Part Number: ADS7852 Hi, I am interfacing ADC ADS7852YB/250 with FPGA. I am facing some problems using this part number ADS7852 . Device Marking of this part is A52Y-OCC-SERI. I am facing following problems using this ADC. 1. Internal Reference of this IC drops for different inputs. For example when I was converting Channel 0 (Address 000) then reference output was 2.5v, but when I was converting Channel 2 (Address 010) then reference drops to 1.7v. 2. When I was converting Channel 0 (Address 000) then results were correct for input range of (3.7v to 5v) and (0v to 1.2v). and results were incorrect for an input range of (1.2v to 3.7v). For example when input was 3,7v then output was 4.89v. 3. When I selected Channel 2 (Address 010) then I didn't received the correct output of ADC for that range (3.7v to 5v) and (0v to 1.2v). for example when input was 4.5v then output of ADC was 4.13v. And for range of (3.7v to 5v) the result were same as for channel 0. Please tell me why I am having these types of problems. Also tell me why that marking ID against this part number is correct or not and this is not a Replicate or Chinese part. I have attached my design in attachments. One more thing I used external reference of 2.5v when I was not getting correct internal reference. Looking forward to your response. Thanks.(Please visit the site to view this file)
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