TDA7303 Fast Delivery |IC PHOENIX CO.,LIMITED

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TDA7303
audio processor with loudness
September 2013 Rev 4 1/20
TDA7303
Digital controlled stereo audio processor with loudness
Features Input multiplexer: 3 stereo inputs Selectable input gain for optimal adaptation
to different sources Volume control in 1.25 dB steps Loudness function Treble and bass controL Four speaker attenuators: 4 independent speakers control in 1.25d B
steps for balance and fader facilities Independent mute function All functions programmable via serial I2 C bus
Description
The TDA7303 is a volume, tone (bass and treble)
balance (left/right) and fader (front/rear)
processor for quality audio applications in car
radio, Hi-Fi and portable systems.
Selectable input gain and external loudness
function are provided. Control is accomplished by
serial I2 C bus microprocessor interface.
The AC signal setting is obtained by resistor
networks and switches combined with operational
amplifiers.
Thanks to the used bipolar/CMOS technology, low
distortion, low noise and low DC stepping are
obtained.

Table 1. Device summary
Contents TDA7303
2/20
Contents Block, test and pin diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 T est circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.3 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Quick reference data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.5 Electrical characteristics curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 C bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1 Data validity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2 Start and stop conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.3 Byte format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.4 Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.5 T ransmission without acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Software specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1 Interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2 Subaddress (receive mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3 Data bytes (detailed description) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
TDA7303 List of tables
3/20
List of tables
Table 1. Device summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 3. Quick reference data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 4. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 5. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 6. Chip address. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 7. Data bytes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 8. Volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 9. Speaker attenuators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 10. Audio switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 11. Bass and treble. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 12. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
List of figures TDA7303
4/20
List of figures
Figure 1. Block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3. Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 4. Loudness vs. volume attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 5. Loudness vs. frequency (CLOUD = 100 nF) vs. volume attenuation . . . . . . . . . . . . . . . . . 10
Figure 6. Loudness vs. external capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 7. Noise vs. volume/gain setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 8. Signal to noise ratio vs. volume setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 9. Distortion and noise vs. frequency (VIN = 1 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 10. Distortion and noise vs. frequency (VIN = 250 mV). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 11. Distortion vs. load resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 12. Channel separation (L Æ R) vs. frequency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 13. Input separation (L1 Æ L2, L3) vs. frequency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 14. Supply voltage rejection vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 15. Output clipping level vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 16. Quiescent current vs. supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 17. Supply current vs. temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 18. Bass resistance vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 19. Typical tone response (with the external components indicated in the test circuit) . . . . . . 12
Figure 20. Data validity on the I2 C bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 21. Timing diagram of S-bus and I2 C bus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 22. Acknowledge on the I2 C bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 23. Interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 24. SO-28 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
TDA7303 Block, test and pin diagrams
5/20 Block, test and pin diagrams
1.1 Block diagram
Figure 1. Block diagram
Block, test and pin diagrams TDA7303
6/20
1.2 Test circuit
Figure 2. Test circuit
1.3 Pin connection
Figure 3. Pin connection (top view)
TDA7303 Electrical specifications
7/20
2 Electrical specifications
2.1 Absolute maximum ratings

2.2 Quick reference data

2.3 Thermal data

Table 2. Absolute maximum ratings
Table 3. Quick reference data
Table 4. Thermal data
Electrical specifications TDA7303
8/20
2.4 Electrical characteristics
Table 5. Electrical characteristics
(Tamb = 25 °C, VS = 9 V , RL = 10 k, RG = 600 , all control flat (G = 0), f = 1 kHz unless
otherwise specified)
TDA7303 Electrical specifications
9/20 Bass and treble response see attached diagram (Figure 19). The center frequency and quality of the resonance behavior
can be chosen by the external circuitry. A standard first order bass response can be realized by a standard feedback
network The selected input is grounded through the 2.2 µF capacitor.
Table 5. Electrical characteristics (continued)
(Tamb = 25 °C, VS = 9 V , RL = 10 k, RG = 600 , all control flat (G = 0), f = 1 kHz unless
otherwise specified)
Electrical specifications TDA7303
10/20
2.5 Electrical characteristics curves
Figure 4. Loudness vs. volume attenuation Figure 5. Loudness vs. frequency (CLOUD =
100 nF) vs. volume attenuation
Figure 6. Loudness vs. external capacitors Figure 7. Noise vs. volume/gain setting
Figure 8. Signal to noise ratio vs. volume
setting
Figure 9. Distortion and noise vs. frequency IN = 1 V)

Partno	Mfg	Dc	Qty	Available	Descript
TDA7303	ST	N/a	77	avai	audio processor with loudness