WM9093ECSSLASHR datasheet(10/84 Pages) WOLFSON

10 / 84 page

WM9093

Production Data

PD, March 2012, Rev 4.2

Test Conditions

SVDD = 3.6V, HPVDD=1.8V, GND=0V, TA = +25

oC, 1kHz signal, PGA gain = 0dB unless otherwise stated

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Digital Input / Output

Input HIGH Level

0.7



HPVDD

Input LOW Level

0.3



HPVDD

Output HIGH Level

IOL=1mA

0.7



HPVDD

Output LOW Level

IOH=-1mA

0.3



HPVDD

Maximum Signal Level

2.7

Input capacitance

Input leakage

-0.9

0.9

Start-Up Time

Start up time

Speaker and Headphone

Note 1: Total system PSRR with external DC-DC or LDO will be higher.

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.

Total Harmonic Distortion (dB) – THD is the level of the rms value of the sum of harmonic distortion products relative

to the amplitude of the measured output signal.

Total Harmonic Distortion plus Noise (dB) – THD+N is the level of the rms value of the sum of harmonic distortion

products plus noise in the specified bandwidth relative to the amplitude of the measured output signal.

Crosstalk (L/R) (dB) – left-to-right and right-to-left channel crosstalk is the measured signal level in the idle channel at

the test signal frequency relative to the signal level at the output of the active channel. 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.

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 carried out with 20kHz low pass filter, and where noted an A-weighted filter. Failure to

use such a filter 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; although it is not audible it may affect dynamic specification values.

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