ADAV4601 datasheet(14/60 Pages) AD

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ADAV4601

Rev. B | Page 14 of 60

TERMINOLOGY

Dynamic Range

The ratio of a full-scale input signal to the integrated input noise

in the pass band (20 Hz to 20 kHz), expressed in decibels (dB).

Dynamic range is measured with a −60 dB input signal and is equal

to (S/[THD+N]) + 60 dB. Note that spurious harmonics are below

the noise with a −60 dB input; therefore, the noise level establishes

the dynamic range. The dynamic range is specified with and

without an A-weight filter applied.

Pass Band

The region of the frequency spectrum unaffected by the

attenuation of the filter of the digital decimator.

Pass-Band Ripple

The peak-to-peak variation in amplitude response from equal

amplitude input signal frequencies within the pass band,

expressed in decibels.

Stop Band

The region of the frequency spectrum attenuated by the filter

of the digital decimator to the degree specified by stop-band

attenuation.

Gain Error

With a near full-scale input, the ratio of the actual output to the

expected output, expressed in dB.

Interchannel Gain Mismatch

With identical near full-scale inputs, the ratio of the outputs of

the two stereo channels, expressed in decibels.

Crosstalk

Ratio of response on one channel with a grounded input to a

full-scale 1 kHz sine wave input on the other channel, expressed

in decibels.

Power Supply Rejection

With no analog input, the signal present at the output when a

300 mV p-p signal is applied to power supply pins, expressed in

decibels of full scale.

Group Delay

Intuitively, the time interval required for an input pulse to appear at

the output of the converter, expressed in milliseconds (ms); more

precisely, the derivative of radian phase with respect to radian

frequency at a given frequency.

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