TDA7416 Car radio signal processor Features ■ 3 stereo inputs ■ 1 pseudo differential stereo input ■ Volume control ■ 7 band equalizer filter control ■ High-pass filter for subwoofer application ■ Direct mute and soft mute ■ 4 independent speaker outputs ■ Soft-step speaker control ■ Subwoofer output with soft step ■ 7 band spectrum analyzer ■ Full mixing capability ■ HPF2 with ZeroCross ■ I2C bus interface '!0'03 TQFP44 Table 1. Device summary Order code Package Packing E-TDA7416 TQFP44 Tray Description The device includes a high performance audio processor with 7 bands equalizer and spectrum analyzer. The digital control allows a programming in a wide range of all the filter characteristics. June 2011 Doc ID 9837 Rev 2 1/37 www.st.com 1 Contents TDA7416 Contents 1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 Pins connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4 3.1 Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.3 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.4 ESD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Description of the audio processor part . . . . . . . . . . . . . . . . . . . . . . . . 13 4.1 Audio processor features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.2 Input stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.3 4.2.1 Pseudo-differential stereo input (IN1) . . . . . . . . . . . . . . . . . . . . . . . . . . 14 4.2.2 Single-ended stereo inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 AutoZero . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.3.1 4.4 2/37 AutoZero remain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Loudness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.4.1 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 4.4.2 Peak frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.4.3 Loudness filter order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.4.4 Flat mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.5 Soft-mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.6 Soft-step volume and speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.7 Equalizer filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.7.1 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.7.2 Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.7.3 Quality Factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.7.4 Superposition of all equalizer filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.7.5 DC-mode of equalizer band 1 (62/100 Hz) . . . . . . . . . . . . . . . . . . . . . . 20 4.8 Subwoofer application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 4.9 Spectrum analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Doc ID 9837 Rev 2 TDA7416 5 Contents 4.10 AC coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.11 Front speaker attenuator and mixing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4.12 Audio processor testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 4.13 Application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 I2C bus interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.1 Interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.1.1 Auto increment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.1.2 Transmitted data (send mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 5.1.3 Reset condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 5.2 Subaddress (receive mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 5.3 Data byte specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 5.3.1 Input selector (0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 5.3.2 Loudness (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 5.3.3 Volume (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 5.3.4 Equalizer (3,4,5,6,7,8,9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 5.3.5 Mixing programming (10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 5.3.6 Soft-mute and HPF2 (11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 5.3.7 Subwoofer configuration / spectrum analyzer / high-pass (12) . . . . . . . 31 5.3.8 Configuration audio processor I (13) . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 5.3.9 Mixer level control (14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 5.3.10 Speaker and subwoofer level control (15,16,17,18,19) . . . . . . . . . . . . . 33 5.3.11 Testing audio processor (20) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 6 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Doc ID 9837 Rev 2 3/37 List of tables TDA7416 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. Table 17. Table 18. 4/37 Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Subaddress (receive mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Input selector (0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Loudness (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Volume (2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Equalizer (3,4,5,6,7,8,9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Mixing programming (10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Soft-mute and HPF2 (11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Subwoofer configuration / spectrum analyzer / high-pass (12). . . . . . . . . . . . . . . . . . . . . . 31 Configuration audio processor I (13) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Mixer level control (14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Speaker and subwoofer level control (15,16,17,18,19) . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Testing audio processor (20) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Doc ID 9837 Rev 2 TDA7416 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. Figure 20. Figure 21. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Pins connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Input stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Loudness attenuation @ fP = 400 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Loudness center frequencies @ Attn. = 15 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 1st and 2nd order loudness @ Attn. = 15 dB, fP = 400 Hz. . . . . . . . . . . . . . . . . . . . . . . . . . 16 Soft-mute timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Soft-step timing for volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Equalizer filter control @ fCenter = 1kHz, Q = 1.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Center frequencies @ Gain = 15dB, Q = 1.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Quality factors @ boost = 15dB, fCenter = 1kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Superposition of all EQ bands @ boost = 15dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 EQ band1, normal- and DC-mode @ boost = 15 dB, fCenter = 62 Hz. . . . . . . . . . . . . . . . 20 Subwoofer application with low-pass @ 80/120/160Hz and high-pass @ 90/135/180Hz . 20 Spectrum analyzer block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Timing spectrum analyzer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 AC/DC coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Output selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 TQFP44 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Doc ID 9837 Rev 2 5/37 6/37 Doc ID 9837 Rev 2 !#)., !#/5437 !#).37 62%&/54 ).054 &ADER SS &ADER SS &ADER -)8 ).2 &ADER &ADER (0& :ERO#ROSS (0& SS3OFT3TEP SS &ADER 3UBWOOFER (0& !#/54, )., BAND%QUALIZER !#).2 SS ,OUDNESS -AIN6OLUME !#/542 ).2 2EAR 3ELECTOR 3!#,+ )., 3!/54 3OFT-UTE -54% ).2 -AIN 3ELECTOR ).'AIN 6$$ #2%& '.$ SS SS &),/2 !#).2 !#/542 &),/, !#)., !#/54, )., )., ).2 ). #,+ 3$! )#"US -IXER -IXER /5422 /54,2 /537 /542& /54,& Figure 1. 0OWER 1 3PECTRUM !NALIZER Block diagram TDA7416 Block diagram Block diagram '!0'03 TDA7416 Pins connection -$2 -$, !-2 !-, .# #REF !#/5437 !#).37 !#/542 .# Pins connection (top view) !58, 62%&/54 0$ 6$$ .# !#)., 0$2 !#/54, -)8 &),/, .# /54,& '.$ /54,2 .# .# /52& /5422 !#)., 0$, !#).2 !#/54 &),/2 !#/54, !582 /5437 !#).2 3!/54 3!). .# -54% .# 3#, Figure 2. 3$! 2 Pins connection '!0'03 Doc ID 9837 Rev 2 7/37 Electrical specifications TDA7416 3 Electrical specifications 3.1 Supply Table 2. Symbol IS Supply current VS = 9 V Ripple rejection @ 1kHz Audio processor (all Filters flat) Min. Typ. Max. Unit 7.5 9 10 V 35 45 55 mA - 60 - dB Thermal data Symbol Rth j-pins Thermal data Description Thermal resistance junction-to-pins Value Unit 65 °C/W Value Unit 10.5 V -40 to 85 °C -55 to +150 °C max Absolute maximum ratings Table 4. Symbol VS 3.4 Test conditions Supply voltage Table 3. 3.3 Parameter VS SVRR 3.2 Supply Absolute maximum ratings Parameter Operating supply voltage Tamb Operating temperature range Tstg Storage temperature range ESD All pins are protected against ESD according to the MIL883 standard. 8/37 Doc ID 9837 Rev 2 TDA7416 3.5 Electrical specifications Electrical characteristics VS = 9 V; Tamb = 25 °C; RL = 10 kΩ; all gains = 0 dB; f = 1 kHz; unless otherwise specified. Table 5. Electrical characteristics Symbol Parameter Test condition Min. Typ. Max. Unit 130 kΩ Input selector Rin Input resistance All single-ended Inputs 70 100 VCL Clipping level - 1.8 2.2 VRMS SIN Input separation - 80 100 dB Min. input gain - -1 0 1 dB GIN MAX Max. input gain - 13 15 17 dB Step resolution - 0.5 1 1.5 dB Adjacent gain steps -5 1 5 mV GMIN to GMAX -10 1 10 mV - 0.5 - mV Differential 70 100 130 kΩ VCM = 1 VRMS @ 1 kHz 46 70 - dB VCM = 1 VRMS @ 10 kHz 46 60 - dB - 11 - µV - -6/-6 - dB GIN MIN GSTEP VDC Voffset DC steps Remaining offset with AutoZero - Differential stereo inputs Rin Input resistance (see Figure 3) CMRR Common mode rejection ratio eNO Output-noise @ speaker-outputs 20Hz - 20kHz, flat; all stages 0dB Mixing control MLEVEL Mixing ratio Main / mix-source GMAX Max. gain - 13 15 17 dB AMAX Max. attenuation - -83 -79 -75 dB ASTEP Attenuation step - 0.5 1 1.5 dB Loudness control ASTEP Step resolution - 0.5 1 1.5 dB AMAX Max. attenuation - -21 -19 -17 dB fP1 180 200 220 Hz fP2 360 400 440 Hz fP3 540 600 660 Hz fP4 720 800 880 Hz fPeak Peak frequency Volume control GMAX Max. gain - 18 20 22 dB AMAX Max. attenuation - -83 -79 -75 dB ASTEP Step resolution - 0 0.5 1 dB Doc ID 9837 Rev 2 9/37 Electrical specifications Table 5. Electrical characteristics (continued) Symbol Parameter EA Attenuation set error ET Tracking error VDC TDA7416 Test condition Min. Typ. Max. Unit G = -20 to +20 dB -0.75 0 +0.75 dB G = -80 to -20 dB -4 0 3 dB - - - 2 dB Adjacent attenuation steps - 0.1 3 mV From 0dB to GMIN - 0.5 5 mV 80 100 - dB T1 - 0.48 1 ms T2 - 0.96 2 ms T3 70 123 170 ms DC steps Soft-mute AMUTE TD Mute attenuation - Delay time 1) - - - 1 V VTH high High threshold for SM - Pin - 2.5 - - V VTH low Low threshold for SM-Pin RPU Internal pull-up resistor - 32 45 58 kΩ VPU Internal pull-up Voltage - - 3.3 - V - +14 +15 +16 dB - 0.5 1 1.5 dB fC1a 55 62 69 Hz fC1b 90 100 110 Hz Equalizer control CRANGE Control range ASTEP Step resolution fC1 Center frequency band 1 fC2 Center frequency band 2 fC2 141 157 173 Hz fC3 Center frequency band 3 fC3 365 396 437 Hz fC4 Center frequency band 4 fC4 0.9 1 1.1 kHz fC5 Center frequency band 5 fC5 2.25 2.51 2.76 kHz 4 4.4 kHz Center frequency band 6 fC6a 3.6 fC6 fC6b 5.70 6.34 6.98 kHz 15 16.5 kHz Center frequency band 7 fC7a 13.5 fC7 fC7b 14.4 16 17.6 kHz Q1 0.9 1 1.1 Q2 1.26 1.4 1.54 Q3 1.62 1.8 1.98 Q4 1.98 2.2 2.44 -1 0 +1 Q Quality factor DC = off DCGAIN 10/37 dB DC-gain, Band 1 DC = on, 15dB boost Doc ID 9837 Rev 2 4 dB TDA7416 Table 5. Electrical specifications Electrical characteristics (continued) Symbol Parameter Test condition Min. Typ. Max. Unit 3.3 V Spectrum analyzer control Output voltage range - 0 fC1 Center frequency band 1 fC1 55 62 69 Hz fC2 Center frequency band 2 fC2 141 157 173 Hz fC3 Center frequency band 3 fC3 356 396 436 Hz fC4 Center frequency band 4 fC4 0.9 1 1.1 kHz fC5 Center frequency band 5 fC5 2.26 2.51 2.76 kHz fC6 Center frequency band 6 fC6 5.70 6.34 6.98 kHz fC7 Center frequency band 7 fC7 14.4 16 17.6 kHz 1.8 1.98 Quality factor Q1 1.62 Q Q2 3.15 3.5 3.85 VSAOut fSAClk Clock frequency - 1 - 100 kHz tSAdel Analog output delay time - 2 - - µs trepeat Spectrum analyzer repeat time - 50 - - ms tintres Internal reset time - - 3 - ms VTH Zero crossing threshold - - ±20 - mV EMAX Max. effect - - 22 - dB EMIN Min. effect - - 4 - dB ESTEP Step resolution - 1.5 2 2.5 dB Input Impedance - 35 50 65 kΩ GMAX Max. gain - 13 15 17 dB AMAX Max. attenuation - -83 -79 -75 dB ASTEP Step resolution - 0.5 1 1.5 dB AMUTE Output mute attenuation - 80 90 - dB Attenuation set error - - - 3 dB VDC DC steps Adjacent Attenuation Steps - 0.5 5 mV MR Mixing ratio Signal/MixIn - 50/50 - % 1.8 2.2 - VRMS HPF2 Speaker attenuators Rin EE Audio outputs VCLIP Clipping level Thd=0.3% RL Output load resistance - 2 - - kΩ CL Output load capacitance - - - 10 nF Output impedance - - 30 120 W ROUT Doc ID 9837 Rev 2 11/37 Electrical specifications Table 5. TDA7416 Electrical characteristics (continued) Symbol Min. Typ. Max. Unit - 4.3 4.5 4.7 V fHP1 81 90 99 Hz fHP2 122 135 148 Hz fHP3 162 180 198 Hz fHP4 194 215 236 Hz Input impedance - 35 50 65 kΩ GMAX Max. gain - 14 15 16 dB AATTN Max. attenuation - -83 -79 -75 dB ASTEP Step resolution - 0.5 1 1.5 dB AMUTE Output mute attenuation - 80 90 - dB - - 2 dB - 1 5 mV fLP1 72 80 88 Hz fLP2 108 120 132 Hz fLP3 144 160 176 Hz 3 15 µV 20 µV µV VDC Parameter DC voltage level Test condition High-pass fHP High-pass corner frequency Subwoofer attenuator Rin EE VDC Attenuation set error DC steps Adjacent Attenuation Steps Subwoofer low-pass fLP Low-pass corner frequency General eNO S/N d SC 12/37 Output noise Signal-to-noise ratio Distortion Channel separation left/right BW = 20 Hz - 20 kHz output muted - BW = 20 Hz - 20 kHz all gains = 0dB single-ended inputs - all gains = 0 dB flat; VO = 2 VRMS - 103 - dB All EQ-bands at +12dB; Q = 1.0 a-weighted; VO = 2.6VRMS - 87 - dB VIN = 1VRMS; all stages 0dB - 0.01 0.1 % VOUT = 1VRMS; Bass & treble = 12dB - 0.05 0.1 % 80 90 - dB - Doc ID 9837 Rev 2 15 TDA7416 Description of the audio processor part 4 Description of the audio processor part 4.1 Audio processor features ● Input multiplexer – ● ● ● ● ● ● ● 1 pseudo differential CDC stereo input, programmable as single-ended input – 3 single-ended stereo inputs – Input gain adjust 0 to 15 dB with 1 dB steps – direct mute – internal offset-cancellation (AutoZero) Mixing stage – mixable mix input to Front speaker outputs – Input controls +15 to -79 dB with 1 dB steps – direct mute – Loudness – programmable center frequency and filter slope – 19 dB with 1dB steps – selectable flat-mode (constant attenuation) Volume – +32 to -79.5 dB with 0.5 dB step resolution – soft-step control with programmable blend times – 100 dB range Equalizer – seven bands – 2nd order frequency response – center frequency programmable for lowest and highest filter – programmable quality factor in four steps for each filter – -15 to 15 dB range with 1dB resolution Spectrum analyzer – seven bandpass filters – 2nd order frequency response – programmable quality factor for different visual appearance – analog output – controlled by external serial clock High-pass – 2nd order butterworth high-pass with programmable cut-off frequency – selectable flat-mode Speaker – 4 independent soft-step speaker controls, +15 to -79 dB with 1 dB steps – mute – 4 independent programmable mix inputs with 50% mixing ratio Subwoofer Doc ID 9837 Rev 2 13/37 Description of the audio processor part – ● TDA7416 single-ended monaural output independent soft-step level control +15 to -79 dB with 1 dB steps Mute functions ● – direct mute – digitally controlled Soft-mute with 3 programmable mute-times Effect – 4.2 Gain effect or high-pass effect fixed external components Input stages In the basic configuration one pseudo-differential, three single-ended stereo are available. Figure 3. Input stages 6REF ). 3TEREO -UTE ). ). ). -AIN3ELECTOR 0SEUDO DIFFERENTIAL ). ). )N'AIN 6REF 6REF 2EAR3ELECTOR -UTE ). ). ). 6REF ). ). &ADER ). 6REF 6REF ). 6REF 4.2.1 '!0'03 Pseudo-differential stereo input (IN1) The IN1- input is implemented as a buffered pseudo-differential stereo stage with 100 kΩ input-impedance at each input pin. This input is also configurable as single-ended stereo input. The common input-pin, IN1- features a fast charge switch to speed up the charge time of external capacitors. This switch is released the first time the input-selector data-byte (0) is accessed. 14/37 Doc ID 9837 Rev 2 TDA7416 4.2.2 Description of the audio processor part Single-ended stereo inputs All single-ended inputs have an input impedance of 100 kΩ. 4.3 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 DATA-BYTE 0 is selected and needs max. 0.3 ms for the alignment. To avoid audible clicks the Audioprocessor have to be muted by soft-mute or hard-mute during this time. 4.3.1 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 selected and an undesired mute would appear at the out-puts. For such applications the TDA7416 could be switched in the AutoZero remain-mode (Bit 6(I1) of the subaddressbyte). If this bit is set to high, the DATABYTE 0 could be loaded without invoking the AutoZero and the old adjustment-value remains. 4.4 Loudness There are four parameters programmable in the loudness stage. 4.4.1 Attenuation Figure 4 shows the attenuation as a function of frequency at fP = 400 Hz Figure 4. Loudness attenuation @ fP = 400 Hz D" + (Z Doc ID 9837 Rev 2 + '!0'03 15/37 Description of the audio processor part 4.4.2 TDA7416 Peak frequency Figure 5 shows the four possible peak-frequencies at 200, 400, 600 and 800Hz Figure 5. Loudness center frequencies @ Attn. = 15 dB D" + + (Z 4.4.3 '!0'03 Loudness filter order Different shapes of 1st and 2nd-order loudness Figure 6. 1st and 2nd order loudness @ Attn. = 15 dB, fP = 400 Hz D" 4.4.4 (Z + Flat mode In flat mode the loudness stage works as a 0dB to -19dB attenuator. 16/37 Doc ID 9837 Rev 2 + '!0'03 TDA7416 4.5 Description of the audio processor part Soft-mute The digitally controlled soft-mute stage allows muting/demuting the signal with a I2C bus programmable slope. The mute process can either be activated by the soft-mute 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 de-muting. Figure 7. Soft-mute timing '!0'03 1. Please notice that a started Mute-action is always terminated and could not be interrupted by a change of the mute -signal. 4.6 Soft-step volume and speaker When the speaker-level is changed audible clicks could appear at the output. The root cause of those clicks could either be a DC-Offset before the speaker-stage or the sudden change of the envelope of the audio signal. With the soft-step feature both kinds of clicks could be reduced to a minimum and are no more audible. The blend-time from one step to the next is programmable in four steps. Figure 8. Soft-step timing for volume D" D" 334IME D" D" '!0'03 1. For steps more than 0.5dB (Volume) or 1dB (Speaker) the soft-step mode should be deactivated because it could generate a hard 1dB step during blending. Doc ID 9837 Rev 2 17/37 Description of the audio processor part 4.7 TDA7416 Equalizer filter There are three parameters programmable in the equalizer filter: 4.7.1 Attenuation Figure 9 shows the boost and cut response as a function of frequency at a center frequency of 1kHz. Figure 9. Equalizer filter control @ fCenter = 1kHz, Q = 1.0 D" K K K (Z 4.7.2 '!0'03 Center frequency This parameter is programmable in the filter stage 1(62/100Hz), 6(4/6.34kHz) and 7(15/16kHz) only. Figure 10 shows the center frequencies 62, 156, 396, 1000, 2510, 6340 and 15000 Hz of the 7 equalizer filters. Figure 10. Center frequencies @ Gain = 15dB, Q = 1.0 D" 18/37 (Z Doc ID 9837 Rev 2 K K '!0'03 TDA7416 4.7.3 Description of the audio processor part Quality Factors Figure 11 shows the four possible quality factors 1, 1.4, 1.8 and 2.2 Figure 11. Quality factors @ boost = 15dB, fCenter = 1kHz D" K K (Z '!0'03 4.7.4 Superposition of all equalizer filters Figure 12 shows the superposition of all equalizer filter curves for different quality factors. The gain for all filters is +15dB. Figure 12. Superposition of all EQ bands @ boost = 15dB D" (Z Doc ID 9837 Rev 2 K K '!0'03 19/37 Description of the audio processor part 4.7.5 TDA7416 DC-mode of equalizer band 1 (62/100 Hz) In this mode, the DC-gain 4dB when set to 15dB boost. Figure 13. EQ band1, normal- and DC-mode @ boost = 15 dB, fCenter = 62 Hz D" + + (Z '!0'03 1. The center frequency, Q, DC-mode and boost/cut can be set fully independently for each filter. 4.8 Subwoofer application Figure 14. Subwoofer application with low-pass @ 80/120/160Hz and high-pass @ 90/135/180Hz D" (Z + + '!0'03 Both filters, the low-pass as well as the high-pass filter, have butterworth characteristic so that their cut-off frequencies are not equal but shifted by the factor 1.125 to get a flat frequency response. 20/37 Doc ID 9837 Rev 2 TDA7416 4.9 Description of the audio processor part Spectrum analyzer A fully integrated seven band spectrum analyzer with programmable quality factor is present in the TDA7416 (Figure 15). The spectrum analyzer consists of seven band pass filters with rectifier and sample capacitor which stores the maximum peak signal level since the last read cycle. This peak signal level can be read by a microprocessor at the SAout-pin. To allow easy interfacing to an analog port of the microprocessor, the output voltage at this pin is referred to device ground. The microprocessor starts a read cycle with the negative going clock edge at the SAclk input. On the following positive clock edges, the peak signal level for the band pass filters is subsequently switched to SAout. Each analog output data is valid after the time tSAdel. A reset of the sample capacitors is induced whenever SAclk remains high for the time tintres. Note that a proper reset requires the clock signal SAclk to be held at high potential. Figure 15 shows the block diagram and Figure 16 illustrates the read cycle timing of the spectrum analyzer. Figure 15. Spectrum analyzer block diagram '!0'03 Figure 16. Timing spectrum analyzer '!0'03 Doc ID 9837 Rev 2 21/37 Description of the audio processor part 4.10 TDA7416 AC coupling In some applications additional signal manipulations are desired. For this purpose an ACcoupling is placed before the speaker (fader)-attenuators, which can be activated or internally shorted by I2C bus. In short condition the input-signal of the speaker-attenuator is available at the AC-outputs. The input-impedance of this AC-inputs is 50k. In addition there are Mix inputs available. With this inputs it is possible to mix an external signal to every speaker with a mixing ratio of 50% (seeFigure 16). The source of front and rear speaker can be set independently. As source is choosable: internal dc coupling (not recommended) external ac coupling using ACin pins !#OUT, 37OUT Figure 17. AC/DC coupling 37IN 6REF !#IN, 6REF &RONT&ADER LEFTCHANNEL (IGHPASS FR FLAT 2EAR&ADER 3UBWOOFER &ADER ,OWPASS FR FLAT RIGHTCHANNEL 2EARSELECTOR '!0'03 4.11 Front speaker attenuator and mixing A Mixing-stage is placed after front speaker-attenuator and can be set independently to mixing-mode. Having a full volume for the Mix-signal the stage offers a wide flexibility to adapt the mixing levels. Figure 18. Output selector 6OLUME D" D"STEP (IGHPASS /UT& K K &RONT &ROM-) 8IN 6OLUME D" D"STEP '!0'03 22/37 Doc ID 9837 Rev 2 TDA7416 4.12 Description of the audio processor part Audio processor testing During the test mode, which can be activated by setting bit I2 of the subaddress byte and D0 of the audioprocessor testing byte, several internal signals are available at the Mix pin. During this mode the input resistance of 100 kOhm is disconnected from the pin. The internal signals available are shown in the Data-byte specification. Application diagram ). 2 )., )., !#OUT2 !#OUT37 )., ).2 )., ).2 )., Figure 19. Application diagram !#)N, !#/UT, !#OUT, 62%&OUT 63 3$! 3#, 3!#,+ 3-UTE 3!/UT 37/UT &) ,/2 !#/UT2 !#)N2 &),/, /UT,& /UT,2 -)8 ).2 4.13 /UT22 /UT2& '!0'03 Doc ID 9837 Rev 2 23/37 I2C bus interface TDA7416 5 I2C bus interface 5.1 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) Figure 20. Interface protocol #()0!$$2%33 35"!$$2%33 -3" ,3" 3 27 !#+ -3" 4 !: ) ! ! ! $!4!$!4!N ! ,3" -3" ! !#+ ,3" $!4! !#+ 0 '!0'03 S = Start R/W = “0” -> Receive-Mode (Chip could be programmed by µP) “1” -> Transmission-Mode (Data could be received by µP) ACK = Acknowledge P = Stop Max clock speed 500kbits/s 5.1.1 Auto increment If bit I in the subaddress byte is set to “1”, the auto increment of the subaddress is enabled. 5.1.2 Transmitted data (send mode) MSB X LSB X X X X X SM = Soft-mute activated X = Not Used The transmitted data is automatically updated after each ACK. Transmission can be repeated without new chip address. 24/37 Doc ID 9837 Rev 2 X SM TDA7416 I2C bus interface 5.1.3 Reset condition A power-on-reset is invoked if the supply voltage is below than 3.5V. After that, the following data is written automatically into the registers of all subaddresses: MSB LSB 1 1 1 1 1 1 1 0 The programming after POR is marked bold-face / underlined in the programming tables. With this programming all the outputs are muted to VREF (VOUT = VDD/2). 5.2 Subaddress (receive mode) Table 6. Subaddress (receive mode) 1MSB I2 LSB I1 I0 A4 A3 A2 A1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 0 0 0 0 1 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 Function A0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 Audio processor Testmode off on AutoZero remain off on Auto-increment mode off on Subaddress Source Selector Loudness Volume EQ Filter 1 (62/100Hz) EQ Filter 2 (157Hz) EQ Filter 3 (396Hz) EQ Filter 4 (1kHz) EQ Filter 5 (2.51kHz) EQ Filter 6 (4/6.34kHz) EQ Filter 7 (15/16kHz) Mixing Programming Soft-mute Subwoofer / Spectrum analyzer / High-pass Configuration Audio processor I Mixing Level Control Speaker attenuator LF Speaker attenuator RF Speaker attenuator LR Speaker attenuator RR Subwoofer attenuator Testing Audio processor Doc ID 9837 Rev 2 25/37 I2C bus interface 5.3 TDA7416 Data byte specification The status after power-on-reset is marked bold-face / underlined in the programming tables. 5.3.1 Input selector (0) Table 7. Input selector (0) MSB D7 LSB D6 D5 D4 D3 D2 X X X X 0 0 : 1 1 0 0 : 1 1 0 0 : 1 1 D1 0 0 1 1 0 1 0 1 0 1 : 0 1 0 1 5.3.2 Loudness (1) Table 8. Loudness (1) MSB D7 26/37 Source selector BUS/PD AUX MD AM/FM Input gain 0dB 1dB : 14dB 15dB Mute off on LSB D6 0 0 1 1 0 1 Function D0 D5 0 1 0 1 D4 D3 D2 D1 D0 0 0 : 0 0 : 1 : 0 0 : 1 1 : 0 : 0 0 : 1 1 : 0 : 0 0 : 1 1 : 1 : 0 1 : 0 1 : 1 : Function Attenuation 0 dB -1 dB : -14 dB -15 dB : -19 dB not allowed Center frequency 200Hz 400Hz 600Hz 800Hz Loudness order First order Second order Doc ID 9837 Rev 2 TDA7416 I2C bus interface 5.3.3 Volume (2) Table 9. Volume (2) MSB LSB Function D7 0 0 : 0 0 0 : 0 0 0 : 1 1 Note: D6 0 0 : 0 0 0 : 0 1 1 : 1 1 D5 0 0 : 0 0 0 : 1 0 0 : X X D4 0 0 : 1 1 1 : 1 0 0 : 1 1 D3 0 0 : 1 1 1 : 1 0 0 : 1 1 D2 0 0 : 0 0 0 : 1 0 0 : 1 1 D1 0 0 : 0 0 1 : 1 0 0 : 1 1 D0 0 1 : 0 1 0 : 1 0 1 : 0 1 Gain/Attenuation (+32.0dB) (+31.5dB) : +20.0dB +19.5dB +19.0dB : +0.5dB 0.0dB -0.5dB : -79.0dB -79.5dB 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. Doc ID 9837 Rev 2 27/37 I2C bus interface TDA7416 5.3.4 Equalizer (3,4,5,6,7,8,9) Table 10. Equalizer (3,4,5,6,7,8,9) MSB LSB Function D7 D6 0 0 1 1 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 Equalizer cut/boost level -15dB -14dB : -1dB 0dB 0dB +1dB : +14dB +15dB Equalizer Q-Factor 2.2 1.8 1.4 1.0 0 1 Equalizer center frequency (only Subaddresses 3,8,9) 62Hz(addr 3)/4kHz(addr 8)/15kHz(addr 9) 100Hz(addr 3)/6.24kHz(addr 8)/16kHz(addr 9) 0 1 DC mode EQ Band 1 (62/100 Hz, Subaddress. 4!) on off 28/37 Doc ID 9837 Rev 2 TDA7416 I2C bus interface 5.3.5 Mixing programming (10) Table 11. Mixing programming (10) MSB LSB Function D7 D6 D5 D4 D3 D2 D1 D0 0 1 0 0 1 1 0 1 0 1 0 1 0 1 X X 0 1 0 1 Mixing Mute enable Rear Source Selector BUS’(PD) AUX MD AM/FM Mixing Target Speaker LF off Speaker LF on Speaker RF off Speaker RF on ZeroCross on HPF2 on off Spectrum Analyzer Detect Point After EQ Before EQ Doc ID 9837 Rev 2 29/37 I2C bus interface TDA7416 5.3.6 Soft-mute and HPF2 (11) Table 12. Soft-mute and HPF2 (11) MSB LSB Function D7 D6 D5 D4 D3 D2 D1 D0 0 1 0 0 1 0 1 0 0 0 0 0 0 0 0 1 1 1 Note: 30/37 0 0 0 0 1 1 1 1 X X X 0 0 1 1 0 0 1 1 X 0 1 0 1 0 1 0 1 0 1 0 1 1 0 1 X Soft-mute On (Mute) Off Soft-mute time Mute time = 0.48ms Mute time = 0.96ms Mute time = 123ms Secondary high-pass enable Filter available No Filter (Gain) Secondary high-pass effect (with ZeroCross) 4 dB 6 dB 8 dB 10 dB 12 dB 14 dB 16 dB 18dB 20dB 22dB 0dB It is recommended to set D3(Filter available or not) during initial mute. Doc ID 9837 Rev 2 TDA7416 I2C bus interface 5.3.7 Subwoofer configuration / spectrum analyzer / high-pass (12) Table 13. Subwoofer configuration / spectrum analyzer / high-pass (12) MSB LSB Function D7 D6 D5 D4 D3 X X 0 1 0 1 0 0 1 1 0 1 0 1 D2 0 1 D1 D0 0 0 1 1 0 1 0 1 Subwoofer Filter off 80Hz 120Hz 160Hz Subwoofer Coupling AC using SWIn pin DC Spectrum Analyzer Q-Factor 3.5 1.8 High-pass enable Filter off Filter on High-pass cut-off frequency 90Hz 135Hz 180Hz 225Hz Doc ID 9837 Rev 2 31/37 I2C bus interface TDA7416 5.3.8 Configuration audio processor I (13) Table 14. Configuration audio processor I (13) MSB LSB Function D7 D6 D5 D4 D3 D2 D1 D0 0 1 0 1 0 1 0 0 1 1 0 1 0 1 0 1 32/37 0 1 0 1 PD input mode single ended pseudo differential PD Input Gain -6 dB 0 dB Soft-step volume off on Soft-step time 320µs 1.28ms 5.12ms 20.4ms Loudness flat filter ON Front AC speaker AC coupling (ACin) DC coupling Rear effect No effect signal Equalizing signal Doc ID 9837 Rev 2 TDA7416 I2C bus interface 5.3.9 Mixer level control (14) Table 15. Mixer level control (14) MSB LSB Function D7 D6 D5 D4 D3 D2 D1 D0 1 0 : 0 0 0 0 : 0 0 : 1 1 1 0 : 0 0 0 0 : 0 0 : 0 0 1 0 : 0 0 0 0 : 0 1 : 0 0 X 1 : 0 0 0 0 : 1 0 : 1 1 X 1 : 0 0 0 0 : 1 0 : 1 1 X 1 : 0 0 0 0 : 1 0 : 1 1 X 1 : 1 0 0 1 : 1 0 : 0 1 X 1 1 0 0 : 0 0 : 0 0 X Gain/Attenuation +15dB : + 1dB 0dB 0dB - 1dB : -15dB -16dB : -78dB -79dB Mute 5.3.10 Speaker and subwoofer level control (15,16,17,18,19) Table 16. Speaker and subwoofer level control (15,16,17,18,19) ) MSB LSB Function D7 0 1 D6 D5 D4 D3 D2 D1 D0 0 : 0 0 0 0 : 0 : 0 : 1 : 1 : 1 1 0 : 0 0 0 0 : 1 : 1 : 0 : 0 : 0 1 0 : 0 0 1 1 : 0 : 1 : 0 : 1 : 1 X 1 : 0 0 0 0 : 0 : 0 : 0 : 0 : 1 X 1 : 0 0 0 0 : 0 : 0 : 0 : 0 : 1 X 1 : 0 0 0 0 : 0 : 0 : 0 : 0 : 1 X 1 : 1 0 0 1 : 0 : 0 : 0 : 0 : 1 X Gain/Attenuation +15dB : + 1dB 0dB 0dB - 1dB : -16dB : -32dB : -48dB : -64dB -79dB Mute Soft-step on/off On Off Doc ID 9837 Rev 2 33/37 I2C bus interface TDA7416 5.3.11 Testing audio processor (20) Table 17. Testing audio processor (20) MSB LSB Function D7 D6 D5 D4 D3 D2 D1 D0 0 1 0 1 0 1 0 1 X 0 1 X X X 0 1 0 1 0 1 Note: 34/37 0 0 0 0 0 0 0 1 1 1 1 1 0 0 0 0 1 1 1 0 0 0 1 1 0 0 1 1 0 0 1 0 0 1 0 1 Audio processor test-mode off on Test-multiplexer Spectrum Analyzer Filter 62Hz Spectrum Analyzer Filter 157Hz Spectrum Analyzer Filter 396Hz Spectrum Analyzer Filter 1kHz Spectrum Analyzer Filter 2.51kHz Spectrum Analyzer Filter 6.34kHz Spectrum Analyzer Filter 16kHz Switch-Ron measurement setup (Level input) not used 200kHz Oscillator NB-Hold internal reference Clock external internal AZ function off on SC-Clock Fast mode Normal mode This byte is used for testing or evaluation purposes only and must not set to other values than “11111110” in the application! Doc ID 9837 Rev 2 TDA7416 Package information In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. Figure 21. TQFP44 mechanical data and package dimensions MM INCH $)- -). 490 ! -!8 -). 490 ! ! " # $ $ $ % % % E , , K /54,).%!.$ -%#(!.)#!,$!4 ! -!8 41&0XXMM MIN TYP MAX $ $ ! ! ! MM " % % 3EATING0LANE " # E , 6 Package information + 41&0 $ '!0'03 Doc ID 9837 Rev 2 35/37 Revision history 7 TDA7416 Revision history Table 18. 36/37 Document revision history Date Revision Changes 20-Sep-2003 1 Initial release. 30-Jun-2011 2 Document reformatted. Updated order code in the Table 1: Device summary on page 1. Doc ID 9837 Rev 2 TDA7416 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. 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