TEA7530DP 查看數據表（PDF） - STMicroelectronics

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TEA7530DP

MONITOR AMPLIFIER

STMicroelectronics 

TEA7530

PIN CONNECTION (top view)

PIN FUNCTION

N°

Symbol

1

GND

2

ADS

3

VLS

4

INP

5

LS1

6

VREF

7

LS2

8

ADJ

Ground

Antidistortion

Supply

Input Signal

Output Loudspeaker 1

Internal Reference Voltage

Output Loudspeaker 2

Adjust Internal Reference VLS

Description

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.

ELECTRICAL CHARACTERISTICS (Tamb = 25°C, ILS = 30mA unless otherwise specified)

Symbol

VL S1

Parameter

VLS1 Supply

VLSM

VADJ

G

VLS Maximum

Voltage Pin 8

Loudspeaker Amplifier

Gain =

V(5) − V(7)

V(4)

Test Condition

Min. Typ. Max. Unit

ILS = 2mA (fig. 5)

ILS = 30mA (fig. 5)

2.7

3

3.3

V

3.15 3.4

V

Ipin8 = 40µA (fig. 5; So = closed)

5.7

V

ILS = 2 to 30mA (fig. 5

1.0 1.25 1.5

V

ILS = 30mA (fig. 6)

30

32

34

dB

THD Distortion

ZINPIN

VOFFS

GATT

Earphone Input

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

Loudspeaker Attenuated

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

f = 300Hz to 2KHz

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

(fig. 7)

(fig. 6)

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

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

2

%

2.1

2.8

3.5

KΩ

-80

80

mV

-30

-20

dB

20

30

dB

2/11

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