Overview
The CDCLVD1212RHAT is a 2:12 low additive jitter LVDS buffer produced by Texas Instruments. This device is designed to distribute one of two selectable clock inputs to 12 pairs of differential LVDS clock outputs, ensuring minimal skew for optimal clock distribution. It supports input frequencies up to 800 MHz and is compatible with LVDS, LVPECL, and LVCMOS input signals. The CDCLVD1212RHAT operates within a 2.5-V supply environment and is characterized over an industrial temperature range of –40°C to 85°C. It is packaged in a 6-mm × 6-mm, 40-pin VQFN (RHA) package, making it suitable for a variety of applications requiring precise clock signal distribution.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Input Type | Acceptable input signals | LVDS, LVPECL, LVCMOS |
| Input Selection | Method of selecting input clock | Through control pin (IN_SEL) |
| Output Type | Output signal type | Differential LVDS |
| Number of Outputs | Number of LVDS output pairs | 12 pairs |
| Maximum Clock Frequency | Maximum input clock frequency | Up to 800 MHz |
| Output Skew | Maximum output skew | 35 ps |
| Additive Jitter | RMS additive jitter in 10 kHz to 20 MHz range | < 300 fs |
| Power Supply | Device power supply voltage range | 2.375 V to 2.625 V |
| Temperature Range | Operating temperature range | –40°C to 85°C |
| Package Type | Package type and size | 6-mm × 6-mm, 40-pin VQFN (RHA) |
| ESD Protection | ESD protection levels | Exceeds 3-kV HBM, 1-kV CDM |
Key Features
- Low Additive Jitter: Less than 300 fs RMS in the 10 kHz to 20 MHz range, ensuring high signal integrity.
- Low Output Skew: Maximum output skew of 35 ps, which is crucial for precise clock distribution.
- Universal Inputs: Accepts LVDS, LVPECL, and LVCMOS input signals, providing flexibility in system design.
- Selectable Clock Inputs: Allows selection of one of two input clocks through the IN_SEL control pin.
- LVDS Reference Voltage: Provides VAC_REF for capacitive coupled inputs, enhancing signal quality.
- Fail-Safe Function: Incorporates input hysteresis to prevent random oscillation of outputs in the absence of an input signal.
- Compact Packaging: Packaged in a small 6-mm × 6-mm, 40-pin VQFN (RHA) package, suitable for space-constrained designs.
Applications
- Telecommunications and Networking: Ideal for clock distribution in high-speed communication systems.
- Medical Imaging: Used in medical imaging equipment requiring precise clock signals.
- Test and Measurement Equipment: Suitable for test and measurement applications needing low jitter clock signals.
- Wireless Communications: Applicable in wireless communication systems requiring high signal integrity.
- General-Purpose Clocking: Can be used in various general-purpose clocking applications where low jitter is critical.
Q & A
- What is the maximum clock frequency supported by the CDCLVD1212RHAT?
The CDCLVD1212RHAT supports clock frequencies up to 800 MHz.
- What types of input signals does the CDCLVD1212RHAT accept?
The device accepts LVDS, LVPECL, and LVCMOS input signals.
- How many LVDS output pairs does the CDCLVD1212RHAT provide?
The device provides 12 pairs of differential LVDS clock outputs.
- What is the maximum output skew of the CDCLVD1212RHAT?
The maximum output skew is 35 ps.
- What is the additive jitter of the CDCLVD1212RHAT in the 10 kHz to 20 MHz range?
The additive jitter is less than 300 fs RMS.
- What is the operating temperature range of the CDCLVD1212RHAT?
The device operates over a temperature range of –40°C to 85°C.
- What type of package is the CDCLVD1212RHAT available in?
The device is packaged in a 6-mm × 6-mm, 40-pin VQFN (RHA) package.
- Does the CDCLVD1212RHAT have ESD protection?
Yes, it exceeds 3-kV HBM and 1-kV CDM ESD protection levels.
- How does the CDCLVD1212RHAT handle input signal absence?
The device incorporates input hysteresis to prevent random oscillation of outputs in the absence of an input signal.
- What are some common applications of the CDCLVD1212RHAT?
Common applications include telecommunications, medical imaging, test and measurement equipment, wireless communications, and general-purpose clocking.
