LMX2541SQE2690E

• - Normalized PLL phase noise of 225 dBc/Hz
• Integrated RMS noise (100 Hz - 20 MHz)
• 2 milliradians at 2.1 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 crossover 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 pins
• Comprehensive reference crystal oscillator circuit
• Hardware and software power outages
• FastLock mode and VCO-based cycle hop reduction
• Analog and digital lockout detection
• 1.6 V Logic Compatibility

illustrate

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

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

LMX2541 is a home of 6 devices that offers different VCO frequency ranges from MHz to 4 GHz from 1990. LMX2541 uses a flexible crossover that can produce a low frequency of 31.6 MHz. LMX2541 is a monolithic integrated circuit manufactured on a proprietary BiCMOS process. The device is easy to program using a three-wire MICROWIRE interface that can be operated down to 1.6 volts. The supply voltage ranges from 3.15 to 3.45 volts. LMX2541 is a 36-pin 6x6x0.8 mm lead-free lead-free lead frame package (LLP).