Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers

Part Number	Description / PDF	Quantity
ADF4110BRUZ-RL7 Analog Devices, Inc.	IC PLL FREQ SYNTHESIZER 16-TSSOP	1104
ADF4107BRU-REEL Analog Devices, Inc.	PLL FREQUENCY SYNTHESIZER	17060
ADF4112BCPZ Analog Devices, Inc.	IC PLL FREQ SYNTH 3GHZ 20-LFCSP	69
AD9518-0ABCPZ Analog Devices, Inc.	IC CLOCK GEN 6CH 2.8GHZ 48LFCSP	0
HMC832ALP6GE Analog Devices, Inc.	IC INTEGER-N/FRACTIONAL 40LFCSP	0
ADF4351BCPZ Analog Devices, Inc.	IC SYNTH PLL VCO 32LFCSP	913
ADF4218LBRUZ-REEL Analog Devices, Inc.	IC PLL FREQ SYNTHESIZER 20TSSOP	0
HMC832LP6GE Analog Devices, Inc.	IC PLL FRACTIONAL-N VCO 40SMD	0
AD9520-5BCPZ Analog Devices, Inc.	CLOCK GENERATOR, 250MHZ, CMOS	2162
HMC535LP4E Analog Devices, Inc.	IC MMIC PHASE LOCK OSC 24-QFN	3
LTC6947IUFD#PBF Analog Devices, Inc.	IC SYNTHESIZER FRACT-N PLL 28QFN	1588
AD9516-1BCPZ-REEL7 Analog Devices, Inc.	CLOCK DRIVER, 9516 SERIES, 10 TR	959
ADF4157BRUZ Analog Devices, Inc.	PLL FREQUENCY SYNTHESIZER, CMOS,	27
ADF4360-3BCPRL Analog Devices, Inc.	PHASE LOCKED LOOP WITH VCO	513
LTC6953IUKG#TRPBF Analog Devices, Inc.	IC FANOUT BUFFER 52QFN	0
ADF4360-9BCPZ Analog Devices, Inc.	IC SYNTHESIZER W/ADJ VCO 24LFCSP	18
ADF4107BCP-REEL Analog Devices, Inc.	PLL FREQUENCY SYNTHESIZER	15000
ADF4118BRU-REEL7 Analog Devices, Inc.	PLL FREQUENCY SYNTHESIZER	1000
AD9516-2BCPZ Analog Devices, Inc.	IC CLOCK PLL/VCO 2.2GHZ 64LFCSP	19
ADF4158CCPZ Analog Devices, Inc.	IC FRACTION N FREQ SYNT 24LFCSP	12112

Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers

1. Overview

Clock and timing ICs are semiconductor devices that generate, regulate, and distribute timing signals in electronic systems. Key components include Clock Generators (produce stable clock signals), Phase-Locked Loops (PLLs, synchronize signals with phase alignment), and Frequency Synthesizers (generate precise frequencies from reference signals). These devices ensure synchronization across components in modern electronics, enabling reliable operation in communication systems, computing devices, and industrial equipment.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
Clock Generators	Produce fixed or programmable clock signals with low jitter	Microprocessors, FPGAs, networking equipment
PLLs	Align output signal phase with reference input, enable frequency multiplication	Wireless transceivers, data recovery circuits
Frequency Synthesizers	Generate multiple frequencies from single reference with high precision	5G base stations, satellite communication systems

3. Structure and Components

Typical clock ICs feature: 1) Crystal oscillator interface for reference signal input; 2) Internal voltage-controlled oscillator (VCO); 3) Phase detector and loop filter (PLL components); 4) Programmable dividers; 5) Output buffers. Advanced packages include QFN (4x4mm to 8x8mm) and TSSOP with 8-48 pins. Integration levels vary from single-channel devices to multi-output clock generators with integrated EEPROM.

4. Key Technical Specifications

Parameter	Typical Range	Importance
Frequency Range	1 kHz - 3.6 GHz	Determines application compatibility
Phase Noise	-150 to -120 dBc/Hz	Impacts signal integrity
Jitter (RMS)	50 fs - 1 ps	Critical for high-speed systems
Power Consumption	10-300 mA	Affects thermal design
Temperature Stability	20-100 ppm	Ensures reliability in harsh environments

5. Application Fields

Telecommunications: 5G NR base stations, optical transceivers
Computing: Server motherboards, PCIe clocks
Industrial: Precision test equipment, motor control systems
Automotive: ADAS sensors, infotainment systems
Medical: MRI imaging systems, patient monitoring devices

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
TI (Texas Instruments)	LMX2594	15-GHz wideband PLL with integrated VCO
Analog Devices	AD9548	4-channel clock generator with 0.1 ppb accuracy
STMicroelectronics	CLK2692	Programmable 2-output synthesizer for automotive
Microchip	ZL30264	High-performance network synchronizer

7. Selection Guidelines

Key selection criteria: 1) Required output frequency and voltage levels; 2) Acceptable phase noise/jitter specifications; 3) Number of required outputs; 4) Operating temperature range; 5) Power budget constraints; 6) Integration level (e.g., single-chip vs. discrete VCO solutions). For wireless applications, prioritize low phase noise. For portable devices, emphasize power efficiency.

8. Industry Trends

Future developments include: 1) Higher integration with on-chip EEPROM and multi-phase outputs; 2) Advancement to sub-10fs jitter performance; 3) Development of radiation-hardened variants for aerospace; 4) Adoption of 3D packaging for reduced EMI; 5) Increased use of AI-enabled dynamic frequency scaling. The market is projected to grow at 7.2% CAGR through 2027 driven by 5G and automotive electrification.