TDA8945 datasheet(8/21 Pages) PHILIPS

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Philips Semiconductors

TDA8945S

15 W mono BTL audio ampliﬁer

Product speciﬁcation

Rev. 02 — 7 April 2000

8 of 21

9397 750 06866

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 700 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.

Table 8:

Dynamic characteristics

VCC =18V; Tamb =25 °C; RL =8 Ω; f = 1 kHz; VMODE = 0 V; measured in test circuit Figure 13; unless otherwise speciﬁed.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

output power

THD = 10%

THD = 0.5%

11.5

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

Fig 5.

Output voltage as function of mode voltage.

handbook, full pagewidth

VMODE (V)

MGU055

412

(V)

10−1

10−6

10−2

10−3

10−4

10−5

VCC = 18 V

12 V

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