DocID006317 Rev 5

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TDA7449

Electrical characteristics and test circuit

21

Note:

1. The device is functionally good at Vs = 5 V. A step down on Vs to 4 V doesn’t reset the

device.

2. Bass and treble response: the center frequency and the response quality can be chosen

by the external circuitry.

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

Speaker attenuators

CRANGE

Control range

76

dB

SSTEP

Step resolution

0.5

1

1.5

dB

EA

Attenuation set error

AV = 0 to -20 dB

-1.5

0

1.5

dB

AV = -20 to -56 dB

-2

0

2

dB

VDC

DC Step

adjacent attenuation steps

0

3

mV

Amute

Mute attenuation

80

100

dB

Audio outputs

VCLIP

Clipping level

d = 0.3%

2.1

2.6

VRMS

RL

Output load resistance

2

k



RO

Output impedance

10

40

70

W

VDC

DC voltage level

3.8

V

General

ENO

Output noise

All gains = 0dB;

BW = 20Hz to 20KHz flat

515

μV

Et

Total tracking error

AV = 0 to -24dB

0

1

dB

AV = -24 to -47dB

0

2

dB

S/N

Signal-to-Noise ratio

All gains 0dB; VO = 1VRMS ;

106

dB

SC

Channel separation left/right

80

100

dB

d

Distortion

AV = 0; VI = 1VRMS ;

0.01

0.08

%

Bus input

VIL

Input low voltage

1

V

VIH

Input high voltage

3

V

IIN

Input current

VIN = 0.4 V

-5

5

μA

VO

Output voltage SDA

acknowledge

IO = 1.6 mA

0.4

0.8

V

Table 5. Electrical characteristics (refer to the test circuit Tamb = 25 °C, VS = 9 V,

RL= 10 k, RG = 600 , all controls flat (G = 0 dB), unless otherwise specified) (continued)

Obsolete

Product(s)

- Obsolete

Product(s)