Overview
The LMK04208NKDR, produced by Texas Instruments, is a high-performance clock conditioner designed to provide superior clock jitter cleaning, generation, and distribution. This device features the Dual Loop PLLatinum™ architecture, which ensures ultra-low RMS jitter performance, making it suitable for next-generation system requirements. The LMK04208 is particularly useful in applications where precise clock signals are critical, such as in data converters, wireless infrastructure, and high-speed networking.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| RMS Jitter (12 kHz to 20 MHz) | - | 111 fs | - | fs |
| RMS Jitter (100 Hz to 20 MHz) | - | 123 fs | - | fs |
| Phase Detector Frequency (PLL2) | - | 155 MHz | - | MHz |
| VCO Tuning Range | 2750 MHz | - | 3072 MHz | MHz |
| Operating Temperature Range | -40°C | - | +85°C | °C |
| Supply Voltage Range | 3.15 V | 3.3 V | 3.45 V | V |
| Package Type | - | 64-Pin WQFN | - | - |
| Output Formats | - | LVPECL, LVDS, LVCMOS | - | - |
Key Features
- Ultra-Low RMS Jitter Performance: 111 fs (12 kHz to 20 MHz) and 123 fs (100 Hz to 20 MHz)
- Dual Loop PLLatinum™ Architecture with integrated low-noise crystal oscillator circuit and high-performance VCO
- Two redundant input clocks with automatic and manual switch-over modes
- 50% duty cycle output divides (1 to 1045, even and odd)
- 6 programmable clock outputs (LVPECL, LVDS, or LVCMOS)
- Digital delay: fixed or dynamically adjustable, and 25 ps step analog delay control
- Up to 7 differential outputs, up to 14 single-ended outputs
- Clock rates of up to 1536 MHz
- 0-Delay mode and multi-mode operation (dual PLL, single PLL, and clock distribution)
- Industrial temperature range: -40°C to +85°C
Applications
- Data Converter Clocking
- Wireless Infrastructure
- Networking, SONET/SDH, DSLAM
- Medical, Video, Military, Aerospace
- Test and Measurement
Q & A
- What is the primary function of the LMK04208?
The LMK04208 is a high-performance clock conditioner designed for clock jitter cleaning, generation, and distribution.
- What is the RMS jitter performance of the LMK04208?
The RMS jitter performance is 111 fs (12 kHz to 20 MHz) and 123 fs (100 Hz to 20 MHz).
- What types of output formats does the LMK04208 support?
The LMK04208 supports LVPECL, LVDS, and LVCMOS output formats.
- What is the operating temperature range of the LMK04208?
The operating temperature range is -40°C to +85°C.
- How many programmable clock outputs does the LMK04208 have?
The LMK04208 has 6 programmable clock outputs.
- What is the maximum clock rate supported by the LMK04208?
The maximum clock rate is up to 1536 MHz.
- Does the LMK04208 support redundant input clocks?
Yes, it supports two redundant input clocks with automatic and manual switch-over modes.
- What is the package type of the LMK04208?
The package type is a 64-Pin WQFN.
- What are some of the key applications of the LMK04208?
Key applications include data converter clocking, wireless infrastructure, networking, and test and measurement.
- Does the LMK04208 have a 0-Delay mode?
Yes, the LMK04208 supports a 0-Delay mode.
