Analog Devices Inc. AD9516-2BCPZ-REEL7

Overview

AD9516-2BCPZ-REEL7 from Analog Devices is a 14-output clock generator with integrated 2.2 GHz VCO, delivering subpicosecond jitter performance for high-speed data converter clocking. It features six 1.6 GHz LVPECL outputs (in three pairs), four 800 MHz LVDS outputs (in two pairs), and supports reconfiguration of each LVDS output as two 250 MHz CMOS outputs. Its on-chip PLL/VCO architecture enables low phase noise clock generation and cleanup in 10/40/100 GbE line cards and high-performance instrumentation.

For engineers reviewing the AD9516-2BCPZ-REEL7 datasheet, AD9516-2BCPZ-REEL7 pinout, AD9516-2BCPZ-REEL7 application, or AD9516-2BCPZ-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 coarse/fine delay per output, dual reference input support (LVPECL/LVDS/CMOS to 250 MHz), and operation across −40°C to +85°C.

Technical Context

The AD9516-2BCPZ-REEL7 implements a fully integrated PLL with a 2.05–2.33 GHz on-chip VCO and supports external VCO/VCXO up to 2.4 GHz. Its phase frequency detector (PFD) operates up to 100 MHz with selectable antibacklash pulse widths (1.3 ns, 2.9 ns, or 6.0 ns), and charge pump current is programmable (0.6 mA or 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 uses two cascaded 1-to-32 dividers (max 1024 total division) plus fine delay adjust (Δt). All outputs synchronize automatically at power-up, and manual synchronization is supported via SYNC pin.

Key Specifications

Pinout & Package

AD9516-2BCPZ-REEL7 is housed in a 64-lead LFCSP (9 mm × 9 mm, 0.5 mm pitch) with exposed paddle for thermal management. Pin functions are defined per Analog Devices AD9516-2 Rev. C datasheet Section "Pin Configuration and Function Descriptions" (pages 17–19).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD9516-2BCPZ-REEL7, AD9517-2BCPZ-REEL7 extends frequency coverage at the cost of power and compatibility, while LMK04832RHAT trades integration for ultimate jitter performance - making AD9516-2BCPZ-REEL7 the optimal balance of on-chip VCO convenience, 14-output flexibility, and sub-250 fs jitter in space-constrained telecom and instrumentation designs.

Availability

AD9516-2BCPZ-REEL7 is available at Aetrix Electronics and suitable for 10/40/100 GbE line cards, high-speed data converter clocking, wireless transceiver front ends, ATE systems, and instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for AD9516-2BCPZ-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 high-speed communications, test equipment, and precision data acquisition - with the AD9516-2BCPZ-REEL7 optimized for 2.2 GHz VCO-based systems needing 14 synchronized outputs and industrial temperature operation.

FAQ

What is the maximum operating frequency of the LVPECL outputs on the AD9516-2BCPZ-REEL7?

The AD9516-2BCPZ-REEL7 supports LVPECL outputs up to 1.6 GHz in clock distribution mode (VCO divider bypassed) and up to 2.95 GHz in direct-to-output mode (using internal VCO without division). Performance above 1.6 GHz depends on load termination and signal integrity; the datasheet specifies 550–980 mV differential output voltage at 1.6 GHz with 50 Ω termination to VS − 2 V.

Does the AD9516-2BCPZ-REEL7 support automatic synchronization of all outputs at power-up?

Yes, the AD9516-2BCPZ-REEL7 performs automatic synchronization of all 14 outputs on power-up, ensuring deterministic phase alignment without firmware intervention. This behavior is enabled by default and relies on internal state machines that reset dividers and delay blocks simultaneously upon power stabilization - a key feature for systems requiring repeatable timing at boot, such as telecom line cards and radar signal processors.

Can the LVDS outputs of the AD9516-2BCPZ-REEL7 be reconfigured as CMOS outputs?

Yes, each of the four LVDS outputs (OUT6–OUT9) on the AD9516-2BCPZ-REEL7 can be individually reconfigured as two 250 MHz CMOS outputs (e.g., OUT6 becomes OUT6A and OUT6B), providing up to eight additional single-ended clocks. This is controlled via configuration registers and requires appropriate termination (10 pF load) and level-shifting considerations - enabling flexible clock routing to microcontrollers, FPGAs, or legacy logic without external translators.

What is the additive jitter specification for the AD9516-2BCPZ-REEL7 LVDS outputs?

The AD9516-2BCPZ-REEL7 specifies 275 fs rms additive output jitter for its LVDS outputs under distribution-only conditions (VCO divider not used), measured with 1.6 GHz input and 800 MHz output at 10 kHz–10 MHz integration bandwidth. This value excludes PLL and VCO contributions, reflecting only the jitter added by the LVDS distribution path - critical for maintaining signal integrity in high-speed serial links and FPGA clock networks.

How does the AD9516-2BCPZ-REEL7 handle reference input failure or loss?

The AD9516-2BCPZ-REEL7 implements both automatic revertive and manual reference switchover modes, plus holdover capability. Upon reference loss, it can switch to a secondary reference (REF1 or REF2) within 1 µs, or enter holdover using an internal oscillator to maintain output stability for up to several seconds. The REFMON pin provides real-time status, and register-controlled lock detect ensures seamless transition without output glitches - essential for carrier-grade network equipment compliance.