Overview
The LMX2594RHAR is a high-performance, wideband synthesizer produced by Texas Instruments. This device is capable of generating any frequency from 10 MHz to 15 GHz without the need for an internal doubler, thereby eliminating the requirement for sub-harmonic filters. The LMX2594 features a high-performance PLL with a figure of merit of –236 dBc/Hz and a high-phase detector frequency, enabling very low in-band noise and integrated jitter. It operates from a single 3.3-V power supply and includes integrated LDOs, which eliminate the need for external low-noise LDOs.
Key Specifications
| Specification | Value |
|---|---|
| Output Frequency Range | 10 MHz to 15 GHz |
| Phase Noise at 100-kHz Offset with 15-GHz Carrier | –110 dBc/Hz |
| RMS Jitter at 7.5 GHz (100 Hz to 100 MHz) | 45 fs |
| Figure of Merit | –236 dBc/Hz |
| Normalized 1/f Noise | –129 dBc/Hz |
| Phase Detector Frequency | High-phase detector frequency |
| Integer Mode | Up to 400 MHz |
| Fractional Mode | Up to 300 MHz |
| Fractional-N Divider | 32-bit |
| Output Power | Up to 7 dBm at 15 GHz |
| Power Supply | Single 3.3 V |
| Package Type | VQFN (40 pins), 6.00 mm × 6.00 mm |
| Operating Temperature Range | –40°C to 85°C |
Key Features
- High-performance PLL with low in-band noise and integrated jitter
- Programmable output power and input multiplier to mitigate integer boundary spurs
- Synchronization of output phase across multiple devices
- Support for SYSREF with 9-ps resolution programmable delay, compliant to JESD204B standard
- Frequency ramp and chirp generation ability for FMCW applications
- Fast VCO calibration speed of less than 20 µs
- Integrated LDOs eliminating the need for on-board low-noise LDOs
- Single 3.3-V power supply operation
Applications
- High-speed data converters requiring low-noise clock sources
- Frequency Modulated Continuous Wave (FMCW) radar systems
- Wireless communication systems, including 5G and satellite communications
- Test and measurement equipment
- Medical imaging and diagnostic equipment
Q & A
- What is the output frequency range of the LMX2594RHAR?
The output frequency range of the LMX2594RHAR is from 10 MHz to 15 GHz.
- What is the phase noise performance of the LMX2594RHAR at 100-kHz offset with a 15-GHz carrier?
The phase noise performance is –110 dBc/Hz at 100-kHz offset with a 15-GHz carrier.
- What is the RMS jitter of the LMX2594RHAR at 7.5 GHz?
The RMS jitter is 45 fs at 7.5 GHz (100 Hz to 100 MHz).
- Does the LMX2594RHAR support SYSREF generation?
Yes, the LMX2594RHAR supports SYSREF generation with 9-ps resolution programmable delay, compliant to JESD204B standard.
- What is the power supply requirement for the LMX2594RHAR?
The LMX2594RHAR operates from a single 3.3-V power supply.
- What is the package type and size of the LMX2594RHAR?
The package type is VQFN with 40 pins, and the size is 6.00 mm × 6.00 mm.
- What is the operating temperature range of the LMX2594RHAR?
The operating temperature range is –40°C to 85°C.
- Can the LMX2594RHAR synchronize the output phase across multiple devices?
Yes, the LMX2594RHAR can synchronize the output phase across multiple devices.
- What is the VCO calibration speed of the LMX2594RHAR?
The VCO calibration speed is less than 20 µs.
- Does the LMX2594RHAR have integrated LDOs?
Yes, the LMX2594RHAR has integrated LDOs that eliminate the need for on-board low-noise LDOs.
