Texas Instruments DEM-PCM2912AEVM - DEM-PCM2912A Evaluation Module DEM-PCM2912AEVM DEM-PCM2912AEVM 데이터 시트
제품 코드
DEM-PCM2912AEVM
4.3
Recording Performance
PC
Recording at f = 44.1 kHz by application software
(for example, Sound Recorder, QuickTime, etc.)
(for example, Sound Recorder, QuickTime, etc.)
S
USB
Connector
Connector
D2
D1
SW1
JP1
J1
JP2
J2
100 mA
0 dB
PCM2912A
PCM2912A-EVM
Mic
Headphone
Audio Precision
SYS-2722
Analog Generator
Unbalanced
Floating GND setting
Floating GND setting
Audio Precision
SYS-2722
Digital Analyzer
PC
Volume gain = 0 dB
USB
Connector
Connector
DEM-PCM2704EVM
S/PDIF
Output
Output
Recording Performance
www.ti.com
The DEM-PCM2912A EVM playback performance presented in this section was obtained under the
following conditions:
following conditions:
•
f
S
= 44.1 kHz
•
Input PGA (Microphone input volume): 0 dB
•
Jumper setting: set JP1 to 100 mA and JP2 to 0 dB
•
Application software for playback: Sound Recorder, Media Player and ITunes for Windows Vista/XP;
QuickTime and ITunes for Mac OS X.
QuickTime and ITunes for Mac OS X.
•
Use analog input data provided by the AP2 analog generator (SYS-2722) with unbalanced floating
ground setting.
ground setting.
Configure the equipment as shown in
Figure 4-2. DEM-PCM2912A EVM Configuration for Recording Performance Measurement when
Recording Data
To measure recording performance with the recording data, use S/PDIF digital interface output data.
Connect the EVM to the AP2 digital analyzer (SYS-2722); for example, as the DEM-PCM2704 EVM
shown in
Connect the EVM to the AP2 digital analyzer (SYS-2722); for example, as the DEM-PCM2704 EVM
shown in
Figure 4-3. DEM-PCM2704EVM Configuration for Recording Performance Measurement with Recorded
Data
Table 4-4. Line Input Recording Performance
Power Supply
Performance
Filter Setting
DOUT
5.0 V
THD+N (–1 dB at 1 kHz)
400 Hz to 20 kHz LP
0.008%
SNR (BPZ input)
400 Hz to 20 kHz LP
92.5 dB
+ A-weighting
DR (–60 dB input)
400 Hz to 20 kHz LP
90.5 dB
+ A-weighting
Evaluation and Measurements
36
SBAU141 – January 2009