Overview
The LMX2820RTCT, manufactured by Texas Instruments, is a high-performance, wideband RF synthesizer designed to generate frequencies across a broad range from 45 MHz to 22.6 GHz. This device is part of the LMX2820 series and is known for its excellent phase noise performance and versatility in various applications. The LMX2820RTCT integrates a fully functional phase-locked loop (PLL) with a phase frequency detector, charge pump, and loop filter, making it a comprehensive solution for precision frequency synthesis.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Frequency Range | 45 MHz to 22.6 GHz | |
| RMS Jitter (at 6 GHz, 10 kHz - 20 MHz) | 40 fs | |
| Phase Detector Frequency | Up to 400 MHz | |
| Supply Voltage | 3.15 V to 3.45 V | V |
| Operating Temperature | -40 °C to 85 °C | °C |
| Package Type | VQFN-48 | |
| Package Size | 7 mm x 7 mm | mm |
Key Features
- Precision frequency synthesis with a high-performance PLL and a figure of merit of –236 dBc/Hz.
- Support for external VCO up to 22.6 GHz, allowing for improved phase noise performance.
- Phase synchronization across multiple devices, enabling coherent operation in complex systems.
- JESD204B compliant SYSREF signal generation and buffering, suitable for high-speed data converters.
- Rapid PLL calibration time of less than 5 µs, facilitating fast frequency hopping in dynamic systems.
- Digital input for offset mixing, reducing spurious transmission.
- Integrated LDOs eliminating the need for onboard low-noise LDOs.
- Two differential RF outputs and one differential SYSREF output.
Applications
- Radar and electronic warfare systems, benefiting from the high phase noise performance and wide frequency range.
- 5G and mm-Wave wireless infrastructure, where precise frequency synthesis is crucial.
- Microwave backhaul, requiring stable and low-noise frequency sources.
- Test and measurement equipment, where the device's high performance and flexibility are advantageous.
- High-speed data converter clocking, leveraging the JESD204B compliant SYSREF signal generation.
Q & A
- What is the output frequency range of the LMX2820RTCT?
The LMX2820RTCT can generate frequencies from 45 MHz to 22.6 GHz.
- What is the RMS jitter performance of the LMX2820RTCT at 6 GHz?
The RMS jitter is approximately 40 fs over the 10 kHz to 20 MHz frequency range.
- Can the LMX2820RTCT support external VCOs?
Yes, it supports external VCOs up to 22.6 GHz for improved phase noise performance.
- What is the phase detector frequency limit of the LMX2820RTCT?
The phase detector frequency can go up to 400 MHz.
- Does the LMX2820RTCT support JESD204B compliant SYSREF signals?
Yes, it supports JESD204B compliant SYSREF signal generation and buffering.
- What is the typical calibration time for the PLL in the LMX2820RTCT?
The PLL calibration time is less than 5 µs.
- What is the operating temperature range of the LMX2820RTCT?
The device operates from -40 °C to 85 °C.
- What package type and size does the LMX2820RTCT come in?
The LMX2820RTCT comes in a VQFN-48 package, measuring 7 mm x 7 mm.
- Can the LMX2820RTCT be used in radar and electronic warfare applications?
Yes, it is suitable for these applications due to its high phase noise performance and wide frequency range.
- How does the LMX2820RTCT simplify integration into existing systems?
The device simplifies integration through its fully integrated PLL and 3-wire serial interface for seamless programming and control.
