AD9430SLASHPCB-CMOS datasheet(11/20 Pages) AD

11 / 20 page

PRELIMINARY TECHNICAL DATA

AD9430

REV. PrG 4/01/2002

-11-

Signal -to-Noise Ratio (without Harmonics)

The ratio of the rms signal amplitude (set at 1 dB below full

scale) to the rms value of the sum of all other spectral

components, excluding the first five harmonics and dc.

Spurious-Free Dynamic Range (SFDR)

The ratio of the rms signal amplitude to the rms value of the

peak spurious spectral component. The peak spurious

component may or may not be a harmonic. May be reported

in dBc (i.e., degrades as signal level is lowered), or dBFS

(always related back to converter full scale).

Two-Tone Intermodulation Distortion Rejection

The ratio of the rms value of either input tone to the rms

value of the worst third order intermodulation product;

reported in dBc.

Two-Tone SFDR

The ratio of the rms value of either input tone to the rms

value of the peak spurious component. The peak spurious

component may or may not be an IMD product. May be

reported in dBc (i.e., degrades as signal level is lowered), or

in dBFS (always related back to converter full scale).

Worst Other Spur

The ratio of the rms signal amplitude to the rms value of the

worst spurious component (excluding the second and third

harmonic) reported in dBc.

Transient Response Time

Transient response is defined as the time it takes for the

ADC to reacquire the analog input after a transient from

10% above negative full scale to 10% below positive full

scale.

Out-of-Range Recovery Time

Out of range recovery time is the time it takes for the ADC

to reacquire the analog input after a transient from 10%

above positive full scale to 10% above negative full scale, or

from 10% below negative full scale to 10% below positive

full scale.

EQUIVALENT CIRCUITS

Figure X Encode and DS Inputs

Figure X Analog Inputs

Figure X S1-S5 Inputs

Figure X VREF, SENSE I/O

Figure X Data Outputs (CMOS Mode)

Figure X Data Outputs (LVDS Mode)

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