Overview
The AD9528BCPZ, produced by Analog Devices Inc., is a highly advanced clock generator designed to meet the stringent requirements of modern high-speed data conversion and communication systems. This component features a two-stage phase-locked loop (PLL) architecture, which includes an integrated JESD204B/JESD204C SYSREF generator. The first stage PLL (PLL1) conditions the input reference clock to reduce jitter, while the second stage PLL (PLL2) generates high-frequency clocks with low integrated jitter and broadband noise. The on-chip voltage-controlled oscillator (VCO) tunes from 3.450 GHz to 4.025 GHz, and the SYSREF generator outputs signals to time-align multiple devices.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| SUPPLY VOLTAGE (VDDx) | 3.135 | 3.3 | 3.465 | V | 3.3 V ± 5% |
| Ambient Temperature Range (TA) | -40 | +25 | +85 | °C | |
| Junction Temperature (TJ) | +115 | °C | |||
| Output Frequency | 1000 MHz (all outputs), 1250 MHz (OUT0 to OUT3, OUT12, OUT13) | MHz | |||
| Rise Time/Fall Time (20% to 80%) | 50 | 216 | ps | 100 Ω termination across output pair | |
| Duty Cycle | 46 | 51 | 54 | % | f = 500 MHz to 800 MHz |
| Common-Mode Output Voltage | 1.15 | 1.35 | V |
Key Features
- Two-stage PLL architecture with PLL1 for input reference conditioning and PLL2 for high-frequency clock generation.
- Integrated JESD204B/JESD204C SYSREF generator for multiple device synchronization.
- On-chip VCO tuning from 3.450 GHz to 4.025 GHz.
- 14 LVDS/HSTL output channels with configurable sources from PLL1, PLL2, or the internal SYSREF generator.
- Each output channel includes a divider with coarse digital phase adjustment and an analog fine phase delay block for timing alignment.
- Dual input flexible buffer capability to distribute 14 device clock and/or SYSREF signals.
- Low jitter and low phase noise clock distribution.
Applications
- LTE and multicarrier GSM base stations.
- Wireless and broadband infrastructure.
- Medical instrumentation.
- Clocking high-speed ADCs, DACs, DDSs, DDCs, DUCs, and MxFEs.
- Data acquisition systems, such as those using the AD-FMCADC4-EBZ board.
- Spectrum analyzers and military electronics applications like radar and jamming/anti-jamming measures.
- ATE and high-performance instrumentation.
Q & A
- What is the primary function of the AD9528BCPZ?
The AD9528BCPZ is a clock generator with a two-stage PLL and an integrated JESD204B/JESD204C SYSREF generator, designed for multiple device synchronization and low jitter clock distribution.
- What are the key components of the AD9528BCPZ's PLL architecture?
The AD9528BCPZ features two PLL stages: PLL1 for input reference conditioning and PLL2 for high-frequency clock generation.
- What is the frequency range of the on-chip VCO?
The on-chip VCO tunes from 3.450 GHz to 4.025 GHz.
- How many output channels does the AD9528BCPZ have, and what are their maximum frequencies?
The AD9528BCPZ has 14 output channels, with six outputs (OUT0 to OUT3, OUT12, OUT13) capable of up to 1.25 GHz and eight outputs capable of up to 1 GHz.
- What is the purpose of the SYSREF generator in the AD9528BCPZ?
The SYSREF generator outputs single shot, N-shot, or continuous signals synchronous to the PLL outputs to time-align multiple devices.
- Can the AD9528BCPZ be used as a flexible buffer?
Yes, the AD9528BCPZ can be used as a dual input flexible buffer to distribute 14 device clock and/or SYSREF signals.
- What are some typical applications of the AD9528BCPZ?
Typical applications include LTE and multicarrier GSM base stations, wireless and broadband infrastructure, medical instrumentation, and high-speed data acquisition systems.
- How does the AD9528BCPZ ensure timing alignment across its output channels?
Each output channel includes a divider with coarse digital phase adjustment and an analog fine phase delay block for complete flexibility in timing alignment.
- What is the significance of the power-up ready clocks in the AD9528BCPZ?
At power-up, the AD9528BCPZ sends the VCXO signal directly to Output 12 and Output 13 to serve as the power-up ready clocks.
- Where can I find more detailed specifications and evaluation tools for the AD9528BCPZ?
More detailed specifications and evaluation tools can be found on the Analog Devices website, including the AD9528 datasheet and the EVAL-AD9528 evaluation board.
