How to DC-couple LTC6403-1 and AD9253

Question

Hi, 
 I want to use LTC6403-1. I have a question about the connection with the ADC (AD9253) , so please let me know. 
 I think the LTC6403-1 is compatible with Zero-I / F. I would like to connect to the AD9253 with a DC connection. Are there any specific methods or precautions? 
 ・ LTC6403 VOCM = 1.5V ・ AD9253 VIN is rated at 2.0V MAX &rArr; For example, is there a way to convert AD9253 input VCM = 0.9V? 
 
 Best Regards, 
 Naohisa

Hooman · Accepted Answer

Hi naohisa, 
 If I understand your question correctly, you'd like to find a way to use the LTC6403-1 to drive the analog input of AD9253 ADC. You're looking at the AD9253 input CM voltage of 0.9V and asking whether LTC6403-1 can support that? 
 LTC6403-1 Vocm is from 1.1V to 2V (Vs = 3V), shown as VOUTCMR. However, AD9253 input CM can be set to 1.1V with reasonable performance as shown in AD9253 Figure 56: 
 
 So, I'd recommend you use 1.1V for AD9253 CM and set LTC6403-1 to 1.1V as well. 
 If I misunderstood your question, please let me know. 
 Regards, 
 Hooman)

Electronic Design Services - PartnerZone

Products Mentioned

How to DC-couple LTC6403-1 and AD9253