TBA820M Datasheet, PDF (3/5 Pages) STMicroelectronics – 1.2W AUDIO AMPLIFIER

TBA820M
ELECTRICAL CHARACTERISTIVCS
(Unless otherwise specified Vcc=9V,Tamb=25°C)
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Characteristic
Symbol
Test Condition
Min. Typ. Max. Unit
Distortion
Vo ltage Gain
(open loop)
Vo ltage Gain
(closed loop)
THD
Po=500mW RL=8Ω ^Rf=33Ω
f=1kHz
Rf=120Ω
0.8
0.4
%
Gv RL=8Ω f=1kHz
75
dB
Rf=33Ω
45
Gv RL=8Ω f=1kHz
dB
Rf=120Ω
34
Input noise Voltage
V_N Vcc=9V,B(-3dB)=25~20000Hz
3
µA
Input noise current
I_N Vcc=9V,B(-3dB)=25~20000Hz
0.4
nA
Signal to noise ratio (*)
S+N/N
Po=1.2W
Gv=34dB
RL=8Ω ^R1=10kΩ
R1=50kΩ
80
70
dB
Supply voltage rejection
(test circuit of 2)
SVR
RL=8Ω f(ripple)=100Hz
C6=47µF Rf=120Ω
42
dB
(*) B(-3dB)=25~20000Hz
TEST CIRCUIT
1. Circuit diagram with load connected to the supply voltage
Vcc
C2
C4
100uF/15V
C6
RL
6
Vi
R1
10K
3
8
7
CB
1
C5
TBA820M
2
5 _220uF/15V
4 R2
1
Rf
C3
C1
0.22uF