TDA1905
ELECTRICAL CHARACTERISTICS
(continued)
Symbol
BW
G
v
G
v
e
N
Parameter
Small signal
bandwidth (-3dB)
Voltage gain (open loop)
Voltage gain (closed loop)
Total input noise
V
s
= 14V
V
s
= 14V
f = 1KHz
V
s
= 14V
f = 1KHz
R
L
= 4Ω
P
o
= 1W
R
g
= 50Ω
R
g
= 1KΩ
R
g
= 10KΩ
R
g
= 50Ω
R
g
= 1KΩ
R
g
= 10KΩ
S/N
Signal to noise ratio
V
s
= 14V
R
g
=
P
o
= 5.5W R
g
=
R
L
= 4Ω
R
g
=
R
g
=
10KΩ
0
10KΩ
0
(°)
39.5
Test conditions
R
L
= 4Ω
P
o
= 1W
Min.
Typ.
40 to 40,000
75
40
1.2
1.3
1.5
2.0
2.0
2.2
90
92
87
87
40.5
Max.
Unit
Hz
dB
dB
µV
4.0
µV
6.0
dB
dB
(°°)
(°)
(°°)
SVR
Supply voltage rejection
R
L
= 8Ω
V
s
= 18V
f
ripple
= 100 Hz
Rg = 10KΩ
V
ripple
= 0.5V
rms
P
tot
= 2.5W
40
50
115
dB
°C
T
sd
Thermal shut-down
case temperatura
(*)
MUTING FUNCTION
VT
OFF
Muting-off threshold
voltage (pin 4)
Muting-on threshold
voltage (pin 4)
Input-resistance (pin 5)
Muting off
Muting on
R
4
A
T
Input resistance (pin 4)
Muting attenuation
R
g
+ R
1
= 10KΩ
150
50
60
1.9
0
6.2
80
200
10
30
4.7
1.3
V
s
KΩ
Ω
KΩ
dB
V
V
VT
ON
R
5
Note:
(°) Weighting filter = curve A.
(°
°)
Filter with noise bandwidth: 22 Hz to 22 KHz.
(*) See fig. 30 and fig. 31
5/14
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