TDA8944J datasheet(8/21 Pages) PHILIPS

8 / 21 page

Philips Semiconductors

TDA8944J

2 x 7 W stereo BTL audio ampliﬁer

Product speciﬁcation

Rev. 02 — 14 February 2000

8 of 21

9397 750 06861

12. Dynamic characteristics

[1]

The noise output voltage is measured at the output in a frequency range from 20 Hz to 20 kHz (unweighted), with a source impedance

Rs =0 Ω at the input.

[2]

Supply voltage ripple rejection is measured at the output, with a source impedance Rs =0 Ω at the input. The ripple voltage is a sine

wave with a frequency fripple and an amplitude of 707 mV (RMS), which is applied to the positive supply rail.

[3]

Output voltage in mute mode is measured with an input voltage of 1 V (RMS) in a bandwidth of 20 kHz, so including noise.

Fig 3.

Quiescent current as function of supply

voltage.

Fig 4.

Quiescent current as function of mode voltage.

handbook, halfpage

VCC (V)

(mA)

MGL954

handbook, halfpage

VMODE (V)

(mA)

MGL955

VCC = 12 V

Table 8:

Dynamic characteristics

VCC =12V; Tamb =25 °C; RL =8 Ω; f = 1 kHz; VMODE = 0 V; measured in test circuit Figure 14; audio pass band

22 Hz to 22 kHz; unless otherwise speciﬁed.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

output power

THD = 10%

THD = 0.5%

THD

total harmonic distortion

Po = 1 W

0.03

0.1

voltage gain

Zi(dif)

differential input impedance

110

Ω

Vn(o)

noise output voltage

[1] -

120

µV

SVRR

supply voltage ripple rejection

fripple = 1 kHz

[2] 50

fripple = 100 Hz

to 20 kHz

[2] -60

Vo(mute)

output voltage

mute mode

[3] --50

µV

αcs

channel separation

Rs =0 Ω

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