AK8185B

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The AK8185B is a low-profile clock generator that uses a Phase Locked Loop (PLL) to synthesize clock frequencies that are divisible by an input reference. This device operates over the 1.2 V to 3.3 V supply range and serves as an efficient way to generate multiple clock outputs from a single reference.

Built on a process suitable for low power and cost efficiency, the AK8185B is ideal for clock generation applications in which multiple output frequencies are needed while the reference frequency remains constant. Common application fields include computer systems, audio equipment, cell phones, communication systems, and personal data communication.

The AK8185B is able to generate clocks up to a frequency of 400MHz, depending on the device and the reference. This capability gives it the versatility to support a variety of clock generation applications, accommodating a combination of high speed and low power requirements.

The AK8185B utilizes advanced Phase Locked Loop (PLL) technology in order to synthesize clocks from an input reference. PLLs are designed to track an input signal within a bandwidth and maintain a constant phase relationship with the input reference. The AK8185B PLL acts as a digital frequency multiplier which allows the device to lock onto and track a reference frequency, and then accurately generate multiple frequencies based on the reference.

The PLL is controlled by a highly versatile internal Phase Frequency Detector (PFD). This detector determines the phase difference between the reference clock and the VCO output, and feeds this information back to the loop filter. The information is used to adjust the PLL\'s dividers to accurately attain the desired output frequency. In this way, the PLL is able to lower the jitter and improve the accuracy of the output clocks.

The AK8185B utilizes an integrated Frequency and Calibration Control (FCC) with a set of internal registers. This helps to ensure smooth, low phase noise clock signals over the operating temperature range. The FCC also helps to minimize frequency variation due to temperature, since it is able to store calibration information for automatically tuning and adjusting the frequency of each output channel.

The AK8185B also integrates a wide range of independent clock outputs. The outputs range from 4MHz to 400MHz, depending on the device and the reference. These output channels can be independently enabled and programmed, allowing users to customize the operation of the PLL for their specific application. Additionally, the device can generate a wide array of fanout ratios, allowing users to configure the same device for multiple clock applications.

The AK8185B is an extremely robust clock generator, able to efficiently generate multiple clocks from an input reference. With its advanced PLL technology and wide range of output channels, the device is well suited for many clock generation applications. Its on-chip features and low-profile form factor make the device a great choice for applications where low power, cost efficiency, and small size are paramount.

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