LMK04805BEVAL
クロック・ジッタ・クリーナ、デュアル・カスケード接続 PLL/ 2.2GHz VCO 内蔵
LMK04805BEVAL
概要
The LMK04800 family is the industry's highest performance clock conditioner with superior clock jitter cleaning, generation, and distribution with advanced features to meet next generation system requirements. The dual loop PLLatinum? architecture enables 111 fs rms jitter (12 kHz to 20 MHz) using a low noise VCXO module or sub-200 fs rms jitter (12 kHz to 20 MHz) using a low cost external crystal and varactor diode.
The dual loop architecture consists of two high-performance phase-locked loops (PLL), a low-noise crystal oscillator circuit, and a high-performance voltage controlled oscillator (VCO). The first PLL (PLL1) provides a low-noise jitter cleaner function while the second PLL (PLL2) performs the clock generation. PLL1 can be configured to either work with an external VCXO module or the integrated crystal oscillator with an external tunable crystal and varactor diode. When used with a very narrow loop bandwidth, PLL1 uses the superior close in phase noise (offsets below 50 kHz) of the VCXO module or the tunable crystal to clean the input clock. The output of PLL1 is used as the clean input reference to PLL2 where it locks the integrated VCO. The loop bandwidth of PLL2 can be optimized to clean the far-out phase noise (offsets above 50 kHz) where the integrated VCO outperforms the VCXO module or tunable crystal used in PLL1.
特長
- Multi-mode: Dual PLL, single PLL, and clock distribution
- Dual Loop PLLatinum PLL Architecture
- PLL1
> Holdover mode when input clocks are lost
+ Automatic or manual triggering/recovery
- PLL2
> Integrated Low-Noise VCO - 2 redundant input clocks with LOS
- Automatic and manual switch-over modes - 50% duty cycle output divides, 1 to 1045 (even and odd)
- LVPECL, LVDS, or LVCMOS programmable outputs
- Precision digital delay, fixed or dynamically adjustable
- 25 ps step analog delay control.
- 14 differential outputs. Up to 26 single ended.
- Up to 6 VCXO/Crystal buffered outputs - 0-delay mode
Contents:
- Evaluation board
- LPT programming cable (USB interface available separately)
- Quick start sheet
クロック ジッタ クリーナ
購入と開発の開始
LMK04805BEVAL/NOPB — Clock Jitter Cleaner With Dual Cascaded PLLs and Integrated 2.2 GHz VCO
TICSPRO-SW — TICS Pro GUI and Live Programming Tool for Clocking Devices
TICSPRO-SW — TICS Pro GUI and Live Programming Tool for Clocking Devices
TICS Pro 1.7.7.6 installer binary for Windows operating system
製品
クロック・ジェネレータ
クロック・バッファ
Oscillators
クロック ジッタ クリーナ
クロック ネットワーク シンクロナイザ
RF PLL / シンセサイザ
ハードウェア開発
評価ボード
ドキュメント
TICS Pro 1.7.7.6 Release Notes
TICS Pro 1.7.7.6 Software Manifest
リリース情報
Added Features
LMK5Bxxyyy, LMK5Cxxyyy
- Warnings and errors improved, particularly corrective suggestions
- REFx_FREQ=0 automatically disables DPLL reference input selection for that input
- Input validation enabled and disabled by start page settings, including 1PPS
- APLL reference selection moved to Step 5, just before clock output definition
- Quick-set multiple outputs to the same settings on frequency planner
- BAW VCO allows some ppm deviation
- Force SYSREF option on OUT0/1
- Expose DPLLx_LCK_TIMER field
- Match LMK05318B EEPROM page design
- .EPR export option
- EEPROM SRAM programming generation support
- For complete changelist, see release notes
LMK3H0102
- Configuration search tool
- Wizard: voltage selection option
Bug Fixes
- LMK04832-SP, LMK04832-SEP, LMK04714-Q1, LMK04368-EP - PD_FIN0 corrected to FIN0_PD
- LMK3H0102 - Several wizard bugfixes
Known Issues
- LMK5C33216 - When cascading from VCO3 to DPLL input, the divide value must manually be entered into DPLLx_REF5_RDIV as ( VCO3 output frequency / DPLLx TDC frequency )
- LMK05318 - In some cases, it is necessary to press "Calculate Frequency Plan" twice for correct VCO2 frequency. This issue is resolved in LMK05318B GUI.
- Burst mode page looping requires long delays to halt, and halting may crash the GUI. If possible, do not loop in burst mode.
- User Controls page can sometimes become desynchronized from Raw Registers and other pages. Refer to Raw Registers or other pages for correct values. Saving/Loading and Import/Export of register data is unaffected, and register data will still be written to and read from connected devices correctly.
技術資料
種類 | タイトル | 英語版のダウンロード | 日付 | |||
---|---|---|---|---|---|---|
* | EVM ユーザー ガイド (英語) | LMK0480x Evaluation Board Instructions (Rev. B) | 2014年 8月 4日 | |||
証明書 | LMK04805BEVAL/NOPB EU Declaration of Conformity (DoC) | 2019年 1月 2日 | ||||
EVM ユーザー ガイド (英語) | LMK048xx Evaluation Board User's Guide | 2013年 11月 26日 | ||||
EVM ユーザー ガイド (英語) | LMK0480x Evaluation Board Instructions | 2012年 1月 27日 |