Overview
The AD9508BCPZ, produced by Analog Devices Inc., is a high-performance clock fanout buffer designed to maximize system performance by minimizing jitter. This device is particularly beneficial in applications requiring precise clocking, such as data converters, direct digital synthesizers (DDS), digital downconverters (DDC), digital upconverters (DUC), and high-performance wireless transceivers. The AD9508BCPZ operates from a single 2.5 V or 3.3 V supply and is available in a 24-lead LFCSP package, with an operating temperature range of −40°C to +85°C.
Key Specifications
| Parameter | Value | Unit | Test Conditions/Comments |
|---|---|---|---|
| Input Clock Frequency | Up to 1.65 GHz | Differential mode | |
| Output Types | LVDS, HSTL, 1.8 V CMOS | LVDS and HSTL up to 1.65 GHz, CMOS up to 250 MHz | |
| Output Dividers | Programmable up to divide by 1024 | Bypassable | |
| Output Phase Adjustment | Coarse phase adjustment between outputs | ||
| Supply Voltage | 2.5 V or 3.3 V | V | |
| Operating Temperature Range | −40°C to +85°C | °C | |
| Package Type | 24-lead LFCSP | ||
| Phase Noise (at 10 kHz offset) | −127 dBc/Hz | dBc/Hz | CLK = 491.52 MHz, OUTx = 491.52 MHz |
Key Features
- Low jitter clock fanout capability to maximize system performance.
- Four independent differential clock outputs with programmable dividers.
- Support for various logic levels: LVDS, HSTL, and 1.8 V CMOS.
- Coarse output phase adjustment between the outputs.
- Pin programmable for fixed configurations at power-up without the need for SPI or I2C programming.
- Operates from a single 2.5 V or 3.3 V supply.
- Temperature range of −40°C to +85°C.
Applications
- Clocking data converters with demanding phase noise and low jitter requirements.
- High-performance wireless transceivers.
- High-performance instrumentation.
- Broadband infrastructure.
- Direct digital synthesizers (DDS), digital downconverters (DDC), and digital upconverters (DUC).
Q & A
- What is the maximum input clock frequency of the AD9508BCPZ?
The maximum input clock frequency is up to 1.65 GHz in differential mode. - What types of output logic levels are supported by the AD9508BCPZ?
The device supports LVDS, HSTL, and 1.8 V CMOS output logic levels. - Can the output dividers be programmed?
Yes, the output dividers are programmable up to divide by 1024 and can be bypassed. - What is the operating supply voltage range of the AD9508BCPZ?
The device operates from a single 2.5 V or 3.3 V supply. - What is the operating temperature range of the AD9508BCPZ?
The operating temperature range is −40°C to +85°C. - What package type is the AD9508BCPZ available in?
The device is available in a 24-lead LFCSP package. - Can the AD9508BCPZ be programmed without using SPI or I2C?
Yes, the device can be pin programmed for various fixed configurations at power-up without the need for SPI or I2C programming. - What are some typical applications of the AD9508BCPZ?
Typical applications include clocking data converters, high-performance wireless transceivers, high-performance instrumentation, and broadband infrastructure. - How many independent differential clock outputs does the AD9508BCPZ have?
The device has four independent differential clock outputs. - What is the phase noise performance of the AD9508BCPZ at 10 kHz offset?
The phase noise performance is −127 dBc/Hz at 10 kHz offset when CLK = 491.52 MHz and OUTx = 491.52 MHz.
