SA7265 Datasheet, PDF (3/11 Pages) Silan Microelectronics Joint-stock – 2CH AUDIO POWER AMPLIFIER(25W X2)

SA7265
(Continued)
Characteristics
Symbol Test conditions
Cross Talk
f=1KHz
CT
f=10KHz
Slew Rate
SR
Open Loop Voltage Gain
GV
Total Input Noise
A curve
eN
f=20Hz~22KHz
Input Resistance
Ri
Supply Voltage Rejection (each
Fr=100Hz;
SVR
channel)
Vripple=0.5Vrms
Thermal Shut-down
Temperature
Junction
Tj
Mute Function [ref: +Vs]
Mute /Play Threshold
VTMUTE
Mute Attenuation
AMUTE
Stand-by Function [ref: +Vs]
Stand-by /Mute Threshold
VTST-BY
Stand-by Attenuation
AST-BY
Quiescent Current @ Stand-by
Iq ST-BY
Min.
15
-7
60
-3.5
Typ.
70
60
10
80
3
4
20
60
145
-6
70
-2.5
110
3
Max.
8
Unit
dB
dB
V/µs
dB
µV
µV
KΩ
dB
°C
-5
V
dB
-1.5
V
dB
mA
Note:
* Music Output Power is the maximal power which the amplifier is capable of producing across the rated load
resistance (regardless of non linearity) 1 sec after the application of a sinusoidal input signal of frequency 1KHz.
According to this definition, the method of measurement comprises the following steps:
1) Set the voltage supply at the maximum operating value -10%
2) Apply a input signal in the form of a 1KHz tone burst of 1 sec duration; the repetition period of the signal pulses
is > 60 sec
3) The output voltage is measured 1 sec from the start of the pulse
4) Increase the input voltage until the output signal show a THD = 10%
5) The music power is then Vout²/RL, where Vout is the output voltage measured in the condition of point 4) and
R1 is the rated load impedance
The target of this method is to avoid excessive dissipation in the amplifier.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2 2006.05.25
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