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peaking and oscillation with AD8351S

Category: Hardware
Product Number: AD8351S

    I used a AD8351S to convert a single ended signal to differential signal for ADC input. 

    My schematic is pasted as below.

    When I change R26 and R27 to 0 or 25 Ohm, the output has a oscillation phenomenon, and the output frequency changed with R26 and R27.  In this case, input is floated.

    When I test the DUT in low temperature to -10℃,  the output seems add some peaking signals.

 

    How CAN I solve these problems?

 Schematic

PCB

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