February 2007 Rev 2 1/34 1 TDA7410ND Signal processor for car radio applications Features ¡ Device Includes Audio Processor, Stereo Decoder And Noiseblanker ¡ No External Components Required ¡ Fully Programmable Via I2C Bus ¡ Softstep Volume and Bass ¡ Low Distortion ¡ Low Noise ¡ SO20 Package Description TDA7410ND is a signal processor specifically designed for car radio applications. The device includes a complete audioprocessor and a stereo decoder with noiseblanker, stereoblend and all signal processing functions for car radio system. Switched-capacitors design technique allows the users to enjoy these features without external components or adjustments. This means higher quality and reliability as well as overall cost saving. The device is fully programmable by I2C bus interface allowing customization of key device parameters, especially filter characteristics.. SO20 Table 1. Device summary Part number Package Packing TDA7410ND SO20 Tube TDA7410NDTR SO20 Tape and reel www.st.com

Contents TDA7410ND 2/34 Contents 1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 Pins description and connection diagram . . . . . . . . . . . . . . . . . . . . . . . 7 2.1 Connection diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 Audio Processor Part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4 Electrical Specification . . . . . ....

TDA7410ND Contents 3/34 6.8 Highcut Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 7 Functional description of the noiseblanker . . . . . . . . . . . . . . . . . . . . . 22 7.1 Trigger path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 7.2 Automatic noise controlled threshold adjustment (ATC) . . . . . . . . . . . . . . 22 7.3 Automatic threshold control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 7.4 Over deviation detector . . . . . . . . . . . . . . . . . ....

List of tables TDA7410ND 4/34 List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Table 2. Pins list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Table 3. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Table 4. Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

TDA7410ND List of figures 5/34 List of figures Figure 1. Block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 2. Connection diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 3. Input Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 4. Soft Step Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

Block diagram TDA7410ND 6/34 1 Block diagram Figure 1. Block diagram Input Multiplexer Volume Bass & Treble OutLR OutLF OutRR OutRF 80kHz LP PLL & Pilot Detector Demodulator & Stereo Blend & Stereo Adjust 25kHz LP S & H High Cut Control Mute Noise Blanker Pulse Generator A D Supply Digital Control I2C Bus CDL CDG CDR Out_LR Out_LF Out_RR Out_RF SCL SDA GND CREF LEVEL VDD MPX AUX_L AUX_R CASS_R CASS_L AM Mute Loudness 8 1 2 6 7 9 15 14 20 5 4 3 11 17 19 16 18 12 13 10

TDA7410ND Pins description and connection diagram 7/34 2 Pins description and connection diagram 2.1 Connection diagram Figure 2. Connection diagram 2.2 Pin description Pin Type: I = input O = Output I/O = Input/Output S = Supply 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 CASS_R 20 CASS_L CDR CDG CDL AUX_R AUX_L AM MPX LEVEL CREF OUT_LF OUT_RF OUT_LR OUT_RR VDD GND SDA SCL MUTE Table 2. Pins list N° Pin # Function Type 1 CASS_R Cassette Input Right I 2 CASS_L Cassette Input Left I 3 CDR CD Right Channel Input I 4 CDG Ground reference CD I 5 CDL CD Left Channel Input I 6 AUX_R Aux Input Right...

Audio Processor Part TDA7410ND 8/34 3 Audio Processor Part Input Multiplexer œ Quasi-differential CD œ Cassette stereo and Aux stereo input œ AM mono and MPX œ Input gain stage with auto zero function Volume Control œ 1dB attenuator œ Max. gain 32dB œ Max. attenuation 79dB œ Softstep function Treble œ 2nd order frequency response œ Fixed center frequency 12.5kHz œ 7x2dB steps Bass Control œ 2nd order frequency response œ Fixed center frequency 100Hz œ DC gain programmable œ 7x 2dB steps œ Softstep function Speaker control œ 4 independent speaker controls (control range 50dB) œ Speaker mute Mute...

TDA7410ND Electrical Specification 9/34 4 Electrical Specification 4.1 Absolute maximum ratings 4.2 Supply 4.3 Electrical characteristics Table 3. Absolute maximum ratings Symbol Parameter Value Unit Rth-j pins Thermal resistance junction-pins 85 °C/W VS Operating supply voltage 10.5 V Tamb Operating ambient temperature -40 to 85 °C Tstg Storage temperature range -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 Table 4. Supply Symbol Parameter Test Condition Min Typ Max Unit VDD Supply voltage...

Electrical Specification TDA7410ND 10/34 GMAX Max gain 32 dB AMAX Max attenuation -83 -79 -75 dB ASTEP Step resolution -0.5 1 1.5 dB EA Attenuation set error G = -20 to +15dB 0 dB G = -79 to -20dB -4 0 3 dB ET Tracking error 2 dB VDC DC steps Adjacent attenuation steps 0.1 3 mV From 0dB to GMIN 0.5 5 mV Bass control Fc Center frequency fC 90 100 110 Hz Q 1.3 1.5 1.7 CRANGE Control range ±13 ±14 ±15 dB ASTEP Step resolution 1 2 3 dB DCGAIN Bass-DC-gain DC = off -1 0 1 dB DC = on 3.5 4.4 5.5 dB Treble control CRANGE Clipping level ±13 ±14 ±15 dB ASTEP Step resolution 1 2 3 dB fc Center frequency...