For DAC, supply voltage is 5v.
Reference voltage to DAC is set to -5v.
For OPA548, supply voltage is 15v.
OPA548 gain is set to 3.42.

*Buffer output and Analog output taken without connecting to the load
*Measured the values in multimeter.s
*Readings taken when current digital value is set to zero and varying the voltage digital value.

S.NO   Digital	Buffer output  	Analog  	
			
1.     4096       4.09/2.92		13.40
2.	 2048	      2.4			 8.35
3.	 1024	      1.2			 4.17
4.	  512	      0.6			 2.08
5.	  256		0.3			 1.03
6.	  128       0.15			 0.58
7.	   64		0.075			 0.53
8.       32       0.037			 0.51
9. 	   16		0.016			 0.50
10.       8		0.011			 0.50
11.       4		0.011			 0.50
12.       2		0.011			 0.50
13.       1		0.011			 0.50
14.       0		0.011			 0.50


*Readings taken when current digital value is set to max and varying the voltage digital value.


S.NO   Digital	Buffer output  	Analog  	
			
1.     4096       4.09/3.6		13.16
2.	 2048	      2.4			 8.35
3.	 1024	      1.2			 4.17
4.	  512	      0.6			 2.08
5.	  256		0.3			 1.03
6.	  128       0.15			 0.62			 
7.	   64		0.075			 0.56
8.       32       0.037			 0.54
9. 	   16		0.016			 0.54
10.       8		0.011			 0.54
11.       4		0.011			 0.54
12.       2		0.011			 0.54
13.       1		0.011			 0.54
14.       0		0.004			 0.54

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For 12v ,digital value is 2950
For 11.87v ,digital value is 2900