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參數(shù)資料
| 型號(hào)： | AD9783-DPG2-EBZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 10/32頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVAL FOR AD9783 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | * |
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AD9780/AD9781/AD9783
Data Sheet
Rev. B | Page 18 of 32
TERMINOLOGY
Linearity Error or Integral Nonlinearity (INL)
Linearity error is defined as the maximum deviation of the
actual analog output from the ideal output, determined by a
straight line drawn from zero scale to full scale.
Differential Nonlinearity (DNL)
DNL is the measure of the variation in analog value, normalized
to full scale, associated with a 1 LSB change in digital input code.
Monotonicity
A DAC is monotonic if the output either increases or remains
constant as the digital input increases.
Offset Error
Offset error is the deviation of the output current from the ideal
of zero. For IOUTA, 0 mA output is expected when the inputs are
all 0s. For IOUTB, 0 mA output is expected when all inputs are
set to 1s.
Gain Error
Gain error is the difference between the actual and ideal output
span. The actual span is determined by the difference between
the output when all inputs are set to 1s and the output when all
inputs are set to 0s.
Output Compliance Range
Output compliance range is the range of allowable voltage at
the output of a current-output DAC. Operation beyond the
maximum compliance limits can cause either output stage
saturation or breakdown, resulting in nonlinear performance.
Temperature Drift
Temperature drift is specified as the maximum change from
the ambient (25°C) value to the value at either TMIN or TMAX.
For offset and gain drift, the drift is reported in ppm of full-
scale range (FSR) per degree Celsius. For reference drift, the
drift is reported in ppm per degree Celsius.
Power Supply Rejection
Power supply rejection is the maximum change in the full-scale
output as the supplies are varied from minimum to maximum
specified voltages.
Settling Time
Settling time is the time required for the output to reach and
remain within a specified error band around its final value,
measured from the start of the output transition.
Spurious-Free Dynamic Range (SFDR)
SFDR is the difference, in decibels, between the peak amplitude
of the output signal and the peak spurious signal between dc
and the frequency equal to half the input data rate.
Total Harmonic Distortion (THD)
THD is the ratio of the rms sum of the first six harmonic com-
ponents to the rms value of the measured fundamental. It is
expressed as a percentage or in decibels.
Signal-to-Noise Ratio (SNR)
SNR is the ratio of the rms value of the measured output signal
to the rms sum of all other spectral components below the Nyquist
frequency, excluding the first six harmonics and dc. The value
for SNR is expressed in decibels.
Adjacent Channel Leakage Ratio (ACLR)
ACLR is the ratio in dBc between the measured power within a
channel relative to its adjacent channel.
Complex Image Rejection
In a traditional two-part upconversion, two images are created
around the second IF frequency. These images usually waste
transmitter power and system bandwidth. By placing the real
part of a second complex modulator in series with the first
complex modulator, either the upper or lower frequency image
near the second IF can be rejected.
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