ADCLK950BCPZ

Clock Buffers, Drivers Overview

The ADCLK950BCPZ is a high-performance clock fanout buffer fabricated on Analog Devices' proprietary XFCB3 silicon germanium (SiGe) bipolar process. It features two selectable differential inputs and ten full-swing LVPECL outputs, designed for applications requiring low jitter and high speed. The device operates at frequencies up to 4.8 GHz with a broadband random jitter of 75 fs rms. It accepts various input formats including CML, CMOS, LVDS, and LVPECL via internal 100 Ω terminations. Powered by a single 3.3 V supply (2.97 V to 3.63 V range), it is housed in a 40-lead LFCSP package and specified for operation from -40°C to +85°C.

Clock Buffers, Drivers Feature Summary

• Two selectable differential inputs (CLK0/CLK1) with on-chip 100 Ω center-tapped termination resistors.
• Ten LVPECL output drivers capable of directly driving 800 mV into 50 Ω loads.
• Maximum operating frequency of 4.8 GHz with 75 fs rms broadband random jitter.
• Supports multiple input signal types: DC-coupled LVPECL, CML, 3.3 V CMOS, and AC-coupled 1.8 V CMOS, LVDS.

Clock Buffers, Drivers Applications

• Low jitter clock distribution networks
• Clock and data signal restoration
• Level translation between different logic families
• Wireless and wired communications systems
• Medical and industrial imaging equipment

Clock Buffers, Drivers Procurement Notes

Verify the specific ordering suffix when purchasing. The ADCLK950BCPZ denotes the standard tray-packaged component, while the ADCLK950BCPZ-REEL7 variant indicates reel packaging. Both share identical electrical specifications and functionality. Confirm RoHS compliance status as indicated by the Z suffix in the part number. Ensure procurement channels provide valid datasheet revisions (Rev. B or later) for accurate pinout and thermal data.

Clock Buffers, Drivers Selection Notes

Select this component for designs requiring ultra-low jitter clock distribution with high fan-out capabilities. The SiGe process ensures fast switching speeds suitable for frequencies up to 4.8 GHz. Designers must account for the 3.3 V power supply requirement and ensure proper PCB layout for thermal dissipation through the exposed paddle. Verify that the input source slew rate exceeds 4 V/ns to maintain optimal jitter performance. Consider the 40-LFCSP package size for space-constrained high-speed layouts.

Clock Buffers, Drivers Part Context

The ADCLK950 belongs to the ADCLK95x series of SiGe clock buffers from Analog Devices. It serves as a high-speed fanout solution within the broader portfolio of clock and timer ICs. Similar devices in the family include the ADCLK948 (8 outputs) and ADCLK954 (12 outputs). The ADCLK950 specifically bridges the gap between lower fan-out buffers and higher channel counts, offering a 2:10 ratio configuration optimized for balanced performance and jitter characteristics.

Clock Buffers, Drivers Replacement Considerations

Direct functional substitutes within the same manufacturer's lineup include the ADCLK948 for 8-output requirements and the ADCLK954 for 12-output configurations. These parts share similar SiGe technology and LVPECL output structures but differ in channel count. Cross-manufacturer replacements require careful evaluation of input/output voltage levels, jitter specifications, and package compatibility.