MAX2870ETJ+T
Overview
The MAX2870 is an ultra-wideband phase-locked loop (PLL) with an integrated voltage-controlled oscillator (VCO) capable of operating in both integer-N and fractional-N modes. It features a fundamental VCO frequency range of 3000MHz to 6000MHz, which is extended down to 23.5MHz using internal output dividers and buffers. This high-performance frequency synthesizer is designed for demanding RF applications requiring low phase noise and flexible frequency generation.
Why Choose This Part
The device offers exceptional flexibility by supporting both integer and fractional modes with a high-performance PFD and a reference frequency up to 200MHz. It includes dual programmable outputs and manual or automatic VCO selection to optimize phase noise across its wide operating range. Additionally, the chip is compatible with 1.8V control logic and features a low-power shutdown mode, drawing as little as 1uA.
Applications
Getting Started
Designers typically use the MAX2870EVKIT evaluation board to verify performance and configure internal registers via a PC-based GUI. The device is controlled through a standard 3-wire SPI interface for programming frequency and power settings. Proper PCB layout with attention to the thermal pad and RF grounding is critical for achieving the specified phase noise performance.
