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

Question

Based on the current documentation, I changed the jumper connection as instructed. 
 Since I only have a 12V/24W wall wart available at the moment, I connected it to P15. 
 However, I encountered an issue where selecting "On-Board amplifier" in ACE and outputting a waveform did not affect the output voltage, even though I connected the power supply. 
 Upon reviewing the schematic, I noticed that the VIN of P15 on the board is only connected to the VIN of "POWER". 
 I am not sure if my understanding is correct. 
 Vpp originally increased from 400mV to 1.3V (presumably due to the effect of the amplifier on the board), 
 but I don't understand why it still stays at 1.3V even after connecting the power supply.Thank you.

JMMina · Accepted Answer

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)

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