To use the amplifier on the AD9106-ARDZ-EBZ board

Hi kysih ,

Can you provide screen captures of your output waveform when you select the "On-board amplifier" in ACE? When outputting a waveform thru the On-board Op-amp, please make sure that the the USB connection and the supply to P15 are both connected to the Evaluation Board before configuring in ACE, as indicated in this link: Quick Start Guide for AD9106/AD9102 using ACE.  

After clicking Apply in the Configuration Wizard, the initial output voltage that you measured at 400mV should return to 0V. 

Regards,

Marco

Hi kysih ,

Can you provide screen captures of your output waveform when you select the "On-board amplifier" in ACE? When outputting a waveform thru the On-board Op-amp, please make sure that the the USB connection and the supply to P15 are both connected to the Evaluation Board before configuring in ACE, as indicated in this link: Quick Start Guide for AD9106/AD9102 using ACE.  

After clicking Apply in the Configuration Wizard, the initial output voltage that you measured at 400mV should return to 0V. 

Regards,

Marco

Hi JMMina ,

Thank you for responding to my question so quickly. I have followed the steps in this link: Evaluating the AD9106/AD9102 Waveform Generator Digital-to-Analog Converter using ACE [Analog Devices Wiki]. My question is, after connecting the power supply to P15, is the maximum output Vpp about 1.3V?

Hi kysih ,

The maximum output Vpp should be +1.0V, as indicated in Table 1 and 2 of the datasheet. 

Can you confirm if you've set the termination to 50Ω for channel 1 in your oscilloscope capture? 

Regards,

Marco

Hi JMMina 

Can you confirm if you've set the termination to 50Ω for channel 1 in your oscilloscope capture? 

A:Yes, I have confirmed that the termination for channel 1 in my oscilloscope capture is set to 50Ω.

But now I'm using the amplifier (ada4817) on the board, and even after amplification, the highest output is only 1V?

Hi kysih ,

Let me correct my previous statement. The maximum output Vpp of +1.0V is only on the output stage of the AD9106 DAC. The maximum peak-to-peak voltage will increase in the output of the amplifier. The amplifier stage of AD9106 is shown below. This is based on the latest version of AD9106-ARDZ-EBZ Schematic

You are correct: the maximum output Vpp should be around 1.3V. This is assuming the default on-board resistors are used and a typical full-scale current (IOUTFS) of 4mA. The resistances on the amplifier stage can to be changed if a different Vpp is desired, however the resulting output at the AD9106 DAC (IOUTP and IOUTN) should still be within compliance to ensure the performance of the device. 

Regards,

Marco

Hi JMMina 

Thank you very much for your answer!! Now I understand.