TDA7469_1 Datasheet, PDF (1/13 Pages) STMicroelectronics – LOW VOLTAGE ANALOG AUDIO PROCESSOR WITH HEADPHONE POWER AMPLIFIER

TDA7469
LOW VOLTAGE ANALOG AUDIO PROCESSOR WITH
HEADPHONE POWER AMPLIFIER
1 FEATURES
■ 2 STEREO INPUT
■ 1 STEREO OUTPUT
■ TREBLE BOOST
■ BASS CONTROL
■ BASS AUTOMATIC LEVEL CONTROL
■ VOLUME CONTROL IN 1dB STEPS
■ MUTE
■ STAND-BY FUNCTION SOFTWARE
CONTROLLED
■ ALL FUNCTION ARE PROGRAMMABLE VIA
SERIAL BUS
2 DESCRIPTION
The TDA7469 is a volume tone (bass and treble) pro-
cessor for quality audio applications in Low voltage
supply portable systems.
Bass ALC (Automatic Level Control) function can be
adjusted by a dedicated pin. The control of all the
functions is accomplished by serial bus.
Figure 2. Block Diagram
Figure 1. Package
SSOP24
Table 1. Order Codes
Part Number
TDA7469
TDA746913TR
Package
SSOP24
Tape & Reel
The AC signal setting is obtained by resistor net-
works and switches combined with operational ampli-
fiers.
Thanks to the used BIPOLAR/CMOS Technology,
Low Distortion, Low Noise and DC stepping are ob-
tained.
0.47µF
IN1-R
25K
25K
0.47µF
IN2-R
25K
25K
0.47µF
ALC
IN1-L
0.47µF
25K
25K
0.47µF
IN2-L
25K
25K
D00AU1234
3.3nF
MUX_R TREBLE-R
5.6K
68nF 68nF
BASSI-R
BASSO-R
+6dB ÷
0dB
VOLUME
+6dB ÷
-63dB
gm
TREBLE
BASS_ALC
CONTROL
HALF_WAVE
RECTIFIER
+6dB ÷
-63dB
VOLUME
+6dB ÷
0dB
TREBLE
gm
MUX_L
TREBLE-L
3.3nF
RB
BASS
x1
SUPPLY
220µF
PGND-R
PVS-R
16Ω or
32Ω
OUT-R
I2C BUS DECODER + LATCHES
SUPPLY
BASS
RB
x1
VREF
SUPPLY
SCL
SDA
PVS-L
PGND-L
220µF
VS
OUT-L
16Ω or
32Ω
BASSI-L
BASSO-L GND
68nF 68nF
5.6K
CREF
22µF
December 2004
REV. 3
1/13