LMX2541 - 具有集成 VCO 的超低噪声 PLLatinum 频率合成器

LMX2541是TI德州仪器公司的一款无产品，LMX2541是具有集成 VCO 的超低噪声 PLLatinum 频率合成器，本站介绍了LMX2541的封装应用图解、特点和优点、功能等，并给出了与LMX2541相关的TI元器件型号供参考。

LMX2541 - 具有集成 VCO 的超低噪声 PLLatinum 频率合成器 - 无 - RFPPL与合成器 - 德州仪器

产品特性

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 to 20 MHz)
- 2 mRad (100 Hz to 20 MHz) at 2.1 GHz
- 3.5 mRad (100 Hz to 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

2 Applications

Wireless Infrastructure (UMTS, LTE, WiMax)
Broadband Wireless
Wireless Meter Reading
Test and Measurement
FM Mobile Radio

产品说明

The LMX2541 device 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.

产品器件信息

PART NUMBER	PACKAGE	VCO FREQUENCY (MHz)
LMX2541SQ2060E	WQFN (36)	1990 - 2240
LMX2541SQ2380E	WQFN (36)	2200 - 2530
LMX2541SQ2690E	WQFN (36)	2490 - 2865
LMX2541SQ3030E	WQFN (36)	2810 - 3230
LMX2541SQ3320E	WQFN (36)	3130 - 3600
LMX2541SQ3740E	WQFN (36)	3480 - 4000

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