參數(shù)資料
型號(hào): MAX5121AEEE
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: DAC
英文描述: +3V/+5V, 12-Bit, Serial Voltage-Output DACs with Internal Reference
中文描述: SERIAL INPUT LOADING, 20 us SETTLING TIME, 12-BIT DAC, PDSO16
封裝: 0.150 INCH, 0.025 INCH PITCH, QSOP-16
文件頁數(shù): 14/20頁
文件大?。?/td> 288K
代理商: MAX5121AEEE
M
__________Applic ations Information
Definitions
Integral Nonlinearity (INL)
Integral nonlinearity (Figure 8a) is the deviation of the
values on an actual transfer function from a straight
line. This straight line can be either a best-straight-line
fit (closest approximation to the actual transfer curve)
or a line drawn between the endpoints of the transfer
function, once offset and gain errors have been nulli-
fied. For a DAC, the deviations are measured at every
single step.
Differential Nonlinearity (DNL)
Differential nonlinearity (Figure 8b) is the difference
between an actual step height and the ideal value of
1LSB. If the magnitude of the DNL is less than 1LSB, the
DAC guarantees no missing codes and is monotonic.
Offset Error
The offset error (Figure 8c) is the difference between
the ideal and the actual offset point. For a DAC, the off-
set point is the step value when the digital input is zero.
This error affects all codes by the same amount and
can usually be compensated for by trimming.
Gain Error
Gain error (Figure 8d) is the difference between the
ideal and the actual full-scale output voltage on the
transfer curve, after nullifying the offset error. This error
alters the slope of the transfer function and corre-
sponds to the same percentage error in each step.
+3V /+5V, 12-Bit, S erial Voltage-Output DACs
with Internal Referenc e
14
______________________________________________________________________________________
0
2
1
4
3
7
6
5
000
010
DIGITAL INPUT CODE
001
011
100
101
110
AT STEP
011 (1/2 LSB )
AT STEP
001 (1/4 LSB )
111
A
Figure 8a. Integral Nonlinearity
Figure 8b. Differential Nonlinearity
0
2
1
4
3
6
5
000
010
DIGITAL INPUT CODE
001
011
100
101
DIFFERENTIAL LINEARITY
ERROR (-1/4 LSB)
DIFFERENTIAL
LINEARITY ERROR (+1/4 LSB)
1 LSB
1 LSB
A
0
2
1
3
000
010
001
DIGITAL INPUT CODE
011
ACTUAL
DIAGRAM
IDEAL DIAGRAM
ACTUAL
OFFSET
POINT
OFFSET ERROR
(+1 1/4 LSB)
IDEAL OFFSET
POINT
A
Figure 8c. Offset Error
Figure 8d. Gain Error
0
5
4
6
7
000
101
100
110
111
IDEAL DIAGRAM
GAIN ERROR
(-1 1/4 LSB)
IDEAL FULL-SCALE OUTPUT
ACTUAL
FULL-SCALE
OUTPUT
DIGITAL INPUT CODE
A
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