TDA7432D

TDA7432 ® BASIC FUNCTION AUDIO PROCESSOR ONE STEREO AND ONE MONO INPUTS MUTE FUNCTION (SOFTWARE AND HARDWARE) CONTROLLED VOLUME CONTROL IN 1dB STEP BASS AND TREBLE CONTROL IN 2dB STEP FULLY PROGRAMMABLE LOUDNESS CONTROL FOUR SPEAKER ATTENUATORS: – Independent attenuation control – Independent mute function ALL FUNCTIONS PROGRAMMABLE VIA I2CBUS ) s ( ct u d o r P e SO20 t e l o ORDERING NUMBER: TDA7432D DESCRIPTION The TDA7432 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 net- ) (s t c u BLOCK DIAGRAM b O d o r P e let so IN_L MONO_IN/MUTE IN_R VS s b O works and switches combined with operational amplifiers. Thanks to the advanced BIPOLAR/CMOS Technology, the external components have been reduced. 4.7K 68nF 100nF LOUD_L BINL 6 10 2.7nF 100nF BOUTL TRL 9 11 16 SPKR ATT 3 VOL + LOUD MUX BASS SPKR ATT TREBLE 14 18 4 S BUS DECODER + LATCHES VOL + LOUD MUX 2 17 19 SPKR ATT SUPPLY 20 GND 10µF SPKR ATT TREBLE BASS 1 5 CREF LOUD_R 68nF 8 100nF BINR 7 12 BOUTR TRR 100nF 15 13 LEFT FRONT LEFT REAR SCL SDA RIGHT FRONT RIGHT REAR D95AU357A 2.7nF 4.7K September 2003 1/10 TDA7432 ABSOLUTE MAXIMUM RATINGS Symbol VS Tamb Tstg Parameter Value Unit 10.2 V -40 to 85 °C -55 to +150 °C Operating Supply Voltage Operating Temperature Range Storage Temperature Range QUICK REFERENCE DATA Symbol Parameter VS Supply Voltage Min. Typ. Max. Unit 7 9 10.2 V VCL Max. Input Signal Handling THD Total Harmonic Distortion (V = 1Vrms f = 1kHZ) 1.3 0.05 S/N Signal to Noise Ratio 102 Sc Channel Separation f = 1kHz 100 Volume Control 1dB step -79 Bass Control 2dB step -18 -14 let Mute Attenuation o s b PIN CONNECTION (Top View) Vrms -37.5 100 (s) % t c u od r P e Treble Control 2dB step Speaker Attenuators 1.6 +32 dB dB dB +18 dB +14 dB 0 dB dB O ) s ( t c CREF 1 20 GND IN_R 2 19 SDA IN_L 3 18 SCL MONO_IN/MUTE 4 17 VS LOUD_R 5 16 OUT_LF LOUD_L 6 15 OUT_RF BOUT_R 7 14 OUT_LR BIN_R 8 13 OUT_RR BOUT_L 9 12 TRR 10 11 TRL u d o e t e ol s b O Pr BIN_L D95AU358 THERMAL DATA Symbol Rth j-pins 2/10 Parameter Thermal Resistance Junction-pins Max. Value Unit 150 °C/W TDA7432 APPLICATION CIRCUIT 4.7K 68nF 100nF LOUD_L BINL 6 10 2.7nF 100nF BOUTL TRL 9 11 16 SPKR ATT IN_L 3 VOL + LOUD MUX VS 9V 100nF VS 17 VOL + LOUD MUX so SUPPLY 20 GND 1 5 CREF LOUD_R 4.7µF )- 68nF s ( t c b O 8 100nF BINR P e let TREBLE BASS 7 12 BOUTR TRR 100nF SPKR ATT ) s ( ct 14 du ro S BUS DECODER + LATCHES MONO_IN /MUTE 2 SPKR ATT TREBLE 18 4 IN_R BASS LEFT FRONT 19 SPKR ATT 15 13 LEFT REAR SCL SDA RIGHT FRONT RIGHT REAR D95AU359B 2.7nF 4.7K u d o r P e t e l o s b O 3/10 TDA7432 ELECTRICAL CHARACTERISTICS (Tamb = 25°C, VS = 9V, RL = 10kΩ, Rg = 50Ω, all variable gains = 0dB, f = 1kHz, unless otherwise specified.) Symbol Parameter Test Condition Min. Typ. Max. Unit 70 100 130 kΩ INPUT SELECTOR RIN Input Resistance VCL Clipping Level SIN AMUTE d ≤ 0.3% 1.3 1.6 Vrms Input Separation 70 100 dB Input Mute Attenuation 70 95 dB Mute DC Step VDC MUTE AT AM INPUT (*) 0.2 Input Low Voltage VIL AM not selected Max. Gain AMAX Astep EA Note 2 30.5 32 Max Attenuation 75 79 Step Resolution Attenuation Set Error G = +20 to -20dB 0.5 -1 ET Tracking Error G = -20 to -60dB G = -20 to -60dB VDC DC Steps -2 so From 0dB to -79dB LOUDNESS CONTROL AMAX Control Range Astep RLOUD Step Resolution ) (s Internal Resistor BRANGE BCUT Max. Bass boost Max. Bass cut AStep RB Step Resolution b O t c u BASS CONTROL d o r P e Internal Feedback Resistance TREBLE CONTROL CRANGE Astep let Adjacent Attenuation Steps, Range from 0 to -79dB o s b let Control Range Step Resolution 0.4 V 33.5 dB 83 dB 1.5 +1 dB dB 2 2 dB dB 0.1 4 mV 0.5 10 mV u d o r P e mV ) s ( ct VOLUME CONTROL GMAX 10 1 0 14 15 16 dB 0.5 1 1.5 dB 37 50 63 kΩ 15.5 -20 18 -18 20 -15.5 dB dB 1 2 3 dB 48 65 82 kΩ ±13 1 ±14 2 ±15 3 dB dB 36 0.5 37.5 1 39 1.5 dB dB 70 90 1 dB dB 4 mV SPEAKER ATTENUATORS O CRANGE Astep AMUTE EA VDC Control Range Step Resolution From 0 to -24dB Output Mute Attenuation Attenuation Set Error From 0 to -24dB DC Steps Adjacent Attenuation Steps 0.1 AUDIO OUTPUTS VCLIP Clipping Level GOUT Output Gain (fixed) RL Output Load Resistance CL ROUT Output Load Capacitance Output Impedance VDC DC Voltage Level d = 0.3% 2 2.5 Vrms 4 AC - connected DC connected to GND dB 3 5 3.7 kΩ 30 10 100 nF Ω 4 4.3 V (*) The mute function can be activated without using the I2C bus by grounding the AM input when AM is not selected. This causes the input multiplexer to select the reference voltage instead of an input signal. 4/10 TDA7432 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter Test Condition Min. Typ. Max. Unit GENERAL VS IS PSRR eNO Supply Voltage 6 9 10.2 V Supply Current 5 8 11 mA Power Supply Rejection Ratio Output Noise 65 80 4 7.0 5.5 20Hz - 20kHz "A" - weighted BW = 200Hz - 20kHz, flat output muted S/N Signal to Noise Ratio all gains = 0dB; VO = 1Vrms 103 d Sc Distortion Channel Separation VOUT = 1Vrms 0.05 ET Total Tracking Error AV = 0 to -20dB AV = -20 to -60dB 70 Input Low Voltage VIH IIN Input High Voltage Input Current VO Output Voltage SDA Acknowledge 20 u d o r P e VIN = 0.4V t e l o IO = 1.6mA 0.15 0.15 % ) s ( ct 0 0 3 -5 µV µV µV dB 80 BUS INPUTS VIL dB dB 1 2 dB dB 1 V +5 V µA 0.4 V s b O SOFTWARE SPECIFICATION Interface Protocol The interface protocol comprises: – a start condition (S) – a chip address byte (the LSB bit determines read / write transmission) – a subaddress byte – a sequence of data (N-bytes + acknowledge) – a stop condition (P) ) (s t c u P e CHIP ADDRESS t e l o MSB s b O S 1 d o r 0 0 0 1 0 1 LSB SUBADDRESS MSB R/W ACK X DATA 1...DATA n LSB X X I MSB A3 A2 A1 A0 ACK LSB DATA ACK P ACK = Acknowledge S = Start P = Stop MAX CLOCK SPEED 500kbits/s Auto Increment If bit I in the subaddress byte is set to "1", the autoincrement of the subaddress is enabled. 5/10 TDA7432 SUBADDRESS (receive mode) MSB LSB X X X I A3 0 0 0 0 0 0 0 0 A2 0 0 0 0 1 1 1 1 A1 0 0 1 1 0 0 1 1 A0 0 1 0 1 0 1 0 1 FUNCTION Input selector Volume Bass, Treble Speaker attenuator LF Speaker attenuator LR Speaker attenuator RF Speaker attenuator RR Loudness I = Auto increment X = Not used ) s ( ct DATA BYTE SPECIFICATION X = not relevant; set to "1" during testing Input Selector MSB u d o r P e LSB D6 D7 D5 D4 D3 D2 D1 D0 0 0 0 0 1 0 0 1 1 X 0 1 0 1 X 0 1 0 1 ) (s t e l o FUNCTION IN not used mono no input selected mute (low homic) non-symmetrical bass cut (note 1) symmetrical bass cut extended bass range standard bass range ±14dB s b O t c u For example to select the MONO input the Data Byte is: X X X X 0 1 0. An additional direct mute function is included in the Speaker Attenuators. Note 1: Bass cut for very low frequencies. d o r P e MSB s b O t e l o D7(*) 1 1 1 1 1 1 1 1 1 1 1 1 LSB D6 D5 D4 0 0 0 0 1 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 D3 D2 D1 VOLUME D0 0 0 0 0 0 0 0 0 1 0 1 0 +32dB +16dB 0dB -16dB -32dB -48dB -64dB 0dB -1dB -2dB 1 1 1 1 -15dB (*) Loudness = ON Note 2: It is not recommended to use a gain more than 20dB for system performance reason. In general, the max. gain should be limited by software to the maximum value, which is needed for the system. 6/10 TDA7432 Bass, Treble MSB D7 LSB D6 D5 D4 D4 Input Selector 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 1 1 1 1 0 0 1 1 0 0 0 0 D2 D1 D0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 1 1 0 0 1 1 1 1 0 0 1 1 0 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 FUNCTION Treble Steps - 14dB -12dB -10dB -8dB -6dB -4dB -2dB 0dB 0dB +2dB +4dB +6dB +8dB +10dB +12dB +14dB Bass Steps -18dB -16dB -14dB -12dB -10dB -8dB -6dB -4dB -2dB normal 0dB range 0dB ±14dB +2dB +4dB +6dB +8dB +10dB +12dB +14dB +16dB +18dB ) s ( ct u d o r P e t e l o ) (s s b O t c u d o r P e t e l o 1 0 0 1 0 1 0 1 0 1 1 0 1 0 1 0 1 0 0 1 D3 For example 12dB Treble and -8dB Bass give the following DATA BYTE: 0 0 1 1 1 0 0 1 s b O Speaker Attenuators MSB D7 D6 D5 D4 D3 D2 D1 LSB D0 X X X X 0 0 0 0 0 0 0 0 0 1 X X X X X X X X X X X X X X X X 0 0 0 0 0 0 0 0 0 0 : 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 1 0 1 0 1 0 1 X X 1 X X X 0 0 1 1 0 1 1 1 1 X 0dB -1dB : -24dB -25.5dB -27dB -28.5dB -30dB -32dB -34.5dB -37.5dB X Speaker Mute SPEAKER ATTENUATOR LF, LR, RF, RR 7/10 TDA7432 Loudness MSB LSB D7 D6 D5 D4 D3 D2 D1 D0 X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 D3 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 D2 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 D1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 D0 LOUDNESS 0dB -1dB -2dB : -3dB -4dB -5dB -6dB -7dB -8dB -9dB -10dB -11dB -12dB -13dB -14dB -15dB Loudness flat (Note 3) ) s ( ct u d o r P e For example to select -14dB Loudness the Data Byte is : X X X 0 1 1 1 0. Note3: Fiat attenuation, according to the selected byte. The loudness can be completely disabled by setting bit D7 in the volume byte to "0". In this case the attenuation is 0dB independent from the loudness settings. t e l o ) (s t c u d o r Functional Description The input selector is able to select 1 stereo inputs and 1 mono input (AM). The inputs are DC biased with 100kΩ resistors to the internal reference voltage of 3V. The AM input can be use additionally as hardware mute pin. If this pin is pulled to ground by an external transistor and AM is not selected, the input selector mutes the input (reference voltage selected). The AM part is considered to be switched OFF. If the output of the AM part is not high ohmic in this condition, a series resistor of about 20kΩ has to be foreseen. The volume control can be programmed from a gain of +32dB to an attenuation of -79dB in 1dB steps. The maximum gain should be kept as low as possible for system performance reason. It has to be limited by software to the absolute necessary system gain, depending on the signal source level and the power amplifier gain. The bass control acts in a range from +18dB to 18dB in 2dB steps. The filter response is deter- P e t e l o s b O 8/10 s b O mined by the external filter components. An extensive simulation software is available in order to support the design of the bass filter response with different filter configurations. The extended bass boost range of +18dB allows the implementation of the software loudness function by additional bass and treble boost. The treble control acts in a range of ±14dB in 2dB steps. The external capacitor determines with the internal resistor of 50KΩ the corner frequency of the treble response. The four speaker attenuators can be controlled independently from 0 to -37.5dB, which allows the implementation of balance and fader a the four speaker system. The attenuation steps size is 1 db from 0 to -24dB and increases nonlinearly up to the maximum attenuation of 37.5dB. A special mute bit forces the speaker attenuator into the mute position. All 4 outputs are low distortion push pull outputs, able to drive a load of 3kΩ. TDA7432 mm inch OUTLINE AND MECHANICAL DATA DIM. MIN. TYP. MAX. MIN. TYP. MAX. A 2.35 2.65 0.093 0.104 A1 0.1 0.3 0.004 0.012 B 0.33 0.51 0.013 0.020 C 0.23 0.32 0.009 0.013 D 12.6 13 0.496 0.512 E 7.4 7.6 0.291 0.299 e 1.27 u d o 0.050 H 10 10.65 0.394 0.419 h 0.25 0.75 0.010 0.030 L 0.4 1.27 0.016 0.050 K ) s ( ct 0˚ (min.)8˚ (max.) ) (s r P e t e l o s b O t c u od r P e h x 45˚ A t e l o s b O L SO20 B e A1 K C H D 20 11 E 1 0 1 SO20MEC 9/10 TDA7432 ) s ( ct u d o r P e t e l o ) (s s b O t c u d o r P e t e l o s b O 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. Specifications 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. 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