Overview
The AD9508SCPZ-EP-R7, produced by Analog Devices Inc., is a high-performance 1.65 GHz clock fanout buffer designed to maximize system performance by minimizing jitter. This device is particularly beneficial for applications requiring precise clocking, such as data converters, high-performance wireless transceivers, and broadband infrastructure. The AD9508 provides four independent differential clock outputs with various logic levels, including LVDS, HSTL, and 1.8 V CMOS. It operates from a single 2.5 V or 3.3 V supply and is available in a 24-lead LFCSP package.
Key Specifications
| Parameter | Value | Unit | Comments |
|---|---|---|---|
| Input Clock Frequency | Up to 1.65 GHz | GHz | Differential mode |
| Output Logic Types | LVDS, HSTL, 1.8 V CMOS | - | - |
| Output Frequency (CMOS) | Up to 250 MHz | MHz | 1.8 V CMOS mode |
| Output Divider Range | 1 to 1024 | - | Programmable divider for each output |
| Supply Voltage | 2.5 V or 3.3 V | V | Single supply operation |
| Temperature Range | −40°C to +85°C | °C | Ambient temperature range |
| Package Type | 24-Lead LFCSP | - | 4mm x 4mm with EP |
Key Features
- Low jitter design to maximize system performance.
- Four independent differential clock outputs with programmable dividers (1 to 1024).
- Support for various logic levels: LVDS (1.65 GHz), HSTL (1.65 GHz), and 1.8 V CMOS (250 MHz).
- Coarse output phase adjustment between outputs.
- Pin programmable for fixed configurations at power-up without SPI or I2C programming.
- Single supply operation: 2.5 V or 3.3 V.
- Operating temperature range: −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.
- DACs, DDSs, DDCs, DUCs, and MxFEs.
Q & A
- What is the maximum input clock frequency of the AD9508?
The AD9508 can handle input clock frequencies up to 1.65 GHz in differential mode.
- What types of logic levels are supported by the AD9508?
The AD9508 supports LVDS, HSTL, and 1.8 V CMOS logic levels.
- What is the range of the programmable output dividers?
The output dividers can be set to divide by any integer from 1 to 1024.
- Can the AD9508 be programmed without using SPI or I2C?
Yes, the AD9508 can be pin programmed for various fixed configurations at power-up without the need for SPI or I2C programming.
- What is the operating supply voltage range for the AD9508?
The AD9508 operates from a single 2.5 V or 3.3 V supply.
- What is the temperature range for the AD9508?
The AD9508 operates within an ambient temperature range of −40°C to +85°C.
- In what package type is the AD9508 available?
The AD9508 is available in a 24-lead LFCSP package (4mm x 4mm with EP).
- What are some typical applications of the AD9508?
The AD9508 is used in applications such as clocking data converters, high-performance wireless transceivers, high-performance instrumentation, and broadband infrastructure.
- How does the AD9508 manage jitter?
The AD9508 is designed to minimize jitter to maximize system performance, making it suitable for applications requiring low jitter.
- Can the AD9508 adjust the phase of its outputs?
Yes, the AD9508 supports coarse output phase adjustment between the outputs.
