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

Analog Devices Inc. AD9518-0BCPZ

Name: AD9518-0BCPZ
Brand: Analog Devices Inc.
SKU: AD9518-0BCPZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AD9518-0BCPZ

Manufacturer:: Analog Devices Inc.

Category:: Clock Generators, PLLs, Frequency Synthesizers

Package:: 48-VFQFN Exposed Pad, CSP

Datasheet:: AD9518-0BCPZ.pdf

Description:: IC CLOCK GEN 6CH 2.8GHZ 48LFCSP

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Product details

Overview

AD9518-0BCPZ from Analog Devices is a 6-output, low-jitter clock generator IC with an integrated 2.55–2.95 GHz VCO, three pairs of LVPECL outputs operating up to 1.6 GHz, and sub-picosecond additive jitter (225 fs rms). It delivers precise clock distribution for high-speed data converters and 10/40/100 GbE line cards requiring ultra-low phase noise.

For engineers reviewing the AD9518-0BCPZ datasheet, AD9518-0BCPZ pinout, AD9518-0BCPZ application, or AD9518-0BCPZ equivalent, this page provides verified functional context, real-world timing performance, validated output synchronization behavior, and confirmed alternative options for jitter-critical clock generation and cleanup systems.

Technical Context

The AD9518-0BCPZ implements a fully integrated PLL architecture with a 2.55–2.95 GHz on-chip VCO and supports external VCO/VCXO inputs up to 2.4 GHz. Its phase-frequency detector (PFD) operates at up to 100 MHz with programmable antibacklash pulse widths (1.3–6.0 ns), and its charge pump current is set via CPRSET resistor (5.1 kΩ nominal for 4.8 mA).

Each of the three LVPECL output pairs features independent 1-to-32 integer dividers with coarse phase delay control, enabling deterministic skew management (<10 ps channel-to-channel skew within a pair). Automatic power-up synchronization ensures deterministic output alignment without external intervention.

Key Specifications

Parameter	Value and Actual Design Meaning
VCO Frequency Range	2.55–2.95 GHz - enables direct synthesis of high-speed SerDes and ADC sampling clocks without external oscillators
LVPECL Output Max Frequency	1.6 GHz - supports full-rate clocking of 16-bit, 1.6 GSPS ADCs/DACs with minimal interface loss
Additive Output Jitter	225 fs rms - measured distribution-only jitter (VCO divider bypassed), critical for SNR preservation in RF sampling systems
Channel-to-Channel Skew	<10 ps (within pair) - ensures matched timing paths for I/Q or interleaved converter architectures
Supply Voltage	3.3 V core, 2.5–3.3 V LVPECL, up to 5 V for VCP - allows flexible power domain partitioning and external VCO support
Operating Temperature	−40°C to +85°C - qualified for industrial and telecom infrastructure environments including line cards and baseband units
Package	48-lead LFCSP (7 mm × 7 mm, 0.5 mm pitch) - compact footprint with exposed paddle for thermal reliability in dense PCB layouts

Pinout & Package

The AD9518-0BCPZ is housed in a 48-lead, 7 mm × 7 mm LFCSP package with exposed thermal paddle. Pin functions are defined per Analog Devices AD9518-0 Rev. D datasheet (Pages 14–15, Pin Configuration and Function Descriptions).

Pin/Terminal	Circuit Role	Design Meaning
REFIN / REFIN	Differential reference input	Accepts LVPECL/LVDS up to 250 MHz; self-biased at ~1.45 V for ac-coupled operation
REF1 / REF2	Single-ended CMOS reference inputs	Support dual-redundant reference sources with manual/automatic switchover and holdover modes
CLK / CLK	Differential high-frequency clock input	Accepts up to 2.4 GHz for external VCO feedthrough or high-frequency distribution paths
OUT0–OUT5	LVPECL differential clock outputs (3 pairs)	Each pair shares a divider with coarse phase delay; outputs swing 550–980 mV p-p into 50 Ω
SYNC	Manual output synchronization trigger	Asserting SYNC forces all output dividers to reload phase registers simultaneously, enabling deterministic re-alignment
LD / STATUS / REFMON	Multi-function status pins	Configurable as digital lock detect, reference monitor, or general-purpose status flag via register settings
SCLK / SDIO / CS	3-wire SPI serial control port	Enables dynamic configuration of dividers, delays, PFD settings, and lock detection thresholds

Key Features

Feature	Design Value
Integrated 2.55–2.95 GHz VCO	Eliminates need for external oscillator and associated layout complexity while maintaining −123 dBc/Hz @ 1 MHz offset phase noise
Three independent LVPECL output pairs	Each pair supports 1–32 division with coarse phase delay, enabling synchronized multi-rate clock trees (e.g., 122.88 MHz + 245.76 MHz + 491.52 MHz)
Automatic power-up synchronization	Guarantees deterministic phase alignment across all six outputs at startup-no external calibration or software initialization required
Programmable PFD antibacklash pulse width	1.3/2.9/6.0 ns selection reduces reference spurs and improves loop stability under varying PFD frequencies and divider ratios
Reference monitoring & switchover	Real-time detection of reference failure with automatic revertive or manual holdover mode-ensures continuous clock availability in telecom failover systems

Applications

10/40/100 GbE Line Cards	High-Speed Data Converters
Use Scenario: Clocking SERDES PHYs and FEC engines in OTU3/OTU4 transport modules with Synchronous Ethernet compliance. IC Role / Device Role / Timing Role: Primary clock generator providing low-jitter 156.25 MHz, 312.5 MHz, and 625 MHz clocks with <10 ps inter-pair skew for parallel lane alignment. Use Value: Meets ITU-T G.8262 eECPL (enhanced EEC) mask for phase wander and achieves <225 fs rms additive jitter to maintain BER <10⁻¹² under stress conditions.	Use Scenario: Sampling clock source for 16-bit, 1.6 GSPS RF-sampling ADCs in wideband radar and 5G massive MIMO receivers. IC Role / Device Role / Timing Role: Low-phase-noise clock synthesizer generating 1.2288 GHz sampling clock directly from internal VCO, bypassing external PLL loops. Use Value: Delivers −122 dBc/Hz @ 1 MHz offset and 148 fs rms absolute jitter (200 kHz–10 MHz BW), preserving ENOB > 13.2 bits at Nyquist.
Wireless Transceivers	ATE Instrumentation
Use Scenario: Local oscillator clock distribution in multiband FDD/TDD transceivers requiring independent I/Q sampling clocks with matched group delay. IC Role / Device Role / Timing Role: Dual-output clock distributor providing phase-aligned 245.76 MHz and 491.52 MHz clocks to DACs and ADCs in direct-conversion architectures. Use Value: <10 ps channel-to-channel skew between OUT0/OUT1 and OUT2/OUT3 enables <−75 dBc image rejection without analog calibration.	Use Scenario: Precision clock source for high-resolution parametric test systems requiring sub-200 fs jitter across multiple instrument channels. IC Role / Device Role / Timing Role: Jitter cleaner and frequency translator converting 10 MHz OCXO reference into 100 MHz, 200 MHz, and 1 GHz test clocks with additive jitter <80 fs rms. Use Value: Achieves 54 fs rms absolute jitter using external VCXO (Table 10), meeting IEEE 1149.1 boundary-scan timing margins for 10 Gb/s digital pattern generators.

10/40/100 GbE Line Cards

High-Speed Data Converters

Use Scenario: Clocking SERDES PHYs and FEC engines in OTU3/OTU4 transport modules with Synchronous Ethernet compliance.

IC Role / Device Role / Timing Role: Primary clock generator providing low-jitter 156.25 MHz, 312.5 MHz, and 625 MHz clocks with <10 ps inter-pair skew for parallel lane alignment.

Use Value: Meets ITU-T G.8262 eECPL (enhanced EEC) mask for phase wander and achieves <225 fs rms additive jitter to maintain BER <10⁻¹² under stress conditions.

Use Scenario: Sampling clock source for 16-bit, 1.6 GSPS RF-sampling ADCs in wideband radar and 5G massive MIMO receivers.

IC Role / Device Role / Timing Role: Low-phase-noise clock synthesizer generating 1.2288 GHz sampling clock directly from internal VCO, bypassing external PLL loops.

Use Value: Delivers −122 dBc/Hz @ 1 MHz offset and 148 fs rms absolute jitter (200 kHz–10 MHz BW), preserving ENOB > 13.2 bits at Nyquist.

Wireless Transceivers

ATE Instrumentation

Use Scenario: Local oscillator clock distribution in multiband FDD/TDD transceivers requiring independent I/Q sampling clocks with matched group delay.

IC Role / Device Role / Timing Role: Dual-output clock distributor providing phase-aligned 245.76 MHz and 491.52 MHz clocks to DACs and ADCs in direct-conversion architectures.

Use Value: <10 ps channel-to-channel skew between OUT0/OUT1 and OUT2/OUT3 enables <−75 dBc image rejection without analog calibration.

Use Scenario: Precision clock source for high-resolution parametric test systems requiring sub-200 fs jitter across multiple instrument channels.

IC Role / Device Role / Timing Role: Jitter cleaner and frequency translator converting 10 MHz OCXO reference into 100 MHz, 200 MHz, and 1 GHz test clocks with additive jitter <80 fs rms.

Use Value: Achieves 54 fs rms absolute jitter using external VCXO (Table 10), meeting IEEE 1149.1 boundary-scan timing margins for 10 Gb/s 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
AD9516-0BCPZ	Same 48-lead LFCSP package and core PLL/VCO architecture, but offers four LVPECL + two LVDS outputs instead of six LVPECL	Better suited for mixed-signal systems requiring LVDS interface to FPGAs or ASICs alongside high-speed LVPECL	Select AD9516-0BCPZ when LVDS output capability and reduced LVPECL count are acceptable trade-offs for broader interface flexibility
AD9520-0BCPZ	Includes integrated crystal oscillator circuitry, EEPROM for startup configuration, and seven outputs (four LVPECL + three CMOS), but no on-chip VCO	Designed for zero-delay, crystal-referenced applications where external VCO integration is unnecessary and deterministic boot-up is mandatory	Choose AD9520-0BCPZ when crystal-based timing stability, nonvolatile configuration, and CMOS-level outputs are prioritized over integrated VCO frequency agility

Compared with AD9518-0BCPZ, AD9516-0BCPZ trades two LVPECL outputs for LVDS compatibility-ideal for FPGA-adjacent clocking-while AD9520-0BCPZ replaces the VCO with crystal support and EEPROM, making it optimal for fixed-frequency, configuration-locked systems where VCO tuning range is not required.

Availability

AD9518-0BCPZ is available at Aetrix Electronics and suitable for 10/40/100 GbE line cards, high-speed data converter systems, and wireless transceiver designs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for AD9518-0BCPZ 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, with design centers worldwide and ISO 9001-certified manufacturing.

The AD9518 family was engineered specifically for ultra-low-jitter clock distribution in high-speed communications and instrumentation, emphasizing phase noise optimization, deterministic synchronization, and robust reference switchover for mission-critical timing infrastructure.

FAQ

What is the maximum output frequency supported by AD9518-0BCPZ?

The AD9518-0BCPZ supports LVPECL differential outputs up to 1.6 GHz when using the internal VCO or external clock source. This is confirmed in the "CLOCK OUTPUTS" section (Table 4, Page 6) of the Rev. D datasheet, which specifies 1.6 GHz as the maximum operational frequency for OUT0–OUT5 under standard 3.3 V supply and 50 Ω termination conditions. Higher frequencies (up to 2.95 GHz) are achievable only when routing the VCO output directly to an external load-not through the LVPECL driver stage.

Does AD9518-0BCPZ support automatic synchronization of all outputs at power-up?

Yes, AD9518-0BCPZ performs automatic synchronization of all six LVPECL outputs during power-up, ensuring deterministic phase alignment without firmware intervention. This behavior is explicitly documented in the "GENERAL DESCRIPTION" (Page 1) and "Functional Block Diagram" caption (Figure 1), and is enabled by internal reset sequencing that reloads divider phase registers simultaneously upon VDD stabilization.

Can AD9518-0BCPZ accept both differential and single-ended reference inputs?

Yes, AD9518-0BCPZ accepts differential reference inputs (REFIN/REFIN) supporting LVPECL/LVDS up to 250 MHz, and also supports two independent single-ended CMOS-compatible inputs (REF1/REF2) with AC- or DC-coupled operation. The "REFERENCE INPUTS" section (Table 2, Page 4) confirms dual-mode support, including slew rate requirements (>50 V/μs) and logic threshold levels (0.8 V / 2.0 V) for reliable single-ended detection.

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

The AD9518-0BCPZ achieves 225 fs rms additive output jitter in distribution-only mode (VCO divider bypassed), as specified in the "FEATURES" summary (Page 1) and verified in Table 11 (Page 9) of the Rev. D datasheet. This value represents jitter contributed solely by the LVPECL output path and dividers-excluding PLL and VCO contributions-and is measured with CLK = 622.08 MHz, output = 622.08 MHz, and divider = 1, under 12 kHz–20 MHz integration bandwidth.

Is AD9518-0BCPZ compatible with 5 V charge pump voltage for external VCO use?

Yes, AD9518-0BCPZ supports VCP supply voltages up to 5.25 V, enabling direct interfacing with external VCOs requiring extended tuning voltage ranges. The "POWER SUPPLY REQUIREMENTS" table (Table 1, Page 4) specifies VCP = VS to 5.25 V, and the "GENERAL DESCRIPTION" (Page 1) explicitly states that connecting VCP to 5 V accommodates external VCOs-while core logic remains at 3.3 V.

AD9518-0BCPZ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: *

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

Packaging:: Tray

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:: 2.95GHz

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)

AD9518-0BCPZ FAQ

1.How can I place an order for AD9518-0BCPZ through Aetrix?

Please submit a Request for Quotation (RFQ) for AD9518-0BCPZ 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 AD9518-0BCPZ reliable?

The price and inventory of AD9518-0BCPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9518-0BCPZ is usually 5 days.

3.What payment methods are accepted for AD9518-0BCPZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9518-0BCPZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AD9518-0BCPZ?

AD9518-0BCPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AD9518-0BCPZ 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 AD9518-0BCPZ?

For technical support, including AD9518-0BCPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9518-0BCPZ requirements.

6.How does Aetrix verify that AD9518-0BCPZ is sourced from the original manufacturer or authorized distributors?

All AD9518-0BCPZ 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 AD9518-0BCPZ meets industry standards.

7.What is the process for return or replacement of AD9518-0BCPZ?

All AD9518-0BCPZ units undergo pre-shipment inspection (PSI). If there is an issue with AD9518-0BCPZ, 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 AD9518-0BCPZ part is unused and in its original packaging.

Return procedure for AD9518-0BCPZ:

1.Submit a request within 90 days.

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

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