Overview
The AD9552BCPZ is a fractional-N phase-locked loop (PLL) based clock generator designed by Analog Devices Inc. It is specifically intended to replace high frequency crystal oscillators and resonators. This device offers a flexible and highly configurable solution for generating precise clock signals, making it suitable for a variety of applications requiring accurate timing and frequency synthesis.
Key Specifications
| Parameter | Description |
|---|---|
| PLL Type | Fractional-N phase-locked loop |
| Feedback Divider | Integer (8-bit) and fractional (20-bit) divide values |
| Output Drivers | LVDS and LVPECL, with adjustable drive strength |
| Serial Interface | 3-wire SPI, synchronous serial communications port |
| Package | 32-WFQFN Exposed Pad, CSP |
| RoHS Status | ROHS3 compliant |
| Power-On Reset | Internal power-on reset circuit with VCO calibration |
Key Features
- Fractional Frequency Synthesis: Supports integer-plus-fractional frequency upconversion with a wide range of output frequencies.
- Adjustable Output Drivers: Allows selection between LVDS and LVPECL output drivers with adjustable drive strength to handle different capacitive loads.
- Serial Control Port: A flexible 3-wire SPI interface for programming and controlling the device.
- PLL Locked Indicator: Provides a status indicator for PLL lock status.
- VCO Calibration: Automatic VCO calibration at power-up, with the option to use either the crystal oscillator or an external reference input.
Applications
The AD9552BCPZ is versatile and can be used in various applications requiring precise clock generation, such as:
- Telecommunications and wireless infrastructure
- High-speed data acquisition and test equipment
- Medical imaging and diagnostic equipment
- Aerospace and defense systems
- High-performance computing and networking
Q & A
- What type of PLL does the AD9552BCPZ use?
The AD9552BCPZ uses a fractional-N phase-locked loop (PLL). - What are the output driver options for the AD9552BCPZ?
The output drivers can be configured as either LVDS or LVPECL, with adjustable drive strength. - How is the AD9552BCPZ programmed?
The device is programmed via a 3-wire SPI interface. - What is the purpose of the PLL locked indicator?
The PLL locked indicator provides a status signal indicating whether the PLL is locked to the reference frequency. - How does the VCO calibration work?
The VCO calibration is automatic at power-up and can use either the crystal oscillator or an external reference input. - What is the package type of the AD9552BCPZ?
The package type is 32-WFQFN Exposed Pad, CSP. - Is the AD9552BCPZ RoHS compliant?
Yes, the AD9552BCPZ is ROHS3 compliant. - Can the output drivers be powered down independently?
Yes, the output drivers can be powered down independently using the power-down bit in the driver control registers. - What is the significance of the internal power-on reset circuit?
The internal power-on reset circuit ensures that the device initializes properly and performs VCO calibration at power-up. - How long should one wait for VCO calibration to complete after power-up?
It is recommended to wait at least 3 ms for the VCO calibration routine to finish before programming the VCO control register.
