audio processor. TDA7720B Datasheet

TDA7720B processor. Datasheet pdf. Equivalent


STMicroelectronics TDA7720B
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


TDA7720B Datasheet
Recommendation TDA7720B Datasheet
Part TDA7720B
Description 3 band car audio processor
Feature TDA7720B; TDA7720B 3 band car audio processor *$3*36 TSSOP28 Features  Input multiplexer – QD1: quasi-.
Manufacture STMicroelectronics
Datasheet
Download TDA7720B Datasheet




STMicroelectronics TDA7720B
Contents
Contents
TDA7720B
1 Block circuit diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2 Pins connection and description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Pins connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4 Description of audioprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1 Input stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1.1 Single-ended stereo input (SE1, SE2, SE3) . . . . . . . . . . . . . . . . . . . . . 14
4.1.2 Quasi-differential stereo Input (QD1,QD2) . . . . . . . . . . . . . . . . . . . . . . . 14
4.1.3 Fast charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.2 Input gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3 Loudness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3.1 Loudness attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3.2 Peak frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.3.3 High frequency boost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.3.4 Flat mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.4 Soft-mute . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.5 Volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.6 Bass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.6.1 Bass attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
4.6.2 Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.6.3 Quality factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.6.4 DC mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.7 Middle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.7.1 Middle attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.7.2 Middle center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
4.7.3 Quality factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2/42 DocID024331 Rev 2



STMicroelectronics TDA7720B
TDA7720B
Contents
4.8
4.9
4.10
4.11
4.12
4.13
4.14
Treble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.8.1 Treble attenuation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
4.8.2 Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
High-pass filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Subwoofer filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Soft-step control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
DC offset detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Output stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Audioprocessor testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
5 I2C bus specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.1 Interface protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.2 I2C bus electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
5.2.1 Receive mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.2.2 Transmission mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.2.3 Reset condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.3 Data byte specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
6 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
DocID024331 Rev 2
3/42





@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)