SGS Thomson Microelectronics TDA7319D, TDA7319 Datasheet
3 BAND DIGITALCONTROLLED AUDIO PROCESSOR
ONE STEREOINPUT
ONE STEREOOUTPUT
TWO INDEPENDENT VOLUME CONTROL IN
1.0dBSTEPS
TREBLE, MIDDLE AND BASS CONTROL IN
1.0dBSTEPS
ALL FUNCTIONS PROGRAMMABLE VIA SE-
2
RIAL I
DESCRIPTION
The TDA7319 is a volume and tone (bass , middle and treble) processor for quality audio applicationin car radio and Hi-Fi system.
Control is accomplished by serial I
processorinterface.
The AC signal setting is obtained by resistor networks and switches combined with operational
amplifiers.
CBUS
2
C bus micro-
TDA7319
DIP20 SO20
ORDERING NUMBERS: TDA7319 (DIP20)
TDA7319D (SO20)
Thanks to the used BIPOLAR/MOS Technology,
Low Distortion, Low Noise and Low Dc stepping
areobtained.
BLOCK DIAGRAM ANDAPPLICATION CIRCUIT
C3
5.6nF
C1 2.2µF
C2 2.2µF
2
L
19
R
1
V
S
SUPPLY
12 20 18 17 16 15 14
1st VOL
TREBLE
1st VOL
TREBLE
CREFAGND
TREBLE(R) MOUT(R)MIN(R) BOUT(R)BIN(L)
REF
C4
5.6nF
C
10µF
R1
2.7K
C5
15nF
MOUT(L)TREBLE(L) MIN(L) BOUT(L)BIN(L)
MIDDLE BASS
MIDDLE BASS
C7
15nF
C6
22nF
SERIAL BUS DECODE &LATCHES
22nF
R2
2.7K
C8
100nF
C11
100nF
C9
5.6K
R4
5.6K
R3
76543
C10
100nF
2nd VOL
2nd VOL
C12
100nF
10
11
13
8
9
OUT L
SCL
SDA
DIGGND
OUT R
D93AU042E
2
I
BUS
C
May 1995
1/16
TDA7319
ABSOLUTE MAXIMUMRATINGS
Symbol Parameter Value Unit
V
S
T
amb
T
stg
PIN CONNECTION
Operating Supply Voltage 10.5 V
Operating Ambient Temperature -40 to 85 °C
Storage Temperature Range -55 to 150 °C
V
IN L
TREBLE L
MINL
M OUT L
BINL
B OUT L
OUT L
SDA
S
1
2
3
4
5
6
7
8
9 GND
20
19
18
17
16
15
14
13
12
C
REF
IN R
TREBLE R
MINR
M OUT R
BINR
B OUT R
OUT R
SCL 10 DIG GND11
D93AU041A
THERMAL DATA
Symbol Parameter DIP20 SO20 Unit
R
th j-amb
Thermal Resistance Junction-pins 150 150 °C/W
QUICK REFERENCEDATA
Symbol Parameter Min. Typ. Max. Unit
V
S
V
CL
THD Total Harmonic Distortion V = 1Vrms f = 1KHz 0.01 0.08 %
S/N Signal to Noise Ratio 106 dB
S
C
2/16
Supply Voltage 6 9 10.5 V
Max. inputsignal handling 2 Vrms
Channel Separation f = 1KHz 100 dB
1st and 2nd Volume Control 1dB step -47 0 dB
Bass, Middle and TrebleControl 1dB step -14 +14 dB
Mute Attenuation 100 dB
TDA7319
ELECTRICAL CHARACTERISTICS (VS= 9V; RL= 10KΩ; f = 1KHz; all control = flat (G = 0); T
25°C Refer to thetest circuit,unless otherwisespecified.)
Symbol Parameter Test Condition Min. Typ. Max. Unit
INPUT
R
in
Input Resistance 35 50 65 KΩ
1st VOLUME CONTROL
C
RANGE
A
VMAX
A
A
V
step
E
E
mute
A
t
DC
Control Range 45 47 49 dB
Maximum Attenuation 45 47 49 dB
Step Resolution 0.5 1.0 1.5 dB
Attenuation Set Error G = 0to -24dB -1.0 1.0 dB
G = -24 to -47dB -1.5 1.5 dB
Tracking Error G = 0 to -24dB 1 dB
G = 24 to -47dB 2 dB
Mute Attenuation 80 100 dB
DC Steps Adiacent Attenuation Steps 0 3 mV
From 0dB to A
VMAX
0.5 5 mV
2nd VOLUME CONTROL
C
RANGE
A
VMAX
A
A
V
step
E
A
E
t
MUTE
DC
Control Range 45 47 49 dB
Maximum Attenuation 45 47 49 dB
Step Resolution 0.5 1.0 1.5 dB
Attenuation Set Error G = 0to -24dB -1.0 1.0 dB
G = -24 to -47dB -1.5 1.5 dB
Tracking Error G = 0 to -24dB 1 dB
G = 24 to -47dB 2 dB
Mute Attenuation 80 100 dB
DC Steps Adiacent Attenuation Steps 0 3 mV
From 0dB to A
VMAX
0.5 5 mV
BASS
C
RANGE
A
R
b
step
Internal Feedback Resistance 32 44 56 KΩ
Control Range ±11.5 ±14 ±16 dB
Step Resolution 0.5 1 1.5 dB
MIDDLE
C
RANGE
A
R
b
step
Internal Feedback Resistance 18 25 32 KΩ
Control Range ±11.5 ±14 ±16 dB
Step Resolution 0.5 1 1.5 dB
TREBLE
C
RANGE
A
step
Control Range ±13 ±14 ±15 dB
Step Resolution 0.5 1 1.5 dB
SUPPLY
V
S
I
S
SVR Ripple Rejection 60 90 dB
Supply Voltage (note1) 6 9 10.5 V
Supply Current 4 7 10 mA
amb
=
AUDIO OUTPUT
V
clip
R
Ol
R
O
V
DC
Clipping Level d = 0.3% 2 2.6 Vrms
Output Load Resistance 2 KΩ
Output Impedance 100 180 300 Ω
DC Voltage Level 3.8 V
3/16
TDA7319
ELECTRICAL CHARACTERISTICS (continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
GENERAL
e
NO
E
t
S/N Signal to Noise Ratio All Gains = 0dB; V
S
C
d Distortion A
BUS INPUTS
V
il
V
ih
I
in
V
O
Note 1: the device is functionally good at Vs = 5V. A step down, on VS, to 4V does’t reset the device.
Output Noise All Gains0dB(B= 20to 20kHzflat) 5 15 µV
Total Tracking Error AV = 0 to -24dB 0 1 dB
= -24 to -47dB 0 2 dB
A
V
=1V
O
rms
Channel Separation 80 100 dB
=0;Vin=1V
V
Input Low Voltage 1V
Input High Voltage 3 V
Input Current Vin = 0.4V -5 5 µA
Output Voltage SDA
Acknowledge
IO= 1.6mA 0.4 0.8 V
rms
106 dB
0.01 0.08 %
APPLICATION SUGGESTIONS
The first and the last stages are volume control
blocks. The control range is 0 to -47dB (mute)
with a 1dB step.
Thevery high resolution allowsthe implementation
ofsystems freefromany noisyacousticaleffect.
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 = 44KΩ
typical.
The Middle cell has an internalresistor Ri = 25KΩ
typical.
Severalfilter types can be implemented,connecting external components to the Bass/Middle IN
and OUTpins.
Figure1.
Ri internal
OUTIN
4/16
C
1
R
2
D95AU313
C
2
The fig.1 refers to basic T Type Bandpass Filter
starting from the filter component values (R1 internal and R2,C1,C2 external) the centre frequency Fc, the gain Av at max. boost and the filter Q factor are computedas follows:
=
F
C
1
2 ⋅ π ⋅√Ri,R2, C1, C2
R2 C2+ R2 C1 + Ri C1
A
=
V
R2 C1 + R2C2
√Ri R2 + C1 C2
Q =
R2 C1 + R2 C2
Viceversa,once Fc, Av, and Ri internal value are
fixed, the external components values will be:
2
Q
⋅ C1
− 1Q
2
A
V
2
C1 =
− 1
A
V
2 ⋅ π ⋅ R
R2 =
⋅ Q
i
− 1− Q
A
V
2 ⋅ π ⋅ C1 ⋅ FC⋅ (AV− 1) ⋅Q
C2 =
Treble Stage
The treble stage is a high pass filter whose time
constant is fixed by an internal resistor (25KΩ
typical) and an external capacitor connected betweentreble pins and ground
Typicalresponsesare reportedin Figg.10 to 13.
CREF
The suggested 10µF reference capacitor (CREF)
value can be reduced to 4.7µF if the application
requiresfaster powerON.
Figure2: Noisevs. volume setting Figure3: SVRRvs. frequency
TDA7319
Figure4: THDvs. frequency Figure5: THDvs. R
LOAD
Figure6: Channelseparation vs. frequency Figure7: Outputclip level vs. Supplyvoltage
5/16
Loading...