Analog Devices Inc. AD9516-4BCPZ-REEL7

Overview

AD9516-4BCPZ-REEL7 from Analog Devices is a 14-output clock generator with integrated 1.45–1.80 GHz VCO, six 1.6 GHz LVPECL outputs (in three pairs), four 800 MHz LVDS outputs (in two pairs), and fine delay adjust on each LVDS/CMOS output. It delivers sub-picosecond jitter performance for high-speed data converter clocking in 10/40/100 GbE line cards and wireless transceivers.

For engineers reviewing the AD9516-4BCPZ-REEL7 datasheet, AD9516-4BCPZ-REEL7 pinout, AD9516-4BCPZ-REEL7 application, or AD9516-4BCPZ-REEL7 equivalent, key selection criteria include additive jitter (225 fs rms LVPECL, 275 fs rms LVDS), channel-to-channel skew (<10 ps paired LVPECL), programmable dividers (1–32 for LVPECL, up to 1024 for LVDS/CMOS), and dual-reference switchover capability.

Technical Context

The AD9516-4BCPZ-REEL7 integrates a low-noise PLL with an on-chip VCO (1.45–1.80 GHz) and supports optional external VCO/VCXO up to 2.4 GHz. Its phase-frequency detector operates at up to 100 MHz with selectable antibacklash pulse widths (1.3–6.0 ns), and charge pump current is programmable (0.6–4.8 mA) via CPRSET resistor.

Each of the six LVPECL outputs shares a 1-to-32 divider with coarse phase delay; each of the four LVDS outputs includes fine delay adjust (Δt) and can be reconfigured as two 250 MHz CMOS outputs. All outputs synchronize automatically at power-up, and manual synchronization is supported via SYNC pin.

Key Specifications

Pinout & Package

AD9516-4BCPZ-REEL7 is housed in a 64-lead LFCSP (9 mm × 9 mm, 0.5 mm pitch) with exposed paddle for thermal management. Power domains include VS (3.3 V core), VS_LVPECL (2.5–3.3 V), and VCP (3.3–5.0 V for external VCO support).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9516-4BCPZ-REEL7, AD9517-4BCPZ-REEL7 extends VCO range but increases complexity and cost, while LTC6957-4IUF#PBF offers superior jitter cleaning but sacrifices integrated synthesis and multi-output flexibility.

Availability

AD9516-4BCPZ-REEL7 is available at Aetrix Electronics and suitable for 10/40/100 GbE networking, high-speed data converter clocking, wireless transceiver timing, and ATE instrumentation requiring stable component supply and long-term lifecycle support.

Supply support for AD9516-4BCPZ-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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The AD9516 family is designed specifically for ultra-low-jitter clock distribution and synthesis in demanding RF, communications, and test equipment applications where phase noise and deterministic skew directly impact system-level performance.

FAQ

What is the maximum operating frequency of the LVPECL outputs on the AD9516-4BCPZ-REEL7?

The AD9516-4BCPZ-REEL7 supports LVPECL outputs up to 1.6 GHz in distribution-only mode (bypassing the VCO divider). When using the internal VCO, the maximum LVPECL output frequency remains 1.6 GHz, as specified in the datasheet's Clock Outputs table. This limit ensures guaranteed amplitude and jitter performance across temperature and voltage variations.

Does the AD9516-4BCPZ-REEL7 support automatic synchronization of all outputs at power-up?

Yes, the AD9516-4BCPZ-REEL7 performs automatic synchronization of all 14 outputs on power-up, ensuring deterministic phase relationships without external intervention. This behavior is enabled by default and can be confirmed in the "Automatic synchronization of all outputs on power-up" feature listing and the Reset Modes section of the datasheet.

Can the LVDS outputs of the AD9516-4BCPZ-REEL7 be used as CMOS outputs?

Yes, each of the four LVDS outputs (OUT6–OUT9) on the AD9516-4BCPZ-REEL7 can be individually reconfigured as two 250 MHz CMOS outputs, yielding up to eight additional single-ended clocks. This is implemented via register-controlled output driver mode selection and is documented in the General Description and Clock Outputs sections.

What is the additive jitter specification for the AD9516-4BCPZ-REEL7 LVDS outputs?

The AD9516-4BCPZ-REEL7 specifies 275 fs rms additive output jitter for its LVDS outputs under distribution-only conditions (VCO divider bypassed), measured with 1.6 GHz input and 800 MHz output. This value excludes PLL and VCO contributions and reflects the intrinsic noise of the LVDS distribution path alone.

How does the AD9516-4BCPZ-REEL7 handle reference input failure?

The AD9516-4BCPZ-REEL7 implements both automatic revertive and manual reference switchover/holdover modes. Upon reference loss, it can maintain output frequency using the last-known VCO tuning voltage or switch to a backup reference, with status reported via REFMON and LD pins - all configurable via the serial control port.