TDA7468
4/23
ELECTRICAL CHARACTERISTICS
(refer to the test circuit T
amb
= 25°C, V
S
= 9V, f = 1KHz all controls flat (G = 0dB), unless otherwise
specified)
Symbol Parameter Test Condition Min. Typ. Max. Unit
SUPPLY
V
S
Supply Voltage 5 9 10 V
I
S
Supply Current 9 mA
SVR Ripple Rejection 60 90 dB
INPUT STAGE
R
IN
Input Resistance 35 50 65 K
V
CL
Clipping Level THD = 0.3% 2 2.5
Vrms
S
IN
Input Separation 80 100 dB
G
inmin
Minimum Input Gain -1 0 1 dB
G
inmax
Maximum Input Gain 14 dB
G
step
Step Resolution 2 dB
MIC
R
IN
Input Resistance 35 50 65 K
G
mic1
Mic Input Gain 1 14 dB
G
mic2
Mic Input Gain 2 10 dB
G
mic3
Mic Input Gain 3 6 dB
G
min4
Mic Input Gain 4 0 dB
MIX
mic
Mixing Rate 50 %
SURROUND
R
in
Input Resistance 35 50 65 K
G
inmin
Minimum Input Gain -1 0 1 dB
G
inmax
Maximum Input Gain 12 dB
G
inV
Inverting Gain -1
M
ixmin
Minimum Mixing Rate 0 %
M
ixmax
Maximum Mixing Rate 100 %
Crosstal
k
Crosstalk of Mux Output to 100%
IS
40 dB
G
buffer
Buffer Gain 6dB
VOLUME CONTROL
C
RANGE1
Vol 1 Control Range 63 dB
A
VMAX1
Vol 1 Max. Attenuation 61 63 65 dB
A
STEP1
Vol 1 Step Resolution 0.5 1 1.5 dB
Match1 Matching TBD dB
C
RANGE2
Vol 2 Control Range 24 dB
A
VMAX2
Vol 2 Max. Attenuation 22 24 26 dB
A
STEP2
Vol 2 Step Resolution 7 8 9 dB
Match2 Matching TBD dB
A
VMAX1
+
A
VMAX2
Vol 1 + Vol 2 Max Attenuation 84 dB
5/23
TDA7468
BASS CONTROL
Gb Control Range Max. Boost/cut ±12.0 ±14.0 ±16.0 dB
B
STEP
Step Resolution 1 2 3 dB
R
B
Internal Feedback Resistance 33 44 55 K
BASS ALC CONTROL
R
attack1
Attack Time Resistor 1 12.5 K
R
attack2
Attack Time Resistor 2 25 K
R
attack3
Attack Time Resistor 3 50 K
R
attack4
Attack Time Resistor 4 100 K
Thresh1 Threshold 1 700 mVrms
Thresh2 Threshold 2 485 mVrms
Thresh3 Threshold 3 320 mVrms
Thresh4 Threshold 4 170 mVrms
TREBLE CONTROL
Gt Control Range Max. Boost/cut +13.0 +14.0 +15.0 dB
T
STEP
Step Resolution 1 2 3 dB
R
t
Internal Resistance 25 K
AUDIO OUTPUTS
V
OCL
Clipping Level THD = 0.3% 2 2.5
Vrms
R
L
Output Load Resistance 2 K
VO
UT
DC Voltage Level 4.5 V
GENERAL
E
NO
Output Noise BW = 20Hz to 20KHz;
All gains 0dB;
output muted 5 µV
flat 10 15 µV
S/N Signal to Noise Ratio
All gains 0dB
; V
O
= 1V
rms
;
100 dB
S
C
Channel Separation Left/Right 90 dB
dDistortion A
V
= 0; V
I
= 0.1V
rms
; 0.1 %
A
V
= 0; V
I
= 1V
rms
; 0.01 %
S
C
Channel Separation left/right 90 dB
Total Tracking Error 0 1 dB
BUS INPUT
V
IL
Input Low Voltage 1V
V
IH
Input High Voltage 2.5 V
I
IN
Input Current V
IN
= 0.4V -5 5 µA
V
O
Output Voltage (ACK) I
O
= 1.6mA 0.4 0.8 V
ELECTRICAL CHARACTERISTICS (continua)
(refer to the test circuit T
amb
= 25°C, V
S
= 9V, f = 1KHz all controls flat (G = 0dB), unless otherwise
specified)
Symbol Parameter Test Condition Min. Typ. Max. Unit
TDA7468
6/23
Figure 4. TEST CIRCUIT
IN-R3
ALC
0.47µF
0.47µF
0.47µF
SUPPLY
V
S
GND CREFTREBLE-L
MUX-L IS-L
D99AU1059A
I
2
C BUS DECODER + LATCHES
SCL
SDA
OUT-L
OUT-R
10µF
+
+
+
TREBLE-R
MUX-R
BASSI-R
IS-R
3.3nF
100nF 100nF
5.6K
BASSO-R
50K
50K
50K
1M
TREBLE
gm
gm
buffer gain:
0 to 14dB gain
/ 2dB step
63dB att.
/1dB step
+ 6dB gain
-14 to +14dB
/2dB step
-14 to +14dB
/2dB step
-14 to +14dB
/2dB step
-14 to +14dB
/2dB step
-24 att.
/8dB step
-24 att.
/8dB step
63dB att.
/1dB step
+ 6dB gain
0dB
6dB
9dB
12dB
0dB
6dB
9dB
12dB
non-inverting
inverting
VARIABLE
MIX
VARIABLE
MIX
non-inverting
inverting
0dB, 6dB
10dB, 14dB
INPUT
SELECT
TREBLE
BASS
BASS
BASS_ALC
CONTROL
HALF_WAVE
RECTIFIER
IN-R2
IN-R4
23
24
25
26
2
16
0.47µF
50K
50K
V
REF
BASSO-LBASSI-L
0.47µF
0.47µF
IN-R1
50K
50K
IN-L2
0.47µF
0.47µF
50K
buffer gain:
0 to 14dB gain
/ 2dB step
INPUT
SELECT
IN-L3
IN-L1
3
4
5
6
78 9 10 11 2827
1
DGND
13
12
15
14
17
18192021
22
0.47µF
MIC-MIX
50K
50K
0.47µF
IN-L4
50K
+
+

TDA7468D13TR

Mfr. #:
Manufacturer:
STMicroelectronics
Description:
Multimedia Misc 2 Bands Digitally Controled Audio Proc
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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