LMK04828集成电路（IC）的时钟发生器PLL频率合成器规格书PDF中文资料

1 Features

1• EP Features

– Gold Bondwires

– Temperature Range: –55 to +105 °C

– Lead Finish SnPb

• Maximum Distribution Frequency: 3.2 GHz

• JESD204B Support

• Ultra-Low RMS Jitter

– 88-fs RMS Jitter (12 kHz to 20 MHz)

– 91-fs RMS Jitter (100 Hz to 20 MHz)

– –162.5 dBc/Hz Noise Floor at 245.76 MHz

• Up to 14 Differential Device Clocks From PLL2

– Up to 7 SYSREF Clocks

– Maximum Clock Output Frequency 3.2 GHz

– LVPECL, LVDS, HSDS, LCPECL

Programmable Outputs From PLL2

• Up to 1 Buffered VCXO/Crystal Output From PLL1

– LVPECL, LVDS, 2xLVCMOS Programmable

• Multi-Mode: Dual PLL, Single PLL, and Clock

Distribution

• Dual Loop PLLatinum™ PLL Architecture

• PLL1

– Up to 3 Redundant Input Clocks

– Automatic and Manual Switchover Modes

– Hitless Switching and LOS

– Integrated Low-Noise Crystal Oscillator Circuit

– Holdover Mode When Input Clocks are Lost

• PLL2

– Normalized [1 Hz] PLL Noise Floor of

–227 dBc/Hz

– Phase Detector Rate up to 155 MHz

– OSCin Frequency-Doubler

– Two Integrated Low-Noise VCOs

• 50 Duty Cycle Output Divides, 1 to 32

(Even and Odd)

• Precision Digital Delay, Dynamically Adjustable

• 25-ps Step Analog Delay

• 3.15-V to 3.45-V Operation

• Package: 64-Pin WQFN (9.0 mm × 9.0 mm × 0.8

mm)

2 Applications

• Wireless Infrastructure

• Data Converter Clocking

• Networking, SONET/SDH, DSLAM

• Medical / Video / Military / Aerospace

• Test and Measurement

3 Description

The LMK04828-EP device is the industry's highest

performance clock conditioner with JESD204B

support.

The 14 clock outputs from PLL2 can be configured to

drive seven JESD204B converters or other logic

devices using device and SYSREF clocks. SYSREF

can be provided using both DC and AC coupling. Not

limited to JESD204B applications, each of the 14

outputs can be individually configured as highperformance

outputs for traditional clocking systems.

The high performance combined with features like the

ability to trade off between power or performance,

dual VCOs, dynamic digital delay, holdover, and

glitchless analog delay make the LMK04828-EP ideal

for providing flexible high-performance clocking trees.