免费ADC分辨率计算器
计算模数转换器的分辨率和最小可分辨电压。
bits
V
LSB Size
0.8057 mV
Quantization Levels4,096 levels
Dynamic Range72.2 dB
LSB Size vs ADC Bits
公式
## ADC Resolution ### Formulas **LSB = V_ref / 2^N** **Levels = 2^N** **Dynamic Range = 20 x log10(2^N) dB** N is the number of bits. Each additional bit doubles the resolution and adds 6 dB of dynamic range.
计算示例
12-bit ADC with 3.3 V reference.
- 01Levels = 2^12 = 4096
- 02LSB = 3.3 / 4096 = 0.000806 V = 0.806 mV
- 03Dynamic range = 20 x log10(4096) = 72.2 dB
常见问题
What is ENOB?
Effective Number of Bits accounts for real-world noise and distortion. A 12-bit ADC might have 10.5 ENOB due to noise.
Does higher resolution mean better accuracy?
Not necessarily. Accuracy depends on reference voltage precision, linearity errors, and noise floor.
How does sampling rate relate to resolution?
They are independent specifications. Oversampling can trade speed for effective resolution (averaging).
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