TDA7312 STMicroelectronics, TDA7312 Datasheet

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... IN 1.25dB STEPS - INDEPENDENT MUTE FUNCTION ALL FUNCTIONS PROGRAMMABLE VIA SE- 2 RIAL I C BUS DESCRIPTION The TDA7312 is a volume, tone (bass and treble) balance (Left/Right) processor for quality audio appli- cations. PIN CONNECTION (Top view) November 1999 TDA7312 SDIP30 ORDERING NUMBER: TDA7312 ...

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... TDA7312 TEST CIRCUIT THERMAL DATA Symbol R Thermal Resistance Junction-pins th j-pins ABSOLUTE MAXIMUM RATINGS Symbol Parameter V Operating Supply Voltage S T Operating Ambient Temperature amb T Storage Temperature Range stg QUICK REFERENCE DATA Symbol Parameter V Supply Voltage S V Max. input signal handling CL THD Total Harmonic Distortion V = 1Vrms f = 1KHz ...

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... BLOCK DIAGRAM TDA7312 3/13 ...

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... TDA7312 ELECTRICAL CHARACTERISTICS (refer to the test circuit 600 , all controls flat ( 1KHz unless otherwise specified) G Symbol Parameter SUPPLY V Supply Voltage S I Supply Current S SVR Ripple Rejection INPUT SELECTORS R Input Resistance II V Clipping Level CL S Input Separation ( Output Load resistance L e Input Noise ...

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... BW = 20-20KHz, flat output muted all gains = 0dB A curve all gains = 0dB all gains = 0dB 1Vrms 106 1Vrms 0. -20dB V = 1Vrms 0. 0.3Vrms 0. 103 -20dB V - 1.6mA Figure 2: Signal to Noise Ratio vs. Volume Setting TDA7312 Max. Unit 2.5 Vrms 120 4.5 4 0 0.4 ...

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... TDA7312 Figure 3: Distortion & Noise vs. Frequency Figure 5: Distortion vs. Load Resistance Figure 7: Input Separation (L1 L2, L3, L4) vs. Frequency 6/13 Figure 4: Distortion & Noise vs. Frequency Figure 6: Channel Separation (L R) vs. Frequency Figure 8: Supply Voltage Rejection vs. Frequency ...

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... Figure 9: Output Clipping Level vs. Supply Voltage Figure 11: Supply Current vs. Temperature Figure 13: Typical Tone Response (with the ext. components indicated in the test circuit) Figure 10: Quiescent Current vs. Supply Voltage Figure 12: Bass Resistance vs. Temperature TDA7312 7/13 ...

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... TDA7312 BUS INTERFACE Data transmission from microprocessor to the TDA7312 and viceversa takes place thru the 2 2 wires I C BUS interface, consisting of the two lines SDA and SCL (pull-up resistors to positive supply voltage must be connected). Data Validity As shown in fig. 14, the data on the SDA line must be stable during the high period of the clock ...

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... SOFTWARE SPECIFICATION Interface Protocol The interface protocol comprises: A start condition (s) A chip address byte, containing the TDA7312 TDA7312 ADDRESS MSB first byte LSB ADDR ADDR 0 ACK 2 1 ACK = Acknowledge S = Start P = Stop SOFTWARE SPECIFICATION Chip address ADDR ADDR MSB 2 DATA BYTES MSB ...

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... TDA7312 SOFTWARE SPECIFICATION (continued) DATA BYTES (detailed description) Volume MSB For example a volume of -45dB is given by Speaker Attenuators MSB For example attenuation of 25dB on speaker R is given by 10/13 LSB Volume 1.25dB steps Volume 10dB steps LSB Speaker Speaker FUNCTION 0 -1.25 -2.5 -3.75 -5 -6.25 -7 ...

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... For example Bass at -10dB is obtained by the following 8 bit string Status at Power on Reset Volume = 78.75dB Treble = Bass = +2dB Spkrs Attenuators = Mute Input = Stereo 1 Dig. OUT 1 = Dig. OUT LSB TDA7312 FUNCTION Audio Switch Stereo 1 Stereo 2 Stereo 3 Stereo 4 DIG. OUT DIG. OUT DIG. OUT DIG. OUT Bass C0 Treble 0 -14 1 - 11/13 ...

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... TDA7312 mm inch DIM. MIN. TYP. MAX. MIN. TYP. A 5.08 A1 0.51 0.020 A2 3.05 3.81 4.57 0.12 0.15 B 0.36 0.46 0.56 0.014 0.018 B1 0.76 0.99 1.40 0.030 0.039 C 0.20 0.25 0.36 0.008 0.01 D 27.43 27.94 28.45 1.08 1.10 E 10.16 10.41 11.05 0.400 0.410 E1 8 ...

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... C system, provided that the system conforms to the I STMicroelectronics GROUP OF COMPANIES Australia - Brazil - China - Finland - France - Germany - Hong Kong - India - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S. Patent Rights to use these components Standard Specifications as defined by Philips. http://www.st.com TDA7312 13/13 ...