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Philips Semiconductors
TDA8943SF
7 W mono BTL audio amplifier
Preliminary specification 14 April 1999 6 of 12
9397 750 04877
© Philips Electronics N.V. 1999. 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
source
=0Ω at the input.
[2] Supply voltage ripple rejection is measured at the output, with a source impedance R
source
=0Ωat the input. The ripple voltage is a sine
wave with a frequency f
ripple
and an amplitude of 100 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.
13. Application information
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 3; 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--dB
f
ripple
= 100 Hz
to 20 kHz
[2]
- <tbf> - dB
V
o(mute)
output voltage mute mode
[3]
--50µV
Fig 3. Application diagram.
handbook, full pagewidth
MBK943
STANDBY/
MUTE LOGIC
SHORT CIRCUIT
AND
TEMPERATURE
PROTECTION
20
kΩ
20
kΩ
5
TDA8943SF
4
3
1
7
6
V
CC
V
CC
V
CC
1000 µF
10 µF
100 nF
8
2
OUT+
GND
SVR
OUT−
IN−
IN+
MODE
220 nF
R
source
V
i
220 nF
MICROCONTROLLER
R
L
8 Ω
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