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參數(shù)資料
| 型號： | AD7865 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Simultaneous Sampling, Fast, 14-Bit ADC(四通道,同時采樣,高速,14位A/D轉(zhuǎn)換器) |
| 中文描述： | 同步采樣，快速，14位ADC（四通道，同時采樣，高速，14位的A / D轉(zhuǎn)換器） |
| 文件頁數(shù)： | 17/21頁 |
| 文件大小： | 375K |
| 代理商： | AD7865 |
AD7865
Rev. PrC
–17–
Preliminary Technical Data
PRELMNARY
significance. The second order terms are usually distanced
in frequency from the original sine waves while the third
order terms are usually at a frequency close to the input
frequencies. As a result, the second and third order terms
are specified separately. The calculation of the intermodu-
lation distortion is as per the THD specification where it
is the ratio of the rms sum of the individual distortion
products to the rms amplitude of the fundamental expressed
in dBs. In this case, the input consists of two, equal
amplitude, low distortion sine waves. Figure 17 shows a
typical IMD plot for the AD7865.
TECHNCAL
The effective number of bits for a device can be calculated
directly from its measured SNR. Figure 16 shows a
typical plot of effective number of bits versus frequency for
an AD7864-2.
T.B.D.
Figure 16. Effective Numbers of Bits vs. Frequency
Intermodulation Distortion
With inputs consisting of sine waves at two frequencies, fa
and fb, any active device with nonlinearities will create
distortion products at sum and difference frequencies of
mfa ± nfb where m, n = 0, 1, 2, 3 . . ., etc.
Intermodulation terms are those for which neither m or n
are equal to zero. For example, the second order terms
include (fa + fb) and (fa – fb) while the third order terms
include (2fa + fb), (2fa – fb), (fa + 2fb) and (fa – 2fb).
The AD7865 is tested using two input frequencies. In this
case the second and third order terms are of different
T.B.D.
Figure 17. AD7865 IMD Plot
AC Linearity Plots
The plots shown in Figure 18 below show typical DNL
and INL for the AD7865.
Figure 18. AD7865 Typical DNL and INL Plots
T.B.D.
Figure 19 - ENOB's of the AD7865 at 1MHz
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| AD7869 | Complete 14-bit I/O System Containing a DAC and a ADC(完備的14位I/O系統(tǒng)（包含一個A/D轉(zhuǎn)換器和一個D/A轉(zhuǎn)換器）) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD7865AS-1 | 制造商:Rochester Electronics LLC 功能描述:4 CH. SIMULTANEOUS BIPOLAR,14-B ADC I.C. - Bulk 制造商:Analog Devices 功能描述:Analog-Digital Converter IC Number of Bi |
| AD7865AS-1REEL | 制造商:Analog Devices 功能描述:ADC Single SAR 350ksps 14-bit Parallel 44-Pin MQFP T/R 制造商:Rochester Electronics LLC 功能描述:4 CH. SIMULTANEOUS BIPOLAR,14-B ADC I.C. - Tape and Reel |
| AD7865AS2 | 制造商:AD 功能描述:* |
| AD7865AS-2 | 制造商:Analog Devices 功能描述:ADC Single SAR 350ksps 14-bit Parallel 44-Pin MQFP 制造商:Analog Devices 功能描述:IC 14-BIT ADC |
| AD7865AS-2REEL | 制造商:Analog Devices 功能描述:ADC Single SAR 350ksps 14-bit Parallel 44-Pin MQFP T/R 制造商:Analog Devices 功能描述:ADC SGL SAR 350KSPS 14BIT PARALLEL 44MQFP - Tape and Reel |
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