LMX2541

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具有集成 VCO 的超低噪声 PLLatinum 频率合成器

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数据表

LMX2541

正在供货

数据表

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产品详细信息

Integrated VCO

Yes

Output frequency (Min) (MHz)

32

Output frequency (Max) (MHz)

4000

Normalized PLL phase noise (dBc/Hz)

-226

Current consumption (mA)

120

1/f noise (10-kHz offset at 1-GHz carrier) (dBc/Hz)

-125

Integrated VCO

Yes

Output frequency (Min) (MHz)

32

Output frequency (Max) (MHz)

4000

Normalized PLL phase noise (dBc/Hz)

-226

Current consumption (mA)

120

1/f noise (10-kHz offset at 1-GHz carrier) (dBc/Hz)

-125

Multiple Frequency Options Available
(See Device Comparison Table)
Frequencies from 31.6 MHz to 4000 MHz
Very Low RMS Noise and Spurs
–225 dBc/Hz Normalized PLL Phase Noise
Integrated RMS Noise (100 Hz – 20 MHz)
- 2 mRad (100 Hz – 20 MHz) at 2.1 GHz
- 3.5 mRad (100 Hz - 20 MHz) at 3.5 GHz
Ultra Low-Noise Integrated VCO
External VCO Option (Internal VCO Bypassed)
VCO Frequency Divider 1 to 63 (all values)
Programmable Output Power
Up to 104-MHz Phase Detector Frequency
Integrated Low-Noise LDOs
Programmable Charge Pump Output
Partially Integrated Loop Filter
Digital Frequency Shift Keying (FSK) Modulation Pin
Integrated Reference Crystal Oscillator Circuit
Hardware and Software Power Down
FastLock Mode and VCO-Based Cycle Slip Reduction
Analog and Digital Lock Detect
1.6-V Logic Compatibility

Multiple Frequency Options Available
(See Device Comparison Table)
Frequencies from 31.6 MHz to 4000 MHz
Very Low RMS Noise and Spurs
–225 dBc/Hz Normalized PLL Phase Noise
Integrated RMS Noise (100 Hz – 20 MHz)
- 2 mRad (100 Hz – 20 MHz) at 2.1 GHz
- 3.5 mRad (100 Hz - 20 MHz) at 3.5 GHz
Ultra Low-Noise Integrated VCO
External VCO Option (Internal VCO Bypassed)
VCO Frequency Divider 1 to 63 (all values)
Programmable Output Power
Up to 104-MHz Phase Detector Frequency
Integrated Low-Noise LDOs
Programmable Charge Pump Output
Partially Integrated Loop Filter
Digital Frequency Shift Keying (FSK) Modulation Pin
Integrated Reference Crystal Oscillator Circuit
Hardware and Software Power Down
FastLock Mode and VCO-Based Cycle Slip Reduction
Analog and Digital Lock Detect
1.6-V Logic Compatibility

The LMX2541 is an ultra low-noise frequency synthesizer which integrates a high performance delta-sigma fractional N PLL, a VCO with fully integrated tank circuit, and an optional frequency divider. The PLL offers an unprecedented normalized noise floor of -225 dBc/Hz and can be operated with up to 104 MHz of phase-detector rate (comparison frequency) in both integer and fractional modes. The PLL can also be configured to work with an external VCO.

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

The LMX2541 is offered in a family of 6 devices with varying VCO frequency range from 1990 MHz up to 4 GHz. Using a flexible divider, the LMX2541 can generate frequencies as low as 31.6 MHz.

The LMX2541 is a monolithic integrated circuit, fabricated in a proprietary BiCMOS process. Device programming is facilitated using a three-wire MICROWIRE interface that can operate down to 1.6 volts. Supply voltage ranges from 3.15 V to 3.45 V. The LMX2541 is available in a 36-pin 6-mm × 6-mm × 0.8-mm WQFN Package.

The LMX2541 is an ultra low-noise frequency synthesizer which integrates a high performance delta-sigma fractional N PLL, a VCO with fully integrated tank circuit, and an optional frequency divider. The PLL offers an unprecedented normalized noise floor of -225 dBc/Hz and can be operated with up to 104 MHz of phase-detector rate (comparison frequency) in both integer and fractional modes. The PLL can also be configured to work with an external VCO.

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

The LMX2541 is offered in a family of 6 devices with varying VCO frequency range from 1990 MHz up to 4 GHz. Using a flexible divider, the LMX2541 can generate frequencies as low as 31.6 MHz.

The LMX2541 is a monolithic integrated circuit, fabricated in a proprietary BiCMOS process. Device programming is facilitated using a three-wire MICROWIRE interface that can operate down to 1.6 volts. Supply voltage ranges from 3.15 V to 3.45 V. The LMX2541 is available in a 36-pin 6-mm × 6-mm × 0.8-mm WQFN Package.

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	类型	项目标题		日期
*	数据表	LMX2541 Ultra-Low Noise PLLatinum Frequency Synthesizer With Integrated VCO 数据表 (Rev. J)	PDF \| HTML	31 Dec 2014
	EVM 用户指南	LMX2541xxxx Evaluation Board User's Guide (Rev. B)		06 Oct 2014
	设计指南	适用于 Xilinx FPGA 的模拟器件解决方案指南		24 Apr 2012