Requirement High Speed DAC

Question

Hi Team, 
 Im new to the design of ADC for 4-20mA analog Input and industrial applications. I have attached the complete design requirement. Could you please have a look on my attached requirement sheet and share the below Inputs. 
 1) Suggest ADC part number for below spec? 
 Number of channels:1 channel (1 channel or 4 channel in a single chip) Resolution: 16 bit/14bit Sample rate : 125Msps Digital Input interface: SPI Analog Output specification: 4-20mA galvanically isolated output 
 2)If galvanic isolated DAC is not available, what the galvanic isolated front end circuit can be used? Is there any galvanic isolated amplifier?

JMMina · Accepted Answer

Hi Chitharanjan_M , 
 This link (Standard High Speed D/A Converters) gives a list of High-speed DACs that ADI has. You can filter the list based on your requirements. You could use AD9117 which is a 14-bit DAC with a maximum sampling rate of 125Msps with SPI interface. Its full-scale current output is 2-20mA. There is also the AD9775 (14-bit) and the AD9777 (16-bit). However, I would recommend you use AD9117 for your design. 
 Regards, Marco)

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Requirement High Speed DAC