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Dynamic Range
90.0 dB
Dynamic Range vs Maximum Signal Level
Formule
What is Dynamic Range?
Dynamic range is the ratio between the largest and smallest signals a system can handle, expressed in decibels.
Formula
DR (dB) = Max Signal Level - Noise Floor
Equivalent Bits = (DR - 1.76) / 6.02
The equivalent bits tell you the ADC resolution needed to digitize this range. Each bit adds about 6 dB of dynamic range.
Examples
Exemple Résolu
Receiver with max signal +10 dBm and noise floor -80 dBm.
- 01Dynamic range: 10 - (-80) = 90 dB
- 02Equivalent bits: (90 - 1.76) / 6.02 = 14.7 bits
- 03A 16-bit ADC would cover this range
Questions Fréquentes
What limits dynamic range?
The noise floor sets the lower limit, and compression/clipping sets the upper limit. Both analog and digital stages contribute.
How does dynamic range relate to SFDR?
Spurious-Free Dynamic Range (SFDR) measures from the signal to the largest spurious component, not the noise floor. SFDR is always less than or equal to DR.
Can I extend dynamic range with AGC?
Automatic Gain Control extends the effective input range but does not improve instantaneous dynamic range.
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