Texas Instruments LMX2582 Wideband PLLatinum RF Synthesizer

Texas Instruments LMX2582 Wideband PLLatinum RF Synthesizer is a low-noise, wideband RF PLL with integrated VCO that supports a frequency range from 20MHz to 5.5GHz. The device supports both fractional-N and integer-N modes, with a 32-bit fractional divider allowing fine frequency selection. Integrated noise of 47fs for 1.8GHz output makes it an ideal low noise source. Combining best-in-class PLL and integrated VCO noise with integrated LDOs, this device removes the need for multiple discrete devices in high performance systems. The device accepts input frequencies up to 1.4GHz, which combined with frequency dividers and programmable low noise multiplier allows flexible frequency planning. The additional programmable low noise multiplier lets users mitigate the impact of integer boundary spurs. In Fractional-N mode, the device can adjust the output phase by a 32-bit resolution.

Features

  • Output frequency range from 20MHz to 5500MHz
  • Industry-leading phase noise performance
    • -144.5dBc/Hz at 1MHz Offset for 1.8GHz output VCO phase noise
    • -231dBc/Hz Normalized PLL noise floor
    • 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
  • Supports fractional-N and integer-N modes
  • Dual differential outputs
  • An innovative solution to reduce spurs
  • < 25µs Fast calibration mode
  • Programmable phase adjustment
  • Programmable charge pump current
  • Programmable output power level
  • SPI or µWire (4-Wire serial interface)
  • 3.3V Single power supply operation

Applications

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

Simplified Schematic

Schematic - Texas Instruments LMX2582 Wideband PLLatinum RF Synthesizer
發佈日期: 2016-04-04 | 更新日期: 2024-04-24