TRF3761-A - Low Noise Integer N PLL Frequency Synthesizer With Integrated VCO

TRF3761 is a family of high performance, highly integrated frequency synthesizers, optimized for high performance applications. The TRF3761 includes a low-noise, voltage-controlled oscillator (VCO) and an integer-N PLL.

TRF3761 integrates divide-by 1, 2, or 4 options for a more flexible output frequency range. It is controlled through a 3-wire serial-programming-interface (SPI) interface. For power sensitive applications the TRF3761 can be powered down by the SPI interface or externally via chip_en pin 2.

• Fully Integrated VCO
• Low Phase Noise: –137dBc/Hz (at 600kHz, f_VCO
  of 1.9GHz)
• Low Noise Floor: –158dBc/Hz at 10MHz Offset
• Integer-N PLL
• Input Reference Frequency range: 10MHz to
  104MHz
• VCO Frequency Divided by 2-4 Output
• Output Buffer Enable Pin
• Programmable Charge Pump Current
• Hardware and Software Power Down
• 3-Wire Serial Interface
• Single Supply: 4.5V to 5.25V Operation