ADCLK854BCPZ-REEL7

Clock Buffers, Drivers Overview

The ADCLK854BCPZ-REEL7 is a low-power clock fanout buffer manufactured by Analog Devices Inc. It features two selectable differential inputs and up to 24 single-ended CMOS or 12 LVDS outputs, configurable via three control pins. The device operates on a 1.8 V ± 5% power supply (1.71 V to 1.89 V) within an industrial temperature range of -40°C to +85°C. It supports input frequencies up to 1.2 GHz for LVDS and 250 MHz for CMOS. Key electrical specifications include a maximum propagation delay of 2.7 ns for LVDS and 4.2 ns for CMOS, with integrated jitter of 54 fs rms (12 kHz to 20 MHz). The component is housed in a 48-pin LFCSP package.

Clock Buffers, Drivers Feature Summary

• Configurable output architecture supporting up to 12 LVDS (1.2 GHz) or 24 CMOS (250 MHz) channels.
• Low power consumption with less than 12 mW per channel at 100 MHz operation.
• High-performance timing characteristics including 54 fs rms integrated jitter and 70 ps output-to-output skew for LVDS.
• Dual differential inputs accepting CML, CMOS, HSTL, LVDS, and LVPECL logic levels.

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 against the manufacturer's current documentation to confirm packaging details. The REEL7 suffix indicates tape and reel packaging, which differs from tray packaging options available for other variants. Ensure compatibility with surface mount assembly processes suitable for the 48-LFCSP-VQ package dimensions.

Clock Buffers, Drivers Selection Notes

Select this component when a low-jitter fanout buffer is required for high-speed digital interfaces. The choice between LVDS and CMOS outputs depends on the receiver requirements and board layout constraints. Consider the 1.8 V supply voltage requirement and ensure adequate decoupling capacitance near the VS pins to maintain signal integrity and minimize phase noise.

Clock Buffers, Drivers Part Context

This part belongs to the ADCLK854 series of clock buffers. It is distinct from higher-frequency models like the ADCLK954, which supports up to 4.8 GHz. The ADCLK854 is optimized for applications requiring flexible logic level conversion and low power dissipation rather than extreme frequency multiplication or generation capabilities.

Clock Buffers, Drivers Replacement Considerations

Direct pin-compatible replacements are not explicitly listed in the provided documentation. Designers should evaluate alternative Analog Devices clock buffers such as the ADCLK853 or ADCLK855, ensuring that input/output configurations, supply voltages, and thermal performance meet the original design specifications.

Clock Buffers, Drivers FAQ

How are the LVDS and CMOS outputs configured?

The outputs are grouped into three banks of four. Control pins CTRL_A, CTRL_B, and CTRL_C determine whether each bank operates as LVDS or CMOS. A logic low selects LVDS, while a logic high selects CMOS.

What is the function of the SLEEP pin?

The SLEEP pin enables a power-down mode. When pulled high, it places the outputs in a high-Z state and powers down the internal circuitry, except for the internal bandgap reference.

Can the device accept single-ended inputs?

Yes, single-ended inputs can be accommodated by AC or DC coupling to one side of the differential input pair, while the complementary input is bypassed to ground with a capacitor.