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參數(shù)資料
| 型號： | RHF1201KSO2 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | ADC |
| 英文描述： | 1-CH 12-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO48 |
| 封裝： | LEAD FREE, HERMETIC SEALED, SOP-48 |
| 文件頁數(shù)： | 13/26頁 |
| 文件大?。?/td> | 328K |
| 代理商： | RHF1201KSO2 |
Definitions of specified parameters
RHF1201
20/26
9
Definitions of specified parameters
9.1
Static parameters
Static measurements are performed using the histograms method on a 2 MHz input signal,
sampled at 50 Msps, which is sufficiently high to fully characterize the test frequency
response. The input level is +1 dBFS to saturate the signal.
Differential non-linearity (DNL)
The average deviation of any output code width from the ideal code width of 1 LSB.
Integral non-linearity (INL)
An ideal converter exhibits a transfer function which is a straight line from the starting code
to the ending code. The INL is the deviation from this ideal line for each transition.
9.2
Dynamic parameters
Dynamic measurements are performed by spectral analysis, applied to an input sine wave
of various frequencies and sampled at 50 Msps.
Spurious free dynamic range (SFDR)
The ratio between the power of the worst spurious signal (not always a harmonic) and the
amplitude of the fundamental tone (signal power) over the full Nyquist band. It is expressed
in dBc.
Total harmonic distortion (THD)
The ratio of the rms sum of the first five harmonic distortion components to the rms value of
the fundamental line. It is expressed in dB.
Signal to noise ratio (SNR)
The ratio of the rms value of the fundamental component to the rms sum of all other spectral
components in the Nyquist band (fs/2) excluding DC, fundamental and the first five
harmonics. SNR is reported in dB.
Signal to noise and distortion ratio (SINAD)
Similar ratio as for SNR but including the harmonic distortion components in the noise figure
(not DC signal). It is expressed in dB.
The effective number of bits (ENOB) is easily deduced from the SINAD, using the formula:
SINAD = 6.02
× ENOB + 1.76 dB
When the applied signal is not full scale (FS), but has an amplitude A0, the SINAD
expression becomes:
SINAD = 6.02
× ENOB + 1.76 dB + 20 log (2A0/FS)
The ENOB is expressed in bits.
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