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| (R) TDA7315 DIGITAL CONTROLLED AUDIO PROCESSOR 1 STEREO INPUT LOUDNESS FUNCTION VOLUME CONTROL IN 1.25dB STEPS TREBLE AND BASS CONTROL TWO SPEAKERS ATTENUATORS: - INDEPENDENT SPEAKERS CONTROL IN 1.25dB STEPS - INDEPENDENT MUTE FUNCTION ALL FUNCTIONS PROGRAMMABLE VIA SERIAL BUS DESCRIPTION The TDA7315 is a volume, tone (bass and treble) balance (Left/Right) processor for quality audio applications in car radio and Hi-Fi systems. Control is accomplished by serial bus microprocessor interface. The AC signal setting is obtained by resistor networks BLOCK DIAGRAM SO20 DIP 20 ORDERING NUMBER: TDA7315 (DIP 20) TDA7315D (SO 20) and switches combined with operational amplifiers. Thanks to the used BIPOLAR/CMOS Technology, Low Distortion, Low Noise and DC stepping are obtained. July 1998 1/12 TDA7315 PIN CONNECTION (Top view) THERMAL DATA Symbol Rth j-pins Parameter Thermal Resistance Junction-pins Max. SO 20 150 DIP 20 150 Unit C/W ABSOLUTE MAXIMUM RATINGS Symbol VS Tamb Tstg Operating Supply Voltage Operating Ambient Temperature Storage Temperature Range Parameter Value 10.2 -10 to 85 -55 to +150 Unit V C C QUICK REFERENCE DATA Symbol VS VCL THD S/N SC Parameter Supply Voltage Max. input signal handling Total Harmonic Distortion V = 1Vrms f = 1KHz Signal to Noise Ratio Channel Separation f = 1KHz Volume Control 1.25dB step Bass and Treble Control 2db step Balance Control 1.25dB step Mute Attenuation -78.75 -14 -38.75 100 Min. 6 2 0.01 106 103 0 +14 0 0.1 Typ. 9 Max. 10 Unit V Vrms % dB dB dB dB dB dB 2/12 TDA7315 TEST CIRCUIT ELECTRICAL CHARACTERISTICS (refer to the test circuit Tamb = 25C, VS = 9V, RL = 10K, RG = 600, all controls flat (G = 0), f = 1KHz unless otherwise specified) Symbol Parameter Test Condition Min. Typ. Max. Unit SUPPLY VS IS SVR Supply Voltage Supply Current Ripple Rejection 6 60 9 8 80 10 11 V mA dB VOLUME CONTROL RIV CRANGE AVMIN AVMAX ASTEP EA ET VDC Input Resistance Control Range Min. Attenuation Max. Attenuation Step Resolution Attenuation Set Error Tracking Error DC Steps 20 70 -1 70 0.5 -1.25 -3 33 75 0 75 1.25 0 50 80 1 80 1.75 1.25 2 2 3 7.5 k dB dB dB dB dB dB dB mV mV Av = 0 to -20dB Av = -20 to -60dB adjacent attenuation steps From 0dB to Av max 0 0.5 SPEAKER ATTENUATORS Crange SSTEP EA AMUTE VDC Control Range Step Resolution Attenuation set error Output Mute Attenuation DC Steps 35 0.5 80 adjacent att. steps from 0 to mute 37.5 1.25 100 0 1 40 1.75 1.5 3 10 dB dB dB dB mV mV BASS CONTROL (1) Gb BSTEP RB Control Range Step Resolution Internal Feedback Resistance Max. Boost/cut +12 1 34 +14 2 44 +16 3 58 dB dB K 3/12 TDA7315 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter Test Condition Min. Typ. Max. Unit TREBLE CONTROL (1) Gt TSTEP Control Range Step Resolution Max. Boost/cut +13 1 +14 2 +15 3 dB dB AUDIO OUTPUTS VOCL RL CL ROUT VOUT Clipping Level Output Load Resistance Output Load Capacitance Output resistance DC Voltage Level 30 4.2 75 4.5 d = 0.3% 2 2 10 120 4.8 2.5 Vrms K nF V GENERAL eNO Output Noise BW = 20-20KHz, flat output muted all gains = 0dB A curve all gains = 0dB S/N d Signal to Noise Ratio Distortion all gains = 0dB; VO = 1Vrms AV = 0, VIN = 1Vrms AV = -20dB VIN = 1Vrms VIN = 0.3Vrms 80 AV = 0 to -20dB -20 to -60 dB 2.5 5 3 106 0.01 0.09 0.04 103 0 0 1 2 0.1 0.3 V V V dB % % % dB dB dB 15 Sc Channel Separation left/right Total Tracking error BUS INPUTS VIL VIH IIN VO Note: (1) Bass and Treble response see attached diagram (fig.19). The center frequency and quality of the resonance behaviour can be choosen by the external circuitry. A standard first order bass response can be realized by a standard feedback network. Input Low Voltage Input High Voltage Input Current Output Voltage SDA Acknowledge IO = 1.6mA 3 -5 1 +5 0.4 V V A V Figure 1: Loudness versus Volume Attenuation Figure 2: Loudness versus Frequency 4/12 TDA7315 Figure 3: Loudness versus External Capacitors Figure 4: Noise vs. Volume/Gain Settings LOUDNESS VS = 9V Volume = -40dB All other control flat Cin = 2.2F Cloud = 220nF, 100nF, 33nF, 10nF, Open, Shorter to Vref Figure 6: Distortion & Noise vs. Frequency Figure 5: Signal to Noise Ratio vs. Volume Setting Figure 7: Distortion & Noise vs. Frequency Figure 8: Distortion vs. Load Resistance 5/12 TDA7315 Figure 9: Channel Separation (L R) vs. Frequency Figure 10: Supply Voltage Rejection vs. Frequency Figure 11: Output Clipping Level vs. Supply Voltage Figure 12: Quiescent Current vs. Supply Voltage Figure 13: Supply Current vs. Temperature Figure 14: Bass Resistance vs. Temperature 6/12 TDA7315 Figure 15: Typical Tone Response (with the ext. components indicated in the test circuit) SOFTWARE SPECIFICATION Interface Protocol The interface protocol comprises: A start condition (S) A chip address byte, containing the TDA7315 address (the 8th bit of the byte must be 0). The TDA7315 must always acknowledge at the end of each transmitted byte. A sequence of data (N-bytes + acknowledge) A stop condition (P) TDA7315 ADDRESS MSB S 1 0 first byte 0 0 0 0 0 LSB 0 ACK MSB DATA LSB AK C MSB DATA LSB AK P C Data Transferred (N-bytes + Acknowledge) ACK = Acknowledge S = Start P = Stop MAX CLOCK SPEED 100kbits/s SOFTWARE SPECIFICATION Chip address = 80 Hex 1 MSB 0 0 0 0 0 0 0 LSB DATA BYTES MSB 0 1 1 0 0 0 0 0 0 1 1 1 B2 0 1 0 1 1 B1 B1 B1 X 0 1 B0 B0 B0 X C3 C3 A2 A2 A2 L C2 C2 A1 A1 A1 X C1 C1 LSB A0 A0 A0 X C0 C0 FUNCTION Volume control Speaker ATT L Speaker ATT R Loudness Bass control Treble control Ax = 1.25dB steps; Bx = 10dB steps; Cx = 2dB steps; X = don`t care. 7/12 TDA7315 SOFTWARE SPECIFICATION (continued) DATA BYTES (detailed description) Volume MSB 0 0 B2 B1 B0 A2 0 0 0 0 1 1 1 1 0 0 B2 0 0 0 0 1 1 1 1 B1 0 0 1 1 0 0 1 1 B0 0 1 0 1 0 1 0 1 A2 A1 0 0 1 1 0 0 1 1 A1 LSB A0 0 1 0 1 0 1 0 1 A0 FUNCTION Volume 1.25dB steps 0 -1.25 -2.5 -3.75 -5 -6.25 -7.5 -8.75 Volume 10dB steps 0 -10 -20 -30 -40 -50 -60 -70 For example a volume of -45dB is given by: 00100100 Speaker Attenuators MSB 1 1 0 0 0 1 B1 B1 B0 B0 A2 A2 0 0 0 0 1 1 1 1 0 0 1 1 1 0 1 0 1 1 1 1 1 A1 A1 0 0 1 1 0 0 1 1 LSB A0 A0 0 1 0 1 0 1 0 1 FUNCTION Speaker L Speaker R 0 -1.25 -2.5 -3.75 -5 -6.25 -7.5 -8.75 0 -10 -20 -30 Mute For example attenuation of 25dB on speaker R is given by: 10110100 8/12 TDA7315 Loudness MSB 0 1 0 X X L 0 1 X LSB X LOUDNESS ON LOUDNESS OFF FUNCTION x = don`t care For examples Loudness Off can be programmed by the following 8 bit string: 01000100 Bass and Treble 0 0 1 1 1 1 0 1 C3 C3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 C2 C2 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 C1 C1 0 0 1 1 0 0 1 1 1 1 0 0 1 1 0 0 C0 C0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 Bass Treble -14 -12 -10 -8 -6 -4 -2 0 0 2 4 6 8 10 12 14 C3 = Sign For example Bass at -10dB is obtained by the following 8 bit string: 01100010 9/12 TDA7315 SO20 PACKAGE MECHANICAL DATA DIM. MIN. A A1 B C D E e H h L K 10 0.25 0.4 2.35 0.1 0.33 0.23 12.6 7.4 1.27 10.65 0.75 1.27 0.394 0.010 0.016 mm TYP. MAX. 2.65 0.3 0.51 0.32 13 7.6 MIN. 0.093 0.004 0.013 0.009 0.496 0.291 0.050 0.419 0.030 0.050 inch TYP. MAX. 0.104 0.012 0.020 0.013 0.512 0.299 0 (min.)8 (max.) L h x 45 A B e K H D A1 C 20 11 E 1 10 SO20MEC 10/12 TDA7315 DIP20 PACKAGE MECHANICAL DATA DIM. MIN. a1 B b b1 D E e e3 F I L Z 3.3 1.34 8.5 2.54 22.86 7.1 3.93 0.130 0.053 0.254 1.39 0.45 0.25 25.4 0.335 0.100 0.900 0.280 0.155 1.65 mm TYP. MAX. MIN. 0.010 0.055 0.018 0.010 1.000 0.065 inch TYP. MAX. 11/12 TDA7315 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics (c) 1998 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 12/12 |
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