Analog Devices Inc. AD9517-3ABCPZ-RL7

Overview

AD9517-3ABCPZ-RL7 from Analog Devices is a 12-output clock generator with integrated 1.75–2.25 GHz VCO, delivering subpicosecond jitter performance for high-speed data converter timing. It provides four 1.6 GHz LVPECL outputs (in two pairs), four 800 MHz LVDS outputs (in two pairs), and supports reconfiguration of each LVDS output as two 250 MHz CMOS outputs. Designed for low-phase-noise clock distribution in 10/40/100 GbE line cards and high-performance ADC/DAC clocking.

For engineers reviewing the AD9517-3ABCPZ-RL7 datasheet, AD9517-3ABCPZ-RL7 pinout, AD9517-3ABCPZ-RL7 application, or AD9517-3ABCPZ-RL7 equivalent, key selection criteria include additive jitter (225 fs rms LVPECL, 275 fs rms LVDS), coarse/fine delay adjust per output pair, channel-to-channel skew (<10 ps paired LVPECL), internal VCO tuning range, and support for manual/automatic reference switchover in telecom and instrumentation systems.

Technical Context

The AD9517-3ABCPZ-RL7 integrates a PLL with programmable PFD frequency (up to 100 MHz), on-chip VCO (1.75–2.25 GHz), and dual-path clock distribution: two independent LVPECL output banks (each with 1:32 divider + coarse phase delay) and two independent LVDS/CMOS banks (each with cascaded 1:32 dividers + fine Δt delay). All outputs synchronize automatically at power-up.

It accepts differential (LVPECL/LVDS) or dual single-ended (CMOS) references up to 250 MHz, features digital/analog lock detect, and supports external VCO/VCXO up to 2.4 GHz. Power architecture includes separate 3.3 V core, 2.5–3.3 V LVPECL, and optional 5 V charge pump supplies.

Key Specifications

Pinout & Package

AD9517-3ABCPZ-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 AD9517-3 Rev. F datasheet Section "Pin Configuration and Function Descriptions" (Page 18).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9517-3ABCPZ-RL7, AD9516-3BCPZ-REEL7 offers identical jitter performance and VCO integration but reduced output count, while LMK04832RHAT trades on-chip VCO simplicity for advanced JESD204B timing features and higher LVDS bandwidth-making it preferable for FPGA-centric radio systems requiring SYSREF co-distribution.

Availability

AD9517-3ABCPZ-RL7 is available at Aetrix Electronics and suitable for 100G optical transport, high-speed data acquisition, and wireless massive MIMO baseband applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for AD9517-3ABCPZ-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 targets ultra-low-jitter clock distribution for data converters and high-speed serial interfaces, emphasizing phase noise optimization, deterministic synchronization, and flexible output configuration for telecom, instrumentation, and defense applications.

FAQ

What is the maximum operating frequency of the LVPECL outputs on the AD9517-3ABCPZ-RL7?

The AD9517-3ABCPZ-RL7 supports LVPECL outputs up to 1.6 GHz, verified under typical conditions (VS = 3.3 V, TA = 25°C) with 50 Ω termination to VS − 2 V. This allows direct clocking of high-speed ADCs, DACs, and FPGA transceivers without external frequency multiplication. Operation above 1.6 GHz is possible but may not meet guaranteed VOD or jitter specifications.

Does the AD9517-3ABCPZ-RL7 include an on-chip VCO, and what is its tuning range?

Yes, the AD9517-3ABCPZ-RL7 integrates a voltage-controlled oscillator with a guaranteed tuning range of 1.75 GHz to 2.25 GHz. This on-chip VCO eliminates the need for external VCO components in many clock generation applications and contributes to the device's low phase noise performance (−126 dBc/Hz at 1 MHz offset).

Can the LVDS outputs of the AD9517-3ABCPZ-RL7 be reconfigured as CMOS outputs?

Yes, each of the four LVDS outputs (OUT4–OUT7) on the AD9517-3ABCPZ-RL7 can be individually reconfigured as two 250 MHz CMOS outputs (e.g., OUT4 becomes OUT4A and OUT4B), providing up to eight additional single-ended clocks. This flexibility supports mixed-signal systems requiring both differential and single-ended timing signals from one device.

What is the additive jitter specification for the AD9517-3ABCPZ-RL7 LVPECL and LVDS outputs?

The AD9517-3ABCPZ-RL7 specifies 225 fs rms additive jitter for LVPECL outputs and 275 fs rms for LVDS outputs, measured under distribution-only conditions (VCO divider bypassed). These values reflect the intrinsic jitter added by the output buffers and dividers alone, excluding PLL/VCO contributions, and are critical for preserving SNR in high-resolution data converters.

How does the AD9517-3ABCPZ-RL7 handle reference input failure or loss?

The AD9517-3ABCPZ-RL7 implements automatic revertive and manual reference switchover/holdover modes. When the primary reference fails, it can seamlessly switch to a secondary reference or enter holdover using the internal VCO's last-known frequency, minimizing timing disruption. Reference monitoring status is available on the REFMON pin and via serial register reads.