TDA7376PD Electrical specifications
Doc ID 10260 Rev 4 7/14
The TDA7376PD 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 (D
DOUT
) 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 3 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 4 shows its value as a fraction of V
CC
. The actual voltage can be
computed by multiplying the fraction corresponding to the desired THD threshold by the
application’s supply voltage.
R
IN
Input impedance
differential input
Single Ended input
45
40
--k
G
V
Voltage gain
differential input 25 26 27 dB
Single Ended input 25 26 27 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
46
V
SVR Supply voltage rejection
f = 100 Hz; V
r
= 1 Vrms; R
g
= 0;
f = 10 Hz; V
r
= 1 Vrms; R
g
= 0;
45
55
-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
= 1 W 80 90 dB
V
SB IN
Standby input threshold - - - 1.5 V
V
SB OUT
Standby output threshold - 3.5 - - V
I
sb
Standby current consumption V
SB
= 0V - - 20 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
I
6
Mute pin current V
6
= 0 to V
S
,; V
S max.
= 18 V - - 100 A
D
DL
Distortion detection level
(2)
-3.5--%
D
DOUT
Distortion detector output DC
current
Output low, sinked current
(V
pin10
= 1.5 V)
1--mA
Output high, leakage current
(V
pin10
= V
S
, @ V
Smax
= 18 V)
--10A
1. Saturated square wave output
2. See Figure 3 for THD setting.
Table 4. Electrical characteristics (continued)
Symbol Parameter Test condition Min. Typ. Max. Unit
