TI LMX2582RHAR

The LMX2582 is a low-noise, wideband RF PLL with an integrated VCO, supporting a frequency range from 20 MHz to 5.5 GHz. This device supports both fractional-N and integer-N modes and features a 32-bit fractional divider, allowing for the selection of appropriate frequencies. Its integrated noise is 47 fs (for a 1.8 GHz output), making it an ideal low-noise source.

This device incorporates state-of-the-art PLL and VCO integrated noise along with an integrated low-dropout regulator (LDO), eliminating the need for multiple discrete components in high-performance systems. It can accept input frequencies up to 1.4 GHz and, when combined with the divider and programmable low-noise multiplier, offers flexible frequency setting. The additional programmable low-noise multiplier helps users mitigate the effects of integer boundary spurs.

In fractional-N mode, the device can adjust the output phase with 32-bit resolution. For applications requiring rapid frequency changes, the device supports a fast calibration option with a duration of less than 25 µs. This performance can be achieved using a single 3.3 V power supply.

The device supports two differential outputs, which can also be flexibly configured as single-ended outputs. Users can choose to program one output from the VCO and the other from the channel distributor. Each output can be disabled if not needed.

• Output frequency range: 20 to 5500MHz
• Industry-leading phase noise performance
• VCO phase noise: –144.5dBc/Hz at 1.8GHz output with 1MHz offset
• Normalized PLL floor noise: -231dBc/Hz
• Normalized PLL flicker noise: -126dBc/Hz
• 47fs RMS jitter (12kHz to 20MHz) (for 1.8GHz output)
• Input clock frequency up to 1400MHz
• Phase detector frequency up to 200MHz, and up to 400MHz in integer-N mode
• Fractional-N and integer-N mode support
• Dual differential outputs
• Innovative glitch reduction solution
• Programmable phase adjustment
• Programmable charge pump current
• Programmable output power levels
• SPI or uWire (4-wire serial interface)
• Single-supply operation: 3.3V

• Test and measurement equipment
• Cellular base stations
• Microwave backhaul
• High-performance clock source for high-speed data converters
• Software-defined radio