CS47L24 datasheet(19/256 Pages) CIRRUS

19 / 256 page

CS47L24

Rev 4.1

Test Conditions

The following electrical characteristics are valid across the full range of recommended operating conditions.

Device Reset Thresholds

AVDD Reset Threshold

VAVDD

VAVDD rising

1.56

VAVDD falling

0.92

1.55

DCVDD Reset Threshold

VDCVDD

VDCVDD rising

1.04

VDCVDD falling

0.49

0.64

DBVDD Reset Threshold

VDBVDD

VDBVDD rising

1.54

VDBVDD falling

0.58

1.52

Note that the reset thresholds are derived from simulations only, across all operational and process corners.

Device performance is not assured outside the voltage ranges defined in the “Recommended Operating Conditions” section. Refer to this

section for the CS47L24 power-up sequencing requirements.

TERMINOLOGY

Signal-to-Noise Ratio (dB)

– SNR is a measure of the difference in level between the maximum full scale output signal and the output

with no input signal applied. (Note that this is measured without any mute function enabled.)

Total Harmonic Distortion (dB)

– THD is the ratio of the RMS sum of the harmonic distortion products in the specified bandwidth (see

note below) relative to the RMS amplitude of the fundamental (i.e., test frequency) output.

Total Harmonic Distortion plus Noise (dB)

– THD+N is the ratio of the RMS sum of the harmonic distortion products plus noise in the

specified bandwidth (see note below) relative to the RMS amplitude of the fundamental (i.e., test frequency) output.

Power Supply Rejection Ratio (dB) - PSRR is the ratio of a specified power supply variation relative to the output signal that results from

it. PSRR is measured under quiescent signal path conditions.

Common Mode Rejection Ratio (dB)

– CMRR is the ratio of a specified input signal (applied to both sides of a differential input), relative

to the output signal that results from it.

Channel Separation (L/R) (dB)

– left-to-right and right-to-left channel separation is the difference in level between the active channel

(driven to maximum full scale output) and the measured signal level in the idle channel at the test signal frequency. The active channel

is configured and supplied with an appropriate input signal to drive a full scale output, with signal measured at the output of the

associated idle channel.

Multi-Path Crosstalk (dB)

– is the difference in level between the output of the active path and the measured signal level in the idle path

at the test signal frequency. The active path is configured and supplied with an appropriate input signal to drive a full scale output, with

signal measured at the output of the specified idle path.

Mute Attenuation

– This is a measure of the difference in level between the full scale output signal and the output with mute applied.

All performance measurements are specified with a 20kHz low pass ‘brick-wall’ filter and, where noted, an A-weighted filter. Failure to

use these filters will result in higher THD and lower SNR readings than are found in the Electrical Characteristics. The low pass filter

removes out-of-band noise.

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