Overview
The AD9524BCPZ-REEL7, produced by Analog Devices Inc., is a low-power, multi-output clock distribution device designed to meet the stringent timing requirements of various high-performance applications. This clock generator integrates an on-chip phase-locked loop (PLL) and a voltage-controlled oscillator (VCO) that tunes from 3.6 GHz to 4.0 GHz. The device is particularly suited for applications requiring low jitter and low phase noise, such as LTE and multicarrier GSM base stations, wireless and broadband infrastructure, and medical instrumentation.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Input Frequency Range (Differential Mode) | - | - | 400 MHz | - | - |
| Input Slew Rate (OSC_IN) | - | - | 400 V/µs | - | Minimum limit imposed for jitter performance |
| Common-Mode Internally Generated Input Voltage | 0.6 V | 0.7 V | 0.8 V | - | - |
| Differential Input Voltage, Sensitivity Frequency (< 250 MHz) | - | - | 100 mV p-p | - | Capacitive coupling required; can accommodate single-ended input by ac coupling |
| Maximum Output Frequency (LVPECL Mode) | - | - | 1 GHz | - | Minimum VCO/maximum dividers |
| Rise Time/Fall Time (20% to 80%) (LVPECL Mode) | 117 ps | 147 ps | - | - | 100 Ω termination across output pair |
| Duty Cycle (LVPECL Mode) at f < 500 MHz | 47 % | 50 % | 52 % | - | - |
| Differential Output Voltage Magnitude (LVPECL Mode) | 643 mV | 775 mV | 924 mV | - | Voltage across pins; output driver static |
Key Features
- Low-power, multi-output clock distribution with low jitter performance
- On-chip PLL and VCO tuning from 3.6 GHz to 4.0 GHz
- Support for both single-ended and differential input and output operations
- Six low-noise outputs with a range of 1 MHz to 1 GHz, and one dedicated buffered output from the input PLL (PLL1)
- Divider phase select function for jitter-free coarse timing adjustment
- In-package EEPROM for storing user-defined register settings for power-up and chip reset
- Support for various output formats including LVPECL, HSTL, and others
Applications
- LTE and multicarrier GSM base stations
- Wireless and broadband infrastructure
- Medical instrumentation
- Clocking high-speed ADCs, DACs, DDSs, DDCs, DUCs, and MxFEs
- Low jitter, low phase noise clock distribution
- Clock generation and translation for SONET, 10Ge, 10G FC, and other 10 Gbps protocols
- Forward error correction (G.710)
- High-performance wireless transceivers
- ATE and high-performance instrumentation
Q & A
- What is the primary function of the AD9524BCPZ-REEL7?
The AD9524BCPZ-REEL7 is a low-power, multi-output clock distribution device with an on-chip PLL and VCO, designed to provide low jitter and low phase noise clock signals.
- What is the frequency range of the VCO in the AD9524BCPZ-REEL7?
The VCO in the AD9524BCPZ-REEL7 tunes from 3.6 GHz to 4.0 GHz.
- What types of input and output operations does the AD9524BCPZ-REEL7 support?
The device supports both single-ended and differential input and output operations.
- How many output clocks can the AD9524BCPZ-REEL7 generate?
The device can generate six low-noise outputs with a range of 1 MHz to 1 GHz, and one dedicated buffered output from the input PLL (PLL1).
- What is the purpose of the divider phase select function in the AD9524BCPZ-REEL7?
The divider phase select function serves as a jitter-free coarse timing adjustment in increments equal to one-half the period of the signal coming out of the VCO.
- Does the AD9524BCPZ-REEL7 have any storage for user-defined settings?
Yes, the device includes an in-package EEPROM that can be programmed through the serial interface to store user-defined register settings for power-up and chip reset.
- What are some common applications of the AD9524BCPZ-REEL7?
Common applications include LTE and multicarrier GSM base stations, wireless and broadband infrastructure, medical instrumentation, and high-performance instrumentation.
- What is the maximum output frequency of the AD9524BCPZ-REEL7 in LVPECL mode?
The maximum output frequency in LVPECL mode is 1 GHz.
- What is the typical rise and fall time of the output signals in LVPECL mode?
The typical rise and fall time is 147 ps with 100 Ω termination across the output pair.
- How does the AD9524BCPZ-REEL7 ensure low jitter performance?
The device relies on an external VCXO to provide reference jitter cleanup, achieving the restrictive low phase noise requirements necessary for acceptable data converter SNR performance.
