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| resources:eval:user-guides:dac:eval-ad3542r [18 Mar 2022 18:00] – [Evaluation Board Photograph] Antonio Jimenez de Parga | resources:eval:user-guides:dac:eval-ad3542r [19 Apr 2022 19:19] (current) – [Vector Generator View] Antonio Jimenez de Parga | ||
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| * On-board or external power supply | * On-board or external power supply | ||
| * On-board or external voltage reference | * On-board or external voltage reference | ||
| + | * Several impedance matching options | ||
| * Clock and trigger inputs for external synchronization | * Clock and trigger inputs for external synchronization | ||
| * Mates with controller board [[adi> | * Mates with controller board [[adi> | ||
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| This user guide covers the details of the configuration and operation of the EVAL-AD3542RFMCZ board and the associated ACE plug-in. For additional information on the DAC operation refer to the [[adi> | This user guide covers the details of the configuration and operation of the EVAL-AD3542RFMCZ board and the associated ACE plug-in. For additional information on the DAC operation refer to the [[adi> | ||
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| ===== Evaluation Board Photograph ===== | ===== Evaluation Board Photograph ===== | ||
| - | < | + | < |
| + | <WRAP half column> | ||
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| - | </ | + | </ |
| + | < | ||
| {{: | {{: | ||
| </ | </ | ||
| + | </ | ||
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| ===== Evaluation Board Quick Start Procedure ===== | ===== Evaluation Board Quick Start Procedure ===== | ||
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| * Using a coaxial cable with the oscilloscope in 50Ω impedance. A matching pad must be used so that the impedance seen at the coaxial connector is 50Ω. For example, 976Ω for R4 or R5, 52.3Ω for R28 or R29 and 0Ω for C15 or C16. This solution provides perfect impedance matching on both sides of the coaxial cable while the DAC sees 1kΩ load. The signal is attenuated by a factor 19.55 (25.8 dB). This configuration can be used to measure settling time very accurately. It is not suitable for noise measurements because the attenuation of the matching pad sets the noise below the sensitivity of the spectrum analyzer. | * Using a coaxial cable with the oscilloscope in 50Ω impedance. A matching pad must be used so that the impedance seen at the coaxial connector is 50Ω. For example, 976Ω for R4 or R5, 52.3Ω for R28 or R29 and 0Ω for C15 or C16. This solution provides perfect impedance matching on both sides of the coaxial cable while the DAC sees 1kΩ load. The signal is attenuated by a factor 19.55 (25.8 dB). This configuration can be used to measure settling time very accurately. It is not suitable for noise measurements because the attenuation of the matching pad sets the noise below the sensitivity of the spectrum analyzer. | ||
| * Using a coaxial cable to drive a medium-impedance load, for example 500Ω. This configuration is half-way between perfect impedance matching and high-impedance termination. It provides better matching in high speed, lower noise susceptibility and lower power dissipation with DC voltage. The driver is series-terminated to 47Ω (R4 or R5) to match the nominal impedance of the cable while the receiver is terminated to 500Ω (for example, an oscilloscope in 1MΩ impedance with 500Ω on a Tee connector). To minimize DC loss, 1μH inductors are used at L5 and L6. A snubber network can be added on R28, R29, C15 and C16 to reduce the overshoot caused by these inductors. | * Using a coaxial cable to drive a medium-impedance load, for example 500Ω. This configuration is half-way between perfect impedance matching and high-impedance termination. It provides better matching in high speed, lower noise susceptibility and lower power dissipation with DC voltage. The driver is series-terminated to 47Ω (R4 or R5) to match the nominal impedance of the cable while the receiver is terminated to 500Ω (for example, an oscilloscope in 1MΩ impedance with 500Ω on a Tee connector). To minimize DC loss, 1μH inductors are used at L5 and L6. A snubber network can be added on R28, R29, C15 and C16 to reduce the overshoot caused by these inductors. | ||
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| + | <WRAP center round info 60%> | ||
| + | Square waves may not look perfectly square on many oscilloscopes. This is due to the large variation in DC levels affecting the oscilloscope front end or ADC. This results in the flat top and bottom of the waveform showing a slow drift. The effect increases when zooming in the signal due to overdrive recovery in the oscilloscope front end. It is recommended to use the 50Ω matching pad to reduce the span of the signal. | ||
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| ===== ACE Plug-In Description And Features ===== | ===== ACE Plug-In Description And Features ===== | ||
| ==== ACE Plug-In Hierarchy ==== | ==== ACE Plug-In Hierarchy ==== | ||
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| * **Vector Name:** specify a name in this field to identify the waveforms in the Waveform Generator view. | * **Vector Name:** specify a name in this field to identify the waveforms in the Waveform Generator view. | ||
| * **Desired Frequency: | * **Desired Frequency: | ||
| - | * **Attenuation: | + | * **Attenuation: |
| * **Relative Phase:** specify the phase offset relative to the start of the waveform record. | * **Relative Phase:** specify the phase offset relative to the start of the waveform record. | ||
| * **Preview button:** pressing this button displays the waveform in the time-domain and its FFT in the frequency-domain window, if present. | * **Preview button:** pressing this button displays the waveform in the time-domain and its FFT in the frequency-domain window, if present. | ||
resources/eval/user-guides/dac/eval-ad3542r.1647622841.txt.gz · Last modified: 18 Mar 2022 18:00 by Antonio Jimenez de Parga