TEA7530 datasheet(2/11 Pages) STMICROELECTRONICS

2 / 11 page

FUNCTIONAL DESCRIPTION

TEA7530 performs the following functions:

The circuit amplifies the incoming signal and

feeds it to the loudspeaker.

♦ The Antidistortion system is incorporated for

low current available from line.

♦ The maximum power available on a 50Ω im-

pedance loudspeaker is 25mW at 3V and 100mW

at 5V.

PIN FUNCTION

Symbol

Description

GND

Ground

ADS

Antidistortion

3VLS

Supply

INP

Input Signal

LS1

Output Loudspeaker 1

6VREF

Internal Reference Voltage

LS2

Output Loudspeaker 2

ADJ

Adjust Internal Reference VLS

ELECTRICAL CHARACTERISTICS (Tamb =25

°C, ILS = 30mA unless otherwise specified)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

VLS1

VLS1 Supply

ILS = 2mA (fig. 5)

ILS = 30mA (fig. 5)

2.7

3.15

3.3

3.4

VLSM

VLS Maximum

Ipin8 =40

µA (fig. 5; So = closed)

5.7

VADJ

Voltage Pin 8

ILS = 2 to 30mA (fig. 5

1.0

1.25

1.5

Loudspeaker Amplifier

Gain

V(5) − V(7)

V(4

)

ILS = 30mA (fig. 6)

THD

Distortion

f = 300Hz to 2KHz

V(5) -V(7) = 0.8Vrms; (fig. 6)

ZINPIN

Earphone Input

(fig. 7)

2.1

2.8

3.5

Ω

VOFFS

Output Offset [V(5) -V(7)]

(fig. 6)

-80

GATT

Loudspeaker Attenuated

Gain = [V(5) -V(7)]/ V(4)

V(2) = 0.7V; (fig. 8)

V(2) = 0.4V; (fig. 8)

-30

-20

PIN CONNECTION (top view)

TEA7530

2/11

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