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Analog Devices Inc. AD9572ACPZLVD-R7
- Part No.:
- AD9572ACPZLVD-R7
- Manufacturer:
- Analog Devices Inc.
- Package:
- 40-WFQFN Exposed Pad, CSP
- Datasheet:
-
AD9572ACPZLVD-R7.pdf
- Description:
- IC CLOCK GENERATOR 40LFCSP
- Quantity:
- Payment:
- Shipping:
Inventory:1,771
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Product details
Overview
AD9572ACPZLVD-R7 from Analog Devices is a dual-PLL, 7-output clock generator IC optimized for fiber channel and Gigabit Ethernet line cards. It delivers seven synchronized clock outputs-including 156.25 MHz, dual 106.25 MHz, dual 100/125 MHz (strappable), 33.33 MHz CMOS, and 25 MHz reference-using integrated loop filters and a 25 MHz crystal input. Its 0.19 ps rms jitter at 156.25 MHz (LVDS, 1.875–20 MHz band) supports low-error-rate 10G SFP+ and PCIe timing.
For engineers reviewing the AD9572ACPZLVD-R7 datasheet, AD9572ACPZLVD-R7 pinout, AD9572ACPZLVD-R7 application, or AD9572ACPZLVD-R7 equivalent, key selection criteria include output format flexibility (LVPECL/LVDS/CMOS), strappable 100/125 MHz selection, additive phase noise performance below −120 dBc/Hz at 10 kHz offset, and 40-lead LFCSP package compatibility with high-density optical module layouts.
Technical Context
The AD9572ACPZLVD-R7 integrates two independent integer-N PLL cores: one optimized for Fibre Channel (FC) at 156.25 MHz with dedicated VCO, PFD/CP, and third-order loop filter; the other for Gigabit Ethernet (GbE) at 106.25 MHz, also with full on-die loop filtering. Both PLLs accept a single 25 MHz crystal or clock via REFCLK and use preprogrammed feedback/output dividers-no external programming required.
Output drivers are configurable per pin strapping: FREQSEL selects 100 MHz or 125 MHz for Pins 19/20/21/22; REFSEL chooses between crystal oscillator or external REFCLK; FORCE_LOW forces Pin 23 (33.33 MHz) low. All seven outputs operate from a single 3.3 V supply, with separate VS rails per functional block to isolate noise coupling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Count | 7 fully buffered, simultaneous clock outputs: 1×156.25 MHz, 2×106.25 MHz, 2×100/125 MHz, 1×33.33 MHz, 1×25 MHz |
| Jitter (156.25 MHz LVDS) | 0.42 ps rms (12 kHz–20 MHz integration), enabling <10⁻¹² BER in 10G FC links |
| Phase Noise (156.25 MHz) | −151 dBc/Hz at 10 MHz offset (LVDS), critical for minimizing eye closure in serial data receivers |
| Input Reference | 25 MHz fundamental-mode crystal (14 pF load, 50 Ω ESR) or CMOS clock, eliminating need for external oscillator |
| Output Formats | LVPECL (1.07 W), LVDS (0.71 W), or CMOS-user-selectable per output group via pin strapping |
| Supply Voltage | 3.3 V ±10%, with 10 dedicated VS pins enabling localized power integrity and reduced crosstalk |
| Operating Temperature | −40°C to +85°C, qualified for industrial-grade optical line card deployment |
Pinout & Package
AD9572ACPZLVD-R7 uses a 40-lead, 6 mm × 6 mm lead frame chip scale package (LFCSP) with exposed thermal paddle that must be soldered to ground for electrical and thermal integrity. Pin 1 is marked by dot; exposed paddle (EPAD) is electrically GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 4, 23 | CMOS Clock Outputs | 25 MHz (Pin 4) and 33.33 MHz (Pin 23) single-ended outputs; each sourced/sunk at 1 mA with 0.25–2.6 ns rise/fall times |
| 17–18, 29–30, 31–32, 19–20, 21–22 | Differential Clock Outputs | LVPECL/LVDS pairs: 156.25 MHz (17/18), dual 106.25 MHz (29/30, 31/32), dual 100/125 MHz (19/20, 21/22); VOD = 250–950 mV depending on format |
| 6–7, 8 | Crystal Interface | XTAL pins (6/7) connect 25 MHz crystal; REFCLK (Pin 8) accepts external 25 MHz clock if REFSEL = low |
| 9, 27, 37 | Configuration Inputs | REFSEL (Pin 9): selects crystal vs. REFCLK; FREQSEL (Pin 27): selects 100/125 MHz; FORCE_LOW (Pin 37): disables 33.33 MHz output |
| 1, 10, 34, EPAD | Ground | All GND pins-including exposed paddle-must be connected to system ground plane for noise immunity and thermal dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Fully integrated dual PLL architecture | Eliminates all external loop filter components-reduces BOM count, layout area, and tuning effort for both FC and GbE clocks |
| Strappable 100/125 MHz output selection | FREQSEL pin configures Pins 19/20/21/22 for either 100 MHz (PCIe Gen1/2) or 125 MHz (GigE) without firmware or register writes |
| Low additive jitter performance | 0.19 ps rms (156.25 MHz LVDS, 1.875–20 MHz) enables direct use in 10G SFP+ PHY timing without additional jitter cleaning |
| Multi-format output drivers | Single device supports LVPECL (for backplane), LVDS (for FPGA I/O), and CMOS (for ASIC control)-reducing SKU proliferation |
| Dedicated power domains per function block | 10 independent VS pins isolate noise between crystal oscillator, FC PLL, GbE PLL, and each output buffer group |
Applications
| Fibre Channel Line Cards | Gigabit Ethernet Switches |
|---|---|
Use Scenario: Timing synchronization across quad-SFP PHYs and 16-port FC ASIC in enterprise storage switches. IC Role / Device Role / Timing Role: Primary clock source generating 156.25 MHz FC reference, 25 MHz management clock, and 33.33 MHz control clock. Use Value: Sub-0.5 ps jitter ensures <10⁻¹² bit error rate over 10 km SMF links; integrated dual PLL avoids inter-clock skew between FC and management domains. |
Use Scenario: Clock distribution for multi-lane 10GBASE-KR and 10GBASE-SR interfaces in modular chassis switches. IC Role / Device Role / Timing Role: Generates dual 106.25 MHz GbE clocks and strappable 100/125 MHz clocks for SerDes lanes and MAC logic. Use Value: LVDS outputs drive FPGA transceivers directly; 0.22 ps rms jitter at 106.25 MHz meets IEEE 802.3ae jitter compliance for KR backplane channels. |
| PCIe Gen2/Gen3 Root Complexes | Optical Transport Modules |
Use Scenario: Reference clock generation for CPU island and PCIe switch in server motherboard designs. IC Role / Device Role / Timing Role: Provides 100 MHz PCIe reference (via FREQSEL = low) and 106.25 MHz auxiliary clock for packet processing ASICs. Use Value: Preprogrammed dividers guarantee exact PCIe Gen2 (100 MHz) and Gen3 (100 MHz) frequencies; no configuration registers to initialize. |
Use Scenario: Timing engine for 10G SFP+ modules requiring multiple synchronous clocks with tight phase alignment. IC Role / Device Role / Timing Role: Delivers 156.25 MHz (XFP/SGMII), 106.25 MHz (XAUI), and 25 MHz (management interface) from single 25 MHz crystal. Use Value: 6 mm × 6 mm LFCSP footprint fits within SFP+ module height constraints; 3.3 V single-supply simplifies module power design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar clock generator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5338A-D-GM | Programmable I²C-based 4-output clock generator; requires external EEPROM and configuration; higher jitter (0.65 ps rms @ 156.25 MHz) | Used where frequency flexibility > jitter performance; supports non-standard rates (e.g., 122.88 MHz for CPRI) | Select when custom output frequencies or dynamic reconfiguration are required; not drop-in for AD9572ACPZLVD-R7's fixed-ratio, pin-strapped operation. |
| ICS8430I-01T | Fixed 7-output LVDS-only generator; no CMOS or LVPECL support; higher power (1.2 W); no 156.25 MHz output (max 125 MHz) | Targeted at cost-sensitive Gigabit Ethernet only; lacks FC-specific 156.25 MHz and 33.33 MHz outputs | Choose for pure LVDS 100/125 MHz applications where 156.25 MHz and multi-format support are unnecessary. |
Compared with Si5338A-D-GM and ICS8430I-01T, AD9572ACPZLVD-R7 uniquely combines FC-optimized 156.25 MHz generation, strappable 100/125 MHz, and triple-format outputs in a single fixed-function IC-enabling faster time-to-market for optical line cards without firmware development or external memory.
Availability
AD9572ACPZLVD-R7 is available at Aetrix Electronics and suitable for fiber channel line cards, Gigabit Ethernet switches, and PCIe Gen2/Gen3 root complexes requiring stable component supply across extended product lifecycles.
Supply support for AD9572ACPZLVD-R7 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 AD9572ACPZLVD-R7 belongs to Analog Devices' precision clock generation product line, designed specifically for low-jitter, multi-output timing in high-speed optical and datacom infrastructure equipment.
FAQ
What is the primary clock input requirement for AD9572ACPZLVD-R7?
The AD9572ACPZLVD-R7 requires a 25 MHz fundamental-mode crystal (14 pF load, 50 Ω ESR) connected to Pins 6 and 7, or a 25 MHz CMOS clock applied to Pin 8 (REFCLK). REFSEL (Pin 9) selects between these sources. No external oscillator is needed-the internal crystal oscillator circuit drives the PLLs directly.
How does AD9572ACPZLVD-R7 support both 100 MHz and 125 MHz outputs?
AD9572ACPZLVD-R7 supports both 100 MHz and 125 MHz outputs on Pins 19/20/21/22 via the FREQSEL pin (Pin 27). When FREQSEL is pulled low, the outputs are configured for 100 MHz; when pulled high, they deliver 125 MHz. This strapping eliminates the need for register programming or external configuration devices.
Can AD9572ACPZLVD-R7 generate all seven outputs simultaneously?
Yes, AD9572ACPZLVD-R7 is designed to drive all seven outputs concurrently: 156.25 MHz (Pins 17/18), dual 106.25 MHz (Pins 29/30 and 31/32), dual 100/125 MHz (Pins 19/20 and 21/22), 33.33 MHz (Pin 23), and 25 MHz (Pin 4). Power dissipation remains within spec (0.71 W LVDS / 1.07 W LVPECL) under full-load conditions.
What is the role of the exposed paddle (EPAD) on AD9572ACPZLVD-R7?
The exposed paddle on AD9572ACPZLVD-R7 is an electrical connection to ground-not just thermal. It must be soldered to the PCB ground plane to ensure proper device operation, noise immunity, and thermal dissipation. Leaving it unconnected or floating will cause functional failure or degraded jitter performance.
Does AD9572ACPZLVD-R7 require external loop filter components?
No, AD9572ACPZLVD-R7 integrates third-order loop filters for both PLLs. Only bypass capacitors (220 nF on BYPASS1/Pin 36 and BYPASS2/Pin 14) are required. This eliminates external resistors/capacitors, reduces board area, and removes loop filter tuning-accelerating design validation for fiber channel and Ethernet timing systems.
AD9572ACPZLVD-R7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 40-WFQFN Exposed Pad, CSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Clock Generator, Fanout Distribution, Multiplexer
- PLL:
- Yes
- Input:
- Crystal
- Output:
- CMOS, LVDS, LVPECL
- Number of Circuits:
- 1
- Ratio - Input:Output:
- 1:7
- Differential - Input:Output:
- No/Yes
- Frequency - Max:
- 156.25MHz
- Divider/Multiplier:
- Yes/No
- Voltage - Supply:
- 2.97V ~ 3.63V
- Operating Temperature:
- -40°C ~ 85°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 40-LFCSP-WQ (6x6)
AD9572ACPZLVD-R7 FAQ
1.How can I place an order for AD9572ACPZLVD-R7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD9572ACPZLVD-R7 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 AD9572ACPZLVD-R7 reliable?
The price and inventory of AD9572ACPZLVD-R7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD9572ACPZLVD-R7 is usually 5 days.
3.What payment methods are accepted for AD9572ACPZLVD-R7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD9572ACPZLVD-R7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD9572ACPZLVD-R7?
AD9572ACPZLVD-R7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD9572ACPZLVD-R7 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 AD9572ACPZLVD-R7?
For technical support, including AD9572ACPZLVD-R7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD9572ACPZLVD-R7 requirements.
6.How does Aetrix verify that AD9572ACPZLVD-R7 is sourced from the original manufacturer or authorized distributors?
All AD9572ACPZLVD-R7 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 AD9572ACPZLVD-R7 meets industry standards.
7.What is the process for return or replacement of AD9572ACPZLVD-R7?
All AD9572ACPZLVD-R7 units undergo pre-shipment inspection (PSI). If there is an issue with AD9572ACPZLVD-R7, 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 AD9572ACPZLVD-R7 part is unused and in its original packaging.
Return procedure for AD9572ACPZLVD-R7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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