AD9540BCPZ

Overview

The AD9540BCPZ is a low jitter clock generator manufactured by Analog Devices Inc., housed in a 48-lead LFCSP package. It supports a maximum output frequency of 655 MHz and operates with a digital supply voltage range of 1.71 V to 1.89 V. The device features a 200 MHz phase frequency detector, an internal DDS clock speed of 400 MSPS, and a 48-bit frequency tuning word resolution. It includes a CML-mode PECL-compliant output driver with programmable slew rates and supports external VCO rates up to 2.7 GHz.

Feature Summary

• Features a flexible 200 MHz phase frequency detector with digitally controlled charge pump current up to 4 mA.
• Includes an internal Direct Digital Synthesizer (DDS) with 400 MSPS clock speed and 48-bit frequency tuning word resolution.
• Provides a 655 MHz CML-mode, PECL-compliant output driver with programmable slew rates.
• Supports 8 programmable phase/frequency profiles and 14-bit programmable phase offset.

Applications

• Clocking high performance data converters
• Base station clocking applications
• Network (SONET/SDH) clocking
• Gigabit Ethernet (GbE) clocking
• Automotive radar systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging details. Ensure that the component meets RoHS compliance requirements for the intended application environment. Cross-reference the datasheet revision to confirm pinout consistency, as updates may affect thermal pad connections or serial interface configurations.

Selection Notes

Select this component when stringent clocking requirements for high-performance data converters are necessary. The device supports external VCO frequencies up to 2.7 GHz and offers extremely fine tuning resolution with steps less than 2.33 μHz. Consider the 48-lead LFCSP_VQ package constraints and the requirement for separate 1.8 V analog/digital and 3.3 V I/O supplies during circuit design.

Part Context

The AD9540BCPZ belongs to the AD9540 series of clock generators from Analog Devices. It is specifically engineered to address the demanding clocking needs of the highest performance data converters. The 'BCPZ' designation indicates the commercial temperature grade (-40°C to +85°C) and lead-free packaging compliant with environmental standards.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.

FAQ

What is the maximum toggle rate of the CML output driver?

The maximum toggle rate of the CML output driver is 655 MHz.

How many programmable phase/frequency profiles does the AD9540 support?

The AD9540 supports 8 programmable phase/frequency profiles.

What is the resolution of the frequency tuning word in the internal DDS?

The internal DDS provides a 48-bit frequency tuning word resolution.