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The LMX2491RTWR is a 6.4GHz low-noise RF PLL with ramp/linear FM generation capabilities, widely used in various flexible ramp functions, including FSK, PSK, and up to 8 segments of configurable segmented linear FM modulation profiles.

The characteristics of LMX2491RTWR

Standardized phase-locked loop (PLL) noise of -227 DBC /Hz

Broadband PLL from 500MHz to 6.4GHz

3.15V to 5.25V charge pump PLL power supply

Multi-purpose slope/ultra-wideband signal source generation function

Maximum phase detector frequency of 200MHz

Frequency shift Keying/Phase shift keying (FSK/PSK) modulation pins

Digital lock detection

3.3V single power supply

Overview of LMX2491

The LMX2491RTWR device is a low-noise 6.4GHz wideband Δ-Σ fractional N PLL with ramp/linear frequency modulation generation function. It consists of a phase-frequency detector, a programmable charge pump and a high-frequency input suitable for an external VCO. The LMX2491RTWR widely supports various flexible ramp functions, including FSK, PSK, and up to 8 configurable segmented linear FM modulation profiles.

The LMX2491RTWR features precise PLL resolution and rapid ramp function, with a phase detector rate up to 200MHz. The LMX2491RTWR allows reading back any of its registers. The LMX2491 can operate with a single 3.3V power supply. In addition, this device supports charge pumps with voltages up to 5.25V, providing a simple solution for improved phase noise performance without the need for an external amplifier.

Technical Specification

The main specifications of LMX2491RTWR are as follows:

Type: Frequency Synthesizer (RF

PLL: Yes

Input: Clock

Output: Clock

Number of circuits: 1

Ratio - Input: Output: 2:1

Differential - Input: Output: None/None

Frequency - Maximum: 6.4GHz

Frequency divider/frequency multiplier: Yes/Yes

Voltage - Power supply: 3.15V to 3.45V

Operating temperature: -40°C to 125°C

Installation type: Surface mount type

Device packaging: 24-WQFN (4x5)

Application scenarios

The LMX2491RTWR is suitable for a variety of application scenarios, including:

• Frequency Modulated Continuous Wave (FMCW) radar

• Military radar

• Microwave return stroke

• Testing and measurement

• Satellite communication

• Wireless infrastructure

• Sampling clocks suitable for high-speed analog-to-digital converters/digital-to-analog converters (ADC/DAC)

Immediate inquiry: Welcome to visit the official website of Mingjiada Electronics (www.hkmjd.com) to check the inventory status and product quotation of LMX2491RTWR online.