The ADA4937-2 datasheet states that the ground and power planes should be cleared near the summing nodes and gives an example for the ADA4938-1:
This is a bit confusing to me because it only looks like the polygon pour on the top layer is removed…
How to drive AD9637 use 3 pcs ADA4937-2? What's the connnection about the 6 Vocm pins of 3 pcs ADA4937-2 to the Vcm pin of AD9637? Thanks!
ADA4937-2 comes with a package option of CP-24-10 which is compliant to JEDEC Standars MO-220-WGGD-8. We apologize that there is no bxl file available in the product page. We will have it updated.
I'm simulating the ADA4937 Differential Ampliifier that I will use as ADC driver for the AD9255, with and without output filter.
It seems that adding the output filter at tha ADA4937 leads to a huge distortion of the output signal.
Thank you for using the ADA4937 and AD9253.
I believe that the output common mode range of the ADA4937 is not quite matched to the AD9253. As you have stated, the VCM output of the AD9253 is at 0.9V. This is outside the range of the ADA4937…
I'm planning to use the AD9255 single 14 bit ADC with DC coupled input signals in the dc - 20 MHz range.
Because of the DC coupled requirement I am looking at ADC driver amplifiers instead of a transformer.
The AD9255 web page recommends the ADA4937…
Based on the datasheet of ADA4937 page 5, the maximum output Voltage is 2.5V with Vocm referenced at 1.65V (+Vs/2). This 2.5 V is within the input requirement of ADS42LB49 which is -0.3 to 3 V so you may not need a protection diode. Just be…
Apologies for late response.
#1 & #2. Input Common Mode Voltage Range of ADA4937 is specified at Min = 0.3 V to Max= 3.0 V. Within these specified values the part is expected to have an optimum operation. You go beyond this limits, the outputs…