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Analog Devices Inc. AD9520-0BCPZ-REEL7
- Part No.:
- AD9520-0BCPZ-REEL7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 64-VFQFN Exposed Pad, CSP
- Datasheet:
-
AD9520-0BCPZ-REEL7.pdf
- Description:
- IC CLOCK GENERATOR 64LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,472
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Product details
Overview
AD9520-0BCPZ-REEL7 from Analog Devices is a 12-output LVPECL/24-output CMOS clock generator with integrated 2.8 GHz VCO, delivering subpicosecond jitter performance for high-speed serial timing. It features four independent output groups (3 LVPECL per group), programmable 1-to-32 dividers with phase delay, and supports internal VCO (2.53–2.95 GHz) or external VCXO up to 2.4 GHz. Used in SONET, 10G Ethernet, and high-speed ADC/DAC clocking.
For engineers reviewing the AD9520-0BCPZ-REEL7 datasheet, AD9520-0BCPZ-REEL7 pinout, AD9520-0BCPZ-REEL7 application, or AD9520-0BCPZ-REEL7 equivalent, key selection criteria include additive jitter (as low as 225 fs rms), channel-to-channel skew (<16 ps within group), zero-delay mode capability, and dual SPI/I²C serial control with nonvolatile EEPROM configuration storage.
Technical Context
The AD9520-0BCPZ-REEL7 integrates a low-noise PLL with a 2.53–2.95 GHz on-die VCO and supports optional external 3.3 V/5 V VCXO up to 2.4 GHz. Its reference input accepts differential LVPECL/LVDS/CMOS signals up to 250 MHz or 16.62–33.3 MHz crystals.
Each of the 12 LVPECL outputs (1.6 GHz max) is grouped into four sets sharing a configurable divider (1–32) and coarse phase delay; any LVPECL output can be reconfigured as two 250 MHz CMOS outputs. Synchronization is automatic at power-up or manual via SYNC pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCO Frequency Range | 2.53–2.95 GHz - enables direct synthesis of 10G/OTU3/SONET line rates without external multiplication |
| LVPECL Output Count & Max Freq | 12 outputs, 1.6 GHz - sufficient for multi-lane SerDes, FPGA transceivers, and RF sampling clocks |
| Additive Output Jitter (rms) | 225 fs - measured distribution-only (no VCO), critical for ADC/DAC aperture uncertainty |
| Channel-to-Channel Skew | <16 ps within group - ensures deterministic timing across parallel data paths (e.g., DDR PHY, MIMO RF) |
| Reference Inputs | 1 differential or 2 single-ended; supports crystal (16.62–33.3 MHz) or LVPECL/LVDS up to 250 MHz - flexible system clock tree integration |
| Serial Interface | SPI- and I²C-compatible with 64-byte EEPROM - enables one-time configuration burn-in and field firmware updates |
| Supply Voltages | VS = 3.3 V ±5%; VS_DRV = 2.375–3.465 V - allows independent optimization of core logic and output driver noise |
Pinout & Package
AD9520-0BCPZ-REEL7 is housed in a 64-lead LFCSP (9 mm × 9 mm, 0.8 mm pitch) with exposed thermal pad. Pin functions are defined per Analog Devices' Rev. C datasheet, Figure 17 (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 common-mode (1.3–1.75 V) enables AC coupling |
| CLK/CLK | Differential clock input | Supports up to 2.4 GHz distribution path; termination to VS_DRV − 2 V required for LVPECL compliance |
| OUT0–OUT11 | Differential LVPECL outputs | Each pair delivers up to 1.6 GHz; configurable as two CMOS outputs ≤250 MHz per pair |
| SYNC | Manual synchronization trigger | Edge-triggered reset of all output dividers and phase delays - enables deterministic multi-device alignment |
| LD/STATUS/REFMON | Lock detect & status monitoring | Digital lock indication with programmable window; supports automatic holdover and reference switchover |
| SDIO/SCLK/CS | SPI serial interface | 3-wire interface with internal pull-up/pull-down; supports 25 MHz clock rate and EEPROM read/write |
Key Features
| Feature | Design Value |
|---|---|
| Zero-delay operation mode | Configurable REF-to-output phase offset (560–1310 ps typical) eliminates static latency in feedback loops |
| Automatic reference switchover | Glitch-free switching between primary/secondary references with revertive recovery - maintains uptime in telecom failover systems |
| Output group synchronization | Independent 1-to-32 dividers per group + coarse phase delay - enables precise inter-group skew control for multi-chip timing domains |
| Nonvolatile EEPROM | Stores full register map including divider ratios, phase offsets, and I/O configurations - eliminates boot-time initialization overhead |
| Reference monitoring & holdover | Detects loss-of-signal and enters stable holdover using last-known VCO tuning voltage - meets GR-1244-CORE jitter holdover requirements |
Applications
| 10G Ethernet Clocking | High-Speed Data Converter Timing |
|---|---|
Use Scenario: Generating synchronized 156.25 MHz, 312.5 MHz, and 625 MHz clocks for 10GBASE-R PHY, XAUI, and backplane interfaces. IC Role / Device Role / Timing Role: Primary clock generator and jitter cleaner; distributes low-jitter clocks while suppressing reference-induced broadband noise. Use Value: Achieves <100 fs rms absolute jitter (200 kHz–20 MHz BW) enabling >10-bit ENOB in 1 GSPS ADCs clocked at 500+ MHz. |
Use Scenario: Providing sample clocks and digital interface clocks (JESD204B subclass 1) for multi-GSPS ADCs and DACs in radar and comms systems. IC Role / Device Role / Timing Role: Multi-output timing hub with deterministic skew control across analog front-end and digital processing blocks. Use Value: Channel-to-channel skew <16 ps ensures time-aligned sampling across interleaved ADC channels, preserving effective resolution. |
| Synchronous Ethernet (SyncE) | Optical Transport Network (OTN) |
Use Scenario: Delivering traceable, ITU-T G.8262-compliant clocks to packet switches and routers with EEC Option 1/2 compliance. IC Role / Device Role / Timing Role: Stratum 3E clock generator with holdover stability and dual-reference redundancy. Use Value: Meets ±4.6 ppm frequency accuracy and <1.5 µs max wander over 24 hours using internal VCO and crystal reference. |
Use Scenario: Generating OTU2 (10.709 Gbps), OTU3 (43.018 Gbps), and OTU4 (111.81 Gbps) line-rate clocks with forward error correction (G.710) support. IC Role / Device Role / Timing Role: Low-phase-noise clock synthesizer with integrated VCO and programmable division for exact line-rate derivation. Use Value: −127 dBc/Hz phase noise at 1 MHz offset (2.75 GHz VCO) ensures BER <10⁻¹² in coherent optical receivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar clock generation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD9522-0BCPZ-REEL7 | Replaces LVPECL outputs with LVDS drivers; identical PLL/VCO architecture and pinout | Required where board-level signaling mandates LVDS (e.g., TI/JESD204B receiver inputs with LVDS tolerance) | Select AD9522-0 when LVDS output swing (±350 mV) and common-mode (1.2 V) are mandatory; no change to control logic or layout needed. |
| LMK04832ISQE/NOPB | Two-stage PLL (jitter cleaner + generator); higher integration (integrated LDOs, more outputs), but larger 72-pin WQFN package | Better suited for ultra-low-jitter cleaning of noisy references (e.g., recovered clocks from SERDES) | Choose LMK04832 for applications requiring <50 fs rms jitter cleanup; AD9520-0BCPZ-REEL7 remains optimal for cost-sensitive, single-stage synthesis with tight skew control. |
Compared with AD9522-0BCPZ-REEL7, AD9520-0BCPZ-REEL7 offers superior LVPECL drive strength (950 mV p-p) for long traces and backplanes; versus LMK04832, it provides lower power (1.2 W vs. 2.1 W) and smaller footprint-critical for space-constrained 10G line cards.
Availability
AD9520-0BCPZ-REEL7 is available at Aetrix Electronics and suitable for 10G Ethernet infrastructure, high-speed data acquisition systems, and optical transport equipment requiring stable component supply across extended product lifecycles.
Supply support for AD9520-0BCPZ-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 AD9520 family targets high-jitter-sensitivity applications such as optical networking, wireless infrastructure, and test equipment-designed to replace discrete PLL/VCO/distribution solutions with a single, calibrated IC.
FAQ
What is the maximum LVPECL output frequency supported by the AD9520-0BCPZ-REEL7?
The AD9520-0BCPZ-REEL7 supports LVPECL outputs up to 2.4 GHz when configured for direct-to-output mode (bypassing internal dividers). However, guaranteed specification compliance (VOD ≥ 660 mV) is maintained up to 1.6 GHz. Above 1.6 GHz, amplitude degrades due to bandwidth limitations, making 1.6 GHz the practical maximum for robust system design.
Can the AD9520-0BCPZ-REEL7 operate with an external VCXO instead of the internal VCO?
Yes, the AD9520-0BCPZ-REEL7 supports optional external 3.3 V or 5 V VCXOs up to 2.4 GHz. The device automatically detects and locks to the external source when enabled via register configuration. This mode is commonly used for ultra-low-jitter clock cleanup applications, such as with Toyocom TCO-2112 VCXOs, achieving as low as 54 fs rms jitter (200 kHz–5 MHz integration BW).
How does the AD9520-0BCPZ-REEL7 handle reference loss and recovery?
The AD9520-0BCPZ-REEL7 implements automatic reference holdover and revertive switchover. Upon reference loss, it sustains oscillation using the last valid VCO tuning voltage, maintaining frequency stability within ±10 ppm for >24 hours. When the primary reference returns, it seamlessly reacquires lock without glitching outputs-critical for telecom base stations and SyncE networks.
Is the AD9520-0BCPZ-REEL7 pin-compatible with other members of the AD9520 family?
No-AD9520-0BCPZ-REEL7 is not pin-compatible with AD9520-1 through AD9520-5 variants. While all share the same 64-lead LFCSP package, pin functions differ significantly (e.g., AD9520-1 supports different VCO ranges and lacks crystal oscillator input). Each variant requires unique PCB layout and register initialization sequences.
What serial interface modes does the AD9520-0BCPZ-REEL7 support, and how are they selected?
The AD9520-0BCPZ-REEL7 supports both SPI and I²C serial control. Mode selection is hardware-configured via SP1 and SP0 pins at power-up: SP1=0/SP0=0 selects SPI; SP1=1/SP0=0 selects I²C. Both interfaces access the same register map and EEPROM, enabling flexible system integration with microcontrollers or FPGAs regardless of available peripheral resources.
AD9520-0BCPZ-REEL7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 64-VFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Clock Generator, Fanout Distribution
- PLL:
- Yes
- Input:
- CMOS, LVDS, LVPECL
- Output:
- CMOS, LVPECL
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 2:12, 2:24
- Differential - Input:Output:
- Yes/Yes
- Frequency - Max:
- 2.95GHz
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 3.135V ~ 3.465V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 64-LFCSP-VQ (9x9)
AD9520-0BCPZ-REEL7 FAQ
1.How can I place an order for AD9520-0BCPZ-REEL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9520-0BCPZ-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 AD9520-0BCPZ-REEL7 reliable?
The price and inventory of AD9520-0BCPZ-REEL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9520-0BCPZ-REEL7 is usually 5 days.
3.What payment methods are accepted for AD9520-0BCPZ-REEL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9520-0BCPZ-REEL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9520-0BCPZ-REEL7?
AD9520-0BCPZ-REEL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9520-0BCPZ-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 AD9520-0BCPZ-REEL7?
For technical support, including AD9520-0BCPZ-REEL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9520-0BCPZ-REEL7 requirements.
6.How does Aetrix verify that AD9520-0BCPZ-REEL7 is sourced from the original manufacturer or authorized distributors?
All AD9520-0BCPZ-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 AD9520-0BCPZ-REEL7 meets industry standards.
7.What is the process for return or replacement of AD9520-0BCPZ-REEL7?
All AD9520-0BCPZ-REEL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD9520-0BCPZ-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 AD9520-0BCPZ-REEL7 part is unused and in its original packaging.
Return procedure for AD9520-0BCPZ-REEL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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