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AN3959 датащи(PDF) 24 Page - STMicroelectronics

номер детали AN3959
подробное описание детали  The purpose of this application note is to describe
PDF  65 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3959 датащи(HTML) 24 Page - STMicroelectronics

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Analog section test results
AN3959
24/65
Doc ID 022081 Rev 3
4
Analog section test results
The line/headphone out can be fed either with an external analog source, or with the F3X
output, allowing the audio content to come from the digital interface on both the power
output and on the line/headphone out.
Table 2.
Test conditions
Conditions
Input
Output
J15, J16 short-circuit & SW2, SW3 switch to HPOUT
STA381BWS F3X
F3X HP OUT
J15, J16 short-circuit & SW2, SW3 switch to LINEOUT
STA381BWS F3X
LINE OUT
J15, J16 open circuit & SW2, SW3 switch to HPOUT
LINE IN
F3X HP OUT
J15, J16 open circuit & SW2, SW3 switch to LINEOUT
LINE IN
LINE OUT
Table 3.
Headphone section test results
Filter: 22K LPF
Ext. Res: 18K + 43K
Headphone
Unit
Spec.
Test results
Reference
mVrms
75 mVrms reference
Maximum output level
mVrms
540 mVrms(10 mW)
542 mV
548 mV
Left
Right
H/P frequency response
-3 dB
↑, +0.5 dB 30 Hz
~20 kHz
-0.4 ~ -0.28
Left
Right
H/P THD+N vs. frequency
dBr
-57
77
77
Left
Right
H/P THD+N vs. level
dBr
-57
77
77
Left
Right
H/P signal-to-noise (20-bit)
dBr
-60
78
78
Left
Right



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