Overview
The ADCLK944BCPZ-R2 is an ultrafast clock fanout buffer designed by Analog Devices Inc. It is fabricated on the proprietary XFCB3 silicon germanium (SiGe) bipolar process, making it ideal for high-speed applications that require low jitter. This device features a differential input with center-tapped, differential, 100 Ω on-chip termination resistors and can accept various input types including dc-coupled LVPECL, CML, 3.3 V CMOS (single-ended), and ac-coupled 1.8 V CMOS, LVDS, and LVPECL inputs. The ADCLK944BCPZ-R2 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 | Conditions |
|---|---|---|
| Supply Voltage (VCC - VEE) | 2.5 V to 3.63 V | - |
| Maximum Operating Temperature | 85°C | - |
| Maximum Junction Temperature | 150°C | - |
| Input Types | dc-coupled LVPECL, CML, 3.3 V CMOS (single-ended), ac-coupled 1.8 V CMOS, LVDS, LVPECL | - |
| Output Type | Four full-swing LVPECL outputs | - |
| Output Voltage Swing | 800 mV each side into 50 Ω terminated to VCC - 2 V | - |
| Maximum Frequency | 7 GHz | - |
| Package Type | 16-lead LFCSP (3mm x 3mm x 0.85mm w/ EP) | - |
Key Features
- Differential input with center-tapped, differential, 100 Ω on-chip termination resistors.
- Supports various input types: dc-coupled LVPECL, CML, 3.3 V CMOS (single-ended), and ac-coupled 1.8 V CMOS, LVDS, and LVPECL.
- Four full-swing LVPECL output drivers designed to directly drive 800 mV each side into 50 Ω terminated to VCC - 2 V.
- Ultra-low jitter performance, optimized for high-speed applications.
- Exposed metal paddle for thermal enhancement and electrical connection.
- Operates over the standard industrial temperature range of -40°C to +85°C.
Applications
The ADCLK944BCPZ-R2 is suitable for various high-speed applications, including:
- Wireless infrastructure
- Instrumentation
- Networking
- Broadband
- Automatic Test Equipment (ATE)
- Other areas demanding predictable clock performance.
Q & A
- What is the ADCLK944BCPZ-R2 used for?
The ADCLK944BCPZ-R2 is an ultrafast clock fanout buffer used in high-speed applications requiring low jitter.
- What types of inputs does the ADCLK944BCPZ-R2 support?
The device supports dc-coupled LVPECL, CML, 3.3 V CMOS (single-ended), and ac-coupled 1.8 V CMOS, LVDS, and LVPECL inputs.
- How many output drivers does the ADCLK944BCPZ-R2 have?
The device features four full-swing LVPECL output drivers.
- What is the maximum operating frequency of the ADCLK944BCPZ-R2?
The maximum specified frequency is 7 GHz.
- What is the operating temperature range of the ADCLK944BCPZ-R2?
The device operates over the standard industrial temperature range of -40°C to +85°C.
- What package type is the ADCLK944BCPZ-R2 available in?
The device is available in a 16-lead LFCSP package.
- How does the exposed metal paddle contribute to the device's performance?
The exposed metal paddle serves both as an electrical connection and a thermal enhancement.
- What are some common applications for the ADCLK944BCPZ-R2?
Common applications include wireless infrastructure, instrumentation, networking, broadband, and ATE.
- How does the ADCLK944BCPZ-R2 minimize jitter?
The device is specifically designed to minimize added random jitter over a wide input slew rate range.
- What is the recommended termination scheme for the LVPECL outputs?
The LVPECL outputs are designed for best transmission line matching, and proper termination schemes such as microstrip or stripline are recommended for high-speed signals.
