Analog Devices Inc. AD9517-0ABCPZ-RL7

Overview

AD9517-0ABCPZ-RL7 from Analog Devices is a 12-output clock generator with integrated 2.8 GHz VCO, delivering subpicosecond jitter performance for high-speed data converter timing. It features four 1.6 GHz LVPECL outputs (in two pairs), four 800 MHz LVDS outputs (in two pairs, each reconfigurable as dual 250 MHz CMOS), programmable dividers (1–32 for LVPECL; up to 1024 for LVDS/CMOS), and fine delay adjust on all LVDS outputs. It is used in 10/40/100 GbE line cards and high-performance ADC/DAC clocking.

For engineers reviewing the AD9517-0ABCPZ-RL7 datasheet, AD9517-0ABCPZ-RL7 pinout, AD9517-0ABCPZ-RL7 application, or AD9517-0ABCPZ-RL7 equivalent, key selection criteria include additive output jitter (225 fs rms LVPECL, 275 fs rms LVDS), channel-to-channel skew (<10 ps paired LVPECL), VCO tuning range (2.55–2.95 GHz), reference input flexibility (LVPECL/LVDS/CMOS to 250 MHz), and automatic power-up synchronization of all outputs.

Technical Context

The AD9517-0ABCPZ-RL7 integrates a low-noise PLL with an on-chip VCO (2.55–2.95 GHz) and supports optional external VCO/VCXO up to 2.4 GHz. Its phase-frequency detector operates at up to 100 MHz (with configurable antibacklash pulse width), and charge pump current is programmable (0.6 mA or 4.8 mA) via CPRSET resistor.

Each LVPECL output pair shares a 1-to-32 divider with coarse phase delay; each LVDS output pair uses two cascaded 1-to-32 dividers and includes fine delay adjust (Δt). All outputs synchronize automatically at power-up, and manual sync is supported via SYNC pin.

Key Specifications

Pinout & Package

The AD9517-0ABCPZ-RL7 is housed in a 48-lead LFCSP (7 mm × 7 mm, 0.5 mm pitch) with exposed paddle for thermal management. Pin functions are defined per Analog Devices AD9517-0 Rev. F datasheet, Page 18 (Pin Configuration and Function Descriptions).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9517-0ABCPZ-RL7, the AD9517-1ABCPZ-RL7 trades VCO bandwidth for superior close-in phase noise, while the AD9523-1ABCPZ-RL7 replaces the VCO with crystal-referenced stability and adds JESD204B features-making it better for converter synchronization but less flexible for wideband synthesis.

Availability

AD9517-0ABCPZ-RL7 is available at Aetrix Electronics and suitable for 10/40/100 GbE networking, high-speed data converter timing, and wireless transceiver clocking requiring stable component supply and long-term industrial temperature support (−40°C to +85°C).

Supply support for AD9517-0ABCPZ-RL7 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 AD9517 family is designed for ultra-low-jitter clock generation and distribution in high-speed communication, instrumentation, and data acquisition systems where phase noise and timing precision directly impact system-level SNR and BER.

FAQ

What is the VCO tuning range of the AD9517-0ABCPZ-RL7?

The AD9517-0ABCPZ-RL7 features an on-chip VCO with a guaranteed tuning range of 2.55 GHz to 2.95 GHz, as specified in the Rev. F datasheet Table 2. This range supports direct synthesis of clocks for 10/40/100 GbE applications and high-speed ADC/DAC sampling. The VCO gain (KVCO) is typically 50 MHz/V, and tuning voltage must remain between 0.5 V and VCP − 0.5 V to minimize spurs. External VCO/VCXO operation up to 2.4 GHz is also supported.

Can the AD9517-0ABCPZ-RL7 generate both LVPECL and LVDS outputs simultaneously?

Yes, the AD9517-0ABCPZ-RL7 can drive four LVPECL outputs (OUT0–OUT3) and four LVDS outputs (OUT4–OUT7) concurrently. Each LVDS output can be independently reconfigured as two 250 MHz CMOS outputs, enabling up to 12 total clock signals. Power sequencing and supply isolation (VS = 3.3 V, VS_LVPECL = 2.5–3.3 V, VCP = 3.3–5.0 V) must follow the recommendations in the AD9517-0 Rev. F datasheet Section "Power Supply Requirements" to ensure simultaneous stable operation.

What is the additive jitter performance of the AD9517-0ABCPZ-RL7 on its LVPECL outputs?

The AD9517-0ABCPZ-RL7 delivers 225 fs rms additive output jitter on its LVPECL outputs (OUT0–OUT3) when operating in distribution-only mode (VCO divider bypassed), as measured per Table 6 of the Rev. F datasheet. This value excludes PLL and VCO contributions and reflects the intrinsic jitter added by the distribution path alone. At 1 GHz output, phase noise is −146 dBc/Hz at 1 MHz offset, confirming suitability for high-SFDR data converter applications.

Does the AD9517-0ABCPZ-RL7 support automatic synchronization of all outputs at power-up?

Yes, the AD9517-0ABCPZ-RL7 performs automatic synchronization of all 12 outputs on power-up, ensuring deterministic phase alignment without external intervention. This behavior is enabled by default and governed by internal state machines that align divider phases and delay blocks. Manual synchronization remains available via the SYNC pin for runtime recalibration. The functional block diagram (Figure 1) and "Reset Modes" section (Page 49) of the Rev. F datasheet confirm this feature is inherent to the AD9517-0ABCPZ-RL7 silicon design.

What package type and thermal characteristics does the AD9517-0ABCPZ-RL7 use?

The AD9517-0ABCPZ-RL7 is packaged in a 48-lead LFCSP (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal paddle, per CP-48-9 outline (Rev. F datasheet Page 79). Its thermal resistance θJA is 30.6°C/W (mounted on 4-layer JEDEC board), and θJC is 5.2°C/W. The exposed paddle must be soldered to a solid ground plane for optimal thermal performance and jitter stability. Operating junction temperature is rated from −40°C to +125°C, supporting full industrial range (−40°C to +85°C ambient) with appropriate PCB thermal design.