LTC6950
Obsolete1.4GHz Low Phase Noise, Low Jitter PLL with Clock Distribution
- Part Models
- 1
- 1ku List Price
- price unavailable
Part Details
- 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
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
Documentation
Data Sheet 1
Reliability Data 1
User Guide 1
Application Note 1
Technical Articles 2
Solutions Bulletin & Brochure 1
Product Selector Card 2
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 Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC6950IUHH#TRPBF | 48-Lead QFN (5mm x 9mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Sep 24, 2021 - 21_0121 Obsolescence of LTC6945, LTC6946, and LTC6950 |
||
| LTC6950IUHH#TRPBF | Obsolete | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Evaluation Software 1
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.
Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Clock Distribution Devices 2 | ||
| HMC1031 | LAST TIME BUY | 0.1 MHz to 500 MHz Clock Generator with Integer N PLL |
| LTC6954 | LAST TIME BUY | Low Phase Noise, Triple Output Clock Distribution Divider/Driver |
| High Speed Comparators (<100ns Propagation Delay) 1 | ||
| LTC6957 | Low Phase Noise, Dual Output Buffer/Driver/Logic Converter | |
| Signal Chain µModule Receivers 1 | ||
| LTM9013 | LAST TIME BUY | 300MHz Wideband Receiver |
| Standard High Speed A/D Converters 2 | ||
| LTC2157-14 | PRODUCTION | Dual 14-Bit 250Msps ADCs |
| LTC2208 | PRODUCTION | 16-Bit, 130Msps ADC |
Tools & Simulations
Linduino 3
IBIS Model 1
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.
Evaluation Kits
LTC6950 Demo Board | Integer-N PLL with 5 Outputs (Requires DC590 or DC2026)