Overview
The ADCLK944BCPZ-R7 is an ultrafast clock fanout buffer produced by Analog Devices Inc. It is fabricated on the proprietary XFCB3 silicon germanium (SiGe) bipolar process, making it suitable for high-speed applications that require low jitter. This device is designed to distribute a differential clock input to four full-swing emitter-coupled logic (ECL) or low-voltage positive emitter-coupled logic (LVPECL) outputs. The ADCLK944BCPZ-R7 is available in a 16-lead LFCSP package and operates over the standard industrial temperature range of -40°C to +85°C.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Supply Voltage | 2.5 V / 3.3 V | VCC - VEE |
| Input Types | LVPECL, CML, 3.3 V CMOS (single-ended), 1.8 V CMOS (ac-coupled), LVDS, LVPECL (ac-coupled) | |
| Output Type | Four LVPECL outputs | Full-swing ECL or LVPECL |
| Output Voltage Swing | 800 mV each side into 50 Ω | Total differential output swing of 1.6 V |
| Package | 16-lead LFCSP | 3mm x 3mm x 0.85mm with exposed pad |
| Operating Temperature | -40°C to +85°C | Standard industrial temperature range |
| Input Termination | Center-tapped, differential, 100 Ω on-chip termination resistors | |
| Maximum Frequency | Up to 7 GHz | Dependent on input signal quality and termination |
Key Features
- Ultrafast Clock Fanout Buffer: Designed for high-speed applications requiring low jitter.
- Flexible Input Compatibility: Accepts dc-coupled LVPECL, CML, 3.3 V CMOS (single-ended), and ac-coupled 1.8 V CMOS, LVDS, and LVPECL inputs.
- Four Full-Swing ECL/LVPECL Outputs: Each output can drive 800 mV into a 50 Ω load, providing a total differential output swing of 1.6 V.
- Low Jitter Performance: Minimizes added random jitter over a wide input slew rate range.
- Thermal Enhancement: Exposed metal paddle for thermal and electrical connection.
- Compact Package: 16-lead LFCSP package with dimensions of 3mm x 3mm x 0.85mm.
Applications
- Wireless Infrastructure: Suitable for high-speed clock distribution in wireless base stations and other infrastructure equipment.
- Instrumentation: Used in high-speed data acquisition and test equipment where precise clocking is essential.
- Networking: Applicable in high-speed networking equipment such as routers, switches, and network interface cards.
- Broadband: Employed in broadband communication systems requiring low jitter clock signals.
- ATE (Automated Test Equipment): Ideal for automated test systems that demand high-speed and low-jitter clock signals.
Q & A
- What is the primary function of the ADCLK944BCPZ-R7?
The ADCLK944BCPZ-R7 is an ultrafast clock fanout buffer designed to distribute a differential clock input to four full-swing ECL or LVPECL outputs.
- What are the supported input types for the ADCLK944BCPZ-R7?
The device supports dc-coupled LVPECL, CML, 3.3 V CMOS (single-ended), and ac-coupled 1.8 V CMOS, LVDS, and LVPECL inputs.
- What is the output voltage swing of the ADCLK944BCPZ-R7?
Each output can drive 800 mV into a 50 Ω load, providing a total differential output swing of 1.6 V.
- What is the maximum operating frequency of the ADCLK944BCPZ-R7?
The device can operate up to 7 GHz, dependent on the quality of the input signal and termination.
- What is the package type and dimensions of the ADCLK944BCPZ-R7?
The device is available in a 16-lead LFCSP package with dimensions of 3mm x 3mm x 0.85mm.
- What is the operating temperature range of the ADCLK944BCPZ-R7?
The device operates over the standard industrial temperature range of -40°C to +85°C.
- How does the ADCLK944BCPZ-R7 minimize jitter?
The device is designed to minimize added random jitter over a wide input slew rate range.
- What is the purpose of the exposed metal paddle in the ADCLK944BCPZ-R7 package?
The exposed metal paddle serves both as an electrical connection and a thermal enhancement.
- In which applications is the ADCLK944BCPZ-R7 commonly used?
The device is commonly used in wireless infrastructure, instrumentation, networking, broadband, and automated test equipment (ATE) where high-speed and low-jitter clock signals are required.
- How should the input signals be terminated for optimal performance?
The input signals should be terminated using center-tapped, differential, 100 Ω on-chip termination resistors. Proper transmission line terminations are also necessary for the outputs.
