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AD5321BRT bảng dữ liệu(PDF) 6 Page - Analog Devices

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REV. 0
AD5301/AD5311/AD5321
–6–
TERMINOLOGY
RELATIVE ACCURACY
For the DAC, Relative Accuracy or Integral Nonlinearity (INL)
is a measure of the maximum deviation, in LSBs, from a straight
line passing through the actual endpoints of the DAC transfer
function. Typical INL vs. Code plots can be seen in Figures 2
to 4.
DIFFERENTIAL NONLINEARITY
Differential Nonlinearity (DNL) is the difference between the
measured change and the ideal 1 LSB change between any two
adjacent codes. A specified differential nonlinearity of
±1 LSB
maximum ensures monotonicity. These DACs are guaranteed
monotonic by design over all codes. Typical DNL vs. Code
plots can be seen in Figures 5 to 7.
ZERO CODE ERROR
Zero Code Error is a measure of the output error when zero
code (00H) is loaded to the DAC register. Ideally, the output
should be 0 V. The Zero Code Error of the AD5301/AD5311/
AD5321 is always positive because the output of the DAC can-
not go below 0 V. It is due to a combination of the offset errors
in the DAC and output amplifier. It is expressed in mV, see
Figure 9.
FULL-SCALE ERROR
Full-Scale Error is a measure of the output error when full scale
is loaded to the DAC register. Ideally, the output should be VDD
– 1 LSB. Full-scale error is expressed in percent of FSR (full-
scale range). A plot can be seen in Figure 9.
GAIN ERROR
This is a measure of the span error of the DAC. It is the devia-
tion in slope of the actual DAC transfer characteristic from the
ideal expressed as a percentage of the full-scale range.
ZERO CODE ERROR DRIFT
This is a measure of the change in zero code error with a
change in temperature. It is expressed in
µV/°C.
GAIN ERROR DRIFT
This is a measure of the change in gain error with changes in tem-
perature. It is expressed in (ppm of full-scale range)/
°C.
MAJOR CODE TRANSITION GLITCH ENERGY
Major Code Transition Glitch Energy is the energy of the im-
pulse injected into the analog output when the code in the DAC
register changes state. It is normally specified as the area of the
glitch in nV-secs and is measured when the digital code is
changed by 1 LSB at the major carry transition (011 . . . 11 to
100 . . . 00 or 100 . . . 00 to 011 . . . 11).
DIGITAL FEEDTHROUGH
Digital Feedthrough is a measure of the impulse injected into
the analog output of the DAC from the digital input pins of the
device but is measured when the DAC is not being written to. It
is specified in nV-secs and is measured with a full-scale change
on the digital input pins, i.e., from all 0s to all 1s and vice versa.


Số phần tương tự - AD5321BRT

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Analog Devices
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Mô tả tương tự - AD5321BRT

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