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PDF TDA7720B Data sheet ( Hoja de datos )

Número de pieza TDA7720B
Descripción 3 band car audio processor
Fabricantes STMicroelectronics　
Logotipo STMicroelectronics Logotipo



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No Preview Available ! TDA7720B Hoja de datos, Descripción, Manual

TDA7720B
3 band car audio processor
*$3*36
TSSOP28
Features
Input multiplexer
– QD1: quasi-differential stereo input
– QD2: quasi-differential stereo input
– SE1: stereo single-ended input
– SE2: stereo single-ended input
– SE3: stereo single-ended input
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 -63 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)
– Q programmable 1.0/1.25/1.5/2.0
– DC gain programmable
– -15 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 to 15 dB range with 1 dB resolution
Treble
– 2nd order frequency response
Datasheet - production data
– Center frequency programmable in 4 steps
(10 kHz / 12.5 kHz / 15 kHz / 17.5 kHz)
– -15 to 15 dB range with 1 dB resolution
High-pass
– 2nd order frequency response
– Center frequency programmable in 3 steps
(100 Hz / 120 Hz / 150 Hz)
Subwoofer
– 2nd order low pass filter
– 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
Speaker
– 6 independent soft-step speaker controls
– +15 dB to -79 dB with 1 dB steps
– Two selectable output DC level
– Direct mute
Mute functions
– Direct mute
– Digitally controlled soft-mute 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 TDA7720B is a high performance signal
processor specifically designed for car radio
applications. The device includes a high
performance audio processor 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
Packing
TDA7720B
TDA7720BTR
TSSOP28
TSSOP28
Tube
Tape and reel
September 2013
This is information on a product in full production.
DocID024331 Rev 2
1/42
www.st.com
1

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TDA7720B pdf
TDA7720B
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
Pins connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Loudness attenuation @ fP = 400 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Loudness center frequencies @ attn. = 15 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Loudness attenuation, fc = 2.4 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Soft-mute timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Bass control @ fc = 80 Hz, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Bass center frequencies @ gain = 14 dB, Q = 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Bass quality factors @ gain = 14 dB, fc = 80 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Bass normal and DC mode @ gain = 14 dB, fc = 80 Hz . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Middle control @ fc = 1 kHz, Q = 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Middle center frequency @ gain = 14 dB, Q = 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Middle quality factors @ gain = 14 dB, fc =1 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Treble control @ fc = 17.5 kHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Treble center frequencies @ gain = 14 dB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
High-pass cut frequencies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
DocID024331 Rev 2
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TDA7720B arduino
TDA7720B
Electrical specifications
Table 5. Electrical characteristics (continued)
Symbol
Parameter
Test condition
Min.
QBASS Quality factor (3)
CRANGE Control range (2)
ASTEP Step resolution (2)
DCGAIN Bass-DC-gain
Q1
Q2
Q3
Q4
-
-
DC = off
DC = on, Gain = ±14 dB
-
-
-
-
14
0.5
-1
4
Middle control
CRANGE Control range (2)
ASTEP Step resolution (2)
Fc Center frequency (3)
QMiddle Quality factor (3)
Treble control
-
-
fC1
fC2
fC3
fC4
Q1
Q2
Q3
14
0.5
-
-
-
-
-
-
-
CRANGE Clipping level
ASTEP Step resolution
Fc Center frequency (3)
Speaker attenuators
GMAX
AMAX
ASTEP
AMUTE
Max. gain (2)
Max. attenuation (2)
Step resolution (2)
Mute attenuation
EA Attenuation set error
VDC DC steps
-
-
fC1
fC2
fC3
fC4
-
-
-
-
G = -20 to +15 dB
G = -20 to -79 dB
Adjacent attenuation steps
13
0.5
-
-
-
-
14
-90
0.5
80
-0.75
-10
-5
Typ.
1
1.25
1.5
2
15
1
0
4.4
15
1
500
1
1.5
2.5
0.75
1
1.25
15
1
10
12.5
15
17.5
15
-79
1
90
0
0
0.1
Max.
-
-
-
-
16
1.5
1
4.6
16
1.5
-
-
-
-
-
-
-
16
1.5
-
-
-
-
16
-70
1.5
-
0.75
10
5
Unit
-
-
-
-
dB
dB
dB
dB
dB
dB
Hz
kHz
kHz
kHz
-
-
-
dB
dB
kHz
kHz
kHz
kHz
dB
dB
dB
dB
dB
dB
mV
DocID024331 Rev 2
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