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ADRF6516 Evaluation

This evaluation explores the powering and programming requirements of the ADRF6516 board, including the hierarchy, gain select options, and testing results. It also discusses saturation and error sources, and suggests possible next steps for further testing.

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ADRF6516 Evaluation

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  1. ADRF6516 Evaluation David Hann

  2. Powering the Board • VPOS = 3.3 V PS • COM -> Com PS • VPOSD/COMD - device’s power

  3. ADRF Software • Board Must Be Powered • Board Must Be Programmed Each Start Up • Board Does Not Require a Computer After Programming • Hierarchy: Filter, Pre-Amp, Post-Amp, VGA Max • Gain Select Options are each a Binary Choice Testing: • Low Settings: 3+6+22 = 31 dB, 31 MHz • High Settings: 6+12+28 = 46 dB, 31 MHz • Plots are at High Settings unless otherwise noted

  4. Evaluation Software

  5. Saturation at 20 MHz Vin = 20 mV pk-pk, 20 MHz VGAIN = 980 mV ADRF = High Settings

  6. Typical Saturation Vin = 20 mV pk-pk, 5 MHz VGAIN = 990 mV ADRF = High Settings

  7. 3.7 dB Error Source • Fairly Consistent (σ=.44) • 200 mV error in VGAIN to replicate • Not From Internal Inductance

  8. Shelf Gain (dB) • 5 MHz: 43.9 dB • 10 MHz: 43.5 dB • 15 MHz: 43.6 dB • 20 MHz: 43.9 dB • Data Sheet: 46 dB

  9. Possible Next Steps • DC Decoupling Testing • Corner Frequency Testing

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