TDA7319 STMicroelectronics, TDA7319 Datasheet - Page 4

• Manufacturer Part Number: TDA7319
• Description: IC PROCESSOR AUDIO DGTL 20DIP
• Manufacturer: STMicroelectronics
• Type: Tone and Volume Controlr

Specifications of TDA7319

• Applications: Automotive Audio
• Mounting Type: Through Hole
• Package / Case: 20-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 497-3970-5

TDA7319
ELECTRICAL CHARACTERISTICS (continued)
Note 1: the device is functionally good at Vs = 5V. A step down, on V
APPLICATION SUGGESTIONS
The first and the last stages are volume control
blocks. The control range is 0 to -47dB (mute)
with a 1dB step.
The very high resolution allows the implementation
of systems free from any noisy acoustical effect.
The TDA7319 audioprocessor provides 3 bands
tones control.
Bass, Middle Stages
The Bass and the middle cells have the same
structure.
The Bass cell has an internal resistor Ri = 44K
typical.
The Middle cell has an internal resistor Ri = 25K
typical.
Several filter types can be implemented, connect-
ing external components to the Bass/Middle IN
and OUT pins.
Figure 1.
4/16
GENERAL
BUS INPUTS
Symbol
S/N
e
V
V
S
E
V
I
NO
d
in
ih
O
C
t
il
C
IN
Output Noise
Total Tracking Error
Signal to Noise Ratio
Channel Separation
Distortion
Input Low Voltage
Input High Voltage
Input Current
Output Voltage SDA
Acknowledge
1
Ri internal
Parameter
R
D95AU313
2
OUT
C
2
All Gains 0dB (B = 20 to 20kHz flat)
A
A
All Gains = 0dB; V
A
V
I
O
V
V
V
in
= 1.6mA
= 0 to -24dB
= -24 to -47dB
= 0; V
= 0.4V
Test Condition
S
in
, to 4V does’t reset the device.
= 1V
The fig.1 refers to basic T Type Bandpass Filter
starting from the filter component values (R1 in-
ternal and R2,C1,C2 external) the centre fre-
quency Fc, the gain Av at max. boost and the fil-
ter Q factor are computed as follows:
Viceversa, once Fc, Av, and Ri internal value are
fixed, the external components values will be:
Treble Stage
The treble stage is a high pass filter whose time
constant is fixed by an internal resistor (25K
typical) and an external capacitor connected be-
tween treble pins and ground
Typical responses are reported in Figg. 10 to 13.
CREF
The suggested 10 F reference capacitor (CREF)
value can be reduced to 4.7 F if the application
requires faster power ON.
rms
O
C1
= 1V
R2
A
rms
2
F
V
C
A
Q
2
V
R2 C2
2
R
1
i
R2 C1
Min.
R2 C1
Ri R2
80
C1 F
-5
Q
3
A
V
Ri, R2,
R2
C
1
1
Typ.
0.01
106
100
C1
R2 C2
0.4
C1 C2
R2 C2
C2
5
0
0
A
Q
C1, C2
V
2
Ri C1
A
Max.
Q
1 Q
0.08
V
0.8
15
1
2
1
5
2
1
C1
Q
2
Unit
dB
dB
dB
dB
%
V
V
V
V
A