Overview
The AD9516-2BCPZ, produced by Analog Devices Inc., is a 14-output clock generator that integrates a 2.2 GHz Voltage-Controlled Oscillator (VCO) and a phase-locked loop (PLL). This device is designed to provide multi-output clock distribution with subpicosecond jitter performance, making it ideal for applications requiring low jitter and phase noise.
The AD9516-2 emphasizes low jitter and phase noise to maximize data converter performance and can benefit other applications with demanding phase noise and jitter requirements. It operates from a single 3.3 V supply and is available in a 64-lead LFCSP package.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| VCO Frequency Range | 2.05 GHz | - | 2.33 GHz | - | On-chip VCO |
| External VCO/VCXO Frequency Range | - | - | 2.4 GHz | - | Optional |
| LVPECL Output Frequency | - | - | 1.6 GHz | - | Each output pair shares a 1-to-32 divider |
| LVDS Output Frequency | - | - | 800 MHz | - | Each output pair shares two cascaded 1-to-32 dividers |
| CMOS Output Frequency | - | - | 250 MHz | - | Each LVDS output can be reconfigured as two CMOS outputs |
| Additive Output Jitter (LVPECL) | - | - | 225 fs rms | - | - |
| Additive Output Jitter (LVDS) | - | - | 275 fs rms | - | - |
| Channel-to-Channel Skew (Paired Outputs) | - | - | <10 ps | - | - |
| Operating Temperature Range | -40°C | - | +85°C | - | Industrial range |
| Supply Voltage | 3.3 V | - | - | V | Single supply |
| Package Type | - | - | - | - | 64-lead LFCSP |
Key Features
- On-chip VCO tunes from 2.05 GHz to 2.33 GHz, with optional external VCO/VCXO up to 2.4 GHz.
- 1 differential or 2 single-ended reference inputs with reference monitoring capability and automatic revertive and manual reference switchover/holdover modes.
- Accepts LVPECL, LVDS, or CMOS references up to 250 MHz.
- Programmable delays in the path to the Phase Frequency Detector (PFD).
- Digital or analog lock detect, selectable.
- Six pairs of 1.6 GHz LVPECL outputs and four pairs of 800 MHz LVDS clock outputs, with each LVDS output reconfigurable as two 250 MHz CMOS outputs.
- Each output pair has dividers allowing both divide ratio and coarse phase delay settings.
- Additive output jitter of 225 fs rms for LVPECL and 275 fs rms for LVDS outputs.
- Channel-to-channel skew of less than 10 ps for paired outputs.
- Fine delay adjust (Δt) on each LVDS output.
Applications
- Low jitter, low phase noise clock distribution.
- 10/40/100 Gb/sec networking line cards, including SONET, Synchronous Ethernet, OTU2/3/4.
- Forward error correction (G.710).
- Clocking high-speed ADCs, DACs, DDSs, DDCs, DUCs, MxFEs.
- High-performance wireless transceivers.
- ATE and high-performance instrumentation.
Q & A
- What is the frequency range of the on-chip VCO in the AD9516-2?
The on-chip VCO tunes from 2.05 GHz to 2.33 GHz.
- Can the AD9516-2 use an external VCO/VCXO?
Yes, an external VCO/VCXO up to 2.4 GHz can be used optionally.
- What types of reference inputs does the AD9516-2 accept?
The AD9516-2 accepts LVPECL, LVDS, or CMOS references up to 250 MHz.
- What is the maximum frequency of the LVPECL outputs?
The LVPECL outputs operate up to 1.6 GHz.
- What is the maximum frequency of the LVDS outputs?
The LVDS outputs operate up to 800 MHz.
- Can the LVDS outputs be reconfigured as CMOS outputs?
Yes, each LVDS output can be reconfigured as two 250 MHz CMOS outputs.
- What is the additive output jitter for LVPECL and LVDS outputs?
The additive output jitter is 225 fs rms for LVPECL and 275 fs rms for LVDS outputs.
- What is the channel-to-channel skew for paired outputs?
The channel-to-channel skew is less than 10 ps for paired outputs.
- What is the operating temperature range of the AD9516-2?
The operating temperature range is from -40°C to +85°C.
- In what package is the AD9516-2 available?
The AD9516-2 is available in a 64-lead LFCSP package.
