TDA7376B datasheet(5/9 Pages) STMICROELECTRONICS

5 / 9 page

ELECTRICAL CHARACTERISTICS (Refer to the test fig. 1 and 2 circuit, Tamb =25

°C; VS = 14.4V;

f = 1KHz; RL =4

Ω; unless otherwise specified.)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Supply Voltage

Total Quiescent Drain Current

RL =

∞

200

VOS

Output Offset Voltage

120

Output Power

THD = 10%

PO max

Max. Output Power (*)

VS = 14.4V

PO EIAJ

EIAJ Output Power (*)

VS = 13.7V

THD

Distortion

PO = 0.5 to 10W

0.03

0.3

Cross Talk

f = 1KHz; Rg = 0

f = 10KHz; Rg = 0

RIN

Input Resistance

differential input

single ended input

Ω

Voltage Gain

differential input

single ended input

∆GV

Channel Gain Balance

Input Noise Voltage

Rg = 600

Ω; ”A Weighted”

Rg = 600

Ω; 22Hz to 22KHz

µV

SVR

Supply Voltage Rejection

f = 100Hz; Vr = 1Vrms;

Rg = 0

f = 10KHz; Vr = 1Vrms;

Rg = 0

Power Bandwidth

(–3dB)

KHz

CMRR

Common Mode Rejection Ratio

VCM = 1Vrms input referred

ASB

Stand-by Attenuation

VSB = 1.5V; POref =1W

Vsb IN

Stand-by in Threshold

1.5

Vsb OUT

Stand-by out Threshold

3.5

Isb

Stand-by Current Consumption

100

µA

Mute Attenuation

VM = 1.5V; POref =1W

VMIN

Mute in Threshold

1.5

VM OUT

Mute out Threshold

3.5

Mute pin Current

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

100

µA

DDL

Distortion Detection Level (**)

3.5

DDOUT

Distortion Detector Output DC

Current

Output low, sinked current

(Vpin10 = 1.5V)

1mA

Output high, leakage current

(Vpin10 =VS,@ VSmax = 18V)

µA

(*) Saturated square wave output

(**) see figure 5 for THD setting.

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 de-

sired threshold is fixed through an external divider

that produces a proper voltage level across the

THD set pin. Fig. 5 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, fig. 5 shows its value as a

fraction of VCC. The actual voltage can be com-

puted by multiplying the fraction corresponding to

the desired THD threshold by the application’s

supply voltage.

TDA7376B

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