mx[5:0] = 8, fPECLx = 125MHz](https://www.analog.com/-/media/analog/en/products/image/ltc/ltc6950-32169.png?imgver=1&h=500)
![PECLx Closed-Loop Phase Noise, fVCSO = 1GHz, Mx[5:0] = 8, fPECLx = 125MHz](https://www.analog.com/-/media/analog/en/products/image/ltc/ltc6950-32169.png?imgver=1&h=270)
Overview
Features and Benefits
- Low Phase Noise and Jitter
- Additive Jitter: 18fsRMS (12kHz to 20MHz)
- Additive Jitter: 85fsRMS (10Hz to Nyquist)
- EZSync™ Multichip Clock Edge Synchronization
- Full PLL Core with Lock Indicator
- –226dBc/Hz Normalized In-Band Phase Noise Floor
- –274dBc/Hz Normalized 1/f Phase Noise
- 1.4GHz Maximum VCO Input Frequency
- Four Independent, Low Noise 1.4GHz LVPECL Outputs
- One LVDS/CMOS Configurable Output
- Five Independently Programmable Dividers Covering All Integers from 1 to 63
- Five Independently Programmable VCO Clock Cycle Delays Covering All Integers from 0 to 63
- –40°C to 105°C Junction Temperature Range
Product Details
The LTC6950 is a low phase noise integer-N frequency synthesizer core with clock distribution. The LTC6950 delivers the low phase noise clock signals demanded in high frequency, high resolution data acquisition systems.
The frequency synthesizer contains a full low noise PLL core with a programmable reference divider (R), a programmable feedback divider (N), a phase/frequency detector (PFD) and a low noise charge pump (CP). The clock distribution section of the LTC6950 delivers up to five outputs based on the VCO input. Each output is individually programmed to divide the VCO input frequency by any integer from 1 to 63 and to delay the output by 0 to 63 VCO clock cycles. Four of the outputs feature very low noise, low skew LVPECL logic signals capable of operation up to 1.4GHz. The fifth output is selectable as either an LVDS (800MHz) or CMOS (250MHz) logic type. This output is also programmed to produce an output signal based on either the VCO input or the reference divider output.
Applications
- Clocking High Speed, High Resolution ADCs, DACs and Data Acquisition Systems
- Low Jitter Clock Generation and Distribution
Product Categories
Markets and Technologies
Product Lifecycle
Last Time Buy
All products in this family will be obsolete soon. Please contact ADI Sales or Distributors to arrange for final purchases and read our Obsolescence Information to review the time periods for placing final orders and receiving final shipments.
Evaluation Kits (1)
Documentation & Resources
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R565 Reliability Data3/23/2018
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DC1795A - Demo Manual1/5/2015
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1.4GHz Clean Clocking Solution2/6/2015
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1.4GHz Low Jitter PLL with Clock Distribution Solves Difficult Clocking Problems: Multi-Clock Synchronization and Data Converter Clocking1/1/2015 LT Journal
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Multi-Output Clock Synthesizer with Integrated VCO Features the Low Jitter Required to Drive Modern High Speed ADC and DAC Clock Inputs5/1/2006 LT Journal
Software & Systems Requirements
Evaluation Software
ClockWizard
ClockWizard builds on PLLWizard and simplifies the evaluation process of the LTC6950. Besides the ability to design the loop filter components and predict the resulting phase noise and jitter performance, ClockWizard introduces a scope plot which shows the LTC6950 outputs in the time domain and illustrates the phase relationships between the outputs based on their respective EZSync settings. It also controls the LTC6950 demoboard via the DC590 or DC2026.
Tools & Simulations
Linduino
Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.
Linduino code repository on GitHub and instructions on how to use the code.
IBIS Models
IBS
LTC6950 IBIS Model
330.00K
Product Recommendations
LTC6950 Companion Parts
Design Resources
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
| Part Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LTC6950IUHH#TRPBF | Material Declaration | Reliability Data | 48-Lead QFN (5mm x 9mm x 0.75mm w/ EP) | |
| Wafer Fabrication Data | R565 Reliability Data |
PCN-PDN Information
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Support & Discussions
LTC6950 Discussions
Sample & Buy
Ordering FAQs
See our Ordering FAQs for answers to questions about online orders, payment options and more.
Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
List Pricing
(*)The 1Ku 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 Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Lead Times
Please see the latest communication from our CCO regarding lead times.
Sampling
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.