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Original question:

LMX2594: PWR output configuration and value

LMX2594: Output power from 10 MHz up to 1GHz.

Juan Camilo Peña Arias
Prodigy 10 points
Part Number: LMX2594


Hello there,

I'am working with this synth and i want to know how is approximately the output power in this range of frequency because the datasheet (Figure 18) provide since 3 GHz to 15 GHz.  OUTx_PWR=50.

Regards,

Juan Camilo Peña A.

  • +1
    TI__Guru** 111070 points

    Hi Juan,

    Between 10 MHz and 1 GHz, with OUTx_PWR = 50, the output power is approx. 8 dBm.

  • +1
    TI__Mastermind 34000 points

    Hi Juan,

    I set up a script to evaluate the power from 10MHz to 1000MHz, and confirmed Noel's assertion that the output power is approximately 8 dBm at all stated frequencies with 50Ω pull-up. This measurement was taken on the EVM, so there may be some board losses that are not de-embedded from this measurement, but at lower frequencies these are negligible. Each measurement is the average of five measurements; I would only trust the precision to the nearest thousandth (±0.001). All data taken from a single-ended output, both legs of the differential pair terminated to 50Ω, at room temperature (~25°C) and nominal voltage (3.3V). Approximately 0.15dB variation across frequency is observed.

    https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/48/LMX2594_5F00_output_5F00_power_5F00_50.tsv

    Regards,

    Derek Payne