廬
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 I
2
CBUS
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 I
2
C bus micro-
processor interface.
The AC signal setting is obtained by resistor net-
works and switches combined with operational
amplifiers.
BLOCK DIAGRAM
DIP28
ORDERING NUMBER:
TDA7339
Thanks to the used BIPOLAR/MOS Technology,
Low Distortion, Low Noise and Low DC stepping
are obtained.
R1
2.7K
C7
5.6nF
3x
2.2碌F
C1
C2
C3
REC OUT(L) TREBLE(L)
2
4
5
MUTE
8
1st VOL
TREBLE
MIDDLE
3
C9
18nF
M IN(L)
6
C10
22nF
M OUT(L)
7
9
C13
100nF
B IN(L)
R3
2.7K
C14
100nF
B OUT(L)
10
2nd VOL
BASS
SOFTMUTE
IN1(L)
IN2(L)
IN3(L)
12
OUT L
14
13
SERIAL BUS DECODE & LATCHES
18
15
1st VOL
TREBLE
MIDDLE
BASS
2nd VOL
SOFTMUTE
17
11
SCL
SDA
ADDR
DIG.GND
CMUTE
C
SM
22nF
OUT R
BUS
MULTIPLEXER
IN1(R)
IN2(R)
IN3(R)
C4
C5
C6
3x
2.2碌F
27
25
24
MUTE
1
V
S
SUPPLY
16
ANAL.GND
CREF
28
21
26
M IN(R)
C11
18nF
23
M OUT(R)
C12
22nF
R2
2.7K
22
20
B IN(R)
C15
100nF
R4
5.6K
19
B OUT(R)
C16
100nF
D94AU067C
REC OUT(R) TREBLE(R)
C
REF
10碌F
C8
5.6nF
July 1999
This is preliminary information on a new product now in development. Details are subject to change without notice.
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