TDA7339 Datasheet, PDF (1/12 Pages) STMicroelectronics – 3 BAND DIGITAL CONTROLLED AUDIO PROCESSOR

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TDA7339
3 BAND DIGITAL CONTROLLED AUDIO PROCESSOR
PRODUCT PREVIEW
THREE STEREO INPUT
ONE RECORD OUTPUT
ONE STEREO OUTPUT
TWO INDEPENDENT VOLUME CONTROL IN
1.0dB STEPS
TREBLE, MIDDLE AND BASS CONTROL IN
1.0dB STEPS
ALL FUNCTIONS PROGRAMMABLE VIA SE-
RIAL I² CBUS
DIP28
DESCRIPTION
The TDA7339 is a volume and tone (bass , mid-
dle and treble) processor for quality audio appli-
cation in car radio and Hi-Fi system.
Control is accomplished by serial I²C bus micro-
processor interface.
The AC signal setting is obtained by resistor net-
works and switches combined with operational
amplifiers.
BLOCK DIAGRAM
ORDERING NUMBER: TDA7339
Thanks to the used BIPOLAR/MOS Technology,
Low Distortion, Low Noise and Low DC stepping
are obtained.
IN1(L)
IN2(L)
IN3(L)
IN1(R)
IN2(R)
IN3(R)
3x
2.2µF
C1
2
C2
4
C3
5
R1
2.7K
C7
5.6nF
REC OUT(L) TREBLE(L)
8
3
C9
18nF
M IN(L)
6
C10
22nF
M OUT(L)
7
1st VOL
TREBLE
MIDDLE
MUTE
R3
2.7K
C13
100nF
C14
100nF
B IN(L)
B OUT(L)
9
10
BASS
SOFTMUTE
C4
C5
C6
3x
2.2µF
MULTIPLEXER
27
25
24
MUTE
1st VOL
TREBLE
SERIAL BUS DECODE & LATCHES
MIDDLE
BASS
SOFTMUTE
1
V_S
SUPPLY
16 28 21
26
23
22
ANAL.GND CREF REC OUT(R) TREBLE(R) M IN(R) M OUT(R)
C_REF
10µF
C8
5.6nF
C11
18nF
C12
22nF
20
B IN(R)
C15
100nF
19
B OUT(R)
C16
100nF
R2
2.7K
R4
5.6K
2nd VOL
12
OUT L
14
SCL
13
SDA
18
ADDR
15
DIG.GND
11 CMUTE
BUS
2nd VOL
17
C_SM 22nF
OUT R
D94AU067C
July 1999
This is preliminary information on a new product now in development. Details are subject to change without notice.
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