ST TDA7415CB User Manual
Car-radio multimedia signal processor (CMSP)
Features
■ 6-channel multimedia approach
■ Fully integrated tone control with notch filter
■ 7-band spectrum analyzer
Inputs
■ Three independent signal paths
■ Eight single-ended inputs
■ Two quasi-differential inputs
■ Optional full-differential input
■ Level adjust gain-stages
■ Independent soft-mute and direct-mute
Outputs
■ Three independent signal paths
■ Six output channels with soft-step volume
■ Output level up to 4VRMS
■ Independent soft-mute and direct-mute
■ Flexible phone/navigation interrupts
■ High-pass and subwoofer low-pass filters
Digital control
■ Selectable SPI- or I
Table 1. Device summary
2
C-bus interface
TDA7415CB
LQFP64
Description
The TDA7415CB is the first 6-channel multimedia
approach in the car-radio signal processor (CSP)
family. It features full software programmability of
three independent sections. The signal processor
combines a three band audio tone control with an
additional notch filter, high/low pass filters for
subwoofer support and a spectrum-analyzer with
the absence of any external components for the
internal filters. Versatile input/output stages and an
extended signal routing scheme provide all the
flexibility that is needed to serve modern 6-channel
applications such as required by DVD technology.
Order code Temp range, °CPackage Packing
TDA7415CB -40 to 85 LQFP64 (10x10x1.4mm) Tray
June 2009 Doc ID 14100 Rev 3 1/50
www.st.com
1
Contents TDA7415CB
Contents
1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 ESD: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3 Pin assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.4 Pin function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3 Deatailed features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4 Electrical specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1 Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.2 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3 Electrical characteristcs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3.1 Input section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.3.2 Main signal processing path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3.3 Output section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3.4 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3.5 Bus and control inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.3.6 DC offset detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5 Description of the audio processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.1 Input section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.2 Main signal processing path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.2.1 Bass filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.2.2 Mid filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.2.3 Treble filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.2.4 Room EQ filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
5.3 Output path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.3.1 High pass filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.3.2 Low pass (subwoofer) filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.3.3 Line driver output stage (presenting the reference concept) . . . . . . . . . 28
5.3.4 Soft mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
2/50 Doc ID 14100 Rev 3
TDA7415CB Contents
5.4 Spectrum analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.5 DC offset detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6 Digital interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.1 Interface in SPI -mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.2 I2C bus interface description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
7.1 Data byte specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
9 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Doc ID 14100 Rev 3 3/50
List of tables TDA7415CB
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Table 3. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 4. Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 5. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 6. Input section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Table 7. Main signal processing path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Table 8. Output section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Table 9. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table 10. Bus and control inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 11. DC offset detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Table 12. Interface in SPI -mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Table 13. Subaddress allocation (receive mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 14. Main signal path input (addr. 00) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 15. Main signal path, bass-filter (addr. 01) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 16. Main signal path, bass-filter (addr. 02) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 17. Main signal path, mid-filter (addr. 03) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 18. Main signal path, treble-filter (addr. 04) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 19. Main signal path, room-EQ (addr. 05) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 20. Input section, signal paths A-C (addr. 06-08) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 21. Input section; other settings (addr. 09) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table 22. Output section, signal path 0 (addr. 10) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 23. Output section, signal path 1 and 2 (addr. 11) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Table 24. Output section, high-pass filters (addr. 12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 25. Output section, volume 0L, 0R, 1L, 1R, 2L, 2R (addr. 13-16, 18, 19) . . . . . . . . . . . . . . . . 42
Table 26. Output section, subwoofer low-pass filter (addr. 17) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Table 27. Output section, bus-mutes (addr. 20) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Table 28. DC-detector and other output section settings (addr. 21) . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Table 29. Soft-mute and soft-step fader time (addr. 22) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Table 30. Spectrum analyzer settings (addr. 23) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Table 31. Testing * (addr. 31) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Table 32. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4/50 Doc ID 14100 Rev 3
TDA7415CB List of figures
List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 2. Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 3. Signal-flow input-section (the following soft-mute and output buffer are not shown) . . . . . 18
Figure 4. Bass control range; fC= 60Hz, Q= 1.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 5. Bass center frequencies; gain= 15dB, Q= 1.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 6. Bass filter quality factors; f
Figure 7. Bass DC-mode frequency responses; gain= 15dB, Q= 1.5 . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 8. Mid control range; fC= 1kHz, Q= 1.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 9. Mid center frequencies; gain= 15dB, Q= 1.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 10. Mid filter quality factors; fC= 1kHz, gain= 15dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 11. Treble control range; fC= 12.5kHz, Q= 1.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 12. Treble center frequencies; gain= 15dB, Q= 1.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 13. Room-EQ control range; fC= 200Hz, Q= 1.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 14. Room-EQ notch frequencies; attenuation= -7dB, Q= 1.0. . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 15. Room-EQ notch filter quality factors; fC= 200Hz, attenuation= 7dB.. . . . . . . . . . . . . . . . . 25
Figure 16. Signal flow output section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 17. High-pass corner frequencies; Q= 0.707 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 18. Low-pass corner frequencies; Q= 0.707. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 19. Line-driver output with reference generation scheme. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 20. Soft-mute signal envelope versus time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 21. Spectrum analyzer block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 22. Read cycle timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 23. DC-offset detection circuit (simplified) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 24. Switching characteristics (SPI-mode): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 25. Interface in SPI -mode diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 26. I
Figure 27. Typical application connections diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Figure 28. LQFP64 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
2
C bus interface diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
= 60Hz, gain= 15dB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
C
Doc ID 14100 Rev 3 5/50
Block diagram TDA7415CB
1 Block diagram
Figure 1. Block diagram
6/50 Doc ID 14100 Rev 3
TDA7415CB Pin description
2 Pin description
2.1 ESD:
All pins are protected against ESD according to the MIL883 standard.
2.2 Thermal data
Table 2. Thermal data
Symbol Description Value Unit
R
th j-pins
Thermal resistance junction-to-pins 50 °C/W
2.3 Pin assignment
Figure 2. Pin connection (top view)
Doc ID 14100 Rev 3 7/50
Pin description TDA7415CB
2.4 Pin function
Table 3. Pin description
PIN
Direction
(1)
Name Description
1 I CDCh L CD-changer input, pseudo differential, left channel
2 I CDCh Common CD-changer input, pseudo differential common
3 I CDCh R CD-changer input, pseudo differential, right channel
4 I AUX L Aux./Navigation input, pseudo differential, left channel
5 I AUX Common Aux./Navigation input, pseudo differential common
6 I AUX R Aux./Navigation input, pseudo differential, right channel
7 O MUXA L IN-Section, signal path A output (Main), left channel
8 O MUXA R IN-Section, signal path A output (Main), right channel
9 O MUXB L IN-Section, signal path B output (Sub), left channel
10 O MUXB R IN-Section, signal path B output (Sub), right channel
11 O MUXC L IN-Section, signal path C output (Aux.), left channel
12 O MUXC R IN-Section, signal path C output (Aux.), right channel
13 I WinIn Zero-window Sense input (from power-amp)
14 P WinTC0 Zero-window comparator 0 time constant
15 P WinTC1 Zero-window comparator 1 time constant
16 O DCErr DC-detector Error output
17 I SEL Interface-select; SPI: receive enable
2
18 I / OC SDA I
19 I SCL I
C/SPI-bus serial data input/output
2
C/SPI-bus serial clock input
20 I SAclk Spectrum analyzer clock input
21 I SAres. Spectrum analyzer reset
22 O SAout Spectrum analyzer analog voltage output
23 I SAin Spectrum analyzer external input
24 P Ref5V5
5.5V-reference decoupling pin, connects to external
capacitor
25 I VolIn L Main signal path input, left channel
26 I VolIn R Main signal path input, right channel
27 P Ref3V3
3.3V-reference decoupling pin, connects to external
capacitor
28 I Mute0 OUT-section, signal path 0 (front) direct mute
29 I Mute1 OUT-section, signal path 1 (rear) direct mute
30 I Mute2 OUT-section, signal path 2 (other) direct mute
31 O ACout L Main signal path output, left channel
8/50 Doc ID 14100 Rev 3
TDA7415CB Pin description
Table 3. Pin description (continued)
PIN
Direction
(1)
Name Description
32 O ACout R Main signal path output, right channel
33 I ACin3 R OUT-section, AC-coupled input 3, right channel
34 I ACin3 L OUT-section, AC-coupled input 3, left channel
35 I ACin2 R OUT-section, AC-coupled input 2, right channel
36 I ACin2 L OUT-section, AC-coupled input 2, left channel
37 I ACin1 R OUT-section, AC-coupled input 1, right channel
38 I ACin1 L OUT-section, AC-coupled input 1, left channel
39 I ACin0 R OUT-section, AC-coupled input 0, right channel
40 I ACin0 L OUT-section, AC-coupled input 0, left channel
41 S VCC Device supply pin
42 S GND Device ground pin
43 O LDout2 R Line-driver output, signal path 2 (other), right channel
44 O LDout2 L Line-driver output, signal path 2 (other), left channel
45 O LDout1 R Line-driver output, signal path 1 (rear), right channel
46 O LDout1 L Line-driver output, signal path 1 (rear), left channel
47 S PGND
48 P PREF
Device ground pin (dual supply), connects to system ground
Line-driver-reference decoupling pin, connects to external
capacitor
49 O LDout0 R Line-driver output, signal path 0 (front), right channel
50 O LDout0 L Line-driver output, signal path 0 (front), left channel
51 S VP Device supply pin (dual supply), Output section
52 O PAout1 R Out-section rear output, right channel
53 O PAout1 L Out-section rear output, left channel
54 O PAout0 R Out-section front output, right channel
55 O PAout0 L Out-section front output, left channel
56 I Mute C IN-section, signal path 2 (Aux.) direct mute
57 I Mute B IN-section, signal path 1 (Sub) direct mute
58 I Mute A IN-section, signal path 0 (Main) direct mute
59 I Tuner L Tuner input, left channel
60 I Tuner R Tuner input, right channel
61 I CD L CD input, left channel
62 I CD R CD input, right channel
63 I MD L Minidisk (mono-differential Phone+) input, left channel
64 I MD R Minidisk (mono-differential Phone-) input, right channel
1. I= input, O= output, OC =open collector, P= passive external component, S= supply
Doc ID 14100 Rev 3 9/50
Deatailed features TDA7415CB
3 Deatailed features
The TDA7415CB is composed of four major building blocks. - The IN-section, the spectrumanalyzer, the main signal processing path and the OUT-section; Individually featuring:
IN section
● Three independent signal-paths (front, rear and auxiliary) with independent soft-mute.
● Six stereo inputs; 3 single ended; 1 single ended or full differential mono; 2 quasi-
differential.
● ±15dB level-adjust with 1 dB steps.
● Pin-accessible and/or I
Spectrum analyzer
● 7-band, fully integrated 2
different visual behavior.
● Dedicated one or two-wire serial port for analog data-readout.
● Analog output voltage 3.3 V-μP compatible.
Main signal processing path
2
C/SPI-controlled soft-mute (direct mute) for each signal path.
nd
-order band-pass filters with programmable filter quality for
● ±15dB level-adjust with 1dB steps.
● Fully integrated bass-, middle- and treble-tone control. All filters offer 2
nd
-order
frequency response with programmable filter quality and center frequency.
● Room-acoustics notch filter (Room-EQ) allows the suppression of primary car-body
resonance.
OUT section
● Three independent signal-paths (front, rear and others) with individual soft-mute.
● Four AC-coupled, single ended stereo inputs.
● Pin-accessible soft-mute (direct mute), for each signal path.
2
● I
C/SPI-controlled soft-mute, independent for all six (mono) channels
● Main signal path monitor-select (pre/post tone control).
● L/R-channel independent phone, navigation or phone/navigation-mix signal interrupts
for front signal path; L/R-channel independent phone or navigation interrupts for rearand others-path.
nd
● 2
● 2
● Soft-step volume with 79 to 25 dB range for each signal path.
● Four dedicated outputs for an internal (on-board) power amplifier.
● Six 4V
● Offset voltage detection circuit for on-board power amplifier failure diagnosis.
-order frequency response high-pass filters for front- and rear-signal path.
nd
-order frequency response subwoofer low-pass filter for others-signal path.
line-driver outputs for an external (remote) power amplifier.
RMS
10/50 Doc ID 14100 Rev 3
TDA7415CB Electrical specification
4 Electrical specification
4.1 Supply
Table 4. Supply
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
V
I
total
Supply voltage - 7.5 8.5 9.5 V
CC
Supply current (line
P
driver)
- 7.5 12 13 V
Total supply current VCC = 8.5 V; VP = 12V - 45 - mA
SVRR Ripple rejection @ 1 kHz Audio processor (all filters flat) - 60 - dB
4.2 Absolute maximum ratings
Table 5. Absolute maximum ratings
Symbol Parameter Value Unit
V
T
T
V
amb
Operating supply voltage 10 V
CC
Operating supply voltage 13 V
P
Operating temperature range -40 to 85 °C
Storage temperature range -55 to +150 °C
stg
4.3 Electrical characteristcs
4.3.1 Input section
V
= 8.0 V; VP = 12.0 V; T
CC
otherwise specified.
Table 6. Input section
Symbol Parameter Test conditions / remark Min. Typ. Max. Unit
R
in
V
CL
CMRR
Input Impedance
Input Clipping Level
(THD ≤ 0.1%)
Common mode rejection ratio
Differential inputs (CD, AUX.)
= 25 °C; RL =10 kΩ ; all gains = 0 dB; f = 1 kHz; unless
amb
Single-ended inputs 70 100 130 kΩ
Differential inputs 70 100 130 kΩ
MD-input, differential mode 35 56 65 kΩ
Single ended inputs 1.4 1.5 - V
Differential inputs;
VCM = 1 V
V
CM
= 1 V
RMS
RMS
(1)
2.0 2.2 - V
@ 1 kHz 40 70 - dB
@ 10 kHz 40 60 - dB
Doc ID 14100 Rev 3 11/50
RMS
RMS
Electrical specification TDA7415CB
Table 6. Input section (continued)
Symbol Parameter Test conditions / remark Min. Typ. Max. Unit
V
CMRR
S
IN
G
IN MIN
G
IN MAX
G
STEP
V
DC
AT T
MUTE
Common mode rejection ratio
MD
Mono differential input (MD)
= 1 V
CM
V
= 1 V
CM
Input separation - 80 100 - dB
Min. input gain
input to output,
Max. input gain 14 15 16 dB
Gain-adjust step resolution - 0.5 1 1.5 dB
Adjacent gain steps - 0.5 6 mV
DC-offset steps
G
to G
MIN
Mute attenuation - 80 100 - dB
T1 0.10.240.4 ms
@ 1 kHz 40 66 - dB
RMS
@ 10 kHz 40 56 - dB
RMS
(1)
MAX
-16 -15 -14 dB
-535mV
t
SMC
Soft-mute completion time,
ramp-up or -down
T2 0.25 0.48 0.75 ms
T3 7 10.2 13 ms
T4 16 20.4 26 ms
V
NO
V
OUT,max
Output-noise, MUX-Outputs 20 Hz - 20 kHz; all flat, 0 dB - 8 15 µV
Maximum output level R
≥ 2 kΩ; THD ≤ 0.1 % 1.4 1.5 - V
LOAD
RL Output load resistance THD ≤ 0.1 % 1.0 - - kΩ
Output load capacitance - - - 10 nF
L
Output impedance - - 24 100 Ω
DC voltage level - 3.1 3.3 3.5 V
R
C
OUT
V
DC
Spectrum Analyzer (see figure 21)
V
V
f
SAclk
t
SAdel
R
SAin
SAout
f
C1
f
C2
f
C3
f
C4
f
C5
f
C6
f
C7
Q
Input impedance - 70 100 130 kΩ
in
Max. Input level, SAin-pin 3.3V full scale at SAout-pin - 1.0 - V
Output Voltage Range R
Center Frequency, band 1
Center Frequency, band 2
Center Frequency, band 3
Center Frequency, band 4
Center Frequency, band 5
Center Frequency, band 6
Center Frequency, band 7
Filter Quality Factor
f
(2)
(2)
(2)
(2)
(2)
(2)
(2)
(2)
LOAD
≥ 1MΩ; V
SAin
≤ 1V
RMS
0-3.3V
-556269Hz
- 141 157 173 Hz
- 356 396 436 Hz
- 0.911.1kHz
- 2.26 2.51 2.76 kHz
- 5.70 6.34 6.98 kHz
- 14.4 16.0 17.6 kHz
Q
1
Q
2
1.40 1.75 2.10 -
2.80 3.5 4.20 -
Read-out clock frequency - 1 - 100 kHz
Analog output delay time C
at SAout-pin ≤ 100 pF - 1 2 μs
Load
RMS
RMS
12/50 Doc ID 14100 Rev 3
TDA7415CB Electrical specification
Table 6. Input section (continued)
Symbol Parameter Test conditions / remark Min. Typ. Max. Unit
t
repeat
t
intres
t
SAres
1. All differential inputs or differential configurations have -3 dB input gain.
Read-out cycle repeat time Recommended refresh rate 50 - - ms
Internal reset time Auto-reset mode enabled 3 4 5 ms
Reset pulse width Auto-reset mode disabled 500 - - ns
4.3.2 Main signal processing path
Table 7. Main signal processing path
Symbol Parameter Test conditions / remark Min. Typ. Max. Unit
R
in
V
CL
G
IN MIN
G
IN MAX
G
STEP
V
DC
V
OUT,max
R
L
C
OUT
R
OUT
V
DC
Bass Control
Input impedance - 35 50 65 kΩ
Input clipping level THD ≤ 0.1 % 1.4 1.5 - V
Min. input gain input to output; all filters flat -16 -15 -14 dB
Max. input gain - 14 +15 16 dB
Gain-adjust step resolution - - 1 - dB
Adjacent gain steps - 0.5 6 mV
DC-offset steps
G
Maximum output level R
to G
MIN
LOAD
MAX
≥ 2 kΩ; THD ≤ 0.1 % 1.4 1.5 - V
-530mV
Output load resistance THD ≤ 0.1 % 1.0 - - kΩ
Output load capacitance - - - 10 nF
Output impedance - - 24 36 Ω
DC voltage level - 3.1 3.3 3.5 V
RMS
RMS
G
RANGE
A
STEP
Gain control range - ±13 ±15 ±17 dB
Step resolution - 0.5 1 1.5 dB
f
C0
f
C1
f
C2
f
f
Center frequency
C
(1)
C3
f
C4
f
C5
f
C6
f
C7
30 40 50 Hz
40 50 50 Hz
50 60 70 Hz
60 70 90 Hz
60 80 100 Hz
80 100 120 Hz
100 120 140 Hz
120 150 170 Hz
Doc ID 14100 Rev 3 13/50
Electrical specification TDA7415CB
Table 7. Main signal processing path (continued)
Symbol Parameter Test conditions / remark Min. Typ. Max. Unit
Q
DC
BASS
GAIN
Quality factor
Bass DC-gain
(1)
MID control
G
RANGE
A
STEP
Q
f
MID
Gain control range - ±13 ±15 ±17 dB
Step resolution - 0.5 1 1.5 dB
Center frequency
C
Quality factor
(2)
(2)
Treble Control
G
RANGE
A
STEP
f
Gain control range - ±13 ±15 ±17 dB
Step resolution - 0.5 1 1.5 dB
Center frequency
C
(1))
ROOM-EQ (acoustics notch-filter)
Q
1
Q
2
Q
3
Q
4
0.911.1 -
1.13 1.25 1.38 -
1.35 1.5 1.65 -
1.822.2 -
DC-mode= off -1 0 1 dB
DC-mode= on 3.5 4.4 5.5 dB
f
C1
f
C2
f
C3
f
C4
Q
1
Q
2
f
C1
f
C2
f
C3
f
C4
450 500 550 Hz
0.911.1kHz
1.35 1.5 1.65 kHz
1.822.2kHz
0.511.1 -
1.822.2 -
6.4 10 13.6 kHz
8.0 12.5 17 kHz
9.6 15 20.4 kHz
11.2 17.5 23.8 kHz
G
RANGE
A
STEP
f
Q
1. Min and Max values are calculated according to simulation results; Functionality is guaranteed by measuring a directly
correlated parameter
Gain control range - -0…9- dB
Step resolution Non-uniform, see description 1 - 2 dB
Notch frequency
C
Quality factor
EQ
(1)
(1)
f
N1
f
N2
f
N3
f
N4
Q
1
Q
2
162 180 198 Hz
180 200 220 kHz
198 220 242 kHz
216 240 264 kHz
0.911.1 -
1.822.2 -
14/50 Doc ID 14100 Rev 3
TDA7415CB Electrical specification
4.3.3 Output section
V
= 8.0 V; VP = 12.0 V; T
CC
otherwise specified
Table 8. Output section
Symbol Parameter Test conditions Min. Typ. Max. Unit
R
in
V
CL
AT T
MUTE
t
SMC
Volume (Soft-step)
G
MAX
A
MAX
A
STEP
E
A
E
T
V
DC
High Pass
f
C
Q
HP
Subwoofer low pass
Input impedance AC0…3 inputs 35 50 65 kΩ
Input Clipping Level THD ≤ 0.1% 1.4 1.5 - V
Mute Attenuation - 80 100 - dB
Soft-mute completion time,
ramp-up or -down
Max. gain - - 25 - dB
Max. attenuation - -82 -79 -76 dB
Step resolution - 0.5 1 1.5 dB
Attenuation set error
Tracking error - - - 2 dB
DC steps
Center frequency
Quality factor
(1)
(2)
= 25 °C; RL =10 kΩ ; all gains = 0 dB; f = 1 kHz; unless
amb
RMS
T1 0.21 0.24 0.26 ms
T2 0.43 0.48 0.52 ms
T3 10.47 11.5 12.45 ms
T4 5.23 5.76 6.22 ms
G= -20 to +20 dB -1.25 0 +1.25 dB
G= -20 to -60 dB -3 0 3 dB
Adjacent attenuation steps - 0.1 3 mV
From 0dB to G
f
C0
f
C1
f
C2
f
C3
f
C4
f
C5
f
C6
f
C7
MIN
-0.55mV
34 40 46 Hz
52 60 68 Hz
72 80 88 Hz
90 100 110 Hz
108 120 132 Hz
135 150 165 Hz
162 180 198 Hz
198 220 242 Hz
Butterworth characteristics 0.665 0.707 0.750 -
f
Q
Center Frequency
C
Quality Factor
HP
Audio outputs
V
PA ,m a x
Max. output level; PA-outputs R
(2)
(2)
f
C0
f
C1
f
C2
f
C3
f
C4
44 50 56 Hz
54 60 66 Hz
72 80 88 Hz
90 100 110 Hz
108 120 132 Hz
Butterworth characteristics 0.665 0.707 0.750 -
≥ 2 kΩ; THD ≤ 0.1 % 1.88 2 - V
LOAD
Doc ID 14100 Rev 3 15/50
RMS
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