TDA7309_06 Datasheet, PDF (1/14 Pages) STMicroelectronics – DIGITAL CONTROLLED STEREO AUDIO PROCESSOR WITH LOUDNESS

TDA7309
DIGITAL CONTROLLED STEREO AUDIO PROCESSOR
WITH LOUDNESS
1 FEATURES
■ INPUT MULTIPLEXER:
3 STEREO INPUTS
■ RECORD OUTPUT FUNCTION
■ LOUDNESS FUNCTION
■ VOLUME CONTROL IN 1dB STEPS
■ INDEPENDENT LEFT AND RIGHT VOLUME
CONTROL
■ SOFT MUTE FUNCTION
■ ALL FUNCTIONS PROGRAMMABLE VIA
SERIAL I²C BUS
2 DESCRIPTION
The TDA7309 is a control processor with indepen-
dent left and right volume control for quality audio
applications. Selectable external loudness and
soft mute functions are provided.
Control is accomplished by serial I²C bus micro-
processor interface.
Figure 1. Packages
DIP20
Table 1. Order Codes
Part Number
TDA7309
TDA7309D
TDA7309D013TR
SO20
Package
DIP20
SO20
Tape & Reel
The AC signal setting is obtained by resistor net-
works and switches combined with operational
amplifiers.
Thanks to the used BIPOLAR/CMOS Technology,
Low Distortion, Low Noise and Low DC stepping
are obtained.
Figure 2. Block Diagram
3x
2.2µF
17
18
LEFT
INPUTS
20
3x
2.2µF
14
13
RIGHT
INPUTS
11
Recout(L)
1
LOUD(L)
19
100nF
INPUT
SELECTOR
VOLUME +
LOUDNESS
2
MUTE
OUT
LEFT
SERIAL BUS DECODER + LATCHES
VOLUME +
LOUDNESS
SOFT
MUTE
6
DIGGND
4
SDA
5
SCL
8
ADDR
3 CSM
BUS
March 2006
SUPPLY
TDA7309
16
7
VS AGND
15
CREF
10
Recout(R)
22µF
12
LOUD(R)
100nF
MUTE
9
OUT
RIGHT
D93AU045A
Rev. 6
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