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1998 Apr 07 6
Philips Semiconductors Product specification
2 × 8 W stereo BTL audio output amplifier
with DC volume control
TDA7057AQ
CHARACTERISTICS
V
P
=12V;T
amb
=25°C; f
i
= 1 kHz; R
L
=16Ω; unless otherwise specified (see Fig.13).
Notes
1. With a load connected to the outputs the quiescent current will increase, the maximum value of this increase being
equal to the DC output offset voltage divided by R
L
.
2. The noise output voltage (RMS value) at f
i
= 500 kHz is measured with R
S
=0Ω and bandwidth = 5 kHz.
3. 20 Hz to 300 kHz (typical.
4. The ripple rejection is measured with R
S
=0Ω and f = 100 Hz to 10 kHz. The ripple voltage (V
ripple
= 200 mV RMS)
is applied to the positive supply rail.
5. The channel unbalance is measured with V
DC1
=V
DC2
.
6. The channel unbalance at G
1
= 0 dB is measured with V
DC1
=V
DC2
.
7. The noise output voltage (RMS value) is measured with R
S
=5kΩ unweighted.
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
P
voltage supply 4.5 − 18.5 V
I
q(tot)
total quiescent current V
P
= 12 V; R
L
= ∞; note 1 − 22 25 mA
Maximum gain; V
1,7
≥ 1.4 V
P
o
output power THD = 10%; R
L
=16Ω 3.0 3.5 − W
THD = 10%; R
L
=8Ω− 5.3 − W
THD=10%; R
L
=8Ω;
V
P
=15V
− 8 − W
THD total harmonic distortion P
o
= 0.5 W − 0.3 1 %
G
v
voltage gain 39.5 40.5 41.5 dB
V
i(rms)
input signal handling (RMS value) G
v
= 0 dB; THD < 1% 1 −−V
V
o(n)
noise output voltage f
i
= 500 kHz; note 2 − 210 −µV
B bandwidth at −1dB − note 3 − dB
SVRR supply voltage ripple rejection note 4 34 38 − dB
V
OS
DC output offset voltage |V
13
-V
11
| and |V
10
-V
8
|− 0 200 mV
Z
i
input impedance (pins 3 and 5) 15 20 25 kΩ
α
cs
channel separation R
S
=5kΩ 40 −−dB
G
v
channel unbalance note 5 −−1dB
G
1
= 0 dB; note 6 −−1dB
Mute position; V
1
=V
7
=0.4 V ±30 mV
V
o(mute)
output voltage in mute position V
i
= 1.0 V; note 7 − 35 45 µV
DC volume control
∆G
v
gain control range 68 73.5 − dB
l
DC
volume control current V
1
=V
7
=0V −20 −25 −30 µA