Analog Devices Inc. AD9518-0ABCPZ-RL7

Overview

AD9518-0ABCPZ-RL7 from Analog Devices is a 6-output, low-jitter clock generator with integrated 2.55–2.95 GHz VCO, three LVPECL output pairs operating up to 1.6 GHz, 225 fs rms additive jitter, and channel-to-channel skew <10 ps. It serves as a precision clock distribution and synthesis IC in high-speed data converter timing systems.

For engineers reviewing the AD9518-0ABCPZ-RL7 datasheet, AD9518-0ABCPZ-RL7 pinout, AD9518-0ABCPZ-RL7 application, or AD9518-0ABCPZ-RL7 equivalent, key selection criteria include on-chip VCO tuning range (2.55–2.95 GHz), LVPECL output frequency limit (1.6 GHz), additive jitter performance (225 fs rms), and 48-lead LFCSP package compatibility with industrial temperature operation (−40°C to +85°C).

Technical Context

The AD9518-0ABCPZ-RL7 implements a PLL-based architecture with a fully integrated VCO and three independent divider-and-phase-delay blocks-one per LVPECL output pair-each supporting programmable division from 1 to 32 and coarse phase adjustment. Its reference input accepts LVPECL, LVDS, or CMOS signals up to 250 MHz with automatic switchover and holdover modes.

It features dual reference inputs (differential REFIN/REFIN or single-ended REF1/REF2), digital or analog lock detect, and serial control via a 3-wire SPI-compatible port. The device operates from a single 3.3 V supply, with separate 2.5–3.3 V LVPECL output rails and optional 5 V charge pump supply for external VCO support.

Key Specifications

Pinout & Package

The AD9518-0ABCPZ-RL7 is housed in a 48-lead, 7 mm × 7 mm LFCSP package with exposed thermal paddle (CP-48-9). Pin functions are defined per Analog Devices' Rev. D datasheet, Figure 4 and Table 19.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9518-0ABCPZ-RL7, AD9516-0BCPZ-REEL7 reduces output count and reference flexibility while retaining identical VCO performance and jitter; AD9520-0BCPZ-REEL7 trades integrated VCO capability for nonvolatile configuration and broader output format support-making it better suited for crystal-based, multi-rail timing systems.

Availability

AD9518-0ABCPZ-RL7 is available at Aetrix Electronics and suitable for 100G networking line cards, high-speed data converter timing, wireless baseband units, ATE instrumentation, and forward error correction systems requiring stable component supply and long-term lifecycle assurance.

Supply support for AD9518-0ABCPZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and industrial markets since 1965.

The AD9518 family targets ultra-low-jitter clock generation and distribution for data converters, SerDes, and RF sampling systems-designed specifically to maximize dynamic range and spectral purity in demanding signal chain applications.

FAQ

What is the maximum LVPECL output frequency supported by the AD9518-0ABCPZ-RL7?

The AD9518-0ABCPZ-RL7 supports LVPECL output frequencies up to 1.6 GHz, as confirmed in the "Clock Outputs" section of the Rev. D datasheet (Table 4). This limit applies to all six outputs (OUT0–OUT5) and is maintained across the full industrial temperature range (−40°C to +85°C) with proper 50 Ω termination to VS_LVPECL − 2 V. Operation beyond 1.6 GHz requires external amplification or level translation.

Does the AD9518-0ABCPZ-RL7 include an integrated VCO, and what is its tuning range?

Yes, the AD9518-0ABCPZ-RL7 integrates a voltage-controlled oscillator with a guaranteed tuning range of 2.55 GHz to 2.95 GHz, specified over temperature and process variation (Rev. D datasheet, Table 2). This on-chip VCO eliminates the need for external tuning components and supports direct synthesis of high-frequency sampling clocks used in 5G, radar, and high-speed data acquisition systems.

How many differential LVPECL outputs does the AD9518-0ABCPZ-RL7 provide, and how are they organized?

The AD9518-0ABCPZ-RL7 provides six differential LVPECL outputs arranged in three independent pairs: OUT0/OUT1, OUT2/OUT3, and OUT4/OUT5. Each pair shares a dedicated 1-to-32 divider with coarse phase delay control, enabling synchronized yet independently configurable clock domains-critical for I/Q signal paths, time-interleaved ADCs, and multi-lane SerDes applications.

What is the typical additive jitter performance of the AD9518-0ABCPZ-RL7 in clock distribution mode?

In clock distribution mode (VCO bypassed), the AD9518-0ABCPZ-RL7 achieves 225 fs rms additive jitter, as measured across the LVPECL output path alone (Rev. D datasheet, Features section and Table 11). This value reflects pure distribution-stage noise-excluding PLL and VCO contributions-and is validated at 1 GHz input/output with 1 V/ns slew rate, making it suitable for jitter-sensitive data converter interfaces.

Is the AD9518-0ABCPZ-RL7 compatible with both differential and single-ended reference inputs?

Yes, the AD9518-0ABCPZ-RL7 accepts reference inputs in two configurations: (1) differential mode via REFIN/REFIN pins (supporting LVPECL/LVDS up to 250 MHz), or (2) dual single-ended mode via REF1/REF2 pins (CMOS-compatible, 0–250 MHz). Both modes support reference monitoring, automatic switchover, and holdover-enabling robust timing in carrier-grade and mission-critical systems.