TDA7469
LOW VOLTAGE ANALOG AUDIO PROCESSOR WITH
HEADPHONE POWER AMPLIFIER
PRODUCT PREVIEW
2 STEREO INPUT
1 STEREO OUTPUT
TREBLE BOOST
BASS CONTROL
BASS AUTOMATIC LEVEL CONTROL
VOLUME CONTROL IN 1dB STEPS
MUTE
STAND-BY FUNCTION SOFTWARE CON-
TROLLED
ALL FUNCTION ARE PROGRAMMABLE VIA
SERIAL BUS
DESCRIPTION
The TDA7469 is a volume tone (bass and treble)
processor 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.
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 DC stepping are
obtained.
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
June 2001
IN1-R
ALC
IN2-L
0.47
F
0.47
F
SUPPLY
SUPPLY
SUPPLY
VS
GND
CREF
TREBLE-L
D00AU1234
I2C BUS DECODER + LATCHES
SCL
SDA
PVS-L
PGND-L
PGND-R
PVS-R
OUT-L
OUT-R
220
F
22
F
TREBLE-R
MUX_R
MUX_L
RB
RB
BASSI-R
BASSO-R
x1
x1
0.47
F
TREBLE
VOLUME
VOLUME
+6dB
0dB
+6dB
-63dB
+6dB
0dB
3.3nF
+6dB
-63dB
TREBLE
BASS
BASS
BASS_ALC
CONTROL
HALF_WAVE
RECTIFIER
25K
25K
V
REF
gm
68nF
3.3nF
68nF
68nF
68nF
5.6K
5.6K
16
or
32
16
or
32
220
F
BASSO-L
BASSI-L
IN2-R
0.47
F
25K
25K
25K
25K
25K
25K
gm
IN1-L
0.47
F
BLOCK DIAGRAM TDA7469 (SSOP24)
ORDERING NUMBER: TDA7469 (SSOP24)
TDA7469D (SO16)
TDA7469A (SO20)
SO20
SO16
SSOP24
1/17
IN1-R
ALC
0.47
F
0.47
F
SUPPLY
SUPPLY
SUPPLY
VS
GND
CREF
TREBLE-L
D01AU1261
I2C BUS DECODER + LATCHES
SCL
SDA
PVS-L
PGND-L
PGND-R
PVS-R
OUT-L
OUT-R
220
F
22
F
TREBLE-R
RB
RB
BASSI-R
BASSO-R
x1
x1
TREBLE
VOLUME
VOLUME
+6dB
0dB
+6dB
-63dB
+6dB
0dB
3.3nF
+6dB
-63dB
TREBLE
BASS
BASS
BASS_ALC
CONTROL
HALF_WAVE
RECTIFIER
25K
25K
V
REF
gm
68nF
3.3nF
68nF
68nF
68nF
5.6K
5.6K
16
or
32
16
or
32
220
F
BASSO-L
BASSI-L
25K
25K
gm
IN1-L
0.47
F
BLOCK DIAGRAM TDA7469A (SO20)
IN1-R
CMUTE
IN2-L
0.47
F
SUPPLY
SUPPLY
SUPPLY
VS
GND
CREF
D01AU1262
I2C BUS DECODER + LATCHES
SCL
SDA
PVS-L
PGND-L
PGND-R
PVS-R
OUT-L
OUT-R
220
F
22
F
x1
x1
0.47
F
VOLUME
VOLUME
SOFTMUTE
+6dB
0dB
+6dB
-63dB
+6dB
0dB
+6dB
-63dB
25K
25K
V
REF
16
or
32
16
or
32
220
F
IN2-R
0.47
F
0.47
F
25K
25K
25K
25K
25K
25K
IN1-L
0.47
F
BLOCK DIAGRAM TDA7469D (SO16)
TDA7469
2/17
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
S
Operating Supply Voltage
5.5
V
T
amb
Operating Ambient Temperature
-10 to 85
C
T
stg
Storage Temperature Range
-55 to 150
C
THERMAL DATA
Symbol
Parameter
Value
Unit
R
th j-pin
Thermal Resistance Junction-pins
85
C/W
PIN CONNECTIONS
QUICK REFERENCE DATA
Symbol
Parameter
Min.
Typ.
Max.
Unit
V
S
Supply Voltage
1.8
2.4
5.0
V
V
ps
Power Supply Voltage
1.5
2.4
5.0
V
P
omax
Maximum output power
5
8
mW
THD
Total Harmonic Distortion V = 0.1Vrms f = 1KHz
0.1
0.5
%
Volume Control (1dB step)
-63
6
dB
Treble Control
0
12
dB
Bass Control
0
14
dB
Mute Attenuation
90
dB
VS
IN1-L
IN2-L
PGND-L
OUT-L
SDA
PVS-L
SCL
GND
CMUTE
OUT-R
PVS-R
PGND-R
IN2-R
IN1-R
CREF
1
3
2
4
5
6
7
8
14
13
12
11
10
9
15
16
D00AU1236
VS
IN1-L
TREBLE-L
BASSI-L
BASSO-L
OUT-L
PGND-L
PVS-L
SDA
ALC
PVS-R
OUT-R
BASSO-R
PGND-R
BASSI-R
TREBLE-R
IN1-R
CREF
1
3
2
4
5
6
7
8
9
18
17
16
15
14
12
13
11
19
10
20
SCL
GND
D00AU1235
SO16
SO20
V
S
IN1-L
IN2-L
MUX-L
TREBLE-L
BASSO-L
BASSI-L
PGND-L
OUT-L
OUT-R
PGND-R
BASSO-R
TREBLE-R
BASSI-R
MUX-R
IN2-R
IN1-R
CREF
1
3
2
4
5
6
7
8
9
22
21
20
19
18
16
17
15
23
10
24
PVS-L
PVS-R
D01AU1246
SDA
ALC
11
14
13
12
SCL
GND
SSO24
TDA7469
3/17
ELECTRICAL CHARACTERISTICS (refer to the test circuit T
amb
= 25C, V
S
=2.4V, all controls flat
(G = 0dB), f = 1KHz, unless otherwise specified)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
SUPPLY
V
S
Supply Voltage
1.8
2.4
5.0
V
V
PS
Supply Voltage
1.5
2.4
5.0
V
I
SQ
Supply Current
10
A
I
PSQ
Quiscent Current
1
A
I
S
Po = 0.5mW +0.5mW
8
mA
I
PS
Po = 0.5mW +0.5mW
15
mA
INPUT STAGE
R
IN
Input Resistance
35
50
65
K
A
IN
Input Attenuation Range
0
6
dB
VOLUME CONTROL
C
RANGE
Control Range
-63
6
dB
A
MAX
Max. Attenuation
61
63
65
dB
A
STEP
Step Resolution
0.5
1
1.5
dB
G
MAX
Max. Gain
6
dB
Gstep
Step Resolution
2
dB
R1
Muxout Load Resistence
10
K
BASS CONTROL
Gb
Control Range
Max. Boost/on
14
dB
R
B
Internal Feedback Resistance
75.6
100.8
126
K
TREBLE CONTROL
Gt
Control Range
Max. Boost
12
dB
Rt
Internal Resistance
25
K
HEADPHONE OUTPUTS
Gout
Output Gain
0
dB
Pomax
Max Output Power
THD = 10%
5
8
mW
GENERAL
E
NO
Output Noise
Outout Muted
All gains = 0dB;
BW = 20Hz to 20KHz flat
5
10
V
V
THD
Distortion
Av = 0, V
in
= 0.1V
rms
0.1
0.5
%
S
C
Channel Separation Left/Right
50
dB
RR1
Ripple Rejection
V
S
, f = 100Hz
-70
dB
RR2
Ripple Rejection
PVS, f = 100Hz
-75
dB
Total Tracking Error
0
1
dB
BUS INPUTS
V
IL
Input Low Voltage
0.5
V
V
IH
Input High Voltage
1.9
V
I
IN
Input Current
V
IN
= 0.4V
-5
5
A
V
O
Output Voltage (ACK)
I
O
= 1.6mA
0.4
V
NOTE1:
1) BASS and TREBLE response: The center frequency and the response quality can be chosen by the external circuitry.
TDA7469
4/17
DATA BYTES
Address = (HEX) 10001000
FUNCTION SELECTION:
The first byte (subaddress)
MSB
LSB
SUBADDRESS
D7
D6
D5
D4
D3
D2
D1
D0
X
X
X
B
0
0
0
0
VOLUME
X
X
X
B
0
0
0
1
TREBLE & BASS
X
X
X
B
0
0
1
0
INPUT & MUTE
X
X
X
B
0
0
1
1
STAND-BY & OTHERS
X
X
X
B
0
1
0
0
BASS ALC
X
X
X
B
0
1
0
1
BASS ALC
B = 1 incremental bus; active
B = 0 no incremental bus;
X = indifferent 0,1
MSB
LSB
VOLUME
D7
D6
D5
D4
D3
D2
D1
D0
GAIN
0
0
6
0
1
4
1
0
2
1
1
0
1 dB STEPS
0
0
0
0
0
0
1
-1
0
1
0
-2
0
1
1
-3
1
0
0
-4
1
0
1
-5
1
1
0
-6
1
1
1
-7
8 dB STEPS
0
0
0
0
0
0
1
-8
0
1
0
-16
0
1
1
-24
1
0
0
-32
1
0
1
-40
1
1
0
-48
1
1
1
-56
VOLUME : +6 x -63dB
VOLUME
TDA7469
5/17
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