Overview
The LMK03318RHSR is an ultra-low-noise PLLATINUM™ clock generator from Texas Instruments, designed to provide high-performance clocking solutions for various applications. This device features a single fractional-N frequency synthesizer with an integrated VCO, flexible clock distribution, and fanout capabilities. It can generate multiple clocks for multi-gigabit serial interfaces and digital devices, reducing the bill of materials (BOM) cost and board area while improving reliability by replacing multiple oscillators and clock distribution devices. The ultra-low jitter of 100-fs RMS typical for frequencies above 100 MHz significantly reduces the bit-error rate (BER) in high-speed serial links.
Key Specifications
| Parameter | Specification |
|---|---|
| Package | WQFN (RHS) with 48 pins |
| Operating Temperature Range | -40°C to 85°C |
| Supply Voltage | 3.3-V core, 1.8-V, 2.5-V, or 3.3-V output supply |
| Jitter | 100-fs RMS typical for FOUT > 100 MHz |
| PSNR | -80 dBc |
| Output Types | Up to 8 AC-LVPECL, AC-LVDS, AC-CML, HCSL, or LVCMOS outputs |
| Input Frequencies | Crystal: 10 to 52 MHz, External: 1 to 300 MHz |
| Frequency Margining | Fine margining using pullable crystal, coarse margining using output dividers |
| Output Frequency Range | Up to 1 GHz |
| Output Phase Synchronization | Supported |
Key Features
- Ultra-low noise and high performance with jitter of 100-fs RMS typical for frequencies above 100 MHz
- Robust supply noise immunity with PSNR of -80 dBc
- Flexible device options with up to 8 AC-LVPECL, AC-LVDS, AC-CML, HCSL, or LVCMOS outputs, or any combination
- Pin mode, I2C mode, and EEPROM mode for configuration
- 71-pin selectable pre-programmed default start-up options
- Dual inputs with automatic or manual selection
- Frequency margining options including fine and coarse margining
- Internal power conditioning for excellent power supply noise rejection
- Self start-up from on-chip programmable EEPROM or pre-defined ROM memory
- I2C-compatible serial interface for programming device registers and EEPROM settings
Applications
- Switches and routers
- Network and telecom line cards
- Servers and storage systems
- Wireless base stations
- PCIe Gen1, Gen2, Gen3, Gen4
- Test and measurement equipment
- Broadcast infrastructure
Q & A
- What is the typical jitter performance of the LMK03318RHSR?
The typical jitter performance is 100-fs RMS for frequencies above 100 MHz. - What are the supported output types for the LMK03318RHSR?
The device supports up to 8 AC-LVPECL, AC-LVDS, AC-CML, HCSL, or LVCMOS outputs, or any combination. - What is the operating temperature range of the LMK03318RHSR?
The operating temperature range is -40°C to 85°C. - How does the LMK03318RHSR handle frequency margining?
The device provides fine frequency margining using a pullable crystal and coarse margining using output dividers. - What are the input frequency ranges for the LMK03318RHSR?
The crystal input range is 10 to 52 MHz, and the external input range is 1 to 300 MHz. - Does the LMK03318RHSR support I2C programming?
Yes, the device supports I2C-compatible serial interface for programming device registers and EEPROM settings. - What is the maximum output frequency supported by the LMK03318RHSR?
The maximum output frequency is up to 1 GHz. - How does the LMK03318RHSR improve power supply noise immunity?
The device features internal power conditioning for excellent power supply noise rejection. - Can the LMK03318RHSR be configured using different modes?
Yes, the device supports pin mode, I2C mode, and EEPROM mode for configuration. - What are some common applications of the LMK03318RHSR?
Common applications include switches and routers, network and telecom line cards, servers and storage systems, wireless base stations, PCIe Gen1-4, test and measurement equipment, and broadcast infrastructure.
