E-TDA7409D STMicroelectronics, E-TDA7409D Datasheet
E-TDA7409D
Specifications of E-TDA7409D
Available stocks
Related parts for E-TDA7409D
E-TDA7409D Summary of contents
Page 1
... The TDA7409 is a high performance signal proces- sor specificall designed for car radio applications. The device includes a high performance audiopro- cessor with fully integrated audio filters. The digital control allows a programming in a wide range of all the filter characteristics. By the use of a BICMOS- BLOCK DIAGRAM SE1L ...
Page 2
... Th j-pins ABSOLUTE MAXIMUM RATINGS Symbol V Operating Supply Voltage s T Operating Temperature Range amb T Storage Temperature Range stg ESD All pins are protected against ESD according to the MIL883 standard. PIN CONNECTION SE1L SE1R SE2L SE2R SE3L SE3R SE4R SE4L CREF GND 2/25 ...
Page 3
... In-Gain 0..14dB, 1dB steps, 14..20dB, 2dB steps Auto Zero Beep internal Beep with 3 frequencies 781Hz/1.56KHz/1.8KHz Mixing stage 4 step-mixing-stage with mono or beep as mix-signals Loudness second order frequenciy response programmable center frequency 15 x 1dB steps selectable low & high frequency boost selectable flat-mode (constant sttenuation) ...
Page 4
... G Max. Gain MAX A Max. Attenuation MAX A Step Resolution STEP E Attenuation Set Error A E Tracking Error T 4/25 =9V; T =25 ;R =10k ; all gains = 0dB 1kHz; unless otherwise S AMB L Test Conditions all single ended Inputs Adjacent Gain Steps MIN MAX Main / Mix-Source Main / Mix-Source ...
Page 5
... High Threshold for SM - Pin TH high R Internal pull-up resistor PU V Pull-Up Voltage PU SOFT STEP T Switch time SW 1) Center frequency 2.4KHz makes 1KHz bottom frequency at low & high frequency boost condition. 2) The SM-Pin is active low (Mute = 0) BASS CONTROL C Control Range RANGE A Step Resolution STEP f Center Frequency C ...
Page 6
... Control Range RANGE A Step Resolution STEP A Output Mute Attenuation MUTE 6/25 Test Conditions off only for attenuation up to 24dB Adjacent Attenuation Steps Data bit D1 0.3% Min. Typ. Max. Unit 0.9 1 1.1 1.1 1.25 1.4 1.3 1.5 1.7 1 +14 ...
Page 7
... Channel Separation left/right C E Total Tracking Error T 1.0 DESCRIPTION OF FUNCTIONALITY 1.1 Input stages The input stages have remained the same as in preceding ST-Audioprocessors. Figure 1. Input-stages Test Conditions Adjacent Attenuation Steps BW = 20Hz - 20kHz all gains = 0dB single ended inputs all gains = 0dB flat ...
Page 8
... TDA7409 1.2 AutoZero In order to reduce the number of pins there 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 before the Mixing-block to eliminate all offsets generated by the Input-Stages and the In-Gain (Please notice that externally generated offsets, e ...
Page 9
... Figure 3. Loudness Attenuation @ 1.4.2 Center Frequency Figure 4 shows the three possible peak-frequencies 400Hz , 800Hz and 2.4kHz. Figure 4. Loudness Center frequencies @ Attn. = 15dB = 400Hz TDA7409 - - 9/25 ...
Page 10
... The mute process can either be activated by the 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 6). For timing purposes the Bit 0 of the I2C-bus output register is set to 1 from the start of muting until the end of de-muting. ...
Page 11
... Note: For steps more than 1dB the SoftStep mode should be deactivated because it could generate a 1dB error during the blend-time. 1.7 Bass There are three parameters programmable in the bass stage: 1.7.1 Attenuation Figure 8 shows the attenuation as a function of frequency at a center frequency of 80Hz. ...
Page 12
... Figure 9 shows the four possible center frequencies 60, 80 ,100 and 200Hz. Figure 9. Bass center Frequencies @ Gain = 15dB 1.7.3 Quality Factors Figure 10 shows the four possible quality factors 1, 1.25, 1.5 and 2. Figure 10. Bass Quality factors @ Gain = 14dB 80Hz 15.0 12.5 10.0 7.5 5.0 2.5 0.0 10.0 ...
Page 13
... 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 11. Bass normal and DC Mode @ Gain = 14dB, f 15.0 12.5 10.0 7.5 5.0 2.5 0.0 10 ...
Page 14
... Due to practical aspects the steps in the speaker-attenuators are not linear over the full range. At attenuations more than 24dB the steps increase from 1.5dB to 10dB (please see data byte specification). 1.10 Subwoofer Attenuator The Subwoofer output is a single ended stereo output. The attenuator is exactly the same like the other speak- ers. 14/25 ...
Page 15
... SM = Soft mute activated X = Not Used The transmitted data is automatic updated after each ACK. Transmission can be repeated without new chipaddress. 2.3 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 1 1 The programming after POR is marked bold-face / underlined in the programming tables ...
Page 16
... For more information see Soft Mute-section 2 For more information see AutoZero-section 3 For more information see Test Programming block 4 If this bit is set to "1", the subaddress is automatically incremented after the transmission of a data-byte. Therefore a transmission of more than one byte without sending the new subaddress is possible. 16/25 LSB A A ...
Page 17
... 2.5.2 Loudness MSB Note 1: The attenuation is specified at high frequencies. Around the center frequency the value is different depending on the programmed attenuation (see Loudness-frequency-response). LSB LSB TDA7409 FUNCTION Source Selector Not used Single Ended 1 Mute Single Ended 2 Single Ended 4 Single Ended 3 Mute Beep ...
Page 18
... TDA7409 2.5.3 Volume MSB Note 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. 2.5.4 Treble Programming MSB 18/25 LSB LSB ATTENUATION Gain/Attenuation not allow not allow +30 ...
Page 19
... Bass Programming MSB Note 3: For more information please refer to section Bass description 2.5.6 Speaker Attenuator Left Front MSB LSB LSB TDA7409 BASS & TREBLE PROGRAMMING Bass Steps 15dB 14dB 13dB 12dB 11dB 10dB 9dB 8dB 7dB 6dB 5dB 4dB 3dB ...
Page 20
... TDA7409 2.5.7 Speaker Attenuator Right Front MSB 2.5.8 Speaker Attenuator Left Rear MSB 20/25 LSB LSB ATTENUATION Attenuation -23 dB -24.5dB -26 dB -28 dB -30 dB -32 dB -35 dB -40 dB -50 dB Speaker Mute ATTENUATION / Soft Step Time Attenuation -23 dB -24.5dB -26 dB -28 dB -30 dB -32 dB -35 dB ...
Page 21
... Speaker Attenuator Right Rear MSB 2.5.10 Subwoofer Attenuator (Left & Right) MSB LSB LSB TDA7409 ATTENUATION Attenuation -23 dB -24.5dB -26 dB -28 dB -30 dB -32 dB -35 dB -40 dB -50 dB Speaker Mute FUNCTION Attenuation -23 dB -24.5dB -26 dB -28 dB -30 dB -32 dB -35 dB -40 dB -50 dB Speaker Mute ...
Page 22
... AC-Coupling X 0 Internal pass 1 Must be "1" 1 Must be "1" Soft Step Time 0.68ms 1.26ms 2.52ms 5.04ms Must be "1" for Auto zero Internal Beep Off ON LSB FUNCTION D 0 Mute 0 enable SoftMute 1 disable SoftMute Mute/Zero Cross-Times 0.48ms 0.96ms 30.7ms / 9ms 122.8ms / 37ms Must BE “0” ...
Page 23
... Testing MSB Figure 14. TDA7409 Application Circuit MUTE 100nF TAPEL 100nF TAPER 100nF FM_L 100nF FM_R 100nF AM_L 100nF AM_R 100nF CD_L 100nF CD_R LSB MUTE SE1L SE1R SE2L SE2R SE3L SE3R SE4L SE4R CREF 10 F D00AU1182 Testing D 0 Main-Testmode 0 off ...
Page 24
... E 7.4 7.6 0.291 e 1. 10.65 0.394 h 0.25 0.75 0.010 L 0.4 1.27 0.016 K 0˚ (min.)8˚ (max 24/25 inch MIN. TYP. MAX. 0.104 0.012 0.020 0.013 0.512 0.299 0.050 0.419 0.030 0.050 OUTLINE AND MECHANICAL DATA SO20 45˚ SO20MEC ...
Page 25
... STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States ...