SGS Thomson Microelectronics TDA7309D, TDA7309 Datasheet
DIGITAL CONTROLLEDSTEREO AUDIO PROCESSOR
INPUTMULTIPLEXER:
3 STEREOINPUTS
RECORDOUTPUTFUNCTION
LOUDNESSFUNCTION
VOLUMECONTROL IN 1dB STEPS
INDEPENDENT LEFT AND RIGHT VOLUME
CONTROL
SOFTMUTEFUNCTION
ALL FUNCTIONS PROGRAMMABLE VIA SE-
2
RIAL I
DESCRIPTION
The TDA7309 is a control processor with independent left and right volume control for quality
audio applications. Selectable external loudness
and softmute functions are provided.
Control is accomplished by serial I
processorinterface.
The AC signal setting is obtained by resistor net-
C BUS
2
C bus micro-
TDA7309
WITH LOUDNESS
DIP20 SO20
ORDERING NUMBER:
TDA7309 TDA7309D
works and switches combined with operational
amplifiers.
Thanks to the used BIPOLAR/CMOSTechnology,
Low Distortion, Low Noise and Low DC stepping
are obtained.
BLOCK DIAGRAM
x
3
2.2µF
LEFT
INPUTS
x
3
2.2µF
RIGHT
INPUTS
17
18
20
14
13
11
INPUT
SELECTOR
SUPPLY
16 7 15
AGNDV
S
CREF
Recout(L)
1
TDA7309
10
Recout(R)
22µF
LOUD(L)
VOLUME
LOUDNESS
VOLUME
LOUDNESS
LOUD(R)
100nF
19
+
+
12
100nF
SOFT
MUTE
MUTE
MUTE
2
6
4
5
8
3 CSM
9
D93AU045A
OUT
LEFT
DIGGND
SDA
SCL
ADDR
OUT
RIGHT
BUSSERIAL BUS DECODER+ LATCHES
September 1997
1/12
TDA7309
PIN CONNECTION
(Top View)
RecoutL
OUTL
CSM
SDA
SCL
DGND
GND
ADD
OUTR
1
2
3
4
5
6
7
8
9 LOUDR
19
18
17
16
15
14
13
12
IN3L20
LOUDL
IN2L
IN1L
V
S
CREF
IN1R
IN2R
RecoutR 10 IN3R11
D94AU058A
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
V
S
T
amb
T
stg
Operating Supply Voltage 10.5 V
Operating Ambient Temperature –40 to85 °C
Storage Temperature Range –55 to +150 °C
QUICK REFERENCE DATA
Symbol Parameter Test Condition Min. Typ. Max. Unit
V
S
V
CL
Operating Supply Voltage 6 10 V
Max. Input SignalHandling 2 Vrms
THD Total Harmonic Distortion V = 1Vrms, f= 1KHz 0.01 0.1 %
S/N Signal to Noise Ratio 106 dB
Sc Channel Separation f = 1KHz 100 dB
Volume Control 1.0dB step –95 0 dB
Soft Mute Attenuation 60 dB
Direct Mute Attenuation 100 dB
TEST CIRCUIT
IN1L
IN2L
IN3L
RecoutL
IN1R
IN2R
IN3R
RecoutR
17
18
20
1
TDA7309
14
13
101119 12 5 4 6
LL LR
SCL SDA DIGGND
CSM
3
2
OUTL
16
V
S
15 CREF
AGND7
OUTR9
8
ADD
2/12
D94AU057A
THERMAL DATA
Symbol Parameter SO20 DIP20 Unit
R
th j-pins
Thermal resistanceJunction to Pins 150 100
TDA7309
C/W
°
ELECTRICALCHARACTERISTICS (Refer to the test circuit, T
=50Ω, all controls flat (G = 0), f = 1KHzunless otherwisespecified.)
R
G
=25°C, VS= 9V, RL= 10KΩ,
amb
Symbol Parameter Test Condition Min. Typ. Max. Unit
SUPPLY
V
S
I
S
SVR Ripple Rejection 60 85 dB
Supply Voltage 5 (*) 9 10 V
Supply Current 7 10 mA
INPUT SELECTORS
R
S
in
Input Resistance 35 50 65 KΩ
I
Input Separation 80 90 dB
VOLUMECONTROL
C
RANGE
A
VMAX
A
STEP
E
A
E
T
V
DC
A
mute
Control Range 92 dB
Max. Attenuation 87 92 95 dB
Step resolution 0.5 1 1.5 dB
Attenuation Set Error AV= 0to -24dB -1.2 1.2 dB
A
= -24to -56dB -3 2 dB
V
Tracking Error 2dB
DC Steps adjacent attenuationsteps 0 3 mV
from 0dB to A
max. 0.5 5 mV
V
Output Mute Attenuation 80 100 dB
SOFT MUTE
T
d
Delay Time C
= 22nF 0 to –20dB
smute
Fast Mode
Slow Mode
1
20
AUDIO OUTPUTS
ms
ms
V
R
R
V
CLIP
L
out
DC
Clipping Level d = 0.3% 2 2.6 Vrms
Output Load Resistance 2 KΩ
Output Impedance 100 200 300 Ω
DC Voltage Level 3.8 V
GENERAL
e
NO
Et Total Tracking Error A
S/N Signal to Noise Ratio all gains = 0dB; V
d Distortion 0.01 0.1 %
S
C
Output Noise BW = 20-20KHz, flat
output muted
all gains = 0dB
2.5
515
A curve allgains = 0dB 3 µV
= 0to –24dB
V
A
= -24to –56dB
V
= 1Vrms 95 106 dB
O
0
0
Channel Separation 80 100 dB
BUS INPUTS
V
IL
V
IH
I
IN
V
O
(*) Hedevice work until 5V but noguarantee about SVR
Input Low Voltage 1V
Input High Voltage 3 V
Input Current Vin= 0.4V -5 +5
Output Voltage SDA
IO= 1.6mA 0.4 0.8 V
Acknowledge
µV
V
µ
1
2
dB
dB
µ
A
3/12
TDA7309
Figure 1:
Noisevs. volumesetting.
Figure 3: THD vs. frequency
Figure2: SVRR vs. frequency.
Figure4: THD vs. R
LOAD
.
Figure 5:
4/12
Channelseparationvs. frequency.
Figure6:
Outputclip level vs.Supply Voltage.
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