2-106 Revision 4 Resolution ADC resolution is the number of bits used to represent an analog input signal. To more accu" />
鍙冩暩(sh霉)璩囨枡
鍨嬭櫉(h脿o)锛� U1AFS600-FG256
寤犲晢锛� Microsemi SoC
鏂囦欢闋�(y猫)鏁�(sh霉)锛� 27/334闋�(y猫)
鏂囦欢澶�?銆�?/td> 0K
鎻忚堪锛� IC FPGA FUSION SIL SCULP 256FBGA
妯�(bi膩o)婧�(zh菙n)鍖呰锛� 90
绯诲垪锛� Fusion®
RAM 浣嶇附瑷�(j矛)锛� 36864
杓稿叆/杓稿嚭鏁�(sh霉)锛� 114
闁€鏁�(sh霉)锛� 250000
闆绘簮闆诲锛� 1.425 V ~ 1.575 V
瀹夎椤炲瀷锛� 琛ㄩ潰璨艰
宸ヤ綔婧害锛� 0°C ~ 85°C
灏佽/澶栨锛� 256-LBGA
渚涙噳(y墨ng)鍟嗚ō(sh猫)鍌欏皝瑁濓細 256-FPBGA锛�17x17锛�
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Device Architecture
2-106
Revision 4
Resolution
ADC resolution is the number of bits used to represent an analog input signal. To more accurately
replicate the analog signal, resolution needs to be increased.
Sampling Rate
Sampling rate or sample frequency, specified in samples per second (sps), is the rate at which an ADC
acquires (samples) the analog input.
SNR 鈥� Signal-to-Noise Ratio
SNR is the ratio of the amplitude of the desired signal to the amplitude of the noise signals at a given
point in time. For a waveform perfectly reconstructed from digital samples, the theoretical maximum SNR
(EQ 14) is the ratio of the full-scale analog input (RMS value) to the RMS quantization error (residual
error). The ideal, theoretical minimum ADC noise is caused by quantization error only and results directly
from the ADC鈥檚 resolution (N bits):
EQ 14
SINAD 鈥� Signal-to-Noise and Distortion
SINAD is the ratio of the rms amplitude to the mean value of the root-sum-square of the all other spectral
components, including harmonics, but excluding DC. SINAD is a good indication of the overall dynamic
performance of an ADC because it includes all components which make up noise and distortion.
Total Harmonic Distortion
THD measures the distortion content of a signal, and is specified in decibels relative to the carrier (dBc).
THD is the ratio of the RMS sum of the selected harmonics of the input signal to the fundamental itself.
Only harmonics within the Nyquist limit are included in the measurement.
Figure 2-86 Offset Error
ADC
Output
Code
Input Voltage to Prescaler
Ideal Output
Offset Error = 1.5 LSB
Actual Output
0...00
0...01
SNRdB[MAX]
6.02dB N 1.76dB
+
=
鐩搁棞(gu膩n)PDF璩囨枡
PDF鎻忚堪
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鐩搁棞(gu膩n)浠g悊鍟�/鎶€琛�(sh霉)鍙冩暩(sh霉)
鍙冩暩(sh霉)鎻忚堪
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