Datasheet

Electrical specifications TDA7376B
10/15 DocID1507 Rev 6
The TDA7376B is equipped with a programmable clipping distortion detector circuitry that
allows to signal out the output stage saturation by providing a current sinking into an open
collector output (DDout) when the total harmonic distortion of the output signal reaches the
preset level.
The desired threshold is fixed through an external divider that produces a proper voltage
level across the THD set pin. Figure 7 shows the THD detection threshold versus the THD
set voltage. Since it is essential that the THD set voltage be proportional to the supply
voltage, Figure 7 shows its value as a fraction of VCC.
The actual voltage can be computed by multiplying the fraction corresponding to the desired
THD threshold by the application’s supply voltage.
C
T
Cross talk
f = 1 kHz; R
g
f = 10 kHz; R
g
-
80
70
-
dB
dB
R
IN
Input Impedance
differential input
Single Ended input
45
40
--
k
k
G
V
Voltage gain
differential input
Single Ended input
25
25
26
26
27
27
dB
dB
G
V
Channel gain balance - - - 1 dB
E
IN
Input Noise Voltage
R
g
= 600 ; "A" weighted
R
g
= 600 ; 22 Hz to 33 kHz
-
3
4
-
6
V
V
SVR Supply Voltage Rejection
f = 100 Hz; V
r
= 1 Vrms; R
g
= 0;
f = 10 Hz; V
r
= 1V rms; R
g
= 0;
45
-
-
55
-
dB
dB
BW Power bandwidth (-3dB) 75 - - kHz
CMRR Common mode rejection ratio V
CM
= 1 Vrms input referred 60 - - dB
A
SB
Standby Attenuation V
SB
= 1.5V; P
O ref
= 1W 80 90 - dB
V
SB IN
Standby In threshold - - - 1.5 V
V
SB OUT
Standby Out threshold - 3.5 - - V
I
sb
Standby current consumption - - - 100 A
A
M
Mute attenuation V
M
= 1.5 V; P
Oref
= 1 W - 85 dB
V
M IN
Mute In threshold - - - 1.5 V
V
M OUT
Mute Out threshold - 3.5 - - V
I6 Mute pin current V6 = 0 to V
S
,; V
S max.
= 18V - - 100 A
D
DL
Distortion detection level
(2)
3.5 - - %
D
DOUT
Distortion detector output dc
current
Output low, sinked current
(V
pin10
= 1.5V)
1--mA
Output high, leakage current
(V
pin10
= V
S
, @ V
Smax
= 18V)
--10A
1. Saturated square wave output.
2. see figure 5 for THD setting.Figure 7.
Table 4. Electrical characteristics (continued)
Symbol Parameter Test condition Min. Typ. Max. Unit