GMA7496L Datasheet, PDF (4/11 Pages) Gamma Microelectronics Inc. – 2W+2W AMPLIFIER W/ DC VOLUME CONTROL

Audio Amp.
AA
MICROELECTRONICS
GMA7496L
2W+2W AMPLIFIER W/ DC VOLUME CONTROL
ELECTRICAL CHARACTERISTICS
( Refer to the test circuit V_S = 14V; R_L = 8W, R_g = 50 , Tamb = 25°C).
Parameter
Supply Voltage Range
Total Quiescent Current
Output DC Offset Referred to
SVR Potential
Quiescent Output Voltage
SYMBOL
V_S
I_Q
DCV_OS
V_O
Output Power
P_O
Total Harmonic Distortion
Output Peak Current
Input Signal
Closed Loop Gain
Monitor Out Gain
Attenuation at Minimum Volume
THD
I_peak
V_IN
G_V
G_VLine
A_min V_OL
TEST CONDITIONS
No Input Signal
THD= 10%; R_L= 8W
THD= 1%; R_L= 8W
G_V= 30dB; P_O=1W; f= 1kHz
(Internally Limited)
Vol Ctrl > 4.5V
Vol Ctrl > 4.5V; Zload > 30KW
Vol Ctrl < 0.5V
Min Typ Max Unit
10
18
V
25
50
mA
200
mV
7
V
1.6
2
W
1.3
W
0.4
%
0.7
0.9
A
2.8 Vrms
28.5
30
31.5 dB
-1.5
0
1.5
dB
80
dB
Frequency Response
BW
0.6
MHz
Total Output Noise
f= 20Hz to 22kHz Play, max volume
e_{N f= 20Hz to 22kHz Play, max attenuation}
500
800
µV
100
250
µV
f= 20Hz to 22kHz Mute
60
150
µV
Slew Rate
SR
5
8
V/ µs
Input Resistance
Ri
22.5
30
KW
Variable Output Resistance
Rvar out
30
100
W
Variable Output Load
R_{load var out}
2
KW
f= 1kHz; max volume
C_SVR= 470µF; V_RIP= 1V_rms
35
39
dB
Supply Voltage Rejection
SVR
f= 1kHz; max attenuation
C_SVR= 470µF; V_RIP= 1V_rms
55
65
dB
Thermal Muting
T_M
150
°C
Thermal Shut-Down
T_S
160
°C
MUTE STAND- BY & INPUT SELECTION FUNCTIONS
Stand- by ON Threshold
Stand- by OFF Threshold
Mute ON Threshold
Mute OFF Threshold
Quiescent Current @ Stand- by
Mute Attenuation
Stand- by Bias Current
Mute Attenuation
V_{ST ON}
V_{ST OFF}
V_{M ON}
V_{M OFF}
I_QST-BY
A_MUTE
I_stbyBIAS
Stand by on V_ST-BY= 5V
V_MUTE= 5V
Play or Mute
3.5
V
1.5
V
3.5
V
1.5
V
0.6
1
mA
50
65
dB
80
µA
-20
-5
µA
Mute Bias Current
I_muteBIAS
Mute
Play
1
5
µA
0.2
2
µA
4