Features and Benefits

  • Simple power connection using USB connection and on-board LDO voltage regulators
  • LDOs are easily bypassed for power measurements
  • AC-coupled differential LVPECL SMA connectors
  • SMA connectors for
    • 1 reference input
    • 1 PLL lock detect output
  • Microsoft Windows®–based evaluation software with simple graphical user interface
  • On-board PLL loop filter
  • Easy access to digital I/O and diagnostic signals via I/O header
  • Status LEDs for diagnostic signals
  • USB computer interface
  • Dip switch configurable for manual operation
  • Software calculator provides flexibility, allowing programming almost any rational input/output frequency ratio

Product Details

The AD9552 evaluation board is a compact, easy to use platform for evaluating all features of the AD9552 oscillator frequency upconverter.

The AD9552 is a fractional-N phase-locked loop (PLL) based clock generator designed specifically to replace high frequency crystal oscillators and resonators. The device employs a sigmadelta (Σ-Δ) modulator (SDM) to accommodate fractional frequency synthesis. The user supplies an input reference signal by connecting a single-ended clock signal directly to the REF pin or by connecting a crystal resonator across the XTAL pins.

The AD9552 is pin programmable, providing one of 64 standard output frequencies based on one of eight standard input frequencies. The device also has a 3-wire SPI interface, enabling the user to program custom input-to-output frequency ratios.

The AD9552 relies on an external capacitor to complete the loop filter of the PLL. The output is compatible with LVPECL, LVDS, or single-ended CMOS logic levels, although the AD9552 is implemented in a strictly CMOS process.


Evaluation Software

3.95 M
AD9551/AD9552 Evaluation Software (Rev. 2.1.0)
This installer contains USB drivers that are both 32- and 64-bit compatible. Note: Older AD9551/2 evaluation boards will need to have the USB controller EEPROM re-flashed in order to use this driver.
1.19 K
AD9552 Evaluation Board USB Flash Programmer Readme
EVB flash readme: This file contains instructions for re-flashing the USB controller on an older eval board so that the evaluation board is compatible with the newer 64-bit USB driver. The USB driver is also 32-bit compatible.
7.35 M
Evaluation Board USB Flash Programmer
Contains the EXE file for re-flashing the USB EEPROM.