Measure milli volt with ADuC706x

Hi i want to use ADuC7060 to measure voltage in range of mv.

I get to know from data sheet and browsing ENGINEERZONE that i need to provide minimum 0.1v (as bias) to ADC5 in single ended mode or there should be greater than 0.1v (as common mode voltage)for differential mode.   

How can i apply 0.1V bias and measure the input if my input is in milli volts?

Please help me with the better interface to ADC to measure voltage.

Thanks in advance.