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ADuC7020BCPZ62I-RL 参数 Datasheet PDF下载

ADuC7020BCPZ62I-RL图片预览
型号: ADuC7020BCPZ62I-RL
PDF下载: 下载PDF文件 查看货源
内容描述: 精密模拟微控制器, 12位模拟I / O , ARM7TDMI MCU [Precision Analog Microcontroller, 12-Bit Analog I/O, ARM7TDMI MCU]
分类和应用: 微控制器和处理器外围集成电路时钟
文件页数/大小: 104 页 / 1747 K
品牌: ADI [ ADI ]
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ADuC7019/20/21/22/24/25/26/27/28/29  
Data Sheet  
TERMINOLOGY  
The ratio is dependent upon the number of quantization levels  
in the digitization process; the more levels, the smaller the  
quantization noise.  
ADC SPECIFICATIONS  
Integral Nonlinearity (INL)  
The maximum deviation of any code from a straight line  
passing through the endpoints of the ADC transfer function.  
The endpoints of the transfer function are zero scale, a point  
½ LSB below the first code transition, and full scale, a point  
½ LSB above the last code transition.  
The theoretical signal to (noise + distortion) ratio for an ideal  
N-bit converter with a sine wave input is given by  
Signal to (Noise + Distortion) = (6.02 N + 1.76) dB  
Thus, for a 12-bit converter, this is 74 dB.  
Differential Nonlinearity (DNL)  
The difference between the measured and the ideal 1 LSB  
change between any two adjacent codes in the ADC.  
Total Harmonic Distortion (THD)  
The ratio of the rms sum of the harmonics to the fundamental.  
DAC SPECIFICATIONS  
Offset Error  
The deviation of the first code transition (0000 . . . 000) to  
(0000 . . . 001) from the ideal, that is, +½ LSB.  
Relative Accuracy  
Otherwise known as endpoint linearity, relative accuracy is a  
measure of the maximum deviation from a straight line passing  
through the endpoints of the DAC transfer function. It is  
measured after adjusting for zero error and full-scale error.  
Gain Error  
The deviation of the last code transition from the ideal AIN  
voltage (full scale − 1.5 LSB) after the offset error has been  
adjusted out.  
Voltage Output Settling Time  
The amount of time it takes the output to settle to within a  
1 LSB level for a full-scale input change.  
Signal to (Noise + Distortion) Ratio (SINAD)  
The measured ratio of signal to (noise + distortion) at the  
output of the ADC. The signal is the rms amplitude of the  
fundamental. Noise is the rms sum of all nonfundamental  
signals up to half the sampling frequency (fS/2), excluding dc.  
Rev. F | Page 38 of 104