TDA7418 STMicroelectronics, TDA7418 Datasheet

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TDA7418

Manufacturer Part Number
TDA7418
Description
IC PROCESSOR CAR AUD 3BAND 20SOI
Manufacturer
STMicroelectronics
Type
Audio Processorr
Datasheet

Specifications of TDA7418

Applications
Radio
Mounting Type
Surface Mount
Package / Case
20-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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Features
Table 1.
November 2008
Input multiplexer
– PD/SE4: pseudo differential stereo 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
– Internal offset-cancellation (AutoZero)
Loudness
– Second order frequency response
– Programmable center frequency
– 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
Bass
– Second order frequency response
– Center frequency programmable in 4 steps
– 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
programmable as single-ended input
steps
(400 Hz / 800 Hz / 2400 Hz)
times
(60 Hz / 80 Hz / 100 Hz / 200 Hz)
(500 Hz / 1 kHz / 1.5 kHz / 2.5 kHz)
TDA7418TR
Order code
TDA7418
Device summary
Temp range, °C
-40 to +85
-40 to +85
Rev 3
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.
– 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
– -15 to 15dB range with 1dB resolution
Speaker
– 4 independent soft step speaker controls,
Subwoofer
– Single-ended mono output
– Independent soft step level control, +15dB
Mute functions
– Direct mute
– Digitally controlled SoftMute with 3
(10 kHz / 12.5 kHz / 15 kHz / 17.5 kHz)
+15dB to -79dB with 1dB steps direct mute
to -79dB with 1dB steps
programmable mute-times
(0.48 ms / 0.96 ms /123 ms)
Package
3 band car audio processor
SO20
SO20
SO20
Tape and reel
TDA7418
Packing
Tube
www.st.com
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Related parts for TDA7418

TDA7418 Summary of contents

Page 1

... Direct mute – Digitally controlled SoftMute with 3 programmable mute-times (0. 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. Temp range, °C ...

Page 2

... Middle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.7.1 4.7.2 4.7.3 4.8 Treble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.8.1 4.8.2 4.9 Speaker attenuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2/29 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Peak frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Low and high frequency boost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Flat mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Quality factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 DC mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Quality factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 TDA7418 ...

Page 3

... TDA7418 4.10 Subwoofer attenuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 4.11 MUX output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.12 Audioprocessor testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . bus specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.1 Interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.1.1 5.1.2 5.1.3 5.2 Subaddress (receive mode 5.3 Data byte specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 6 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Receive mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Transmission mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Reset condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Contents 3/29 ...

Page 4

... Table 7. Input selector /gain ( Table 8. Loudness ( Table 9. Volume / speaker attenuation (2,7,8,9,10,11 Table 10. Treble filter ( Table 11. Middle filter ( Table 12. Bass filter (5 Table 13. Middle / bass Fc select ( Table 14. Soft mute and soft step time (12 Table 15. Testing audio processor (13 Table 16. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 4/29 TDA7418 ...

Page 5

... TDA7418 List of figures Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 2. Pin out Figure 3. Input stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Figure 4. Loudness attenuation @ f Figure 5. Loudness center frequencies @ Attn. = 15dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Figure 6. Loudness attenuation 2.4kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 7. Softmute timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 8. SoftStep timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Figure 9. Bass control @ f C Figure 10. Bass center frequencies @ Gain = 15dB Figure 11 ...

Page 6

... Block diagram 1 Block diagram Figure 1. Block diagram 6/29 TDA7418 ...

Page 7

... TDA7418 2 Pin description 2.1 Connection diagram Figure 2. Pin out 2.2 Pin list Table 2. Pin list No. Pin Name 1 SE3L 2 SE3R 3 SE2L 4 SE2R 5 SE1L 6 SE1R 7 DIFFL 8 DIFFG 9 DIFFR 10 CREF 11 GND 12 OUTSW 13 OUTRF 14 OUTRR 15 OUTLR 16 OUTLF 17 MUTE / MUXOUT VDD SE3L 1 SE3R 2 SE2L 3 SE2R 4 SE1L ...

Page 8

... L Test condition All single ended inputs Adjacent gain steps G MIN to GMAX Differential 1kHz CM RMS 10kHz CM RMS TDA7418 Value Unit -0.4 to 10 0.4 CC -40 to +85 °C -55 to +150 °C ±2000 V ±200 V ±750 V Min ...

Page 9

... TDA7418 Table 4. Electrical characteristics (continued 8 ° amb Symbol Parameter e Output noise @ speaker outputs No Loudness control A Max. attenuation MAX A Step resolution STEP (1) f Peak frequency Peak Volume control G Max. gain MAX A Max. attenuation MAX A Step resolution STEP E Attenuation set error A E Tracking error ...

Page 10

... L Test condition off ( ( Adjacent attenuation steps TDA7418 Min. Typ. Max. Unit 0.9 1 1.1 1.1 1.25 1.4 1.3 1.5 1.7 1.8 2 2.2 ±14 ±15 ±16 dB 0 3.5 4 ±14 ±15 ±16 dB 0.5 1 1.5 dB 400 ...

Page 11

... TDA7418 Table 4. Electrical characteristics (continued 8 ° amb Symbol Parameter Audio outputs V Clipping level CL R Output impedance OUT R Output load resistance L C Output load capacitor voltage level DC Subwoofer attenuator G Max. gain MAX A Max. attenuation MAX A Step resolution STEP A Mute attenuation MUTE E Attenuation set error ...

Page 12

... 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-Bus- programming not useful to start a new AutoZero-action because no new source is 12/29 QD/SE4 QD/SE4 SE1 SE1 SE2 SE2 SE3 SE3 TDA7418 Input Selector In Gain ...

Page 13

... TDA7418 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 ...

Page 14

... Figure 7. Softmute timing 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 7). 2 C-bus output register is set to 1 from the start of muting 1 EXT. MUTE +SIGNAL REF -SIGNAL BUS OUT 2 Time D97AU634 TDA7418 C-bus ...

Page 15

... TDA7418 4.5 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 ...

Page 16

... 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 The center frequency, Q and DC-mode can be set fully independently. 16/29 TDA7418 = 80Hz C = 80Hz C ...

Page 17

... TDA7418 4.7 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 @ f 4.7.2 Center frequency Figure 14 shows the four possible center frequencies 500Hz, 1kHz, 1.5kHz and 2.5kHz. ...

Page 18

... 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 = 17.5 kHz C TDA7418 ...

Page 19

... TDA7418 4.11 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 (I as MUX output, the output voltage is (InGainL+InGainR)/2 with -3dB attenuation. Figure 18. MUX output configuration 4 ...

Page 20

... 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 1 20/29 ACK R/W ACK ACK DATA TDA7418 ACK P ACK P LSB 0 ...

Page 21

... TDA7418 5.2 Subaddress (receive mode) Table 6. Subaddress (receive mode) MSB LSB Testing Mode Off On Auto Zero Remain Off On Auto Increment Mode Off Main Source Selector Loudness Volume Treble Middle Bass Middle/ Bass Fc Select Speaker Attenuator Left Front Speaker Attenuator Left Rear ...

Page 22

... TDA7418 LSB Function D0 Source Selector 0 PD/SE4 1 SE1 0 SE2 1 SE3 X mute Input Gain 0dB 1dB : 14dB 15dB Diffin Mode Single Ended Stereo Differential Stereo LSB Function D0 Attenuation 0 0dB 1 -1dB : : 0 -14dB 1 -15dB Filter/Center Frequency Off (Flat) D6 must 400Hz 800Hz 2400Hz Shape Low Boost Low & ...

Page 23

... TDA7418 Table 9. Volume / speaker attenuation (2,7,8,9,10,11) MSB Table 10. Treble filter (3) MSB bus specification LSB Function D0 Gain/Attenuation 1 +15dB 0 +14dB : : 1 +1dB 0 0dB 0 0dB 1 -1dB : : 1 -15dB 0 -16dB : : 0 -78dB 1 -79dB x Mute Volume Soft Step on off LSB Function D0 Gain/Attenuation 0 -15dB 1 -14dB : : 0 -1dB 1 0dB 1 0dB 0 +1dB : : 1 +14dB ...

Page 24

... I C bus specification Table 11. Middle filter (4) MSB 24/ TDA7418 LSB Function D0 Gain/Attenuation 0 -15dB 1 -14dB : : 0 -1dB 1 0dB 1 0dB 0 +1dB : : 1 +14dB 0 +15dB Middle Q Factor 0.5 0.75 1 1.25 Middle Soft Step on off ...

Page 25

... TDA7418 Table 12. Bass filter (5) MSB Table 13. Middle / bass Fc select (6) MSB bus specification LSB Function D0 Gain/Attenuation 0 -15dB 1 -14dB : : : 0 -1dB 1 0dB 1 0dB 0 +1dB : : : 1 +14dB 0 +15dB Bass Q Factor 1.0 1.25 1.5 2.0 Bass Soft Step on off LSB Function D0 Middle Center Frequency 0 500Hz 1 1kHz 0 1.5kHz 1 2 ...

Page 26

... TDA7418 LSB Function D0 Soft Mute 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 LSB Function D0 Audio Processor Testing Mode 0 off 1 on Test Multiplexer InMuxOutR LoudOutR VolumeOutR VBG1.26 ...

Page 27

... TDA7418 6 Package information In order to meet environmental requirements, ST (also) offers these devices in ECOPACK packages. ECOPACK 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 trademark. ECOPACK specifications are available at: www.st.com. ...

Page 28

... Revision history 7 Revision history Table 16. Document revision history Date 15-Feb-2007 23-Oct-2008 03-Nov-2008 28/29 Revision 1 Initial release. 2 Updated Table 6: Subaddress (receive mode) on page 3 Corrected Table 6: Subaddress (receive mode) on page TDA7418 Changes 21. 21. ...

Page 29

... TDA7418 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. ...

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