Texas Instruments DEM-PCM2912AEVM User Manual page 17

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4.2.3 Recording Performance
The DEM-PCM2912A EVM playback performance presented in this section was obtained under the following
conditions:
• f = 44.1 kHz
S
• Input PGA (Microphone input volume): 0 dB
• Jumper setting: set S1-1 to Unmute (OFF), S1-2 to 100 mA (ON), and S1-3 to 0 dB (ON)
• Application software for playback: Sound Recorder, Media Player and ITunes for Windows Vista/XP;
QuickTime and ITunes for Mac OS X.
• Use analog input data provided by the AP2 analog generator (SYS-2722) with unbalanced floating ground
setting.
Configure the equipment as shown in
PC
Recording at f = 44.1 kHz by application software
(for example, Sound Recorder, QuickTime, etc.)
USB
Connector
Figure 4-2. DEM-PCM2912A EVM Configuration for Recording Performance Measurement when
Power Supply
5.0 V
SBAU141A – JANUARY 2009 – REVISED APRIL 2024
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Figure 4-2.
S
PCM2912A
D2 D1
SW1
PCM2912A-EVM
Recording Data
Table 4-4. Line Input Recording Performance
Performance
THD+N (–1 dB at 1 kHz)
SNR (BPZ input)
DR (–60 dB input)
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Mic
J1
Headphone
100 mA
JP1 J2
0 dB
JP2
Filter Setting
400 Hz to 20 kHz LP
400 Hz to 20 kHz LP
+ A-weighting
400 Hz to 20 kHz LP
+ A-weighting
DEM-PCM2912A Evaluation Module
Implementation Results
Audio Precision
SYS-2722
Analog Generator
Unbalanced
Floating GND setting
DOUT
0.008%
92.5 dB
90.5 dB
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