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5.4.2 Analog-to-Digital (A/D) Performance
5.4.3 Speaker Output Power Performance
Measurements for Dynamic Characteristics
Measurement path: 17.Line Input (AIN3L/AIN3R)
csv file: 17_ADC_Line_Input.csv
Table 5-3. A/D Line Input Parameters
Power Supply
Parameter
Filter Setting
Left Channel
Right Channel
3.3V
THD+N ( –1dB at 1kHz)
400Hz—20kHz AES-17
0.009%
0.009%
SNR (BPZ input)
22Hz—20kHz SPCL +
90.4dB
90.5dB
A-weighting
DR (–60dBFS input)
22Hz—20kHz AES-17 +
90.6dB
90.3dB
A-weighting
Channel Separation
22Hz—20kHz AES-17
87.8dB
87.8dB
(BPZ input for target channel)
To obtain the performance results shown in
Table 5-3
, the speaker/headphone module should be powered
down, and other functions should be set with these parameters:
•
Headphone and Speaker Amp: Disabled
•
DAC L-channel and DAC R-channel: Disabled
•
ALC: Off
•
Mic boost: 0dB
•
Analog mixing: Disabled
•
All PGA: 0dB
The bundled .csv file automatically sets the device to these conditions.
See
Appendix A
:
Line Input (AIN3L/AIN3R)
for a signal flow block diagram.
Measurement path: 07.Stereo Speaker Output
csv file: 07_DAC_Stereo_Speaker_Output_8ohms.csv
Table 5-4. Stereo Speaker Output Parameters
Power Supply
Parameter
Speaker Volume
R
L
(
Ω
)
SPOL
SPOR
3.3V
Output Power
+6dB
8
594.2mW
594.1mW
(THD+N = 10%)
To obtain the performance results shown in
Table 5-4
, the headphone module should be powered down,
and other functions should be set with these parameters:
•
Headphone Amp: Disabled
•
ADC L-channel and ADC R-channel: Disabled
•
Speaker volume: +6dB
•
ALC: Off
•
R
L
: 8
Ω
The bundled .csv file automatically sets the device to these conditions, except for the speaker volume;
adjust the speaker volume to +6dB manually after the .csv file is loaded.
Note:
Adjust the input signal level of the Audio Precision analyzer to meet the target THD+N =
10%.
See
Appendix A
:
Stereo Speaker Output
for a signal flow block diagram.
SBAU127 – July 2007
Evaluation and Measurements
57
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Summary of Contents for DEM-DAI3793A
Page 1: ...DEM DAI3793A 3794A EVM User s Guide July 2007 AIP Consumer Audio TI Japan SBAU127...
Page 2: ...2 SBAU127 July 2007 Submit Documentation Feedback...
Page 16: ...Description 16 SBAU127 July 2007 Submit Documentation Feedback...
Page 72: ...Schematic PCB Layout and Bill of Materials 72 SBAU127 July 2007 Submit Documentation Feedback...
