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.

CT

Cross talk

f = 1 kHz; Rg

f = 10 kHz; Rg

-

80

70

-

dB

dB

RIN

Input Impedance

differential input

Single Ended input

45

40

--

k



k



GV

Voltage gain

differential input

Single Ended input

25

25

26

26

27

27

dB

dB

GV

Channel gain balance

-

-

-

1

dB

EIN

Input Noise Voltage

Rg = 600 ; "A" weighted

Rg = 600 ; 22 Hz to 33 kHz

-

3

4

-

6

V

V

SVR

Supply Voltage Rejection

f = 100 Hz; Vr = 1 Vrms; Rg = 0;

f = 10 Hz; Vr = 1V rms; Rg = 0;

45

-

-

55

-

dB

dB

BW

Power bandwidth

(-3dB)

75

-

-

kHz

CMRR

Common mode rejection ratio

VCM = 1 Vrms input referred

60

-

-

dB

ASB

Standby Attenuation

VSB = 1.5V; PO ref = 1W

80

90

-

dB

VSB IN

Standby In threshold

-

-

-

1.5

V

VSB OUT Standby Out threshold

-

3.5

-

-

V

Isb

Standby current consumption

-

-

-

100

A

AM

Mute attenuation

VM = 1.5 V; POref = 1 W

-

85

dB

VM IN

Mute In threshold

-

-

-

1.5

V

VM OUT

Mute Out threshold

-

3.5

-

-

V

I6

Mute pin current

V6 = 0 to VS,; VS max. = 18V

-

-

100

A

DDL

Distortion detection level(2)

3.5

-

-

%

DDOUT

Distortion detector output dc

current

Output low, sinked current

(

Vpin10 = 1.5V)

1-

-

mA

Output high, leakage current

(Vpin10 = VS, @ VSmax = 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