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AD7770 Maximum input range and AFE circuit query

Category: Hardware
Product Number: AD7770
Hello Team,
 
We are using AD7770 IC for AC voltage measurement purpose. 

Input signal range is for Variant 1 is 110V AC and variant 2 is 0-4V AC (With changes of resistor network).

Refer attached capture. There two queries.
Query 1 :
110V or 0-4 V AC Voltage is enter in ADC AD7770 pin via these resistor network. We did not use any Analog front end circuit like OP-AMP etc. So, is it ok?
Query 2 : 
Based on below input is true differential or PSEUDO differential? And based on this input type what is maximum input voltage range of ADC AIN+ and AIN- pin?
 
Please check this and provide your valuable feedback.