參數(shù)資料
型號(hào)： 5962-8962902LX
廠商： ANALOG DEVICES INC
元件分類： 模擬信號(hào)調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, CDIP24
封裝： CERDIP-24
文件頁(yè)數(shù)： 5/21頁(yè)
文件大?。?/td> 485K
代理商： 5962-8962902LX
AD7569/AD7669
–13–
REV. B
Figure 15. DAC Output Spectrum
HISTOGRAM PLOT
When a sine wave of specified frequency is applied to the VIN in-
put of the AD7569/AD7669 and several thousand samples are
taken, it is possible to plot a histogram showing the frequency of
occurrence of each of the 256 ADC codes. If a particular step is
wider than the ideal 1 LSB width, the code associated with that
step will accumulate more counts than for the code for an ideal
step. Likewise, a step narrower than ideal width will have fewer
counts. Missing codes are easily seen because a missing code
means zero counts for a particular code. The absence of large
spikes in the plot indicates small differential nonlinearity.
Figure 16 shows a histogram plot for the ADC indicating very
small differential nonlinearity and no missing codes for an input
frequency of 204 kHz. For a sine-wave input, a perfect ADC
would produce a cusp probability density function described by
the equation
p(V )
=
1
π( A2 V 2)1/2
where A is the peak amplitude of the sine wave and p(V) the
probability of occurrence at a voltage V.
The histogram plot of Figure 16 corresponds very well with this
cusp shape.
Further typical plots of the performance of the AD7569/AD7669
are shown in the Typical Performance Graphs section of the data
sheet.
Figure 16. ADC Histogram Plot
and harmonic distortion performance. Similarly, for inter-
modulation distortion, an input (either to VIN or DAC code)
consisting of pure sine waves at two frequencies is applied to the
AD7569/AD7669.
Figure 13. ADC FFT Plot
Figure 13 shows a 2048 point FFT plot of the ADC with an in-
put signal of 130 kHz. The SNR is 48.4 dB. It can be seen that
most of the harmonics are buried in the noise floor. It should be
noted that the harmonics are taken into account when calculat-
ing the SNR. The relationship between SNR and resolution (N)
is expressed by the following equation:
SNR = (6.02N + 1.76) dB
This is for an ideal part with no differential or integral linearity
errors. These errors will cause a degradation in SNR. By work-
ing backward from the above equation, it is possible to get a
measure of ADC performance expressed in effective number of
bits (N). This effective number of bits is plotted versus fre-
quency in Figure 14. The effective number of bits typically falls
between 7.7 and 7.8, corresponding to SNR figures of 48.1 dB
and 48.7 dB.
Figure 15 shows a spectrum analyzer plot of the output spec-
trum from the DAC with an ideal sine-wave table loaded to the
data inputs of the DAC. In this case, the SNR is 46 dB.
Figure 14. Effective Number of Bits vs. Frequency
相關(guān)PDF資料
PDF描述
5962-8963401CA QUAD OP-AMP, 2500 uV OFFSET-MAX, 34 MHz BAND WIDTH, CDIP14
5962-8963401CX QUAD OP-AMP, 2500 uV OFFSET-MAX, 34 MHz BAND WIDTH, CDIP14
5962-89635012X OP-AMP, 3000 uV OFFSET-MAX, 10 MHz BAND WIDTH, CQCC20
5962-8963501PX OP-AMP, 3000 uV OFFSET-MAX, 10 MHz BAND WIDTH, CDIP8
5962-8964301XC OP-AMP, 10000 uV OFFSET-MAX, 40 MHz BAND WIDTH, MBCY12
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
5962-8963001EA 制造商:National Semiconductor Corporation 功能描述:Dual Receiver RS-232/RS-422/RS-423 16-Pin CDIP Rail 制造商:National Semiconductor 功能描述:Dual Receiver RS-232/RS-422/RS-423 16-Pin CDIP Rail
5962-8963101PA 制造商:Rochester Electronics LLC 功能描述:- Bulk
5962-8963201PA 制造商:Rochester Electronics LLC 功能描述:SMD HA7-5112 DUAL LOW NOISE OP AMP 8 LD CDIP - Bulk
5962-89635012A 制造商:Intersil Corporation 功能描述:OP AMP SGL GP 15V 20CLCC - Rail/Tube
5962-8963501PA 制造商:Intersil Corporation 功能描述:SMD VERSIO HA7-5101/883 NOT DUAL MARKED - Rail/Tube
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*