ADF4153A是一款小数N分频频率合成器，用来在无线接收机和发射机的上变频和下变频部分实现本振。它由低噪声数字鉴频鉴相器(PFD)、精密电荷泵和可编程参考分频器组成。该器件内置一个Σ-Δ型小数插值器，能够实现可编程模数小数N分频。INT、FRAC和MOD寄存器可构成一个总N分频器(N = (INT + (FRAC/MOD)))。此外，4位参考分频器（R分频器）允许PFD输入端的REFIN频率为可选值。如果频率合成器与外部环路滤波器和电压控制振荡器(VCO)一起使用，则可以实现完整的锁相环(PLL)。

简单的三线式接口控制所有片内寄存器。该器件采用2.7 V至3.3 V电源供电，不用时可以关断。

应用

The ADF4153A evaluation board is designed to allow the user to evaluate the performance of the ADF4153A frequency synthesizer for phase-locked loops (PLLs). The board contains the ADF4153A synthesizer, an edge mounted SMA connector for the RF output signal, power supply connectors, a temperature compensated reference oscillator (TCXO) of 25 MHz frequency, and an SDP connector. There is also a loop filter (50 kHz) and a VCO (Mini-Circuits ROS-1800+) on board.

This evaluation board requires an SDP Controller Board for connection to the PC. The SDP Controller Board connects to the PC via USB 2.0. The evaluation board will connect to the SDP controller board. The evaluation board cannot be connected directly to the PC. The evaluation software running on the PC will communicate through the SDP Controller Board to the evaluation board. The SDP Controller Board is a separate list item in the ordering guide below (EVAL-SDP-CS1Z). If you have not previously purchased an SDP Controller Board, please do so to ensure a full evaluation setup.

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