TDA7411TR

TDA7411 ADVANCED CAR SIGNAL PROCESSOR ■ FULLY INTEGRATED SIGNAL PROCESSOR OPTIMIZED FOR CAR RADIO APPLICATIONS ■ FULY PROGRAMMABLE BY I2C BUS INCLUDES AUDIOPROCESSOR, STEREODECODER WITH NOISE BLAMKER AND MULTIPATH DETECTOR SOFTMUTE FUNCTION PROGRAMMABLE ROLL-OFF COMPENSATION NO EXTERNAL COMPONENTS ■ ■ ■ ■ TQFP44 ORDERING NUMBER: TDA7411 c u d DESCRIPTION The TDA7411 is the successor of the TDA7407 in the CSP family introduced by the TDA7460/61. It uses the same innovative concepts and design technologies allowing fully software programmability through I2C bus and overall cost optimization for the system designer. ) s ( ct o r P es and absence of external components for filter settings, a last generation stereo decoder with multi path detector and a sophisticated stereo blend, high cut control and noise cancellation circuitry. e t le o s b O - The device includes a three band audio processor with extended configurable input and output stagBLOCK DIAGRAM ) s t( Strength points of the CSP approach are flexibility and overall cost/room saving in the application, combined with high performances. u d o r P e t e l o s b O October 2003 1/43 TDA7411 ABSOLUTE MAXIMUM RATINGS Symbol VS Parameter Value Unit 10.5 V Operating Supply Voltage Tamb Operating Ambient Temperature Range -40 to 85 °C Tstg Operating Storage Temperature Range -55 to 150 °C SUPPLY Symbol Parameter Test Condition Min. Typ. Max. Unit 7.5 8 10 V VS Supply Voltage IS Supply Current VS = 9V 45 mA Ripple Rejection @ 1KHz Audioprocessor (all filters flat) 60 dB Stereodecoder + Audioprocessor 55 dB SVRR ESD All pins are protected against ESD according to the MIL883 standard. c u d AUXL 1 AUXC 2 AUXR 3 CDCHR+ 4 CDCHR- 5 CDCHL- 6 CDL CDR MDR MDL Cref SubL SubR ACoutR ACoutL ACin0L ACin0R PIN CONNECTION (Top view) 44 43 42 41 40 39 38 37 36 35 34 (s) b O - o r P 33 ACin1R 32 ACin1L 31 ACin2L 30 ACin2R 29 ACin3R 28 ACin3L 27 VS 26 GND 23 OutRR Level 12 13 14 15 16 17 18 19 20 21 22 OutLR 11 FreeL OutRF MPX SCL 24 FreeR OutLF 10 SDA 25 AM AFS NV- 9 Mute 8 Qual NV+ Mpin 7 MPout CDCHL+ r P e s b O so ct u d o t e l o e t le ) s t( PINCON-TDA7411 THERMAL DATA Symbol Rth-j pins 2/43 Parameter Thermal Resistance Junction to pins Max Value Unit 85 °C/W TDA7411 PIN DESCRIPTION Nr. Name 1 AUXL Quasi Differential Input Left Function Type I 2 AUXC Quasi Differential Input Common I 3 AUXR Quasi Differential Input Right I 4 CDCHR+ Full Differential Input Right Plus I 5 CDCHR- Full Differential Input Right Minus (not used in quasi differential mode) I 6 CDCHL- Full Differential Input Left Minus (CDCHCom in Qdiff mode) I 7 CDCHL+ Full Differential Input Left Plus I 8 NV+ Mono Differential Input Plus I 9 NV- Mono Differential Input Minus I 10 AM AM Input I 11 MPX FM Stereo Decoder Input I 12 Level Level Input Stereo Decoder I 13 MPin Multi Path Input I 14 MPout 15 Qual Multi Path Output Stereo Decoder Quality Output 16 AFS Alternative Frequency Search Drive ) s t( O od uc O I 17 Mute Soft Mute Drive 18 SDA I2C Data Line 19 SCL I2C Clock Line 20 FreeR Free Right Speaker Output 21 FreeL Free Left Speaker Output 22 OutLR Rear Left Speaker Output 23 OutRR Rear Right Speaker Output 24 OutRF Front Right Speaker Output 25 OutLF Front Left Speaker Output 26 GND Supply Ground 27 VS Supply Voltage 28 ACin3L Pre-speaker Input Three Left 29 ACin3R Pre-speaker Input Three Right I 30 ACin2R Pre-speaker Input Two Right I 31 ACin2L Pre-speaker Input Two Left I 32 ACin1L Pre-speaker Input Three Left I ACin1R Pre-speaker Input Three Right I ACin0R Pre-speaker Input Zero Right I ACin0L Pre-speaker Input Zero Left I 34 35 s b O 36 so b O - u d o r P e t e l o 33 ) s ( ct r P e t le I I/O I O O O O O O S S I ACoutL Pre-speaker Output Left O 37 ACoutR Pre-speaker Output Right O 38 SubR Sub Channel Selector Output Right O 39 SubL Sub Channel Selector Output Left O 40 Cref Reference Capacitor Pin O 41 MDL Mini Disk Input Left I 42 MDR Mini Disk Input Right I 43 CDR Compact Disk Input Right (Test mode Output) I 44 CDL Compact Disk Input Left I Pin type legenda: I = Input ; O = Output; I/O = Input/Output; S = Supply; nc = not connected. 3/43 TDA7411 AUDIO PROCESSOR PART Input Multiplexer – – – – – – – full differential stereo input configurable as quasi-differential input quasi differential auxiliary stereo input mini disk stereo input configurable as mono differential input compact disk stereo input mono differential navigation input AM mono input second multiplexer for sub channel output Volume control – 1dB attenuator – Max. gain 15dB – Max. attenuation 79dB Bass Control – – – – 2nd order frequency response Center frequency programmable in 4(5) steps DC gain programmable ±15 x 1dB steps c u d Mid Control – – – – 2nd order frequency response Center frequency programmable in 4 steps Q-factor programmable in 2 steps ±15 x 1dB steps Treble Control ) s ( ct – 2nd order frequency response – Center frequency programmable in 4 steps – ±15 x 1dB steps o s b O - u d o r P e Speaker Control – – – – – e t le o r P 6 independent speaker controls in 1dB steps max. gain 15dB max. attenuation 79dB implemented soft mute capability speaker input multiplexer s b O t e l o Mute Functions – independent direct fast mute controlled by I2C interface – independent soft mute for Front L/R, Rear and Free controlled by I2C interface – digitally controlled soft mute with 4 programmable mute-times – pin controlled soft mute soft mute monitor function @ Mute pin 4/43 ) s t( TDA7411 ELECTRICAL CHARACTERISTICS (VS = 8V; Tamb = 25°C; RL = 10KΩ; all gains = 0dB; f = 1KHz; unless otherwise specified) Symbol Parameter Test Condition Min. Typ. Max. Unit 100 130 KΩ INPUT SELECTOR Rin Input Resistance all inputs except Phone 70 VCL Clipping Level THD < 0.3% 1.6 1.7 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 VDC DC Steps 0.5 1 1.5 dB Adjacent Gain Step -5 0.5 5 mV GMIN to GMAX -10 5 10 mV Differential 70 100 130 KΩ Common Mode 70 100 130 KΩ VCM = 1VRMS @ 1KHz 45 70 VCM = 1VRMS @ 10KHz 45 60 FULL AND QUASI DIFFERENTIAL STEREO INPUT Rin Input Resistance (see Figure 1) CMRR Common Mode Rejection Ratio eN Output Noise @ Speaker Outputs 20Hz to 20KHz flat; all stages 0dB CMRR Input Resistance Differential Common Mode Rejection Ratio VCM = 1VRMS @ 1KHz VCM = 1VRMS @ 10KHz P e let GMAX Max Gain AMAX Max Attenuation ASTEP Step Resolution EA so Attenuation Set Error DC Steps VDC o r P e SOFT MUTE/AFS AMUTE TD Mute Attenuation du t e l o s b O KΩ 70 dB 40 60 dB 14 15 74 79 16 dB dB 0.5 1 1.5 -1.25 0 +1.25 dB G = -60 to +20dB -4 0 +3 dB dB 2 dB Adjacent Attenuation Steps 0.1 3 mV From 0dB to GMIN 0.5 5 mV 80 Delay Time 56 µV G = -20 to +20dB ) s ( ct Tracking Error ET b O - 40 15 d o r 40 VOLUME CONTROL uc 9 MONO DIFFERENTIAL INPUT (NV and MD in differential mode) Rin ) s t( dB dB 100 dB T1 0.24 ms T2 0.48 ms T3 10.1 ms T4 20.2 ms 1 1 V VTH low Low Threshold for Mute/AFS-Pin VTH high High Threshold for SM -Pin 1.8 V VTH high High Threshold for AFS -Pin 2.4 V VSMon Monitor Voltage for SMon 2.4 V RPD Internal Pull-up Resistor 100 KΩ BASS CONTROL CRANGE ASTEP Control Range ±13 ±15 ±17 dB Step Resolution 0.5 1 1.5 dB 5/43 TDA7411 ELECTRICAL CHARACTERISTICS (continued) (VS = 8V; Tamb = 25°C; RL = 10KΩ; all gains = 0dB; f = 1KHz; unless otherwise specified) Symbol fC Parameter Test Condition Center Frequency QBASS DCGAIN Quality Factor Bass-DC-Gain Min. Typ. Max. Unit fC1 54 60 66 Hz fC2 63 70 77 Hz fC3 72 80 88 Hz fC4 90 100 (150)(2) 110 Hz 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 DC = off -1 0 1 dB DC = on 3.5 4.4 5.5 dB Control Range ±13 ±15 ±17 dB Step Resolution 0.5 1 1.5 dB 500 MID CONTROL CRANGE ASTEP fC Center Frequency fC1 450 fC2 0.9 fC3 1.35 QBASS Quality Factor Q2 TREBLE CONTROL GMAX Control Range ASTEP Step Resolution fC Center Frequency fC1 (s) fC2 SPEAKER ATTENUATORS u d o Rin Impedance @ACin0,2,3 Rin Impedance @ACin1 GMAX kHz kHz 0.9 1 1.1 1.8 2 2.2 ±13 ±15 ±17 dB 0.5 1 1.5 dB 8 10 12 KHz 10 12.5 15 KHz fC3 12 15 18 KHz fC4 14 17.5 21 KHz 35 50 65 kΩ Rin1 35 50 65 kΩ Rin2 28 40 52 kΩ Rin3 21 30 39 kΩ Max. Gain 13 15 17 dB 1.5 dB ±2 dB 5 mV Max. Attenuation -74 -79 Step Resolution 0.5 1 AMUTE Output Mute Attenuation 80 90 EE VDC kHz 2.2 ASTEP AMAX O r P e t e l o bs ct o s b O - Hz 1.1 1.65 P e let Q1 1.5 550 2 1.8 fC4 uc d o r 1 ) s t( Attenuation Set Error DC Steps Adjacent Attenuation Steps -5 0.1 d = 0.3% 1.6 1.8 dB dB AUDIO OUTPUTS VCLIP Clipping Level RL Output Load Resistance CL Output Load Capacitance 6/43 VRMS 2 kΩ 10 nF TDA7411 ELECTRICAL CHARACTERISTICS (continued) (VS = 8V; Tamb = 25°C; RL = 10KΩ; all gains = 0dB; f = 1KHz; unless otherwise specified) Symbol Parameter ROUT Output Impedance VDC DC Voltage Level Test Condition Min. 3.8 Typ. Max. Unit 30 120 Ω 4 4.2 V 3 6.5 10 15 µV µV GENERAL Output Noise eNO BW = 20Hz - 20kHz output muted all gains = 0dB 6.5 S/N d Signal to Noise Ratio 102 110 dB bass, treble at +12dB; a-weighted; VO = 2.6VRMS 96 100 dB all stages 0dB Mono Diff Inputs, Vout = 0.75VRMS All other inputs, Vout = 1VRMS Distortion VOUT=1VRMS ; Bass & Treble = 12dB SC Channel Separation L/R ET Total Tracking Error 0.04 0.1 0.05 0.15 80 100 AV = 0 to -20dB -1 0 AV = -20 to -60dB -2 0 3 P e let BUS INPUTS VIL Input Low Voltage VIH Input High Voltage IIN Input Current VIN = 0.4V VO Output Voltage SDA Acknowledge VO = 1.6mA ) s t( uc 1 2 0.8 2.5 1) The SM and AFS pin are active low (Mute = 0) 2) See description of Audio processor Part section 1.8. ) s ( ct b O - so -5 % % dB d o r Internal POR Voltage VPOR µV all gains = 0dB;flat; VO = 2VRMS dB dB V V V 5 µA 0.4 V u d o r P e t e l o s b O 7/43 TDA7411 DESCRIPTION OF THE AUDIOPROCESSOR PART Input Multiplexer – CDCH full differential input configurable as quasi-differential input – auxiliary quasi-differential input – CD stereo – MD stereo configurable as mono-differential phone input – mono-differential NV input – AM mono – and stereo decoder input. Figure 1. Input Selectors TDA7411 c u d e t le ) s ( ct u d o r P e t e l o s b O 8/43 o s b O - o r P ) s t( TDA7411 Input stages In the basic configuration one full differential, one quasi-differential, two single ended stereo, one monodifferential and two tuner (AM and MPX) inputs are available. In addition the ac coupling input Acin0 can be used as single ended input for the input multiplexer. The full-differential input can be switched into quasi-differential mode (see Fig. 2) and the MD single ended input can be used as mono-differential input (see Fig.1). Figure 2. Full differential input c u d e t le ) s ( ct AutoZero ) s t( o r P o s b O - In order to reduce the number of pins there is no AC coupling between the In-Gain and the following stage, so that any offset generated by or before the In-Gain-stage would be transferred or even amplified to the output. To avoid that effect a special Offset-cancellation-stage called AutoZero is implemented. This stage is located after the In-Gain-stage to eliminate all offsets generated by the stereo decoder, the Input-Stages and the In-Gain (Please notice that externally generated offsets, e.g. generated through the leakage current of the coupling capacitors, are not canceled). u d o r P e The auto-zeroing is started every time the DATA-BYTE 0 is selected and takes a time of max. 0.3ms. To avoid audible clicks the audio processor is muted before the tone control stage during this time. t e l o s b O AutoZero-Remain In some cases, for example if the µP is executing a refresh cycle of the IIC-Bus-programming, it is not useful to start a new AutoZero action because no new source is selected and an undesired mute would appear at the outputs. For such applications the TDA7411 could be switched in the AutoZero-RemainMode (Bit 6 of the sub address byte). If this bit is set to high, the DATABYTE 0 could be loaded without invoking the AutoZero and the old adjustment-value remains. Sub Channel Multiplexer All input stages are available as source in the sub channel multiplexer. The selected source is buffered and available at the pins SubR, SubL. 9/43 TDA7411 Mute Capability of Audio Processor The main channel and the sub channel of the TDA7411 can be muted after the Source selectors. This mute (no soft mute!) must be started by I2C bus. The digitally controlled SoftMute stages are placed in the speaker and allow muting/demuting of the signal with an I2C-bus programmable slope. The mute process can either be activated by the SoftMute pin or by the I2C-bus. The slope is realized in a special S-shaped curve to mute slowly in the critical regions (see Figure 3). Figure 3. Soft mute-Timing c u d e t le o s b O - ) s t( o r P Note: Please notice that a started Mute-action is always terminated and could not be interrupted by a change of the mute -signal. Using the IIC bus control the soft mute can be activated independently for FrontL, FrontR, Rear and Free. For timing purposes the Bit 3 of the I2C-bus output register is set to 1 as soon as the soft mute of any speaker is started until the end of demuting of all speakers. The Mute pin is able to work as monitor for the same signal. The standard function of the pin is not influenced by the monitor function. ) s ( ct u d o r P e t e l o s b O 10/43 TDA7411 Bass There are four parameters programmable in the bass stage: Attenuation Figure 4 shows the attenuation as a function of frequency at a center frequency of 80Hz. Figure 4. Bass Control @ fC = 80Hz, Q = 1 15.0 10.0 5.0 0.0 c u d -5.0 -10.0 -15.0 10.0 100.0 Center Frequency 1.0K o s b O - e t le ) s t( o r P 10.0K Figure 5 shows the four possible center frequencies 60, 70, 80 and 100Hz. ) s ( ct Figure 5. u d o 15.0 r P e 12.5 t e l o 10.0 s b O 7.5 5.0 2.5 0.0 10.0 100.0 1.0K 10.0K 11/43 TDA7411 Quality Factors Figure 6 shows the four possible quality factors 1, 1.25, 1.5 and 2. Figure 6. Bass Quality factors @ Gain = 14dB, fC = 80Hz 15.0 12.5 10.0 7.5 5.0 2.5 c u d 0.0 10.0 100.0 1.0K ) s t( o r P 10.0K e t le DC Mode o s b O - In this mode the DC-gain is increased by 5.1dB. 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 7. Bass normal and DC Mode @ Gain = 14dB, fC = 80Hz ) s ( ct 15.0 u d o 12.5 r P e 10.0 t e l o 7.5 bs O 5.0 2.5 0.0 10.0 100.0 1.0K 10.0K Note: In general the center frequency, Q and DC-mode can be set independently. The exception from this rule is the mode (5/xx1111xx) where the center frequency is set to 150Hz instead of 100Hz. 12/43 TDA7411 MID There are 3 parameters programmable in the mid stage: Attenuation Figure 8 shows the attenuation as a function of frequency at a center frequency of 1kHz. Figure 8. Mid Control @ fC = 1kHz, Q = 1 15.0 10.0 5. 0 0. 0 c u d 5.0 -10. 0 e t le -15. 0 100. 0 10.0 Center Frequency 1.0K ) s t( o r P 10.0K o s b O - Figure 9 shows the four possible center frequencies 500Hz, 1kHz, 1.5kHz and 2kHz. ) s ( ct Figure 9. u d o 15.0 r P e 12.5 t e l o 10.0 O bs 7. 5 5. 0 2. 5 0. 0 10.0 100. 0 1.0K 10.0K 13/43 TDA7411 Quality Factor Figure 10 shows the two possible quality factors 1 and 2 at a center frequency of 1kHz. Figure 10. Mid Q-factor @ fC = 1kHz, Gain=14dB 15.0 12.5 10.0 7. 5 5. 0 2. 5 0. 0 100. 0 10.0 TREBLE 1.0K o s b O - There are two parameters programmable in the treble stage: Attenuation o r P 10.0K e t le c u d Figure 11 shows the attenuation as a function of frequency at a center frequency of 17.5kHz. ) s ( ct Figure 11. Treble Control @ fC = 17.5kHz 15.0 u d o r P e 10.0 t e l o s b O 5.0 0.0 -5.0 -10.0 -15.0 10.0 14/43 100.0 1.0K 10.0K ) s t( TDA7411 Center Frequency Figure 12 shows the four possible center frequencies 10k, 12.5k, 15k and 17.5kHz. Figure 12. Treble Center Frequencies @ Gain = 14dB 15.0 12.5 10.0 7.5 5.0 2.5 c u d 0.0 10.0 100.0 1.0K o r P 10.0K e t le Speaker Coupling ) s t( o s b O - In some applications additional signal manipulations are desired, for example surround-sound or moreband-equalizing. For this purpose an AC-Coupling with four different AC-Coupling inputs is placed before the speaker-attenuators. The input-impedance of the AC-Inputs is always 50kΩ with exception of AC input ACin1, which has programmable input impedance. For ACin3 exists an internal mixing stage and an internal mono low pass filter, which is available as input only for the speaker FreeL/R. ) s ( ct There are two possibilities for internal DC Coupling: u d o – main channel after the bass filter – main channel after the middle filter (same as at ACout pin) The I2C bus programming tables shows the possible speaker sources. r P e t e l o s b O 15/43 TDA7411 Low Pass Filter Figure 13 shows the five possible corner frequencies of the low pass filter: Figure 13. Low Pass Corner Frequencies 0 -3 dB -10 -20 -30 c u d -40 10 Hz 100 e t le Anti-Radiation-Filter ) s t( 100 0 o r P o s b O - An Anti-Radiation-Filter is implemented to suppress the radiation at the SC-clock-frequency and its harmonics. This radiation is only present if the stereo decoder is selected and/or SC-Filters are active (0dB). If not, the filter can be switched off in order to optimize the noise-performance. ) s ( ct Speaker Attenuator The speaker-attenuators have exactly the same control range like the Volume-stage. Every stereo speaker stage has an implemented independently I2C controlled and Mute pin controlled SoftMute stage (see section mute capability of AP). u d o r P e t e l o s b O 16/43 TDA7411 STEREODECODER PART Features: – no external components necessary – PLL with adjustment free, fully integrated VCO – automatic pilot dependent MONO/STEREO switching – very high suppression of intermodulation and interference – programmable Roll-Off compensation – dedicated RDS-Soft mute – High cut- and Stereo blend-characteristics programmable in a wide range – internal Noise blanker with several threshold controls – alternative frequency search function – Multipath-detector with programmable internal/external influence – I2C-bus control of all necessary functions . c u d ) s t( ELECTRICAL CHARACTERISTICS (VS = 8V; deemphasis time constant = 50µs,VMPX = 500mV(75KHz deviation), fm= 1KHz, Gv = 6dB, Tamb = 27°C; unless otherwise specified) Symbol Parameter Vin MPX Input Level Rin Input Resistance GMIN Min. Input Gain GMAX Max. Input Gain GSTEP Step Resolution SVRR Test Condition Gv = 3.5dB Supply Voltage Ripple Rejection Vripple = 100mV; f = 1KHz α Max. channel Separation THD Total Harmonic Distortion S+N -------------N Signal plus Noise to Noise Ratio MONO/STEREO-SWITCH o r P e c u d o s b O - e t le (t s) o r P Min. Typ. Max. Unit 0.5 1.25 VRMS 70 100 130 KΩ 1.5 3.5 4.5 dB 8.5 11 12.5 dB 1.75 2.5 3.25 dB 35 60 30 50 0.02 A-weighted, S = 2VRMS 80 91 15 VPTHST1 Pilot Threshold Voltage for Stereo, PTH = 1 10 VPTHST0 Pilot Threshold Voltage dB dB 0.3 % dB 25 mV for Stereo, PTH = 0 15 25 35 mV VPTHMO1 Pilot Threshold Voltage for Mono, PTH = 1 7 12 17 mV VPTHMO0 Pilot Threshold Voltage for Mono, PTH = 1 10 19 25 mV t e l o s b O tHC50 Deemphasis Time Constant Bit 7, Subadr, 10 = 0, VLEVEL >> VHCH 25 50 75 µs tHC75 Deemphasis Time Constant Bit 7, Subadr, 10 = 1, VLEVEL >> VHCH 50 75 100 µs tHC50 Highcut Time Constant Bit 7, Subadr, 10 = 0, VLEVEL >> VHCL 100 150 200 µs tHC75 Highcut Time Constant Bit 7, Subadr, 10 = 1, VLEVEL >> VHCL 150 225 300 µs PLL ∆f/f Capture Range 0.5 % DEEMPHASIS and HIGHCUT 17/43 TDA7411 ELECTRICAL CHARACTERISTICS (continued) (VS = 8V; deemphasis time constant = 50µs,VMPX = 500mV(75KHz deviation), fm= 1KHz, Gv = 6dB, Tamb = 27°C; unless otherwise specified) Symbol Parameter Test Condition Min. Typ. Max. 5 5.3 Unit STEREOBLEND-and HIGHCUT-CONTROL REF5V Internal Reference Voltage TCREF5V Temperature Coefficient 4.7 3300 V ppm LGmin Min. LEVEL Gain -1 0 1 dB LGmax Max. LEVEL Gain 8 10 12 dB LGstep LEVEL Gain Step Resolution 0.3 0.67 1 dB VSBLmin Min. Voltage for Mono 25 29 33 %REF5V VSBLmax Min. Voltage for Mono 54 58 62 %REF5V VSBLstep Step Resolution 2.2 4.2 6.2 %REF5V VHCHmin Min. Voltage for NO Highcut 38 42 46 %REF5V VHCHmax Min. Voltage for NO Highcut 62 66 70 VHCHstep Step Resolution 5 8.4 12 %REF5V VHCLmin Min. Voltage for FULL Highcut 12 17 22 VHCLmax Max. Voltage for FULL Highcut 28 33 38 %VHCH VHCLstep Step Resolution 2.2 c u d %VHCH 6.2 %VHCH 75 dB 62 dB 90 dB 65 dB 75 dB 70 dB 75 dB Signal f = 114KHz 95 dB Signal f = 190KHz 84 dB α19 Pilot Signal f = 19KHz α38 Subcarrier f = 38KHz α57 Subcarrier f = 57KHz α76 Subcarrier f = 76KHz 40 Intermodulation (Note 1) α2 fmod = 10KHz, fspur = 1KHz α3 fmod = 13KHz, fspur = 1KHz ) s ( ct Traffic Ratio (Note 2) α57 Signal f = 57KHz ro P e let Carrier and harmonic suppression at the output o s b O - u d o 4.2 ) s t( 50 %REF5V dB SCA - Subsidiary Communications Authoorization (Note 3) α67 Signal f = 67KHz r P e ACI - Adjacent Channel Interference (Note 4) α114 t e l o α190 Notes to the characteristics: s b O 1. Intermodulation Suppression: V O ( sig na l ) ( at1 kHz ) α 2 = ----------------------------------------------------- ; fs = (2 x 10kHz) - 19kHz V O ( s pu rious ) ( a t1kHz ) V O ( sig na l ) ( at1 kHz ) - ; fs = (3 x 13kHz) - 38kHz α 3 = ----------------------------------------------------V O ( s pu rious ) ( a t1kHz ) measured with: 91% pilot signal; fm = 10kHz or 13kHz. 2. Traffic Radio (V.F.) Suppression: measured with: 91% stereo signal; 9% pilot signal; fm=1kHz; 5% sub- 18/43 TDA7411 carrier (f = 57kHz, fm = 23Hz AM, m = 60%) V O ( sig nal ) ( at1 kHz ) α57 ( V.W > F. ) = ------------------------------------------------------------------------V O ( sp uriou s ) ( at1k Hz ± 23k Hz ) 3. SCA ( Subsidiary Communications Authorization ) measured with: 81% mono signal; 9% pilot signal; fm = 1kHz; 10%SCA - subcarrier ( fs = 67kHz, unmodulated ). V O ( si gna l ) ( at1 kHz ) α 67 = ----------------------------------------------------- ; Fs =(2 x 38kHz) - 67kHz V O ( spu riou s ) ( a t9k Hz ) 4. ACI ( Adjacent Channel Interference ): V O ( s igna l ) ( a t1kHz ) - ; Fs = 110kHz - (3 x 38kHz) α 114 = ----------------------------------------------------V O ( sp uriou s ) ( at4k Hz ) V O ( s igna l ) ( a t1kHz ) α 114 = ----------------------------------------------------- ; Fs = 186kHz - (5 x 38kHz) V O ( sp uriou s ) ( at4k Hz ) measured with: 90% mono signal; 9% pilot signal; fm =1kHz; 1% spurious signal( fs = 110kHz or 186kHz, unmodulated). c u d NOISE BLANKER PART Features: – internal 2nd order 140kHz high-pass filter – programmable trigger threshold e t le ) s t( o r P – trigger threshold dependent on high frequency noise with programmable gain – additional circuits for deviation- and fieldstrength-dependent trigger adjustment o s b O - – very low offset current during hold time due to opamps with MOS inputs – 4 selectable pulse suppression times – programmable noise rectifier charge/discharge current ) s ( ct ELECTRICAL CHARACTERISTICS (continued) Symbol VTR Parameter Trigger Threshold 0) 1) o r P e du Test Condition meas. with VPEAK = 0.9V t e l o bs O VTRNOISE Noise Controlled Trigger Threshold 2) VRECT Rectifier Voltage meas. with VPEAK = 1.5V VMPX = 0mV VMPX = 50mV; f = 150KHz VMPX = 200mV; f = 150KHz Min. Typ. Max. Unit NBT = 111 (c) 30 (c) mVOP NBT = 110 (c) 35 (c) mVOP NBT = 101 (c) 40 (c) mVOP NBT = 100 (c) 45 (c) mVOP NBT = 011 (c) 50 (c) mVOP NBT = 010 (c) 55 (c) mVOP NBT = 001 (c) 60 (c) mVOP NBT = 000 (c) 65 (c) mVOP NCT = 00 (c) 260 (c) mVOP NCT = 01 (c) 220 (c) mVOP NCT = 10 (c) 180 (c) mVOP NCT = 11 (c) 140 (c) mVOP NRD 6) = 00 0.5 0.9 1.3 V 1.5 1.7 2.1 V 3.5 V 19/43 TDA7411 ELECTRICAL CHARACTERISTICS (continued) Symbol Parameter Test Condition VRECT DEV deviation dependent rectifier Voltage 3) means. with VMPX = 500mV (75KHz dev.) VRECT FS Fieldstrength Controlled Rectifier Voltage 4) TS Suppression Pulse Duration 5) means. with VMPX = 0mV VLEVEL