Hi Nagar,
Please check SAP Note 401646.
DataSource 0FI_AR_4 uses a time stamp delta mechanism. At the end of the note you can find some information on the "safety time interval" (in days). Default is 1 day which I consider as the minimum.
According to me the solution should be found in "minute based extraction".
Please refer to SAP Note 991429 and the attached Word document in SAP Note 1330016.
Best regards,
Sander