參數(shù)資料
型號(hào): AD7893AR10REEL
英文描述: Ultralow Power Single/Dual Comparator; Package: PDIP; No of Pins: 8; Temperature Range: 0°C to +70°C
中文描述: 轉(zhuǎn)換器IC
文件頁(yè)數(shù): 19/20頁(yè)
文件大?。?/td> 191K
代理商: AD7893AR10REEL
REV. B
AD7890
–19–
INPUT FREQUENCY
kHz
0
E
12.0
11.5
11.0
10.5
10.0
20
40
Figure 21. Effective Number of Bits vs. Frequency
Effective Number of Bits
The formula for Signal to (Noise + Distortion) Ratio (See Ter-
minology section) is related to the resolution or number of bits
in the converter. Rewriting the formula, below, gives a measure
of performance expressed in effective number of bits (N):
N = (SNR —
1.76)/6.02
where
SNR
is Signal to (Noise + Distortion) Ratio
The effective number of bits for a device can be calculated
from its measured Signal to (Noise + Distortion) Ratio. Fig-
ure 21 shows a typical plot of effective number of bits versus
frequency for the AD7890-2 from dc to 40 kHz. The sampling
frequency is 102.4 kHz. The plot shows that the AD7890 con-
verts an input sine wave of 40 kHz to an effective numbers of
bits of 11 which equates to a Signal to (Noise + Distortion)
level of 68 dB.
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AD7893AR-2REEL 制造商:Analog Devices 功能描述:ADC Single SAR 117ksps 12-bit Serial 8-Pin SOIC N T/R 制造商:Analog Devices 功能描述:ADC SGL SAR 117KSPS 12-BIT SERL 8SOIC N - Tape and Reel
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