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Philips Semiconductors
TDA8944J
2 x 7 W stereo BTL audio amplifier
Product specification Rev. 02 — 14 February 2000 8 of 21
9397 750 06861
© Philips Electronics N.V. 2000. All rights reserved.
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
R
s
=0Ω at the input.
[2] Supply voltage ripple rejection is measured at the output, with a source impedance R
s
=0Ω at the input. The ripple voltage is a sine
wave with a frequency f
ripple
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
50
40
30
20
10
0
0481216
V
CC
(V)
I
q
(mA)
20
MGL954
handbook, halfpage
50
40
30
20
10
0
0481216
V
MODE
(V)
I
q
(mA)
20
MGL955
V
CC
= 12 V
Table 8: Dynamic characteristics
V
CC
=12V; T
amb
=25
°
C; R
L
=8
Ω
; f = 1 kHz; V
MODE
= 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
P
o
output power THD = 10% 6 7 - W
THD = 0.5% 4 5 - W
THD total harmonic distortion P
o
= 1 W - 0.03 0.1 %
G
v
voltage gain 31 32 33 dB
Z
i(dif)
differential input impedance 70 90 110 kΩ
V
n(o)
noise output voltage
[1]
- 90 120 µV
SVRR supply voltage ripple rejection f
ripple
= 1 kHz
[2]
50 65 - dB
f
ripple
= 100 Hz
to 20 kHz
[2]
-60-dB
V
o(mute)
output voltage mute mode
[3]
--50µV
α
cs
channel separation R
s
=0Ω 50 75 - dB