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LMH6517SQ
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LMH6517SQ

  • Category:System Basis Chip
  • Product Name:A frequency synthesizer that becomes a VCO
  • Manufacturers:NSC
  • Production Batch Number:10+
  • Encapsulation:SOIC
  • Stock Status:There is stock
  • Stock Quantity:20000
  • Minimum order quantity: 1
  • Details:Click here to find pdf information on the LMH6517SQ
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  • Product introduction

peculiarity

Very low RMS noise and spurs

  • -225 dBc/Hz normalized PLL phase noise
  • Integrated RMS noise (100 Hz - 20 MHz)
  • 2.1 milliradians at 2 GHz (100 Hz - 20 MHz)
  • 3.5 MRAD at 3.5 GHz (100 Hz - 20 MHz)
  • Ultra-low noise integrated VCO
  • External VCO equity (internal VCO bypass)
  • VCO dividers 1 to 63 (all values)
  • Programmable output power
  • Up to 104 MHz phase detection frequency
  • Integrated low noise LDO
  • Programmable charge pump output
  • Partially integrated loop filter
  • Digital frequency shift keying (FSK) modulation pin
  • Comprehensive reference crystal oscillator circuit
  • Hardware and software power loss
  • FastLock mode and VCO-based cycle jump reduction
  • Analog and digital lock detection
  • 1.6 V logic compatibility

illustrate

The LMX2541 is an ultra-low noise synthesizer that integrates a high-performance delta-sigma fractional-N PLL, a VCO that is fully integrated with the tank circuitry, and an optional divider. The phase-locked loop provides an unprecedented normalized noise floor of -225 dBc/Hz and can operate in integer and fractional mode (phase detection rate comparison frequency) up to 104 MHz. The PLL can also be configured with an external VCO.

The LMX2541 integrates several low-noise, high-precision LDO and output driver matching networks to provide higher power supply immunity and more consistent performance while reducing the number of external components. When combined with a high-quality reference oscillator, the LMX2541 produces a very stable, ultra-low noise signal.

The LMX2541 is available in a family of 6 devices that differ from the 1990's VCO frequency range MHz to 4 GHz. The LMX2541 uses a flexible divider that can generate a low frequency of 31.6 MHz. The LMX2541 is a monolithic integrated circuit manufactured on a proprietary BiCMOS process. THE DEVICE IS EASILY PROGRAMMED USING A 3-WIRE MICROWIRE INTERFACE AND CAN BE OPERATED DOWN TO 1.6 VOLTS. The supply voltage ranges from 3.15 to 3.45 volts. The LMX2541 is a 36-pin 6x6x0.8 mm lead-free lead-free leadframe package (LLP).

andLMH6517SQRelated ICs are:


Model Manufacturers lot number encapsulation illustrate
LMH6517SQE NSC 10+ LLP Power, low noise, digitally controlled gain IF and baseband dual 16-bit ADC driver
LMH6517SQ NSC 10+ SOIC A frequency synthesizer that becomes a VCO

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