Texas Instruments LMX2594 Wideband PLLatinum RF Synthesizer
Texas Instruments LMX2594 Wideband PLLatinum™ RF Synthesizer has integrated VCOs that can generate any frequency from 10MHz to 15GHz without using an internal doubler. This feature eliminates the need for sub-harmonic filters. The high-performance PLL with a figure of merit of –236dBc/Hz and high phase detector frequency can attain very low in-band noise and integrated jitter. The high-speed N-divider has no pre-divider, thus significantly reducing the amplitude and number of spurs. There is also a programmable input multiplier to mitigate integer boundary spurs.
The LMX2594 allows users to synchronize multiple devices' output and enables applications requiring a deterministic delay between input and output. A frequency ramp generator can synthesize up to 2 segments of a ramp in an automatic ramp generation option or a manual option for maximum flexibility. The fast calibration algorithm allows changing frequencies faster than 20µs. The Texas Instruments LMX2594 supports generating or repeating SYSREF (compliant with JESD204B standard), making it an ideal low-noise clock source for high-speed data converters. Fine delay adjustment (9ps resolution) is provided in this configuration to account for delay differences of board traces.
Features
- 10MHz to 15GHz output frequency
- -110dBc/Hz phase noise at 100kHz offset with 15GHz carrier
- 45fs rms Jitter at 7.5GHz (100Hz to 100MHz)
- Programmable output power up to 7dBm at 15GHz
- PLL key specifications
- Figure of merit: -236dBc/Hz
- Normalized 1/f noise: -129dBc/Hz
- High phase detector frequency
- 400MHz integer mode
- 300MHz fractional mode
- 32-bit fractional-N divider
- Remove integer boundary spurs with programmable input multiplier
- Synchronize output phase across multiple devices
- Support for SYSREF with 9ps resolution programmable delay
- Frequency ramp and chirp generation ability for FMCW applications
- < 20µs VCO calibration speed
- 3.3V single power supply operation
Applications
- 5G and mm-wave wireless infrastructure
- Test and measurement equipment
- Radar
- MIMO
- Phased array antennas and beam forming
- High-speed data converter clocking (supports JESD204B)
Simplified Schematic
Related Development Tools
Texas Instruments LMX2594EVM RF Synthesizer Evaluation Module
Evaluates of the performance of the LMX2594, a 15GHz wideband PLLatinum RF synthesizer.
Texas Instruments ADC12DJ5200SEEVM ADC Evaluation Module
Used to evaluate the ADC12DJ5200RF, ADC12DJ4000RF, and ADC08DJ5200RF analog-to-digital converters.