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PDF TDA7718N Data sheet ( Hoja de datos )

Número de pieza TDA7718N
Descripción 3 band car audio processor
Fabricantes ST Microelectronics　
Logotipo ST Microelectronics Logotipo



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TDA7718N
3 band car audio processor
Features
■ Input multiplexer
– QD1: quasi-differential stereo inputs
– SE1: stereo single-ended input
– SE2: stereo single-ended input
– SE3: stereo single-ended input
– FD1 / SE4+SE5: 1 full-differential input or 2
stereo single-ended inputs
■ Loudness
– 2nd order frequency response
– Programmable center frequency
(400 Hz / 800 Hz / 2400 Hz)
– 15 dB with 1 dB steps
– Selectable high frequency boost
– Selectable flat-mode (constant attenuation)
■ Volume
– +23 dB to -31 dB with 1 dB step resolution
– Soft-step control with programmable blend
times
■ Bass
– 2nd order frequency response
– Center frequency programmable in 4 steps
(60 Hz / 80 Hz / 100 Hz / 200 Hz)
www.DataShee–t4UQ.copmrogrammable 1.0/1.25/1.5/2.0
– DC gain programmable
– -15 dB to 15 dB range with 1 dB resolution
■ Middle
– 2nd order frequency response
– Center frequency programmable in 4 steps
(500 Hz / 1 kHz / 1.5 kHz / 2.5 kHz)
– Q programmable 0.75/1.0/1.25
– -15 dB to 15 dB range with 1 dB resolution
■ Treble
– 2nd order frequency response
(10 kHz / 12.5 kHz / 15 kHz / 17.5 kHz)
– Center frequency programmable in 4 steps
(10 kHz / 12.5 kHz / 15 kHz / 17.5 kHz)
– -15 dB to 15 dB with 1 dB resolution
TSSOP28
■ Speaker
– 4 independent soft step speaker controls
– +15 dB to -79 dB with 1 dB steps
– Direct mute
■ Subwoofer
– 2nd order low pass filter with programmable
cut off frequency
(55 Hz / 85 Hz / 120 Hz / 160 Hz)
– 2 independent soft step level control,
+15 dB to –79 dB with 1 dB steps
■ Mute functions
– Direct mute
– Digitally controlled SoftMute with 4
programmable mute-times
(0.48 ms/0.96 ms/8 ms/16 ms)
■ Offset detection
– Offset voltage detection circuit for on-board
power amplifier failure diagnosis
Description
The TDA7718N is a high performance signal
processor specifically designed for car radio
applications. The device includes a high
performance audioprocessor with fully integrated
audio filters and new Soft Step architecture. The
digital control allows programming in a wide range
of filter characteristics.
Table 1. Device summary
Order code
Package
TDA7718N
TSSOP28
TDA7718NTR
TSSOP28
Packing
Tube
Tape and reel
October 2009
Doc ID 16502 Rev 1
1/40
www.st.com
1

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TDA7718N pdf
TDA7718N
List of figures
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
Figure 22.
Block circuit diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
FD / QD / SE block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Loudness attenuation @ fP = 400 Hz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Loudness center frequencies @ attn. = 15 dB.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Loudness attenuation, fc = 2.4 kHz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
SoftMute timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Bass control @ fC = 80 Hz, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Bass center frequencies @ gain = 14 dB, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Bass quality factors @ gain = 14 dB, fC = 80 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Bass normal and DC mode @ gain = 14 dB, fC = 80 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Middle control @ fC = 1 kHz, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Middle center frequencies @ gain = 14 dB, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Middle quality factors @ gain = 14 dB, fC = 1 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Treble control @ fC = 17.5 kHz. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Treble center frequencies @ gain = 14 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Subwoofer cut frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
DC offset detection circuit (simplified) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
I2C bus interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
I2C bus data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
TSSOP28 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
www.DataSheet4U.com
Doc ID 16502 Rev 1
5/40

5 Page





TDA7718N arduino
TDA7718N
Electrical specifications
Table 5.
Symbol
Electrical characteristics (continued)
Parameter
Test condition
Middle control
CRANGE Control range
ASTEP Step resolution
fc Center frequency
QMIDDLE Quality factor
Treble control
CRANGE Clipping level
ASTEP Step resolution
fc Center frequency
Speaker attenuators
GMAX
AMAX
ASTEP
AMUTE
EE
VDC
Max gain
Max attenuation
Step resolution
Mute attenuation
Attenuation set error
DC steps
www.DataSAheuedt4ioU.ocoumtputs
VCL Clipping level
ROUT
RL
CL
VDC
Output impedance
Output load resistance
Output load capacitor
DC voltage level
Subwoofer lowpass
fLP Lowpass corner frequency
-
-
fC1
fC2
fC3
fC4
Q1
Q2
Q3
-
-
fC1
fC2
fC3
fC4
-
-
-
-
-
Adjacent attenuation steps
d = 0.3 %; byte8_D6=1
d = 1 %; byte8_D6=0
-
-
-
-
fLP1
fLP2
fLP3
fLP4
Min. Typ. Max. Unit
±14 ±15 ±16 dB
0.5 1
1.5 dB
- 500 - Hz
-1
- kHz
- 1.5 - kHz
- 2.5 - kHz
- 0.75
-
-
-1 - -
- 1.25
-
-
±14 ±15 ±16 dB
0.5 1
1.5 dB
- 10 - kHz
- 12.5 - kHz
- 15 - kHz
- 17.5 - kHz
14 15
16 dB
- -79 -74 dB
0.5 1
1.5 dB
80 90
- dB
- - 2 dB
- 0.1 5 mV
2-
- VRMS
2.2 -
- VRMS
- 30 100 Ω
2-
- kΩ
- - 10 nF
3.8 4.0 4.2
V
- 55 - Hz
- 85 - Hz
- 120 - Hz
- 160 - Hz
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