TDA7404 Electrical specifications
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3.5 Electrical characteristics
Table 5. Electrical characteristics
(V
S
=9 V; T
amb
=25 °C; R
L
=10 k; all gains = 0 dB; f = 1 kHz; unless otherwise specified)
Symbol Parameter Test conditions Min. Typ. Max. Unit
Input selector
R
in
Input resistance all single ended Inputs 70 100 130 k
V
CL
Clipping level 2.20 2.60 V
RMS
S
IN
Input separation 80 100 dB
G
IN MIN
Min. input gain -1 0 1 dB
G
IN MAX
Max. input gain 18 20 22 dB
G
STEP
Step Resolution 0.5 1 1.5 dB
V
DC
DC Steps
Adjacent gain steps -5 1 5 mV
G
MIN
to G
MAX
-10 5 10 mV
V
offset
Remaining offset with AutoZero 0.5 mV
P differential stereo inputs
R
in
Input resistance
(see Figure 3)
Differential 70 100 130 k
G
CD
Gain
only at true differential
input
-0.75 0 0.75 dB
-5 -6 -7 dB
-11 -12 -13 dB
CMRR Common mode rejection ratio
V
CM
= 1 V
RMS
@ 1 kHz 40 70 dB
V
CM
= 1 V
RMS
@ 10 kHz 40 60 dB
e
NO
Output noise @ speaker-outputs
20 Hz - 20 kHz, flat;
all stages 0 dB
9V
Differential mono input
R
in
Input resistance Differential 39 56 73 k
CMRR Common mode rejection ratio
V
CM
= 1 V
RMS
@ 1 kHz 40 70 dB
V
CM
= 1 V
RMS
@ 10 kHz 40 60 dB
Beep control
V
RMS
Beep level 250 350 500 mV
f
B
Beep frequency
f
B1
740 781 820 Hz
f
B2
1.48 1.56 1.64 kHz
f
B3
1.7 1.8 1.9 kHz
