TDA7403 datasheet(4/25 Pages) STMICROELECTRONICS

4 / 25 page

AUDIO PROCESSOR PART

Input Multiplexer

MPX input

Cassette stereo input

AM mono

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 = 10K

Ω; 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

VOLUME CONTROL

GMAX

Max Gain

AMAX

Max Attenuation

ASTEP

Step Resolution

Attenuation Set Error

G = -20 to 20dB

-1.25

1.25

G = -60 to 20dB

-4

Tracking Error

2dB

VDC

DC Steps

Adjacent Attenuation Steps

0.1

From 0dB to GMIN

0.5

SOFT MUTE

AMUTE

Mute Attenuation

100

Delay Time

0.48

0.96

40.4

324

VTHlow

Low Threshold for SM Pin

(1)

VTHhigh

High Threshold for SM Pin

2.5

RPU

Internal Pull-up Resistor

100

130

Ω

VPU

Pull-up Voltage

4.7

TDA7403

4/25

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