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SNAU210A – March 2017 – Revised March 2020
Copyright © 2017–2020, Texas Instruments Incorporated
LMX2594 EVM Instructions – 15-GHz Wideband Low Noise PLL With
Integrated VCO
User's Guide
SNAU210A – March 2017 – Revised March 2020
LMX2594 EVM Instructions – 15-GHz Wideband Low Noise
PLL With Integrated VCO
This Evaluation Module is for the LMX2594, which is the first PLL with integrated VCO in industry to get
fundamental VCO output up to 15 GHz. The industry leading PLL FOM is –236 dBc/Hz with 1/f of –129
dBc/Hz. This device supports the JESD204B standard (as in the LMX2594 can generate or repeat the
SYSREF signal), and is designed for clock high-speed data converters. The integrated jitter from the EVM
measurements is less than 50 fs at 9-GHz carrier frequency. By providing a SYNC signal, the user can
synchronize the output phase across multiple LMX2594 devices. The LMX2594 can also generate a
frequency ramp as demonstrated in this evaluation module. With an on-board oscillator, the setup process
only requires a 3.3-V power supply and a Reference Pro module (included for SPI Programming
interface). The software is simple with an intuitive and user-friendly GUI.
Figure 1. LMX2594EVM
Contents
1
Evaluation Board Setup
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2
EVM Description
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3
Bringing LMX2594 to a Lock State
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4
Loop Filter Configuration
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5
Key Results to Expect
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