Overview
The LMX2592RHAT, produced by Texas Instruments, is a high-performance, wideband RF phase-locked loop (PLL) with an integrated voltage-controlled oscillator (VCO). This device supports a frequency range from 20 MHz to 9.8 GHz, making it suitable for a variety of high-frequency applications. It operates in both fractional-N and integer-N modes, allowing for fine frequency selection with a 32-bit fractional divider. The LMX2592RHAT is designed to provide low noise, with integrated noise of 49 fs for a 6-GHz output, and features best-in-class PLL and VCO noise performance. It is powered by a single 3.3-V supply and includes integrated low-dropout regulators (LDOs), reducing the need for multiple discrete devices in high-performance systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Frequency Range | 20 MHz to 9.8 GHz | |
| VCO Phase Noise | –134.5 dBc/Hz at 1-MHz Offset for 6-GHz Output | |
| Normalized PLL Noise Floor | –231 dBc/Hz | |
| RMS Jitter (12 kHz to 20 MHz) for 6 GHz Output | 49 fs | |
| Input Clock Frequency | Up to 1400 MHz | |
| Phase Detector Frequency | Up to 200 MHz, and Up to 400 MHz in Integer-N Mode | |
| Operating Temperature Range | –40°C to 85°C | |
| Supply Voltage | 3.3 V | |
| Package Type | VQFN (RHA) with 40 pins |
Key Features
- Industry-leading phase noise performance with VCO phase noise of –134.5 dBc/Hz at 1-MHz offset for 6-GHz output and a normalized PLL noise floor of –231 dBc/Hz.
- Supports both fractional-N and integer-N modes with a 32-bit fractional divider for fine frequency selection.
- Programmable phase adjustment and charge pump current.
- Programmable output power level and low-noise multiplier to mitigate integer boundary spurs.
- Dual differential outputs that can be configured as single-ended outputs, with each output capable of being muted separately.
- Fast calibration option for applications requiring fast frequency changes, taking less than 25 µs.
- SPI or uWire (4-Wire Serial Interface) for user programming.
- Single power supply operation at 3.3 V with integrated LDOs.
Applications
The LMX2592RHAT is suitable for various high-frequency applications, including:
- Satellite Communications
- Wireless Infrastructure
- Radar Systems
- Test and Measurement Equipment
- High-Performance RF Systems
Q & A
- What is the output frequency range of the LMX2592RHAT?
The output frequency range is from 20 MHz to 9.8 GHz.
- What are the operating modes of the LMX2592RHAT?
The device supports both fractional-N and integer-N modes.
- What is the phase noise performance of the LMX2592RHAT?
The VCO phase noise is –134.5 dBc/Hz at 1-MHz offset for a 6-GHz output, and the normalized PLL noise floor is –231 dBc/Hz.
- What is the input clock frequency range of the LMX2592RHAT?
The input clock frequency can be up to 1400 MHz.
- How many outputs does the LMX2592RHAT have, and can they be configured?
The device has two flexible differential outputs that can be configured as single-ended outputs. Each output can be muted separately.
- What is the supply voltage of the LMX2592RHAT?
The device operates on a single 3.3-V supply.
- What is the operating temperature range of the LMX2592RHAT?
The operating temperature range is from –40°C to 85°C.
- Does the LMX2592RHAT support fast frequency changes?
Yes, it supports a fast calibration option that takes less than 25 µs.
- What interfaces are available for user programming?
The device supports SPI or uWire (4-Wire Serial Interface) for user programming.
- What is the package type of the LMX2592RHAT?
The device is packaged in a VQFN (RHA) with 40 pins.
