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參數(shù)資料
| 型號(hào)： | AD5764BSU |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | DAC |
| 英文描述： | Complete, Quad, 16-Bit, High Accuracy, Serial Input, Bipolar Voltage Output DAC |
| 中文描述： | SERIAL INPUT LOADING, 8 us SETTLING TIME, 16-BIT DAC, PQFP32 |
| 封裝： | MO-026-ABA, TQFP-32 |
| 文件頁數(shù)： | 13/27頁 |
| 文件大?。?/td> | 251K |
| 代理商： | AD5764BSU |
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Preliminary Technical Data
AD5764
TERMINOLOGY
Rev. PrC 21-Oct-04| Page 13 of 28
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 endpoints of the DAC transfer
function. A typical INL vs. code plot can be seen in Figure .
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. This DAC is guaranteed
monotonic by design. A typical DNL vs. code plot can be seen
in Figure .
Monotonicity
A DAC is monotonic, if the output either increases or remains
constant for increasing digital input code. The AD5764 is
monotonic over its full operating temperature range
Bipolar Zero Error
Bipolar zero error is the deviation of the analog output from the
ideal half-scale output of 0 V when the DAC register is loaded
with 0x8000 (Straight Binary coding) or 0x0000
(2sComplement coding)
Full-Scale Error
Full-scale error is a measure of the output error when full-scale
code (FFFF Hex) is loaded to the DAC register. Ideally the
output should be programmed full scale value – 1 LSB. Full-
scale error is expressed in percent of full-scale range. A plot of
full-scale error vs. temperature can be seen in Figure .
Negative Full-Scale Error / Zero Scale Error
Negative full-scale error is the error in the DAC output voltage
when 0x0000 (Straight Binary coding) or 0x8000
(2sComplement coding) is loaded to the DAC register. Ideally
the output voltage should be programmed negative full scale
value – 1 LSB.
Output Voltage Settling Time
Output voltage settling time is the amount od time it takes for
the output to settle to a specified level for a full-scale input
change.
Slew Rate
The slew rate of a device is a limatation in the rate of change of
the output voltage. The output slewing speed of a voltage-
output D/A converter is usually limited by the slew rate of the
amplifierused at its output. Slew rate is measured from 10% to
90% of the output signal and is given in Vμs.
Gain Error
This is a measure of the span error of the DAC. It is the
deviation in slope of the DAC transfer characteristic from ideal
expressed as a percent of the full-scale range.
Total Unadjusted Error
Total Unadjusted Error (TUE) is a measure of the output error
taking all the various errors into account. A typical TUE vs.
code plot can be seen in Figure .
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
temperature. It is expressed in (ppm of full-scale range)/°C.
Digital-to-Analog Glitch Impulse
Digital-to-analog glitch impulse is the impulse injected into the
analog output when the input 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 input code is changed by
1 LSB at the major carry transition (7FFF Hex to 8000 Hex). See
Figure .
Digital Feedthrough
Digital feedthrough is a measure of the impulse injected into
the analog output of the DAC from the digital inputs of the
DAC but is measured when the DAC output is not updated. It is
specified in nV secs and measured with a full-scale code change
on the data bus, i.e., from all 0s to all 1s and vice versa.
Power Supply Sensitivity
Power supply sensitivity indicates how the output of the DAC is
affected by changes in the power supply voltage.
DC Crosstalk
This is the dc change in the output level of one DAC in response
to a change in the output of another DAC. It is measured with a
full-scale output change on one DAC while monitoring another
DAC. It is expressed in μV.
DAC-to-DAC Crosstalk
This is the glitch impulse transferred to the output of one DAC
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| AD5764CSU | Complete, Quad, 16-Bit, High Accuracy, Serial Input, Bipolar Voltage Output DAC |
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