Overview
The LMX2572LP is a low-power, high-performance wideband RF synthesizer produced by Texas Instruments. This device is capable of generating frequencies from 12.5 MHz to 2 GHz without the use of an internal doubler. It is designed to deliver excellent performance while consuming minimal power, making it ideal for various wireless and communication applications. The LMX2572LP operates on a single 3-V to 3.5-V power supply and integrates low-dropout regulators (LDOs), eliminating the need for external low-noise LDOs. The device supports advanced features such as phase synchronization, FSK modulation, and fast VCO calibration, making it versatile for a range of use cases.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Frequency Range | 12.5 MHz to 2 GHz | |
| Power Consumption | 70 mA | at 3.3-V supply |
| Phase Noise at 100-kHz Offset | –124 dBc/Hz | with 800-MHz carrier |
| PLL Figure of Merit | –232 dBc/Hz | |
| PLL Normalized 1/f Noise | –123.5 dBc/Hz | |
| Divider Type | 32-Bit Fractional-N | |
| Power Supply Voltage | 3-V to 3.5-V | |
| Operating Temperature Range | –40°C to 85°C | |
| VCO Calibration Speed | < 20 µs |
Key Features
- Support for FSK direct digital modulation, including discrete level FSK and pulse-shaping FSK.
- Synchronization of output phase across multiple devices.
- Support for ramp and chirp functions with up to two segments of ramp generation.
- Fast VCO calibration speed of less than 20 µs.
- Two programmable output power level differential outputs.
- Remove integer boundary spurs with programmable input multiplier.
- Integrated LDOs from a single 3.3-V supply, eliminating the need for onboard low-noise LDOs.
- Digital logic interface compatible with 1.8-V input.
Applications
- Test and measurement equipment.
- Digital 2-way radios.
- Low power radio communication systems.
- Satellite communication.
- Wireless microphones.
- Proprietary wireless connectivity.
- MIMO (Multiple-Input Multiple-Output) systems.
- RADAR systems.
- High-speed data converter clocking.
Q & A
- What is the output frequency range of the LMX2572LP?
The LMX2572LP can generate frequencies from 12.5 MHz to 2 GHz.
- How much power does the LMX2572LP consume?
The device consumes 70 mA at a 3.3-V supply.
- What is the phase noise performance of the LMX2572LP?
The phase noise is –124 dBc/Hz at a 100-kHz offset with an 800-MHz carrier.
- Does the LMX2572LP support FSK modulation?
- Can the LMX2572LP synchronize the output phase across multiple devices?
- What is the VCO calibration speed of the LMX2572LP?
- What type of divider does the LMX2572LP use?
- What is the operating temperature range of the LMX2572LP?
- Does the LMX2572LP require external low-noise LDOs?
- What are some common applications of the LMX2572LP?
