Fractional-N PLL for Performance Computing in Samsung 14LPP

Overview

Perceptia’s DeepSub™ pPLL03F is an all digital PLL featuring low-jitter and compact area suitable for clocking applications with critical timing requirements at frequencies up to 4GHz. It is suitable as a clock source for performance computing blocks and ADCs/DACs with moderate SNR requirements.

To give SoC designers the maximum flexibility in building complex multi-domain clock systems, pPLL03F is very small (< 0.004 sq mm) and low power (< 1.3 mW). It is well suited to applications with many clock domains where each is driven by their own PLL. To simplify system design, PLL03 has an integrated power supply regulator which allows multiple instances of PLL03 to share common power supplies. Alternatively instances of pPLL03 can share supplies with the blocks that use its output clock.

pPLL03 integrates easily into any SoC design and includes all the views and models required by modern back end flows.

The pPLL03F is built using Perceptia’s second generation all digital PLL technology. This robust technology delivers identical performance regardless of PVT conditions. It consumes a small fraction of the area of an analog PLL whilst maintaining comparable performance.

pPLL03F can be used as an integer-N PLL or as a fractional-N PLL. The fractional-N mode provides a high flexibility to choose the best combination of input and output clock frequencies at the system level.

Perceptia further provides integration support and offers customization and migration services.

Key Features

Low jitter, suitable for many clocking applications, including high speed digital, ADC, DAC, medium-speed PHY
Extremely small die area (< 0.004 sq mm), using a ring oscillator
Output frequency can be from 1 to 400 times the input reference, up to 4GHz
Reference clock from 10MHz to 500MHz
Second-generation digital PLL architecture, providing integer and fractional multiplication
Two PLL outputs via separate postscalers
Post-scalers programmable from 1 to 2,040
Lock-detect output
Can generate a spread-spectrum clock from a clean reference
Oscillator output duty cycle better than 48 / 52% on CK_PLL_OUT0 and CK_PLL_OUT1
Highly testable using industry standard flows

ATPG vectors provided
Specification of functional tests to supplement ATPG testing

Industrial operating conditions (-40 to 85°C) with junction temperature up to 100°C

Benefits

Fractional multiplication with frequency up to 4GHz
Low jitter (< 10 ps RMS)
Small size (< 0.004 sq mm)
Low Power (< 1.3 mW)
Support for multi-PLL systems with tens of PLLs per SoC
Easy integration

Block Diagram

Applications

Performance Computing
Complex SoCs with many clock domains
Low-jitter applications
Moderate SNR ADC/DAC

Deliverables

Datasheet
Detailed Verilog behavioral model
Timing models
LEF5.6 abstract for floor planning/chip assembly
Integration Guide
DFT Guide
Integration support
Characterization report
GDSII layout macrocell
CDL netlist for LVS
DRC, LVS and SI verification reports
Netlist model with accompanying documentation allowing integration of the module in scan chains

Technical Specifications

Foundry, Node

Samsung 14LPP. Portable to all CMOS processes 65nm and smaller.

Maturity

In development

Availability

Q1 2021

Samsung

Pre-Silicon: 14nm

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