STMICROELECTRONICS TDA7273

TDA7273
SINGLE CHIP STEREO CASSETTE PLAYBACK SYSTEM
WIDE OPERATING SUPPLY VOLTAGE
(1.8V to 7V)
INPUT COUPLING WITHOUT CAPACITORS
BUILT-IN DC STEREO VOLUME CONTROL
BUILT-IN RIPPLE FILTERS
LOW QUIESCENT CURRENT
NO EXTERNAL BOUCHEROT CELL
MAX OUTPUT CURRENT 70mA PEAK
DESCRIPTION
The TDA7273 is a monolithic integrated circuit
designed for portable cassette players market.
It comprises preamplifiers, DC volume control,
and headphone drivers.
DIP16
SO16
ORDERING NUMBERS:
TDA7273
TDA7273D
BLOCK DIAGRAM
May 1997
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TDA7273
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
VS
Supply Voltage
Io
Output Current (max)
Top
Tstg , Tj
Test Conditions
Unit
9
V
70
mA
-20 to 70
°C
-40 to +150
°C
Operating Temperature Range
Storage & Junction Temperature Range
THERMAL DATA
Symbol
Rthj-amb
Description
Thermal Resistance Junction-ambient
Max
DIP-16
SO-16
Unit
100
200
°C/W
DC CHARACTERISTICS: Tamb = 25°C; VS = 3V; RL = 10KΩ (Preamplifier), RL = 32Ω (Headphone);
VIN = 0; VOL control = Vref
Terminal No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Terminal Voltage (V)
0
1.5
1.5
1.5
1.5
2.7
1.5
0
3
1.5
1.5
1.5
1.5
1.5
1.5
1.5
TEST CIRCUIT
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TDA7273
PIN CONNECTION (Top view)
ELECTRICAL CHARACTERISTICS (Tamb = 25°C, VS = 3V, f = 1KHz, RL = 32Ω Vol. control = 2/3Vref
unless otherwise specified)
Symbol
Parameter
VS
Supply Voltage
Id
Quiescent Current
Vref
Reference Voltage
Test Condition
Min.
Typ.
1.8
1.3
Max.
Unit
7
V
14
20
mA
1.49
1.7
V
PREAMPLIFIER SECTION
GVO
Open Loop Gain
GV
Close Loop Gain
Vo
Output Voltage
Ib
Bias Current
70
THD = 1%
dB
30
33
600
850
mV
3
µA
%
Total Harmonic Distortion
Vo = 330mVrms
Cross Talk
Rg = 2.2KΩ; Vo = 330mVrms
74
dB
EN
Output Noise
Rg = 2.2KΩ; BW = 22Hz to 22KHz
100
µV
Ripple Rejection
R g = 2.2KΩ VR = 100mVrms
f = 100Hz; CSVR = 100µF
40
50
dB
1.50
V
15
30
mW
28
31
34
0.2
1
SVR
0.25
dB
Ct
THD
0.05
35
HEADPHONE DRIVER
Vo(DC)
DC Output Voltage
Po
Output Power
THD = 10%;
Po
Transient Output Power
THD = 10% RL = 16Ω
GV
Close Loop Gain
Po = 5mW
THD
Ct
SVR
Total Harmonic Distortion
Po = 5mW
Cross Talk
Rg = 10KΩ; Po = 5mW
Ripple Rejection
Vr = 100mVrms, f = 100Hz
Vol. control = 1/3V ref
C SVR = 100µF; Rg =600Ω
Volume Control Range
50
40
66
mW
dB
%
50
dB
47
dB
75
dB
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TDA7273
Figure 1: Application Circuit
Figure 2: P.C. Board and Component Layout of the Circuit of Figure 1 (1:1 scale)
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TDA7273
Figure 3: Supply Current vs. Supply Voltage
(Preamplifier + Driver)
Figure 4: Vref, vs. Supply Voltage (pin 16)
Figure 5: Closed Loop Gain vs. Frequency
(VS = 3V) (PREAMPLIFIER)
Figure 6: THD vs. Frequency (VS = 3V,
Vo =330mVrms, RL = 10KΩ)
(PREAMPLIFIER)
Figure 7: SVR vs. Frequency (PREAMPLIFIER)
Figure 8: Quiescent Output Voltage vs. Supply
Voltage (DRIVER)
VS = 3V
Rg = 2.2KΩ
VR = 100mVrms
CSVR = 100µF
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TDA7273
Figure 9: Closed Loop Gain vs Frequency
(DRIVER)
(VS = 3V, RL = 32Ω)
Figure 10: Output Power vs. Supply Voltage
(Vol = 2/3Vref, RL = 32Ω, THD = 10%,
f = 1KHz) (DRIVER)
Figure 11: THD vs. Output Power (Vo = 2/3Vref,
VS = 3V, RL = 32Ω, f = 1KHz)
(DRIVER)
Figure 12: THD vs. Frequency (Po = 5mW, VS =
3V RL = 32Ω) (DRIVER)
Figure 13: SVR vs. Frequency VS = 3V (RL =
32Ω, Vr = 100Vrms Rg = 600Ω,
CSVR = 100mV) (DRIVER)
Figure 14: Volume Control (0dB = 10mW,
VS = 3V Rvol = 50KΩ, RL = 32Ω,
f = 1KHz) vs. Volume Setting (DRIVER)
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TDA7273
DIP16 PACKAGE MECHANICAL DATA
mm
DIM.
MIN.
a1
0.51
B
0.77
TYP.
inch
MAX.
MIN.
TYP.
MAX.
0.020
1.65
0.030
0.065
b
0.5
0.020
b1
0.25
0.010
D
20
0.787
E
8.5
0.335
e
2.54
0.100
e3
17.78
0.700
F
7.1
0.280
I
5.1
0.201
L
Z
3.3
0.130
1.27
0.050
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TDA7273
SO16 PACKAGE MECHANICAL DATA
mm
DIM.
MIN.
TYP.
A
a1
inch
MAX.
TYP.
2.65
0.1
MAX.
0.104
0.2
a2
0.004
0.012
2.45
0.096
b
0.35
0.49
0.014
0.019
b1
0.23
0.32
0.009
0.013
C
0.5
0.020
c1
45° (typ.)
D
10.1
10.5
0.398
0.413
E
10.0
10.65
0.394
0.419
e
1.27
0.050
e3
8.89
0.350
F
7.4
7.6
0.291
0.299
L
0.5
1.27
0.020
0.050
M
S
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MIN.
0.75
0.030
8° (max.)
TDA7273
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specification mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGSTHOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectronics.
 1997 SGS-THOMSON Microelectronics – Printed in Italy – All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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