Rainbow Electronics MAX1207 - Manual (Page 25)

MAX1207
65Msps, 12-Bit ADC
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Parameter Definitions
Integral Nonlinearity (INL)
Integral nonlinearity is the deviation of the values on an
actual transfer function from a straight line. This straight
line is either a best-straight-line fit or a line drawn
between the end points of the transfer function, once
offset and gain errors have been nullified. The static lin-
earity parameters for the MAX1207 are guaranteed by
design using the best-straight-line fit method.
Differential Nonlinearity (DNL)
Differential nonlinearity is the difference between an
actual step width and the ideal value of 1 LSB. A DNL
error specification of less than 1 LSB guarantees no
missing codes and a monotonic transfer function.
Offset Error
Ideally, the midscale MAX1207 transition occurs at 0.5
LSB above midscale. The offset error is the amount of
deviation between the measured transition point and
the ideal transition point.
16.2kΩ
47Ω
+3.3V
2
2.048V
REFIN REFP
REFN
COM REFOUT
GND
4
2 3 5
1
1 39
38
39
38
2
3
1
2
3
1
1µF
0.1µF
V DD
NOTE: ONE FRONT-END REFERENCE CIRCUIT PROVIDES ±15mA OF OUTPUT DRIVE.
* PLACE AS CLOSE TO THE DEVICE AS POSSIBLE.
3
0.1µF
+3.3V
0.1µF 2.2µF
0.1µF
0.1µF
0.1µF
0.1µF
0.1µF
10µF
2.2µF
MAX6062
MAX1207
REFIN REFP
REFN
COM REFOUT
GND
V DD
0.1µF 2.2µF
0.1µF
0.1µF
*1µF
0.1µF
0.1µF
0.1µF
10µF
2.2µF
MAX1207
10µF
6V 47µF
6V
1.47k Ω
MAX4250
*1µF
Figure 12. External Buffered (MAX4250) Reference Drive Using a MAX6062 Bandgap Reference