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5.4.2Analog-to-Digital(A/D)Performance
5.4.3SpeakerOutputPowerPerformance
MeasurementsforDynamicCharacteristics
Measurementpath:17.LineInput(AIN3L/AIN3R)
csvfile:17_ADC_Line_Input.csv
Table5-3.A/DLineInputParameters
PowerSupplyParameterFilterSettingLeftChannelRightChannel
3.3VTHD+N(–1dBat1kHz)400Hz—20kHzAES-170.009%0.009%
SNR(BPZinput)22Hz—20kHzSPCL+90.4dB90.5dB
A-weighting
DR(–60dBFSinput)22Hz—20kHzAES-17+90.6dB90.3dB
A-weighting
ChannelSeparation22Hz—20kHzAES-1787.8dB87.8dB
(BPZinputfortargetchannel)
ToobtaintheperformanceresultsshowninTable5-3,thespeaker/headphonemoduleshouldbepowered
down,andotherfunctionsshouldbesetwiththeseparameters:
•HeadphoneandSpeakerAmp:Disabled
•DACL-channelandDACR-channel:Disabled
•ALC:Off
•Micboost:0dB
•Analogmixing:Disabled
•AllPGA:0dB
Thebundled.csvfileautomaticallysetsthedevicetotheseconditions.
SeeAppendixA:LineInput(AIN3L/AIN3R)forasignalflowblockdiagram.
Measurementpath:07.StereoSpeakerOutput
csvfile:07_DAC_Stereo_Speaker_Output_8ohms.csv
Table5-4.StereoSpeakerOutputParameters
PowerSupplyParameterSpeakerVolumeR
L
(Ω)SPOLSPOR
3.3VOutputPower+6dB8594.2mW594.1mW
(THD+N=10%)
ToobtaintheperformanceresultsshowninTable5-4,theheadphonemoduleshouldbepowereddown,
andotherfunctionsshouldbesetwiththeseparameters:
•HeadphoneAmp:Disabled
•ADCL-channelandADCR-channel:Disabled
•Speakervolume:+6dB
•ALC:Off
•R
L
:8Ω
Thebundled.csvfileautomaticallysetsthedevicetotheseconditions,exceptforthespeakervolume;
adjustthespeakervolumeto+6dBmanuallyafterthe.csvfileisloaded.
Note:AdjusttheinputsignalleveloftheAudioPrecisionanalyzertomeetthetargetTHD+N=
10%.
SeeAppendixA:StereoSpeakerOutputforasignalflowblockdiagram.
SBAU127–July2007EvaluationandMeasurements57
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