TDA7438D datasheet(4/17 Pages) STMICROELECTRONICS

4 / 17 page

ELECTRICAL CHARACTERISTICS (continued.)

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

AUDIO OUTPUTS

VCLIP

Clipping Level

d = 0.3%

2.1

2.6

VRMS

Output Load Resistance

Ω

Output Impedance

Ω

VDC

DC Voltage Level

3.8

GENERAL (Gain, Bass, Treble, Middle Controls Flat)

ENO

Output Noise

All gains = 0dB;

BW = 20Hz to 20KHz flat

515

µV

Total Tracking Error

(Volume + Speaker Attenuator)

AV = 0 to -24dB

AV = -24 to -47dB

AV = -47 to -79dB

S/N

Signal to Noise Ratio

All gains 0dB; VO =1VRMS ;

106

Channel Separation Left/Right

100

Distortion

AV =0; VI =1VRMS ;

0.01

0.08

BUS INPUT

VIL

Input Low Voltage

VIH

Input High Voltage

IIN

Input Current

VIN = 0.4V

-5

µA

0/30dB

2dB STEP

MUXOUTL

INL

VOLUME

TREBLE

TREBLE(L)

MIDDLE

MUXOUTR

INR

TREBLE(R)

BOUT(L)

SPKR ATT

LEFT

LOUT

SCL

SDA

DIGGND

ROUT

D96AU490A

2CBUS DECODER + LATCHES

5.6nF

2.2

µF

100K

L-IN1

L-IN2

L-IN3

0.47

µF

0.47

µF

0.47

µF

100K

R-IN1

R-IN2

R-IN3

0.47

µF

0.47

µF

0.47

µF

INPUT MULTIPLEXER

+ GAIN

MOUT(L)

BASS

BIN(L)

18nF

22nF

100nF

2.7K

5.6K

BASS

SPKR ATT

RIGHT

MOUT(R)

BOUT(R)

BIN(R)

5.6nF

18nF

22nF

100nF

2.7K

5.6K

SUPPLY

µF

CREF

AGND

VREF

2.2

µF

TEST CIRCUIT

TDA7438

4/17

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