TDA7497 datasheet(3/7 Pages) STMICROELECTRONICS

3 / 7 page

ELECTRICAL CHARACTERISTICS (Refer to the test circuit, VS + 14V; RL =8

Ω;Rs =50Ω;

f = 1KHz; Tamb =25

°C, unless otherwise specified.)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Supply Range

+20

Total Quiescent Current

Output Power

d = 10%

d= 1%

7.5

Total Harmonic Distortion

PO =1W

PO = 0.1 to 5W f = 0.1 to 15KHz

0.02

0.5

Cross Talk

f = 1KHz

f = 10KHz

Slew Rate

µs

Closed Loop Voltage Gain

∆GV

Voltage Gain Matching

0.2

Total Input Noise

A Curve

f = 20Hz to 22KHz

2.5

3.5

µV

Input Resistance

Ω

SVR

Supply Voltage Rejection

(each channel)

fr = 100Hz; Vripple = 0.5VRMS

Thermal Shut-down

Junction Temperature

145

°C

MUTE FUNCTION [ref: +VS]

VTMUTE

Mute / Play Threshold

-7

-6

-5

Mute Attenuation

STAND-BY FUNCTION [ref: +VS]

VTST-BY

Stand-by / Mute Threshold

-3.5

-2.5

-1.5

AST-BY

Stand-by Attenuation

110

Iq ST-BY

Quiescent Current @ Stand-by

Note :

(*) FULL POWER up to.VS =

±22.5V with RL =8Ω and VS = ±16V with RL =4Ω

MUSIC POWER is the maximal power which the amplifier is capable of producing across the rated load resistance (regardless of non linearity)

1 sec after the application of a sinusoidal input signal of frequency 1KHz.

COMPONENTS

RECOMMENDED

VALUE

PURPOSE

LARGER THAN

RECOMMENDED VALUE

SMALLER THAN

RECOMMENDED VALUE

10K

Ω

Mute Circuit

Increase of Dz

Biasing Current

15K

Ω

Mute Circuit

Vpin # 4 Shifted Downward

Vpin # 4 Shifted Upward

18K

Ω

Mute Circuit

Vpin # 4 Shifted Upward

Vpin # 4 Shifted Downward

15K

Ω

Mute Circuit

Vpin # 4 Shifted Upward

Vpin # 4 Shifted Downward

R5, R6

4.7

Ω

Frequency Stability

Danger of Oscillations

C1, C2

µF

Input DC

Decoupling

Higher Low Frequency

Cutoff

µF

St-By/Mute Time

Constant

Larger On/Off Time

Smaller On/Off Time

C4, C6

1000

µF

Supply Voltage

Bypass

Danger of Oscillations

C5, C7

0.1

µF

Supply Voltage

Bypass

Danger of Oscillations

C8, C9

0.1

µF

Frequency Stability

5.1V

Mute Circuit

APPLICATIONS SUGGESTION

(Demo Board Schematic)

The recommended values of the external compo-

nents are those shown on the demo board sche-

matic. Different values can be used: the following

table can help the designer.

TDA7497

3/7

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