LSB=Vfs/(2^N),Vfs为full scale voltage,N为ADC的分辨率(Resolution)。 2、Offset Error Offset Error通常又被叫做Zero-Scale Error。简单理解,对于ADC,输入的Analog信号,只有抵消(或叠加)Offset Error,才能正常进行AD转换;而对于DAC,输出的Analog信号,必须抵消(或叠加)Offset Error,才能有正常的Analog输出。多用LS...
满量程输入范围(Full Scale Input Range),是指模数转换器上数字化的输入电压的输入范围,既不低于这个范围也不超过这个范围。 比如 V REF + = 3.5V 和 VREF - = 1.5V, FS = (VREF + )-(VREF - ) = 2.0V。 6. 什么是时钟占空比? 时钟占空比(Clock Duty Cycle)是时钟波形高电平时间和一个时钟周期总...
where Full Scale Pin (dBm) = 10 Log ( Vin^2 / Zin ) + 30 and Thermal Noise Power (dBm...
Since LSB size is what we care the most in this application [RTD sensor should be able to respond to with 0.1oC of temperature change] and assume typical ADC with full scale voltage of 5V, you would need a converter withENOB[effective No of Bits] = 1.44ln [full scale range/LSB]= 1.4...
LSB是指最低位⼀个bit的权值，⽐喻ADC是⼀把尺⼦，那LSB则是它的最⼩刻度。LSB=Vfs/(2^N)，Vfs为full scale voltage，N为ADC的分辨率（Resolution）。2、Offset Error Offset Error通常⼜被叫做Zero-Scale Error。简单理解，对于ADC，输⼊的Analog信号，只有抵消（或叠加）Offset Error，才能正常进...
3.Reference Input Voltage参考电压在ADC数模转换的过程扮演着桥梁的作用,为ADC的输入模拟电压提供一个恒定参考。如下图是ADS8688的FSR(Full-scale input range),输入模拟量以参考电压为基准确定。 ADC在系统设计合理的情况下其全温度范围内的精度主要受参考电压的影响。ADS8688内置电压基准4.096V(TYP)。其温飘10ppm/...
我还有疑问是,那这个标幺化,跟实际计算中涉及到的3.3以及运放等系数有什么具体的关联?标幺化电压应该是以 USER_IQ_FULL_SCALE_VOLTAGE_V 为基值吧?电流应该是以 USER_IQ_FULL_SCALE_CURRENT_A 为基值吧? 读到的模拟量转化为数字量后的值,为什么直接就可以标幺化了?有没有相关的转换过程?我想明白的是...
Both full-scale and gain errors are monly used by ADC manufacturers. Nonlinearity Ideally, each code width <LSB> on an ADC's transfer function should be uniform in size. For example, all codes in Figure 2 should represent exactly 1/8th of the ADC's full-scale voltage reference. The ...
对于某一个参考电压来说,如果能测得1.224V所对应的AD转换值(通过ADC1通道17),假设记为Vrefint_ad ,那参考电压VDD对应的AD转换值自然是此时该AD的满量程值FULL_SCALE(12位ADC为4096,10位ADC为1024)。不管VDD怎么变动,某时刻的VDD对应的满量程值FULL_SCALE跟内部基准电压VREFINT的AD转换值Vrefint_ad 的线性比例关...
It is common practice to express this rms noise in terms of LSBs rms, corresponding to an rms voltage referenced to the ADC full-scale input range. If the analog input range is expressed as digital numbers, or counts, input values, such as σ, can be expressed as a count of the ...