LMX2595RHAR

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1. Describe

The LMX2595RHAR is a high performance wideband synthesizer capable of generating any frequency from 10 MHz to 20 GHz. Integrated frequency multiplier for frequencies above 15 GHz. A high-performance PLL with a –236 dBc/Hz figure of merit and high phase detector frequency results in very low in-band noise and integrated jitter. The high-speed N-divider has no prescaler, thus significantly reducing the magnitude and number of spurs. There is also a programmable input multiplier to mitigate integer boundary spurs. The LMX2595 allows users to synchronize the outputs of multiple devices, and also supports applications that require a defined delay between input and output. The frequency ramp generator can synthesize up to two ramps in the automatic ramp generation option or the manual option for maximum flexibility. A fast calibration algorithm allows frequency changes in over 20 µs. The LMX2595 adds support for generating or repeating SYSREFs (JESD204B compliant) and is designed for low noise clock sources in high speed data converters. Fine delay adjustments (9 ps resolution) are provided in this configuration to account for delay differences in board traces. The output drivers in the LMX2595 provide up to 7 dBm output power at a 15-GHz carrier frequency. The device operates from a single 3.3V supply and integrates an LDO, eliminating the need for an onboard low noise LDO.

2. Feature

    1. 10-MHz to 20-GHz output frequency

    2. –110 dBc/Hz phase noise at 100 kHz offset vs. 15GHz carrier

    3. 45-fs rms jitter at 7.5 GHz (100 Hz to 100 MHz)

    4. Programmable output power

    5. PLL key specifications

        – Quality factor: –236 dBc/Hz

        – Normalized 1/f noise: –129 dBc/Hz

        – High phase detector frequency

           – 400-MHz integer mode

           – 300-MHz fractional mode

        – 32-bit fractional-N divider

    6. Remove integer boundary spurs Programmable Input Multiplier

    7. Multiple output phase synchronization equipment

    8. Supports SYSREF at 9 ps resolution Programmable delay

    9. Frequency ramp and chirp generation capability FMCW application

  10. < 20-µs VCO calibration speed

  11. 3.3V single supply operation

3. Application

    1. 5G and mmWave wireless infrastructure

    2. Test and measurement equipment

    3. Radar

    4. Multiple Input Multiple Output

    5. Phased array antennas and beamforming

    6. High-speed data converter clock (supports JESD204B)

4. Pin configuration