Analog Devices Inc. AD9518-1BCPZ-REEL7

Overview

AD9518-1BCPZ-REEL7 from Analog Devices is a 6-output, low-jitter clock generator with integrated 2.3–2.65 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 AD9518-1BCPZ-REEL7 datasheet, AD9518-1BCPZ-REEL7 pinout, AD9518-1BCPZ-REEL7 application, or AD9518-1BCPZ-REEL7 equivalent, key selection criteria include internal VCO tuning range (2.3–2.65 GHz), LVPECL output frequency limit (1.6 GHz), additive jitter (225 fs rms), power supply configuration (3.3 V core, 2.5–3.3 V LVPECL, optional 5 V VCP), and synchronization capability across all six outputs.

Technical Context

The AD9518-1BCPZ-REEL7 implements a PLL-based architecture with a fully integrated VCO (2.30–2.65 GHz) and supports external VCO/VCXO up to 2.4 GHz. Its phase-frequency detector operates at up to 100 MHz with programmable antibacklash pulse widths (1.3–6.0 ns), and its charge pump delivers programmable sink/source current (0.6–4.8 mA) via CPRSET resistor.

Each of the three LVPECL output pairs features independent 1-to-32 dividers with coarse phase delay control, enabling precise frequency translation and alignment. Automatic power-up synchronization ensures deterministic output phase relationships without external intervention.

Key Specifications

Pinout & Package

The AD9518-1BCPZ-REEL7 is housed in a 48-lead LFCSP (Lead Frame Chip Scale Package) with an exposed thermal pad. Pin assignments follow the functional block diagram and are validated per Analog Devices' AD9518-1 Rev. C datasheet, Figure 14 (Pin Configuration).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9518-1BCPZ-REEL7, AD9516-1 offers reduced output count and reference flexibility at lower cost, while AD9520-0 trades the integrated VCO for EEPROM-configurable startup and higher output density-making AD9518-1 the optimal choice for VCO-based, six-output, low-jitter clock synthesis with reference redundancy.

Availability

AD9518-1BCPZ-REEL7 is available at Aetrix Electronics and suitable for 10/40/100 GbE networking line cards, high-speed data converter timing, wireless transceiver LO support, and ATE instrumentation requiring stable component supply and long-term lifecycle assurance.

Supply support for AD9518-1BCPZ-REEL7 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 generation and distribution ICs optimized for high-speed data converters, optical networking, and precision instrumentation applications demanding sub-picosecond timing fidelity.

FAQ

What is the maximum LVPECL output frequency supported by the AD9518-1BCPZ-REEL7?

The AD9518-1BCPZ-REEL7 supports LVPECL output frequencies up to 1.6 GHz, as specified in the "CLOCK OUTPUTS" section of the Rev. C datasheet. This limit applies to each of the six LVPECL outputs (OUT0–OUT5) and is validated under standard operating conditions (VS = 3.3 V, TA = 25°C). Operation beyond 1.6 GHz is not guaranteed and may degrade jitter or amplitude performance.

Does the AD9518-1BCPZ-REEL7 include an integrated VCO, and what is its tuning range?

Yes, the AD9518-1BCPZ-REEL7 integrates a voltage-controlled oscillator with a guaranteed tuning range of 2.30 GHz to 2.65 GHz, as confirmed in Table 2 ("PLL Characteristics") of the Rev. C datasheet. The VCO gain (KVCO) is typically 50 MHz/V, and tuning voltage must remain within 0.5 V to VCP − 0.5 V to avoid increased spurs.

How many LVPECL outputs does the AD9518-1BCPZ-REEL7 provide, and how are they organized?

The AD9518-1BCPZ-REEL7 provides six LVPECL outputs (OUT0 through OUT5), grouped into three differential pairs: (OUT0/OUT1), (OUT2/OUT3), and (OUT4/OUT5). Each pair shares a 1-to-32 divider and coarse phase delay control register, enabling independent frequency division and alignment per pair.

What is the additive jitter specification for the AD9518-1BCPZ-REEL7, and under what conditions is it measured?

The AD9518-1BCPZ-REEL7 has an additive output jitter of 225 fs rms, measured in distribution-only mode (VCO divider bypassed), as stated in the "FEATURES" section and Table 11 of the Rev. C datasheet. This value reflects jitter added solely by the clock distribution path-not including PLL or VCO contributions-and is verified with CLK = 622.08 MHz, LVPECL = 622.08 MHz, and divider = 1.

Can the AD9518-1BCPZ-REEL7 operate with both differential and single-ended reference inputs?

Yes, the AD9518-1BCPZ-REEL7 supports both configurations: a differential reference input (REFIN/REFIN) accepting LVPECL, LVDS, or CMOS up to 250 MHz, and two single-ended CMOS-compatible inputs (REF1, REF2) with logic thresholds of 0.8 V (low) and 2.0 V (high). The device includes reference monitoring and automatic/manual switchover between these inputs.