The 8V19N470 is a fully integrated FemtoClock® NG jitter attenuator and clock synthesizer designed as a high-performance clock solution for conditioning and frequency/phase management of wireless base station radio equipment boards. The device is optimized to deliver excellent phase noise performance as required in GSM, WCDMA, LTE, LTE-A radio board implementations.
A two-stage PLL architecture supports both jitter attenuation and frequency multiplication. The first stage PLL is the jitter attenuator and uses an external VCXO for best possible phase noise characteristics. The second stage PLL locks on the VCXO-PLL output signal and synthesizes the target frequency. This PLL has two VCO circuits at 2949.12MHz and 2400MHz – 2500MHz, respectively, for enhanced frequency flexibility.
The device generates the output clock signals from the selected VCO by frequency division. Four independent integer frequency dividers are available. Delay circuits can be used for achieving alignment and controlled phase delay between clock signals. The two redundant inputs are monitored for activity. Four selectable clockswitching modes are provided to handle clock input failure scenarios. Auto-lock, individually programmable output frequency dividers and phase adjustment capabilities are added for flexibility. The device is configured through an SPI interface and reports PLL lock and signal loss status in internal registers, PLL lock status is also reported via two lock detect outputs. Internal status bit changes can also be reported via the nINT output. The device is ideal for driving converter circuits in wireless infrastructure, radar/imaging and instrumentation/medical applications.
For information regarding evaluation boards and material, please contact your local sales representative.
|PDF 1.23 MB||Datasheet|
|PDF 91 KB||Application Note|
|PDF 1.99 MB||Application Note|
|PDF 331 KB||Overview|
|PDF 495 KB||Application Note|
|PDF 115 KB||Application Note|
|PDF 233 KB||Application Note|
|PDF 565 KB||Application Note|
|PDF 438 KB||Application Note|
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
|Benefits of a Point-of-Use Clock for Jitter Optimization||Blog Post||Apr 27, 2021|