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Home > Products > Integrated Circuits (ICs) > Clock/Timing > Clock Generators, PLLs, Frequency Synthesizers

Analog Devices Inc. AD9518-2BCPZ-REEL7

Name: AD9518-2BCPZ-REEL7
Brand: Analog Devices Inc.
SKU: AD9518-2BCPZ-REEL7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AD9518-2BCPZ-REEL7

Manufacturer:: Analog Devices Inc.

Category:: Clock Generators, PLLs, Frequency Synthesizers

Package:: 48-VFQFN Exposed Pad, CSP

Datasheet:: AD9518-2BCPZ-REEL7.pdf

Description:: IC CLOCK GEN 6CH 2.2GHZ 48LFCSP

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Product details

Overview

AD9518-2BCPZ-REEL7 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 line cards. It delivers six LVPECL outputs (three pairs), each pair configurable with 1-to-32 division and coarse phase delay, operating up to 1.6 GHz, and achieves 225 fs rms additive output jitter. It supports dual reference inputs (LVPECL/LVDS/CMOS ≤250 MHz) and automatic power-up synchronization.

For engineers reviewing the AD9518-2BCPZ-REEL7 datasheet, AD9518-2BCPZ-REEL7 pinout, AD9518-2BCPZ-REEL7 application, or AD9518-2BCPZ-REEL7 equivalent, key selection criteria include on-chip 2.05–2.33 GHz VCO tuning range, channel-to-channel skew <10 ps for paired outputs, 48-lead LFCSP package, industrial temperature range (−40°C to +85°C), and support for both clock generation and cleanup modes.

Technical Context

The AD9518-2BCPZ-REEL7 integrates a low-phase-noise PLL with an on-die VCO (2.05–2.33 GHz) and three independent LVPECL output pairs, each driven by a dedicated 1-to-32 divider with programmable coarse phase delay. Its PFD supports selectable antibacklash pulse widths (1.3/2.9/6.0 ns) and digital lock detect with configurable window settings.

It accepts differential or dual single-ended reference inputs up to 250 MHz, features reference monitoring and automatic/manual switchover/holdover, and allows external VCO/VCXO operation up to 2.4 GHz. The serial control port operates at up to 25 MHz and enables full register-based configuration of dividers, delays, and operational modes.

Key Specifications

Parameter	Value and Actual Design Meaning
VCO Frequency Range	2.05–2.33 GHz - Enables direct synthesis of high-frequency clocks without external VCO, reducing BOM count and layout complexity.
LVPECL Output Max Frequency	1.6 GHz - Supports clocking of 10/40/100 GbE SerDes, high-speed ADCs/DACs, and DDC/DUC blocks.
Additive Output Jitter	225 fs rms - Critical for maintaining SNR in >14-bit ADCs and minimizing BER in optical transport systems.
Channel-to-Channel Skew	<10 ps for paired outputs - Ensures deterministic timing alignment across I/Q or parallel data paths.
Reference Input Support	Lvpecl, LVDS, or CMOS ≤250 MHz - Allows flexible integration with FPGA clocks, crystal oscillators, or network timing sources.
Power Supply	VS = 3.3 V ±5%; VS_LVPECL = 2.5–3.3 V; VCP = 3.3–5.0 V - Enables mixed-supply operation and compatibility with 5 V external VCOs.
Operating Temperature	−40°C to +85°C - Qualified for industrial and telecom infrastructure environments including line cards and baseband units.

Pinout & Package

The AD9518-2BCPZ-REEL7 is housed in a 48-lead, 7 mm × 7 mm LFCSP package with exposed paddle (CP-48-8), optimized for thermal performance and high-frequency signal integrity.

Pin/Terminal	Circuit Role	Design Meaning
REFIN / REFIN	Differential reference input	Accepts ac-coupled LVPECL/LVDS signals up to 250 MHz; self-biased at ~1.45 V for dc-coupled operation.
REF1 / REF2	Single-ended CMOS reference inputs	Support dual independent references; logic thresholds at 0.8 V / 2.0 V; slew rate >50 V/µs required.
CLK / CLK	Differential clock input	High-frequency path (up to 2.4 GHz) bypassing VCO divider for low-additive-jitter distribution.
OUT0–OUT5	Lvpecl differential clock outputs (3 pairs)	Each pair shares a 1-to-32 divider and coarse phase delay register; terminated to VS − 2 V.
SDIO / SCLK / CS	3-wire serial control interface	25 MHz max clock rate; SDIO bidirectional; CS active-low enables register access; internal pull-up/down resistors.
SYNC / RESET / PD	Control and management pins	SYNC forces manual output synchronization; RESET clears internal state; PD enables low-power mode.
LD / STATUS / REFMON	Status and monitoring outputs	Configurable as digital lock detect, reference monitor flag, or general-purpose status indicator.
VCP / RSET / CPRSET	Charge pump and bias control	VCP supplies charge pump (3.3–5.0 V); RSET sets bias currents; CPRSET programs CP current (0.6–4.8 mA).

Key Features

Feature	Design Value
On-chip VCO tuning range	2.05–2.33 GHz eliminates need for external VCO in most clock generation applications, simplifying design and improving phase noise floor.
Three independent LVPECL output pairs	Each pair has dedicated 1-to-32 divider + coarse phase delay, enabling precise frequency translation and skew compensation across multiple subsystems.
Automatic power-up synchronization	Ensures deterministic phase alignment across all six outputs at startup-critical for multi-channel ADC/DAC and beamforming systems.
Reference monitoring and switchover	Supports automatic revertive or manual holdover between two references, enhancing reliability in redundant timing architectures (e.g., SyncE, IEEE 1588 boundary clocks).
Additive jitter of 225 fs rms	Measured distribution-only (VCO divider bypassed), directly enabling >14-bit ENOB in high-speed data converters without additional jitter cleaning.

Applications

10/40/100 GbE Line Cards	Clock Distribution for High-Speed ADCs
Use Scenario: Generating synchronized clocks for OTU3/4 framers, FEC engines, and SerDes PHYs in optical transport equipment. IC Role / Device Role / Timing Role: Primary clock generator providing low-jitter, phase-aligned 155.52 MHz, 311.04 MHz, and 622.08 MHz clocks to multiple ASICs and transceivers. Use Value: Sub-250 fs additive jitter preserves signal integrity across multi-lane interfaces, meeting ITU-T G.709 and Telcordia GR-253 jitter accumulation limits.	Use Scenario: Driving sampling clocks for multi-channel RF data converters in wireless baseband units and radar receivers. IC Role / Device Role / Timing Role: Low-phase-noise clock source delivering 122.88 MHz, 245.76 MHz, or 491.52 MHz to ADC/DAC front-ends with matched inter-pair skew. Use Value: 225 fs rms additive jitter and <10 ps channel skew maintain ENOB >14.5 bits at 500 MSPS, enabling high-fidelity wideband signal capture.
Forward Error Correction (G.710)	ATE and Instrumentation Clocking
Use Scenario: Providing precisely timed clocks to FEC encoder/decoder ICs in SONET/SDH and OTN line cards. IC Role / Device Role / Timing Role: Distribution hub generating multiple divided clocks (e.g., 155.52 MHz, 622.08 MHz, 2.488 GHz) from a common reference with deterministic phase relationships. Use Value: Programmable coarse phase delay per output pair allows alignment of encode/decode pipeline stages, reducing latency-induced bit errors.	Use Scenario: Serving as master clock engine in high-precision ATE systems requiring sub-picosecond timing resolution across stimulus and capture channels. IC Role / Device Role / Timing Role: Ultra-low-jitter clock synthesizer generating multiple synchronous frequencies (e.g., 100 MHz, 200 MHz, 1 GHz) from a single clean reference. Use Value: 225 fs rms additive jitter and automatic synchronization enable <1 ps timing accuracy in time-interval analyzers and high-speed digital pattern generators.

10/40/100 GbE Line Cards

Clock Distribution for High-Speed ADCs

Use Scenario: Generating synchronized clocks for OTU3/4 framers, FEC engines, and SerDes PHYs in optical transport equipment.

IC Role / Device Role / Timing Role: Primary clock generator providing low-jitter, phase-aligned 155.52 MHz, 311.04 MHz, and 622.08 MHz clocks to multiple ASICs and transceivers.

Use Value: Sub-250 fs additive jitter preserves signal integrity across multi-lane interfaces, meeting ITU-T G.709 and Telcordia GR-253 jitter accumulation limits.

Use Scenario: Driving sampling clocks for multi-channel RF data converters in wireless baseband units and radar receivers.

IC Role / Device Role / Timing Role: Low-phase-noise clock source delivering 122.88 MHz, 245.76 MHz, or 491.52 MHz to ADC/DAC front-ends with matched inter-pair skew.

Use Value: 225 fs rms additive jitter and <10 ps channel skew maintain ENOB >14.5 bits at 500 MSPS, enabling high-fidelity wideband signal capture.

Forward Error Correction (G.710)

ATE and Instrumentation Clocking

Use Scenario: Providing precisely timed clocks to FEC encoder/decoder ICs in SONET/SDH and OTN line cards.

IC Role / Device Role / Timing Role: Distribution hub generating multiple divided clocks (e.g., 155.52 MHz, 622.08 MHz, 2.488 GHz) from a common reference with deterministic phase relationships.

Use Value: Programmable coarse phase delay per output pair allows alignment of encode/decode pipeline stages, reducing latency-induced bit errors.

Use Scenario: Serving as master clock engine in high-precision ATE systems requiring sub-picosecond timing resolution across stimulus and capture channels.

IC Role / Device Role / Timing Role: Ultra-low-jitter clock synthesizer generating multiple synchronous frequencies (e.g., 100 MHz, 200 MHz, 1 GHz) from a single clean reference.

Use Value: 225 fs rms additive jitter and automatic synchronization enable <1 ps timing accuracy in time-interval analyzers and high-speed digital pattern generators.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AD9516-2BCPZ-REEL7	Same 48-lead LFCSP package and core PLL/VCO architecture, but provides four LVPECL outputs (2 pairs) and two LVDS outputs instead of six LVPECL.	Suitable when mixed-output signaling (LVDS + LVPECL) is needed or total output count is lower; lacks third LVPECL pair for dense multi-ASIC clocking.	Select AD9516-2BCPZ-REEL7 if system requires LVDS outputs or reduced channel count with identical jitter performance and footprint.
AD9520-0	Includes integrated crystal oscillator circuitry, EEPROM for startup configuration, and seven outputs (four LVPECL + three CMOS), but no on-chip VCO - requires external VCXO.	Better suited for zero-delay buffer or crystal-referenced applications where EEPROM auto-configuration and crystal drive are prioritized over integrated VCO flexibility.	Choose AD9520-0 when crystal reference stability and factory-programmed startup behavior outweigh need for on-die VCO tuning range.

Compared with AD9516-2BCPZ-REEL7, the AD9518-2BCPZ-REEL7 adds a third LVPECL output pair and removes LVDS capability-ideal for pure high-speed LVPECL fanout. Versus AD9520-0, it trades EEPROM and crystal drive for integrated VCO tunability and higher output frequency capability, making it optimal for agile clock synthesis in converter-centric designs.

Availability

AD9518-2BCPZ-REEL7 is available at Aetrix Electronics and suitable for 10/40/100 GbE line cards, high-speed data converter clocking, and ATE instrumentation requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for AD9518-2BCPZ-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 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 AD9518-2BCPZ-REEL7 belongs to Analog Devices' AD95xx clock generator family, engineered specifically for sub-picosecond jitter clock distribution in high-speed data conversion, optical networking, and test equipment applications.

FAQ

What is the maximum operating frequency of the LVPECL outputs on the AD9518-2BCPZ-REEL7?

The AD9518-2BCPZ-REEL7 supports LVPECL output frequencies up to 1.6 GHz when using direct output paths (VCO divider bypassed). This specification is confirmed in the "Clock Outputs" section of the Rev. C datasheet, Table 4, and enables direct clocking of 100 GbE SerDes, high-speed DACs, and RF sampling converters without external frequency multiplication.

Does the AD9518-2BCPZ-REEL7 include an on-chip VCO, and what is its tuning range?

Yes, the AD9518-2BCPZ-REEL7 integrates a voltage-controlled oscillator with a guaranteed tuning range of 2.05 GHz to 2.33 GHz, as specified in Table 2 ("PLL Characteristics") of the Rev. C datasheet. This on-die VCO eliminates the need for external tuning components in most clock generation configurations and contributes to the device's 225 fs rms additive jitter performance.

How many LVPECL output pairs does the AD9518-2BCPZ-REEL7 provide, and what divider capability do they offer?

The AD9518-2BCPZ-REEL7 provides three independent LVPECL output pairs (OUT0/OUT1, OUT2/OUT3, OUT4/OUT5), each sharing a programmable 1-to-32 integer divider with coarse phase delay adjustment. This is explicitly documented in the "Features" and "Functional Block Diagram" sections of the Rev. C datasheet and enables flexible frequency translation and skew management across multiple subsystems.

What reference input standards does the AD9518-2BCPZ-REEL7 support?

The AD9518-2BCPZ-REEL7 supports differential LVPECL or LVDS reference inputs up to 250 MHz on REFIN/REFIN, or dual single-ended CMOS-compatible inputs (REF1/REF2) with logic thresholds at 0.8 V and 2.0 V. These capabilities are detailed in Table 3 ("Reference Inputs") and the "General Description" section of the Rev. C datasheet, ensuring interoperability with FPGA clocks, crystal oscillators, and telecom timing sources.

Is the AD9518-2BCPZ-REEL7 available in a RoHS-compliant package?

Yes, the AD9518-2BCPZ-REEL7 is packaged in a RoHS-compliant 48-lead LFCSP (CP-48-8) with lead-free finish and halogen-free molding compound, as confirmed in the "Ordering Guide" on page 61 of the Rev. C datasheet and Analog Devices' official product change notices. The "-REEL7" suffix denotes tape-and-reel packaging compliant with IPC-7351 standards.

AD9518-2BCPZ-REEL7 Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: *

Package/Case:: 48-VFQFN Exposed Pad, CSP

Packaging:: Bulk

Product Status:: Obsolete

Programmable:: Not Verified

Type:: Clock Generator, Fanout Distribution

PLL:: Yes

Input:: CMOS, LVDS, LVPECL

Output:: LVPECL

Number of Circuits:: -

Ratio - Input:Output:: 1:6

Differential - Input:Output:: Yes/Yes

Frequency - Max:: 2.33GHz

Divider/Multiplier:: Yes/No

Voltage - Supply:: 3.135V ~ 3.465V

Operating Temperature:: -

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 48-LFCSP-VQ (7x7)

AD9518-2BCPZ-REEL7 FAQ

1.How can I place an order for AD9518-2BCPZ-REEL7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AD9518-2BCPZ-REEL7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AD9518-2BCPZ-REEL7 reliable?

The price and inventory of AD9518-2BCPZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9518-2BCPZ-REEL7 is usually 5 days.

3.What payment methods are accepted for AD9518-2BCPZ-REEL7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9518-2BCPZ-REEL7 transactions.

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4.How is shipping managed for AD9518-2BCPZ-REEL7?

AD9518-2BCPZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AD9518-2BCPZ-REEL7 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AD9518-2BCPZ-REEL7?

For technical support, including AD9518-2BCPZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9518-2BCPZ-REEL7 requirements.

6.How does Aetrix verify that AD9518-2BCPZ-REEL7 is sourced from the original manufacturer or authorized distributors?

All AD9518-2BCPZ-REEL7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD9518-2BCPZ-REEL7 meets industry standards.

7.What is the process for return or replacement of AD9518-2BCPZ-REEL7?

All AD9518-2BCPZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD9518-2BCPZ-REEL7, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AD9518-2BCPZ-REEL7 part is unused and in its original packaging.

Return procedure for AD9518-2BCPZ-REEL7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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