1kHz; unless otherwise specified).

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Supply Voltage

12

30

V

Quiescent Output Voltage

11.6

V

Quiescent Drain Current

24

35

mA

Output Power

d = 1%

Ω

Ω

d = 10%

Ω

Ω

Music Power (*)

Ω

6.5

6

5

7.5

6.5

16

W

W

W

W

W

d

Harmonic Distortion

f = 1KHz

f = 10KHz

Ω,

f = 1KHz

f = 10KHz

0.15

0.8

0.12

0.5

0.5

%

%

%

%

Input Impedance

f = 1kHz

30

K

Ω

BW

Small signal bandwidth (-3dB)

20 to 40,000

Hz

Voltage Gain (open loop)

f = 1KHz

75

dB

Voltage Gain (closed loop)

f = 1KHz

39

40

41

dB

Total Input Noise

B = 22 - 22,000Hz

Ω

Ω

Ω

1.7

2

36

mV

µV

µV

S/N

Signal to Noise Ratio

Ω

86

dB

SVR

Supply Voltage Rejection

Ω; f = 100Hz

38

45

dB

Thermal shut-down Junction

Temperature

150

°C

STAND-BY FUNCTION

Symbol

Parameter

Test Condition

Min.

Typ.

Max.

Unit

Pin 5 DC Voltage

SW1 Open (play)

6.4

V

Pin 5 Current

SW1 Closed (st-by)

160

280

µA

Stand-by Attenuation

f = 1kHz

70

90

dB

Stand-by Threshold (pin 5)

3.8

V

Quiescent Current @ Stand-by

2

4

mA

Note (*):

MUSIC POWER CONCEPT

MUSIC POWER is ( according to the IEC clauses n.268-3 of Jan 83) the maximal power which the amplifier is capable of producing across the

rated load resistance (regardless of non linearity) 1 sec after the application of a sinusoidal input signal of frequency 1KHz.

According to this definition our method of measurement comprises the following steps:

1) Set the voltage supply at the maximum operating value -20%

2) Apply a input signal in the form of a 1KHz tone burst of 1 sec duration; the repetition period of the signal pulses is > 60 sec

3) The output voltage is measured 1 sec from the start of the pulse

4) Increase the input voltage until the output signal show a THD = 10%

5) The music power is then V

2

The target of this method is to avoid excessive dissipation in the amplifier.

TDA7245A

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