TDA7403 datasheet(4/26 Pages) STMICROELECTRONICS

4 / 26 page

AUDIO PROCESSOR PART

Input Multiplexer

MPX input

Cassette stereo input

AM mono or stereo input

Internal beep with 2 frequencies (selectable)

Mixable phone and beep signals

Loudness

First or second order frequency response

Programmable center frequency and quality factor

15 x 1dB steps

Selectable flat-mode (constant attenuation)

Volume control

1dB attenuator

Max. gain 20dB

Max. attenuation 79dB

Soft-step gain control

Bass Control

2nd order frequency response

Center frequency programmable in 4(5) steps

DC gain programmable

7 x 2dB steps

Treble Control

2nd order frequency response

Center frequency programmable in 4 steps

7 x 2dB steps

Speaker Control

4 independent speaker controls (1dB steps

control range 50dB)

Mute Functions

Direct mute driven by pin SM

Digitally controlled softmute with 4 program-

mable time constants

ELECTRICAL CHARACTERISTICS (VS = 9V; Tamb =25

°C; RL = 10KΩ; all gains = 0dB; f = 1KHz;

unless otherwise specified).

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

INPUT SELECTOR

Rin

Input Resistance

all inputs except Phone

100

130

Ω

VCL

Clipping Level

2.2

2.6

VRMS

SIN

Input Separation

100

GIN MIN

Min. Input Gain

-1

GIN MAX

Max. Input Gain

GSTEP

Step Resolution

VDC

DC Steps

Adjacent Gain Step

GMIN to GMAX

1mV

BEEP CONTROL

VRMS

Beep Level

350

fBMIN

Lower Beep Frequency

600

fBMAX

Higher Beep Frequency

1.2

KHz

MIXING CONTROL

MLEVEL

Mixing Level

Source

-6

Source

-12

Beep/Phone

TDA7403

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