Part Number: AK8125AE

Manufacturer: AKM [Asahi Kasei Microsystems]

Description: EMI Countermeasure Spectrum Scan Diffusion IC

Shipped from: Shenzhen/HK Warehouse

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The AK8125AE is a highly effective spread spectrum clock generator created especially for removing electromagnetic interference (EMI). A thorough explanation of the AK8125AE’s features, capabilities, and applications is intended to be given in this extensive reference. This article will provide you with the skills you need to take full advantage of the AK8125AE, whether you’re an engineer, designer, or just curious about spread spectrum clock generators.


The AK8125A is a spread spectrum clock generator made for EMI reduction in general. The system performance is not affected by the device’s excellent EMI reduction effect, which uses the AKM’s native spread spectrum profile. The device comes in a tiny 10-pin TMSOP box, and the placement of its pins allows for a straightforward PCB.

Understanding Spread Spectrum Clock Generation

Spread Spectrum Clock Generation (SSCG) is a technique that varies the frequency of a clock signal to spread its energy across a wider frequency band.

The benefits of spread spectrum clock generation include

  • Spread spectrum clocking lowers electromagnetic interference (EMI) emissions by cutting down on the clock signal’s concentrated energy peaks.
  • Improved Signal Integrity: It lessens clock-related jitter and noise, which improves signal quality and cuts down on timing errors.
  • Avoiding interference: Spread spectrum clocking lessens the overlap of clock signals with other frequency bands, which helps to avoid interference.
  • Easier EMI Compliance: Spread spectrum clock generator integration makes it easier to achieve EMI compliance for electrical equipment.

EMI reduction is achieved through

  • Spreading frequencies: By changing the clock frequency, energy peaks are dispersed over a larger bandwidth.
  • Modulation strategies use energy distribution to optimize less sensitive regions and minimize crucial frequencies.
  • Spreading the clock frequency lowers harmonic energy and minimizes interference with other devices.
  • Spread spectrum clocking increases signal integrity and eliminates noise coupling, which lowers noise and jitter, and mistakes.
  • Spread spectrum clock generation reduces EMI, improves signal integrity, prevents interference, and makes it easier for electrical devices to comply with EMI standards.

What is AK8125AE?

A spread spectrum clock generator called the AK8125AE was created with the goal of reducing electromagnetic interference (EMI) in general. It provides a very effective method for lowering EMI emissions in different electrical systems. The AK8125AE incorporates cutting-edge technologies and customizable options to give designers flexibility and simplicity of use.

AK8125AE Key Features and Specifications

  • Spread Spectrum Clock Generation: To distribute the energy of the clock signal and lower EMI emissions, the AK8125AE uses spread spectrum clocking techniques.
  • Wide Frequency Range: It is useful for a variety of applications since it supports a wide range of clock frequencies.
  • Multiple programmable clock output options are offered by the AK8125AE, letting users customize the clock signals to meet particular needs.
  • Frequency Modulation Modes: It provides a variety of modulation modes, including center spread, down spread, and external modulation, allowing for customization in accordance with the requirements of the application.
  • Performance with Low Jitter: The AK8125AE ensures low-jitter output clocks, improving signal integrity and system dependability.
  • Integrated EMI Filters: These filters help to further reduce electromagnetic interference and improve the device’s overall EMI reduction capabilities.
  • Wide Supply Voltage Range: The AK8125AE operates across a wide supply voltage range, supporting different power supply setups.
  • Compact Package: It is offered in a small package that makes it possible to integrate it into various PCB layouts with minimal wasted space.

Comparison with Other Clock Generators

There are a number of things to take into account when contrasting the AK8125AE with other clock generators, including:

  • The AK8125AE is capable of EMI reduction because it was created with that goal in mind, making it a targeted and superior option.
  • Programmability: The AK8125AE provides flexibility in adapting clock outputs to particular application requirements thanks to a variety of programmable capabilities.
  • Integration: By including EMI filters and operating over a wide voltage range, the AK8125AE makes system design and deployment easier.
  • Performance: To determine whether a device is appropriate for a certain application, it is crucial to examine performance criteria such as jitter levels, frequency range, and output options.

By weighing these aspects, designers can decide if the AK8125AE meets their unique requirements and offers a superior alternative for EMI reduction and clock production compared to other products on the market.

AK8125AE Operation and Configuration

Clock Output Options:

  • Single-Ended and Differential Clock Outputs.
  • Selectable Output Frequencies.

Frequency Modulation Modes:

  • Center Spread for balanced frequency deviation.
  • Down Spread for emissions reduction in specific frequency bands.
  • External Modulation for dynamic control.

Programmable Features and Controls:

  • Adjustable Frequency Deviation for fine-tuning spread spectrum effect.
  • Programmable Modulation Rate for flexibility.
  • Output Enable/Disable for power-saving or signal management.

External Components and Interfacing Requirements:

  • External Crystal or Clock Input as a reference signal.
  • Stable Power Supply within the specified voltage range.
  • Consideration of output load requirements.
  • Proper PCB layout for grounding, signal routing, and decoupling.
  • Control and Configuration Interface for programming and configuration.

Consideration of these factors enables effective utilization of the AK8125AE’s features and customization for specific application requirements.

Frequently Asked Questions

● What is the AK8125AE’s main function?

Spread spectrum clock generators like the AK8125AE are made to lessen electromagnetic interference (EMI) in electronic systems.

● What are the AK8125AE’s main advantages?

The AK8125AE provides electronic equipment with EMI reduction, enhanced signal integrity, interference avoidance, and easier EMI compliance.

● What kind of clock outputs is the AK8125AE capable of producing?

To meet the needs of various systems, the AK8125AE provides single-ended and differential clock outputs.

● With the AK8125AE, can I choose the desired clock frequency?

The AK8125AE does, in fact, have adjustable output frequencies, offering users the freedom to select the preferred clock frequency in accordance with their unique application requirements.

● What frequency modulation modes does the AK8125AE support?

For various EMI reduction techniques, the AK8125AE supports center spread, down spread, and external modulation modes.

● Are the AK8125AE’s features programmable?

Yes, the AK8125AE provides programmable capabilities, allowing customization and control over its functioning. These features include frequency deviation, modulation rate, and output enable/disable choices.

● What more parts are necessary to run the AK8125AE?

Standard requirements for the AK8125AE include an external crystal or clock input used as a reference signal, a reliable power source operating within the required voltage range, and consideration of the output load specifications.

● When using the AK8125AE, how should the PCB layout be designed?

For best performance, a PCB layout must be well thought out. To reduce noise coupling and maintain signal integrity, it should use suitable grounding, signal routing, and decoupling procedures.

● The AK8125AE has a control and configuration interface, right?

To program and configure its numerous features and modes, the AK8125AE may have control pins or interface choices.


As technology evolves, spread spectrum clocking techniques are expected to advance further, with developments focusing on advanced modulation schemes, improved noise reduction algorithms, and enhanced integration with other components. The demand for higher data rates, increased device densities, and stricter EMI regulations will drive the need for efficient spread spectrum clock generators. The AK8125AE showcases ongoing innovation in this field, and we are excited to witness emerging advancements. Reach out to our experts at ICRFQ today and unlock the full potential of your projects. Take the first step towards success now!

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Kevin Chen