ADCLK846BCPZ

Clock Buffers, Drivers Overview

The ADCLK846BCPZ is a low power clock fanout buffer featuring selectable LVDS and CMOS outputs. It supports up to 6 LVDS outputs at 1.2 GHz or 12 CMOS outputs at 250 MHz. The device accepts various input logic levels including CML, CMOS, HSTL, LVDS, and LVPECL. Powered by a 1.71 V to 1.89 V supply, it operates within an industrial temperature range of -40°C to +85°C. Key performance metrics include 54 fs integrated jitter (12 kHz to 20 MHz) and 100 fs additive broadband jitter. The component is housed in a 24-pin LFCSP package with an exposed paddle for thermal management.

Clock Buffers, Drivers Feature Summary

• Configurable output architecture supporting up to 6 LVDS (1.2 GHz) or 12 CMOS (250 MHz) channels via pin-programmable CTRL_A and CTRL_B lines.
• Low jitter performance with 54 fs integrated random jitter (12 kHz to 20 MHz) and 100 fs additive broadband jitter.
• Versatile input compatibility accepting differential or single-ended signals from CML, CMOS, HSTL, LVDS, and LVPECL sources.
• Integrated sleep mode controlled by the SLEEP pin to minimize power consumption when not in use.

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 type, such as reel versus tray, as these designations affect shipping units but do not alter the internal circuit function. Ensure compliance with RoHS directives and check for any product change notifications that may impact long-term availability or material composition.

Clock Buffers, Drivers Selection Notes

Select this component when a combination of LVDS and CMOS outputs is required from a single source. Verify that the input signal slew rate exceeds 1 V/ns to maintain optimal jitter performance. For PCB layout, ensure the exposed paddle is connected to ground through a grid of vias to facilitate heat dissipation, as thermal resistance impacts junction temperature calculations.

Clock Buffers, Drivers Part Context

The ADCLK846 belongs to Analog Devices' family of low power clock buffers. It is designed to replace older buffering solutions where mixed logic level distribution was necessary. The device integrates both LVDS and CMOS drivers on a single die, allowing designers to optimize trace impedance and noise immunity across different sections of a system board without requiring multiple buffer ICs.

Clock Buffers, Drivers Replacement Considerations

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

Clock Buffers, Drivers FAQ

How are the LVDS and CMOS outputs configured?

The outputs are configured using two control pins, CTRL_A and CTRL_B. Setting these pins high enables CMOS outputs, while setting them low enables LVDS outputs for their respective output banks.

What is the maximum operating frequency for the CMOS outputs?

The maximum operating frequency for the CMOS outputs is 250 MHz, whereas the LVDS outputs support frequencies up to 1.2 GHz.

Can the device accept single-ended inputs?

Yes, the ADCLK846 can accept single-ended inputs. This is achieved by AC or DC coupling the signal to one side of the differential input pair while bypassing the other input to ground.