TS8388BVFS datasheet(48/57 Pages) ATMEL

48 / 57 page

TS8388B

2144C–BDC–04/03

Definitions

Definition of

Terms

(BER) Bit Error Rate

Probability to exceed a specified error threshold for a sample. An error code is a code that dif-

fers by more than ± 4 lsb from the correct code.

(FPBW) Full Power

Input Bandwidth

Analog input frequency at which the fundamental component in the digitally reconstructed out-

put has fallen by 3 dB with respect to its low frequency value (determined by FFT analysis) for

input at Full Scale.

(SINAD) Signal to Noise

and Distortion Ratio

Ratio expressed in dB of the RMS signal amplitude, set to 1 dB below Full Scale, to the RMS

sum of all other spectral components, including the harmonics except DC.

(SNR) Signal to Noise

Ratio

Ratio expressed in dB of the RMS signal amplitude, set to 1 dB below Full Scale, to the RMS

sum of all other spectral components excluding the five first harmonics.

(THD) Total Harmonic

Distorsion

Ratio expressed in dBc of the RMS sum of the first five harmonic components, to the RMS

value of the measured fundamental spectral component.

(SFDR) Spurious Free

Dynamic Range

Ratio expressed in dB of the RMS signal amplitude, set at 1 dB below Full Scale, to the RMS

value of the next highest spectral component (peak spurious spectral component). SFDR is

the key parameter for selecting a converter to be used in a frequency domain application

(Radar systems, digital receiver, network analyzer, etc.). It may be reported in dBc (i.e.:

degrades as signal levels is lowered), or in dBFS (i.e.: always related back to converter full

scale).

(ENOB) Effective

Number Of Bits

Where A is the actual input amplitude and V is the full scale range of the ADC under test.

(DNL) Differential Non

Linearity

The Differential Non Linearity for an output code i is the difference between the measured step

size of code i and the ideal LSB step size. DNL (i) is expressed in LSBs. DNL is the maximum

value of all DNL (i). DNL error specification of less than 1 lsb guarantees that there are no

missing output codes and that the transfer function is monotonic.

(INL) Integral Non

Linearity

The Integral Non Linearity for an output code i is the difference between the measured input

voltage at which the transition occurs and the ideal value of this transition.

INL (i) is expressed in LSBs, and is the maximum value of all |INL (i)|.

(DG) Differential Gain

The peak gain variation (in percent) at five different DC levels for an AC signal of 20% Full

Scale peak to peak amplitude. F

IN = 5 MHz (TBC).

(DP) Differential Phase

Peak Phase variation (in degrees) at five different DC levels for an AC signal of 20% Full

Scale peak to peak amplitude. F

IN = 5 MHz (TBC).

(TA) Aperture Delay

Delay between the rising edge of the differential clock inputs (CLK, CLKB) (zero crossing

point), and the time at which (V

IN, VINB) is sampled.

SINAD - 1.76 + 20 log (A/V/2)

6.02

ENOB =

TS8388BVFS Datasheet(PDF) 48 Page - ATMEL Corporation

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