Datasheet
3/14
TDA7448
Table 5. Electrical Characteristcs
(refer to the test circuit T
amb
= 25°C, V
S
= 9V, R
L
= 10KΩ, R
G
= 600Ω, unless otherwise specified)
Symbol Parameter Test Condition Min. Typ. Max. Unit
SUPPLY
V
S
Supply Voltage 4.75 9 10 V
I
S
Supply Current 7 mA
SVR Ripple Rejection 80 dB
INPUT STAGE
R
IN
Input Resistance 35 50 65 KΩ
V
CL
Clipping Level THD = 0.3% 2 2.5 Vrms
S
IN
Input Separation The selected input is grounded
through a 2.2µ capacitor
90 dB
VOLUME CONTROL
C
RANGE
Control Range 79 dB
A
VMAX
Max. Attenuation 79 dB
A
STEP
Step Resolution 0.5 1 1.5 dB
E
A
Attenuation Set Error A
V
= 0 to -24dB -1 0 1 dB
A
V
= -24 to -79dB -2.0 0 2.0 dB
E
T
Tracking Error A
V
= 0 to -24dB -1 0 1 dB
A
V
= -24 to -79dB -2 0 2 dB
V
DC
DC Step adyacent attenuation steps -3 0 3 mV
A
mute
Mute Attenuation 90 db
AUDIO OUTPUTS
V
CLIP
Clipping Level THD = 0.3% 2 2.5 Vrms
R
L
Output Load Resistance 2 KΩ
V
DC
DC Voltage Level 4.5 V
GENERAL
E
NO
Output Noise BW = 20Hz to 20KHz
All gains = 0dB, Flat
10 15 µV
S/N Signal to Noise Ratio All gains = 0dB; V
O
= 1Vrms 100 dB
S
C
Channel Separation left/Right 80 90 dB
THD Distortion A
V
= 0; V
I
= 1Vrms 0.01 0.1 %
BUS INPUT
V
Il
Input Low Voltage 1V
V
IH
Input High Voltage 2.5 V
I
IN
Input Current V
IN
= 0.4V -5 5 µA
V
O
Output Voltage SDA
Achnowledge
I
O
= 1.6mA 0.4 0.8 V