LA76075 Ver la hoja de datos (PDF) - SANYO -> Panasonic
Número de pieza
componentes Descripción
Fabricante
LA76075 Datasheet PDF : 35 Pages
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LA76075
Audio Block Input Signals and Measurement Conditions
1. Input the left channel signal to pin 1, and input 51 IN and right channel signals to pin 47 and measured at pin 47.
2. Use the following bus control condition: VOL.FIL.DEF = “0.”
Item
Maximum gain
Variable range
Left/right balance
f characteristic
Measurement
Symbol
Point
AGMAX
47, 51
ARANGE
47, 51
ABAR
47, 51
AF
47, 51
Muting
AMUTE
47, 51
Left/right crosstalk
ACT
Total harmonic distortion ATHD
S/N
ASN
47, 51
47, 51
47, 51
Input
Signal
1 KHz, CW
400 mVrms
1 KHz, CW
400 mVrms
1 KHz, CW
400 mVrms
20 KHz, CW
400 mVrms
20 KHz, CW
400 mVrms
20 KHz, CW
400 mVrms
1 KHz, CW
400 mVrms
No signal
Measurement Procedure
Bus Condition
Measure V1, the 1 kHz component (mVrms) at the
output pin, and substitute in the following formula.
AGMAX = 20 × LOG(V1/400) [dB]
VOLUME : 111111
AUDIO.MUTE : 0
Measure V2, the 1 kHz component (mVrms) at the
output pin, and substitute in the following formula.
AGMAX = 20 × LOG(V1/V2) [dB]
VOLUME : 000000
AUDIO.MUTE : 0
Compute the ratio of the left channel output to the right VOLUME : 111111
channel output.
AUDIO.MUTE : 0
Measure V3, the 20 kHz component (mV{rms}) at the
output pin, and substitute in the following formula.
AF = 20 × LOG(V3/V1) [dB]
VOLUME : 111111
AUDIO.MUTE : 0
Set AUDIO.MUTE to “1,” measure V4, the 20 kHz
component at the output pin, and substitute in the VOLUME : 111111
following formula.
AUDIO.MUTE : 1
AMUTE = 20 × LOG(V3/V4) [dB]
Input the left signal only and compute the ratio of the VOLUME : 111111
left channel output to the right channel output.
AUDIO.MUTE : 0
Determine the total harmonic distortion in the 1 kHz VOLUME : 111111
component at the output pin.
AUDIO.MUTE : 0
Measure SV5, the noise level (mVrms) at the output
pin, and substitute in the following formula.
ASN = 20 × LOG(V1/V5) [dB]
VOLUME : 111111
AUDIO.MUTE : 0
No. 5845-16/35
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