Overview
The LMX2592RHAR from Texas Instruments is a high-performance, wideband RF phase-locked loop (PLL) with an integrated voltage-controlled oscillator (VCO). This device supports a wide frequency range from 20 MHz to 9.8 GHz, making it suitable for various 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 integrated VCO and PLL noise performance, combined with integrated low-dropout regulators (LDOs), eliminate the need for multiple discrete components in high-performance systems.
The LMX2592RHAR accepts input frequencies up to 1.4 GHz and features programmable frequency dividers and a low-noise multiplier, enabling flexible frequency planning and mitigation of integer boundary spurs. It also supports fast frequency changes with a calibration time of less than 25 µs. The device operates on a single 3.3-V supply and provides two flexible differential outputs that can be configured as single-ended outputs.
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 | |
| Normalized PLL Flicker Noise | -126 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 | 40-Pin WQFN (RHA) |
Key Features
- Output Frequency Range from 20 MHz to 9.8 GHz
- Industry Leading Phase Noise Performance
- Supports both Fractional-N and Integer-N Modes
- Dual Differential Outputs configurable as single-ended outputs
- Programmable Phase Adjustment and Charge Pump Current
- Programmable Output Power Level
- SPI or uWire (4-Wire Serial Interface)
- Innovative Solution to Reduce Spurs
- Fast Calibration Option (< 25 µs)
- Single Power Supply Operation: 3.3 V
Applications
The LMX2592RHAR is suitable for a variety of 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 LMX2592RHAR?
The output frequency range is from 20 MHz to 9.8 GHz.
- What are the supported PLL modes?
The device supports both fractional-N and integer-N modes.
- What is the phase noise performance of the LMX2592RHAR?
The VCO phase noise is -134.5 dBc/Hz at 1-MHz offset for a 6-GHz output.
- What is the RMS jitter for a 6-GHz output?
The RMS jitter is 49 fs (integrated from 12 kHz to 20 MHz).
- What is the maximum input clock frequency?
The maximum input clock frequency is up to 1400 MHz.
- Can the output power level be programmed?
- What is the operating temperature range of the LMX2592RHAR?
The operating temperature range is from -40°C to 85°C.
- What type of interface does the LMX2592RHAR support?
The device supports SPI or uWire (4-Wire Serial Interface).
- How many differential outputs does the LMX2592RHAR have?
The device has two flexible differential outputs that can be configured as single-ended outputs.
- What is the supply voltage for the LMX2592RHAR?
The supply voltage is 3.3 V.
