Analog Devices Inc. AD9518-2ABCPZ-RL7

Overview

AD9518-2ABCPZ-RL7 from Analog Devices is a 6-output clock generator with integrated 2.2 GHz VCO, designed for ultra-low-jitter clock distribution in high-speed data converters and networking systems. It delivers six LVPECL outputs (three pairs), each supporting up to 1.6 GHz output frequency, 1-to-32 programmable division, and coarse phase delay. Its on-chip VCO tunes from 2.05 GHz to 2.33 GHz and achieves 225 fs rms additive jitter.

For engineers reviewing the AD9518-2ABCPZ-RL7 datasheet, AD9518-2ABCPZ-RL7 pinout, AD9518-2ABCPZ-RL7 application, or AD9518-2ABCPZ-RL7 equivalent, key selection criteria include sub-picosecond jitter performance, channel-to-channel skew <10 ps, support for dual reference inputs (LVPECL/LVDS/CMOS), digital/analog lock detect, and automatic power-up synchronization of all outputs.

Technical Context

The AD9518-2ABCPZ-RL7 integrates a low-noise PLL with a 2.05–2.33 GHz on-chip VCO and three independent LVPECL output pairs, each with dedicated 1-to-32 dividers and coarse phase delay registers. The PFD supports up to 100 MHz input with selectable antibacklash pulse widths (1.3/2.9/6.0 ns) and digital lock detect window configurable between 3.5 ns and 15 ns.

It accepts differential or dual single-ended reference inputs up to 250 MHz, supports external VCO/VCXO up to 2.4 GHz, and features serial control port (SPI-compatible) for full register configuration. Power architecture includes separate 3.3 V core supply, 2.5–3.3 V LVPECL supply, and optional 5 V charge pump supply for external VCO biasing.

Key Specifications

Pinout & Package

The AD9518-2ABCPZ-RL7 is housed in a 48-lead LFCSP (7 mm × 7 mm, 0.85 mm height) with exposed paddle for thermal management. Pin functions are defined per Analog Devices AD9518-2 Rev. C datasheet, Pages 14–15.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar clock generator applications.

Compared with AD9516-2BCPZ-REEL7, AD9518-2ABCPZ-RL7 provides dual-reference flexibility essential for telecom failover; compared with AD9522-1BCPZ-REEL7, it offers smaller footprint and lower power for fixed-configuration, VCO-centric clock trees where crystal start-up and EEPROM are not needed.

Availability

AD9518-2ABCPZ-RL7 is available at Aetrix Electronics and suitable for 10/40/100 GbE networking line cards, high-speed data converter clocking, and wireless transceiver timing applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for AD9518-2ABCPZ-RL7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The AD9518 product line delivers ultra-low-jitter clock distribution ICs optimized for data converter timing, high-speed serial interfaces, and precision instrumentation where phase noise and deterministic skew directly impact system-level SNR and BER.

FAQ

What is the maximum supported output frequency of the AD9518-2ABCPZ-RL7?

The AD9518-2ABCPZ-RL7 supports a maximum LVPECL output frequency of 1.6 GHz per output pair. This specification applies when using the internal VCO or external clock sources routed through the distribution path. The device achieves this while maintaining 225 fs rms additive jitter and <10 ps channel-to-channel skew for paired outputs, making it suitable for driving high-speed SerDes and RF sampling ADCs.

Does the AD9518-2ABCPZ-RL7 support dual reference inputs?

Yes, the AD9518-2ABCPZ-RL7 supports both differential (REFIN/REFIN) and dual single-ended (REF1/REF2) reference inputs. It includes built-in reference monitoring, automatic revertive switchover, and manual holdover modes-enabling robust clock redundancy in telecom and mission-critical instrumentation systems without external logic.

What package type and thermal characteristics does the AD9518-2ABCPZ-RL7 use?

The AD9518-2ABCPZ-RL7 uses a 48-lead LFCSP package (7 mm × 7 mm, 0.85 mm height) with exposed thermal paddle. Per Analog Devices Rev. C datasheet, its θ_JA is 36.5°C/W and θ_JC is 5.5°C/W, enabling reliable operation at full load over the industrial temperature range (−40°C to +85°C) with standard PCB copper pour.

Can the AD9518-2ABCPZ-RL7 be used with an external VCO?

Yes, the AD9518-2ABCPZ-RL7 supports external VCO/VCXO operation up to 2.4 GHz via the CLK input. When using an external VCO, the internal VCO is disabled, and the charge pump supply (VCP) can be set to 5 V to accommodate extended tuning voltage ranges. This mode retains full divider, phase delay, and synchronization functionality.

How does the AD9518-2ABCPZ-RL7 achieve automatic synchronization of outputs on power-up?

The AD9518-2ABCPZ-RL7 performs automatic synchronization of all six LVPECL outputs during power-up initialization by aligning internal divider states and resetting phase accumulators. This deterministic behavior is hardware-enforced and requires no SPI configuration, ensuring repeatable phase relationships across power cycles-critical for multi-channel coherent systems like phased-array radios and synchronized ADC arrays.