TDA7418

TDA7418 3 band car audio processor Features • • Input multiplexer – PD/SE4: pseudo differential stereo input, programmable as single-ended input – SE1: stereo single-end input – SE2: stereo single-end input – SE3: stereo single-end input – Input gain adjust from 0 to 15dB with 1dB steps – Internal offset-cancellation (AutoZero) Loudness – Second order frequency response – Programmable center frequency (400 Hz / 800 Hz / 2400 Hz) – 15dB with 1dB steps – Selectable low and high frequency boost – Selectable flat-mode (constant attenuation) • Volume – +15dB to -79dB with 1dB step resolution – Soft-step control with programmable blend times • Bass – Second order frequency response – Center frequency programmable in 4 steps (60 Hz / 80 Hz / 100 Hz / 200 Hz) – Q programmable 1.0/1.25/1.5/2.0 – DC gain programmable – -15 to 15dB range with 1dB resolution • Middle – Second order frequency response – Center frequency programmable in 4 steps (500 Hz / 1 kHz / 1.5 kHz / 2.5 kHz) Table 1. SO20 – Q programmable 0.5/0.75/1.0/1.25 – -15 to 15dB range with 1dB resolution • Treble – Second order frequency response – Center frequency programmable in 4 steps (10 kHz / 12.5 kHz / 15 kHz / 17.5 kHz) – -15 to 15dB range with 1dB resolution • Speaker – 4 independent soft step speaker controls, +15dB to -79dB with 1dB steps direct mute • Subwoofer – Single-ended mono output – Independent soft step level control, +15dB to -79dB with 1dB steps • Mute functions – Direct mute – Digitally controlled SoftMute with 3 programmable mute-times (0.48 ms / 0.96 ms /123 ms) Description The TDA7418 includes a high performance audio processor with fully integrated 3-Band filters to process signals at audible frequencies. The digital control allows a full programming of the audioprocessor and filters characteristics. Device summary Order code Temp range, C Package Packing TDA7418 -40 to +85 SO20 Tube TDA7418TR -40 to +85 SO20 Tape and reel September 2013 Rev 4 1/29 www.st.com 1 Contents TDA7418 Contents 1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 4 2.1 Connection diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2 Pin list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Electrical specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Description of the audioprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4.1 Input stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4.2 AutoZero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4.3 Loudness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.3.2 Peak frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.3.3 Low and high frequency boost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.3.4 Flat mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.4 SoftMute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.5 SoftStep volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.6 Bass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.7 4.8 4.9 2/29 4.3.1 4.6.1 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.6.2 Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.6.3 Quality factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.6.4 DC mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Middle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.7.1 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.7.2 Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.7.3 Quality factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Treble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.8.1 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.8.2 Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Speaker attenuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 TDA7418 5 Contents 4.10 Subwoofer attenuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.11 MUX output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.12 Audioprocessor testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 I2C bus specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.1 Interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.1.1 Receive mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.1.2 Transmission mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.1.3 Reset condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.2 Subaddress (receive mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 5.3 Data byte specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 6 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 3/29 List of tables TDA7418 List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Table 9. Table 10. Table 11. Table 12. Table 13. Table 14. Table 15. Table 16. 4/29 Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Pin list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Registers of all subaddresses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Subaddress (receive mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Input selector /gain (0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Loudness (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Volume / speaker attenuation (2,7,8,9,10,11). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Treble filter (3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Middle filter (4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Bass filter (5). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Middle / bass Fc select (6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Soft mute and soft step time (12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Testing audio processor (13) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 TDA7418 List of figures List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Figure 17. Figure 18. Figure 19. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Pin out. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Input stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Loudness attenuation @ fC = 400Hz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Loudness center frequencies @ Attn. = 15dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Loudness attenuation, fc = 2.4kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Softmute timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 SoftStep timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Bass control @ fC = 80Hz, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Bass center frequencies @ Gain = 15dB, Q = 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Bass quality factors @ Gain = 14dB, fC = 80Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Bass normal and DC mode @ Gain = 14dB, fC = 80Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Middle control @ fC = 1 kHz, Q = 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Middle center frequencies @ Gain = 14dB, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Bass quality factors @ Gain = 14dB, fC = 1kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Treble control @ fC = 17.5 kHz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Treble center frequencies @ Gain = 14dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 MUX output configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 SO20 mechanical data and package dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 5/29 6/29 7 8 9 5 6 3 4 1 2 DIFFG DIFFR SE1L SE1R SE2L SE2R SE3L SE3R INPUT MULTIPLEXER 3 6 VDD GND CREF 7 SUPPLY InGain AutoZero + Loudness SoftMute 2 19 I CBUS Middle SCL SDA 18 Treble DIGITAL CONTROL Softstep Volume Bass MIX Softstep Mono Fader Softstep Mono Fader Softstep Mono Fader Softstep Mono Fader Softstep Mono Fader AC00057 12 14 15 13 16 OUTSW OUTRR OUTLR OUTRF OUTLF Figure 1. DIFFL 1 17 MUTE/MUXOUT Block diagram TDA7418 Block diagram Block diagram TDA7418 Pin description 2 Pin description 2.1 Connection diagram Figure 2. Pin out SE3L 1 20 VDD SE3R 2 19 SDA SE2L 3 18 SCL SE2R 4 17 MUTE/MUXOUT SE1L 5 16 OUTLF SE1R 6 15 OUTLR DIFFL 7 14 OUTRR DIFFG 8 13 OUTRF DIFFR 9 12 OUTSW CREF 10 11 GND AC00058 2.2 Pin list Table 2. No. Pin list Pin Name Description I/O 1 SE3L Single-ended input 3 left channel I 2 SE3R Single-ended input 3 right channel I 3 SE2L Single-ended input 2 left channel I 4 SE2R Single-ended input 2 right channel I 5 SE1L Single-ended input 1 left channel I 6 SE1R Single-ended input 1 Right channel I 7 DIFFL Pseudo differential stereo input left I 8 DIFFG Pseudo differential stereo input common I 9 DIFFR Pseudo differential stereo input right I 10 CREF Reference capacitor O 11 GND Ground S 12 OUTSW Subwoofer output O 13 OUTRF Front right output O 14 OUTRR Rear right output O 15 OUTLR Rear left output O 16 OUTLF Front left output O 17 MUTE / MUXOUT External mute pin / MUX output I 18 SCL I2C bus clock I 2 19 SDA I C bus data 20 VDD Supply I/O S 7/29 Electrical specification TDA7418 3 Electrical specification 3.1 Absolute maximum ratings Table 3. Absolute maximum ratings Symbol Parameter Value Unit (1) -0.4 to 10.2 -0.4 to VCC + 0.4 V Supply voltage for VCC VS for other pins Top Operating temperature range -40 to +85 °C Tstg Storage temperature -55 to +150 °C VESD ESD protection (Human Body Model) ±2000 V VESD ESD protection (Machine Model) ±200 V VESD ESD protection (Change Device Model) ±750 V 1. Reference level is GND. 3.2 Electrical characteristics Table 4. Electrical characteristics VS = 8.5 V; Tamb= 25 °C; RL= 10 k; all gains = 0 dB; f = 1 kHz; unless otherwise specified Symbol Parameter Test condition Min. Typ. Max. Unit Supply VS Supply voltage 8 8.5 10 V IS Supply current 18 25 32 mA 70 100 130 k Input selector Rin Input resistance All single ended inputs VCL Clipping level 1.8 2 VRMS SIN Input separation 80 100 dB GIN MIN Min. input gain -0.5 0 0.5 dB GIN MAX Max. input gain 14 15 16 dB GSTEP Step resolution 0.5 1 1.5 dB Adjacent gain steps -5 1 5 mV GMIN to GMAX -30 4 30 mV VDC Voffset DC steps Remaining offset with AutoZero 0.5 mV Differential stereo inputs Rin CMRR 8/29 Input resistance Common mode rejection ratio Differential 70 100 130 k VCM=1 VRMS@ 1kHz 40 60 dB VCM=1 VRMS@ 10kHz 40 60 dB TDA7418 Table 4. Electrical specification Electrical characteristics (continued) VS = 8.5 V; Tamb= 25 °C; RL= 10 k; all gains = 0 dB; f = 1 kHz; unless otherwise specified Symbol Parameter eNo Output noise @ speaker outputs Test condition Min. 20Hz-20kHz,flat; all stages 0dB Typ. Max. Unit 12 20 V Loudness control AMAX Max. attenuation -16 -15 -14 dB ASTEP Step resolution 0.5 1 1.5 dB fP1 360 400 440 Hz fP2 720 800 880 Hz fP4 2.1 2.4 2.7 kHz fPeak Peak frequency (1) Volume control GMAX Max. gain 14 15 16 dB AMAX Max. attenuation -84 -79 -74 dB ASTEP Step resolution 0.5 1 1.5 dB G = -20 to +15dB -1 0 1 dB G = -79 to -20dB -4 0 3 dB 2 dB EA Attenuation set error ET Tracking error VDC DC steps Adjacent Attenuation Steps -3 0.1 3 mV From 0dB to GMIN -10 0.5 10 mV 80 100 dB T1 0.48 ms T2 0.96 ms T3 123 ms Soft mute AMUTE TD Mute attenuation Delay time VTH Low Low threshold for SM pin VTH High High threshold for SM pin 2.7 RPU Internal pull-up resistor 32 VPU Internal pull-up voltage 0.7 V V 45 58 3.3 k V Bass control fc Center frequency (1) fC1 54 60 66 Hz fC2 72 80 88 Hz fC3 90 100 110 Hz fC4 180 200 220 Hz 9/29 Electrical specification Table 4. Electrical characteristics (continued) VS = 8.5 V; Tamb= 25 °C; RL= 10 k; all gains = 0 dB; f = 1 kHz; unless otherwise specified Symbol QBASS TDA7418 Parameter Quality factor (1) Test condition Min. Typ. Max. Q1 0.9 1 1.1 Q2 1.1 1.25 1.4 Q3 1.3 1.5 1.7 Q4 1.8 2 2.2 Unit CRANGE Control range 14 15 16 dB ASTEP Step resolution 0.5 1 1.5 dB DCGAIN Bass-DC-gain DC = off DC = on 0 dB 3.5 4.4 6 dB Middle control CRANGE Control range 14 15 16 dB ASTEP Step resolution 0.5 1 1.5 dB fC1 400 500 600 Hz fC2 0.8 1 1.2 kHz fC3 1.2 1.5 1.8 kHz fC4 2 2.5 3 kHz Q1 0.45 0.5 0.55 Q2 0.65 0.75 0.85 Q3 0.9 1 1.1 Q4 1.1 1.25 1.4 Clipping level 14 15 16 dB Step resolution 0.5 1 1.5 dB fC1 8 10 12 kHz fC2 10 12.5 15 kHz fC3 12 15 18 kHz fC4 14 17.5 21 kHz Center frequency (1) fc QBASS Quality factor (1) Treble control CRANGE ASTEP fc Center frequency (1) Speaker attenuator GMAX Max. gain 14 15 16 dB AMAX Max. attenuation -84 -79 -74 dB ASTEP Step resolution 0.5 1 1.5 dB AMUTE Mute attenuation 80 90 EE VDC 10/29 Attenuation set error DC steps Adjacent attenuation steps -5 0.1 dB 2 dB 5 mV TDA7418 Table 4. Electrical specification Electrical characteristics (continued) VS = 8.5 V; Tamb= 25 °C; RL= 10 k; all gains = 0 dB; f = 1 kHz; unless otherwise specified Symbol Parameter Test condition Min. Typ. 1.8 2 Max. Unit Audio outputs VCL ROUT Clipping level Output impedance RL Output load resistance CL Output load capacitor VDC d = 0.3% 30 VRMS 100 2 DC voltage level  k 10 nF 3.8 4.0 4.2 V Subwoofer attenuator GMAX Max. gain 14 15 16 dB AMAX Max. attenuation -84 -79 -74 dB ASTEP Step resolution 0.5 1 1.5 dB AMUTE Mute attenuation 80 90 EE VDC Attenuation set error -5 dB 2 dB 0.1 5 mV 20 V DC steps Adjacent attenuation steps eNO Output noise BW=20Hz to 20 kHz all gain = 0dB 12 S/N Signal to noise ratio all gain = 0dB flat; Vo=2VRMS 100 D Distortion VIN=1VRMS; all stages 0dB SC Channel separation left/right General 0.005 80 dB 0.100 90 % dB 1. Min. and max. values are calculated according to simulation results; functionality is guaranteed by measuring a directly correlated parameter. 11/29 Description of the audioprocessor TDA7418 4 Description of the audioprocessor 4.1 Input stages In the basic configuration, one stereo pseudo differential (programmable as single-ended input) and three single-ended stereo inputs are available. Pseudo differential stereo input (PD/SE4) The PD input is implemented as a buffered pseudo differential stereo stage with 100k input-impedance at each input. The attenuation is fixed to -3dB in order to adapt the incoming signal level. It is also configurable as single-ended input. Single-ended stereo input (SE1, SE2, SE3) The input-impedance at each input is 100k and the attenuation is fixed to -3dB for incoming signals. Figure 3. Input stage QD_L/SE4_L QD_G QD_R/SE4_R QD/SE4 QD/SE4 Input Selector In Gain SE1_L SE1_R SE2_L SE2_R SE3_L SE3_R 4.2 SE1 SE1 SE2 SE2 SE3 SE3 AutoZero The AutoZero allows a reduction of the number of pins as well as external components by canceling any offset generated by or before the In-Gain-stage (Please notice that externally generated offsets, e.g. generated through the leakage current of the coupling capacitors, are not canceled). The auto-zeroing is started every time the input source is changed and needs max. 0.6ms for the alignment. To avoid audible clicks the Audio processor is muted before the loudness stage during this time. AutoZero-remain In some cases, for example if the µP is executing a refresh cycle of the IIC-Busprogramming, it is not useful to start a new AutoZero-action because no new source is 12/29 TDA7418 Description of the audioprocessor selected and an undesired mute would appear at the outputs. For such applications, it can be switched in the AutoZero-Remain-Mode (Bit 6 of the subaddress-byte). If this bit is set to high, the AutoZero will not be invoked and the old adjustment-value remains. 4.3 Loudness There are four parameters programmable in the loudness stage: 4.3.1 Attenuation Figure 4 shows the attenuation as a function of frequency at fC = 400Hz Figure 4. 4.3.2 Loudness attenuation @ fC = 400Hz. Peak frequency Figure 5 shows the four possible peak-frequencies at 400, 800 and 2400Hz Figure 5. Loudness center frequencies @ Attn. = 15dB 13/29 Description of the audioprocessor 4.3.3 TDA7418 Low and high frequency boost Figure 6 shows the different Loudness shapes in low & high frequency boost. Figure 6. 4.3.4 Loudness attenuation, fc = 2.4kHz Flat mode In flat mode the loudness stage works as a 0dB to -15dB attenuator. 4.4 SoftMute The digitally controlled SoftMute stage allows muting/demuting the signal with a I2C-bus programmable slope. The mute process can either be activated by the SoftMute pin or by the I2C-bus. This slope is realized in a special S-shaped curve to mute slow in the critical regions (see Figure 7). For timing purposes the Bit0 of the I2C-bus output register is set to 1 from the start of muting until the end of demuting. Figure 7. Softmute timing EXT. MUTE 1 +SIGNAL REF -SIGNAL 1 2 I C BUS OUT D97AU634 Time 1. Please notice that a started Mute-action is always terminated and could not be interrupted by a change of the mute-signal 14/29 TDA7418 4.5 Description of the audioprocessor SoftStep volume When the volume-level is changed audible clicks could appear at the output. The root cause of those clicks could either be a DC-Offset before the volume-stage or the sudden change of the envelope of the audio signal. With the SoftStep-feature both kinds of clicks could be reduced to a minimum and are no more audible. Eight programmable softstep time from one step to the next are user selectable. Figure 8. SoftStep timing VOUT 1dB 0.5dB Time SS Time -0.5dB -1dB D00AU1170 1. For steps more than 1dB the SoftStep mode should be deactivated because it could generate 1dB error step during the blend-time. 4.6 Bass There are four parameters programmable in the bass stage: 4.6.1 Attenuation Figure 9 shows the attenuation as a function of frequency at a center frequency of 80Hz. Figure 9. Bass control @ fC = 80Hz, Q = 1 15/29 Description of the audioprocessor 4.6.2 TDA7418 Center frequency Figure 10 shows the four possible center frequencies 60, 80, 100 and 200Hz. Figure 10. Bass center frequencies @ Gain = 15dB, Q = 1 4.6.3 Quality factors Figure 11 shows the four possible quality factors 1, 1.25, 1.5 and 2. Figure 11. 4.6.4 Bass quality factors @ Gain = 14dB, fC = 80Hz DC mode In this mode the DC-gain is increased by 4.4dB. In addition the programmed center frequency and quality factor is decreased by 25% which can be used to reach alternative center frequencies or quality factors. Figure 12. Bass normal and DC mode @ Gain = 14dB, fC = 80Hz 1. The center frequency, Q and DC-mode can be set fully independently. 16/29 TDA7418 4.7 Description of the audioprocessor Middle There are three parameters programmable in the middle stage: 4.7.1 Attenuation Figure 13 shows the attenuation as a function of frequency at a center frequency of 1kHz. Figure 13. Middle control @ fC = 1 kHz, Q = 1 4.7.2 Center frequency Figure 14 shows the four possible center frequencies 500Hz, 1kHz, 1.5kHz and 2.5kHz. Figure 14. Middle center frequencies @ Gain = 14dB, Q = 1 4.7.3 Quality factors Figure 15 shows the four possible quality factors 0.5, 0.75, 1 and 1.5. Figure 15. Bass quality factors @ Gain = 14dB, fC = 1kHz 17/29 Description of the audioprocessor 4.8 TDA7418 Treble There are two parameters programmable in the treble stage: 4.8.1 Attenuation Figure 16 shows the attenuation as a function of frequency at a center frequency of 17.5kHz. Figure 16. Treble control @ fC = 17.5 kHz 4.8.2 Center frequency Figure 17 shows the four possible center frequencies 10k, 12.5k, 15k and 17.5kHz. Figure 17. Treble center frequencies @ Gain = 14dB 4.9 Speaker attenuator The four speakers have independent soft step speaker controls. And their attenuators can be adjusted from +15dB to -79dB with 1dB steps. 4.10 Subwoofer attenuator The Subwoofer output is a single ended mono output. The attenuator is exactly the same like the other speakers. 18/29 TDA7418 4.11 Description of the audioprocessor MUX output It provides a mono signal output (before tone filters) at Mute/MUX pin, used for external level meter / spectrum analyzer. The mute pin can be configured as MUX output (I2C Byte13_D7D1). When it is configured as MUX output, the output voltage is (InGainL+InGainR)/2 with -3dB attenuation. Figure 18. MUX output configuration InGainL + MUTE/MUX = (InGainL+InGainR)/2 * (-3dB) AC00059 InGainR 4.12 Audioprocessor testing In the test mode, which can be activated by setting bit D7 of the IIC subaddress byte and bit D0 of the testing audioprocessor byte, several internal signals are available at the SE2R pin. In this mode, the input resistance of 100kOhm is disconnected from the pin. Internal signals available for testing are listed in the data-byte specification. 19/29 I2C bus specification TDA7418 5 I2C bus specification 5.1 Interface protocol The interface protocol comprises: – 5.1.1 S a start condition (S) – a chip address byte (the LSB determines read/write transmission) – a subaddress byte – a sequence of data (N-bytes + acknowledge) – a stop condition (P) – the max. clock speed is 500kbits/s Receive mode 1 0 0 0 1 S= 0 0 R/W ACK TS AZ AI A4 A3 A2 A1 A0 ACK DATA ACK P Start R/W = "0" -> Receive Mode (Chip can be programmed by P) "1" -> Transmission Mode (Data could be received by P) ACK = Acknowledge P= Stop TS = Testing mode AZ = Auto zero remain AI = 5.1.2 S Auto increment Transmission mode 1 0 0 0 1 0 0 R/W ACK X X X X X X X SM ACK P SM = Soft mute activated for main channel X = Not Used The transmitted data is automatic updated after each ACK. Transmission can be repeated without new chip address. 5.1.3 Reset condition A Power-On-Reset is invoked if the Supply-Voltage is below than 2.5V. After that the following data is written automatically into the registers of all subaddresses: Table 5. Registers of all subaddresses MSB 1 20/29 LSB 1 1 1 1 1 1 0 I2C bus specification TDA7418 5.2 Subaddress (receive mode) Table 6. Subaddress (receive mode) MSB LSB Function I2 I1 I0 A4 A3 A2 A1 A0 Testing Mode Off On 0 1 Auto Zero Remain Off On 0 1 Auto Increment Mode Off On 0 1 0 0 0 0 0 Main Source Selector 0 0 0 0 1 Loudness 0 0 0 1 0 Volume 0 0 0 1 1 Treble 0 0 1 0 0 Middle 0 0 1 0 1 Bass 0 0 1 1 0 Middle/ Bass Fc Select 0 0 1 1 1 Speaker Attenuator Left Front 0 1 0 0 0 Speaker Attenuator Left Rear 0 1 0 0 1 Speaker Attenuator Right Rear 0 1 0 1 0 Speaker Attenuator Right Front 0 1 0 1 1 Subwoofer Attenuator 0 1 1 0 0 Soft Mute / Soft Step 0 1 1 0 1 Testing Audio Processor 21/29 I2C bus specification 5.3 TDA7418 Data byte specification Table 7. Input selector /gain (0) MSB LSB Function D7 D6 0 0 : 1 1 D5 0 0 : 1 1 D4 0 0 : 1 1 D3 D2 D1 D0 0 0 0 0 1 0 0 1 1 X 0 1 0 1 X Source Selector PD/SE4 SE1 SE2 SE3 mute Input Gain 0dB 1dB : 14dB 15dB 0 1 : 0 1 Diffin Mode Single Ended Stereo Differential Stereo 0 1 Table 8. Loudness (1) MSB LSB Function D7 D6 0 0 1 0 1 22/29 D5 0 0 1 1 D4 0 1 0 1 D3 D2 D1 D0 0 0 : 1 1 0 0 : 1 1 0 0 : 1 1 0 1 : 0 1 Attenuation 0dB -1dB : -14dB -15dB Filter/Center Frequency Off (Flat) D6 must be = 0 400Hz 800Hz 2400Hz Shape Low Boost Low & HighBoost Loudness Soft Step on off I2C bus specification TDA7418 Table 9. Volume / speaker attenuation (2,7,8,9,10,11) MSB LSB Function D7 D6 D5 D4 D3 D2 D1 D0 0 0 : 0 0 0 0 : 0 0 : 1 1 1 0 0 : 0 0 0 0 : 0 1 : 0 0 1 0 0 : 0 0 1 1 : 1 0 : 1 1 x 1 1 : 0 0 0 0 : 1 0 : 1 1 x 1 1 : 0 0 0 0 : 1 0 : 1 1 x 1 1 : 0 0 0 0 : 1 0 : 1 1 x 1 0 : 1 0 0 1 : 1 0 : 0 1 x Gain/Attenuation +15dB +14dB : +1dB 0dB 0dB -1dB : -15dB -16dB : -78dB -79dB Mute Volume Soft Step on off 0 1 Table 10. Treble filter (3) MSB LSB Function D7 D6 D5 D4 0 0 : 0 0 1 1 : 1 1 0 0 1 1 1 0 1 0 1 D3 0 0 : 1 1 1 1 : 0 0 D2 0 0 : 1 1 1 1 : 0 0 D1 0 0 : 1 1 1 1 : 0 0 D0 0 1 : 0 1 1 0 : 1 0 Gain/Attenuation -15dB -14dB : -1dB 0dB 0dB +1dB : +14dB +15dB Treble Center Frequency 10.0kHz 12.5kHz 15.0kHz 17.5kHz Must be “1” 23/29 I2C bus specification TDA7418 Table 11. Middle filter (4) MSB LSB Function D7 D6 0 0 1 1 0 1 24/29 D5 0 1 0 1 D4 D3 D2 D1 D0 0 0 : 0 0 1 1 : 1 1 0 0 : 1 1 1 1 : 0 0 0 0 : 1 1 1 1 : 0 0 0 0 : 1 1 1 1 : 0 0 0 1 : 0 1 1 0 : 1 0 Gain/Attenuation -15dB -14dB : -1dB 0dB 0dB +1dB : +14dB +15dB Middle Q Factor 0.5 0.75 1 1.25 Middle Soft Step on off I2C bus specification TDA7418 Table 12. Bass filter (5) MSB LSB Function D7 D6 0 0 1 1 D5 D4 D3 D2 D1 D0 0 0 : 0 0 1 1 : 1 1 0 0 : 1 1 1 1 : 0 0 0 0 : 1 1 1 1 : 0 0 0 0 : 1 1 1 1 : 0 0 0 1 : 0 1 1 0 : 1 0 Gain/Attenuation -15dB -14dB : -1dB 0dB 0dB +1dB : +14dB +15dB Bass Q Factor 1.0 1.25 1.5 2.0 0 1 0 1 Bass Soft Step on off 0 1 Table 13. Middle / bass Fc select (6) MSB LSB Function D7 D6 D5 D4 D3 0 0 1 1 0 1 0 1 X X D2 0 1 0 1 D1 D0 0 0 1 1 0 1 0 1 Middle Center Frequency 500Hz 1kHz 1.5kHz 2.5kHz Bass Center Frequency 60Hz 80Hz 100Hz 200Hz Bass DC Mode off on Smoothing Filter off on Not used 25/29 I2C bus specification TDA7418 Table 14. Soft mute and soft step time (12) MSB D7 LSB D6 D5 D4 D3 D2 D1 D0 0 1 0 0 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 X 0 1 0 1 0 1 0 1 0 1 X Table 15. LSB D6 D5 D4 D3 D2 D1 D0 0 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 x 0 1 0 1 1 26/29 Soft Mute on off Soft Mute Time 0.48ms 0.96ms 123ms Soft Step Time 0.16ms 0.32ms 0. 64ms 1.28ms 2.56ms 5.12ms 10.24ms 20.48ms AZ function off on Not used Testing audio processor (13) MSB D7 Function x 0 1 Function Audio Processor Testing Mode off on Test Multiplexer InMuxOutR LoudOutR VolumeOutR VBG1.26 REF5V5 SSCLK SMCLK Clk200kHz Not Used Schlock Normal Fast Mode MUTE Pin Config. MUX output External clock Mute (normal) TDA7418 6 Package information Package information In order to meet environmental requirements, ST (also) offers these devices in ECOPACK® packages. ECOPACK® packages are lead-free. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com. Figure 19. SO20 mechanical data and package dimensions mm inch DIM. MIN. TYP. MAX. MIN. TYP. MAX. A 2.35 2.65 0.093 0.104 A1 0.10 0.30 0.004 0.012 B 0.33 0.51 0.013 0.200 C 0.23 0.32 0.009 0.013 12.60 13.00 0.496 0.512 7.40 7.60 0.291 0.299 D (1) E e 1.27 0.050 H 10.0 10.65 0.394 0.419 h 0.25 0.75 0.010 0.030 L 0.40 1.27 0.016 0.050 k ddd OUTLINE AND MECHANICAL DATA 0˚ (min.), 8˚ (max.) 0.10 0.004 (1) “D” dimension does not include mold flash, protusions or gate burrs. Mold flash, protusions or gate burrs shall not exceed 0.15mm per side. SO20 0016022 D 27/29 Revision history 7 TDA7418 Revision history Table 16. 28/29 Document revision history Date Revision Changes 15-Feb-2007 1 Initial release. 23-Oct-2008 2 Updated Table 6: Subaddress (receive mode) on page 21. 03-Nov-2008 3 Corrected Table 6: Subaddress (receive mode) on page 21. 23-Sep-2013 4 Updated Disclaimer. TDA7418 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party products or services or any intellectual property contained therein. UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. ST PRODUCTS ARE NOT DESIGNED OR AUTHORIZED FOR USE IN: (A) SAFETY CRITICAL APPLICATIONS SUCH AS LIFE SUPPORTING, ACTIVE IMPLANTED DEVICES OR SYSTEMS WITH PRODUCT FUNCTIONAL SAFETY REQUIREMENTS; (B) AERONAUTIC APPLICATIONS; (C) AUTOMOTIVE APPLICATIONS OR ENVIRONMENTS, AND/OR (D) AEROSPACE APPLICATIONS OR ENVIRONMENTS. WHERE ST PRODUCTS ARE NOT DESIGNED FOR SUCH USE, THE PURCHASER SHALL USE PRODUCTS AT PURCHASER’S SOLE RISK, EVEN IF ST HAS BEEN INFORMED IN WRITING OF SUCH USAGE, UNLESS A PRODUCT IS EXPRESSLY DESIGNATED BY ST AS BEING INTENDED FOR “AUTOMOTIVE, AUTOMOTIVE SAFETY OR MEDICAL” INDUSTRY DOMAINS ACCORDING TO ST PRODUCT DESIGN SPECIFICATIONS. PRODUCTS FORMALLY ESCC, QML OR JAN QUALIFIED ARE DEEMED SUITABLE FOR USE IN AEROSPACE BY THE CORRESPONDING GOVERNMENTAL AGENCY. Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any liability of ST. ST and the ST logo are trademarks or registered trademarks of ST in various countries. Information in this document supersedes and replaces all information previously supplied. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners. © 2013 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com 29/29