TDA7273
SINGLE CHIP STEREO CASSETTE PLAYBACK SYSTEM
WIDEOPERATINGSUPPLY VOLTAGE
(1.8V to 7V)
INPUTCOUPLINGWITHOUTCAPACITORS
BUILT-INDC STEREOVOLUMECONTROL
BUILT-INRIPPLE FILTERS
LOW QUIESCENTCURRENT
NO EXTERNAL BOUCHEROTCELL
MAX OUTPUT CURRENT70mA PEAK
DESCRIPTION
The TDA7273 is a monolithic integrated circuit
designed for portablecassette players market.
It comprises preamplifiers, DC volume control,
and headphonedrivers.
BLOCK DIAGRAM
DIP16 SO16
ORDERING NUMBERS:
TDA7273 TDA7273D
May 1997
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TDA7273
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Test Conditions Unit
V
I
o
T
op
T
stg,Tj
THERMAL DATA
Symbol Description DIP-16 SO-16 Unit
R
thj-amb
Supply Voltage 9 V
S
Output Current (max) 70 mA
Operating Temperature Range -20 to 70 °C
Storage & Junction Temperature Range -40 to +150
Thermal Resistance Junction-ambient Max 100 200
°
C/W
°
C
DC CHARACTERISTICS: T
V
=0;VOLcontrol= V
IN
Terminal No
Terminal Voltage (V)
ref
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
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
=25°C; VS= 3V; RL= 10KΩ (Preamplifier),RL=32Ω(Headphone);
amb
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TDA7273
PIN CONNECTION
(Topview)
ELECTRICAL CHARACTERISTICS
unless otherwise specified)
=25°C, VS= 3V, f = 1KHz, RL=32ΩVol. control = 2/3V
(T
amb
ref
Symbol Parameter Test Condition Min. Typ. Max. Unit
V
S
I
d
Supply Voltage 1.8 7 V
Quiescent Current 14 20 mA
Vref Reference Voltage 1.3 1.49 1.7 V
PREAMPLIFIERSECTION
G
VO
G
V
V
o
I
b
THD Total Harmonic Distortion V
C
t
E
N
SVR Ripple Rejection R
Open Loop Gain 70 dB
Close Loop Gain 30 33 35 dB
Output Voltage THD = 1% 600 850 mV
Bias Current 3 µA
= 330mVrms 0.05 0.25 %
o
Cross Talk Rg = 2.2KΩ;Vo= 330mVrms 74 dB
Output Noise Rg= 2.2KΩ;BW = 22Hzto22KHz 100
= 2.2KΩ VR= 100mVrms
g
f = 100Hz; C
SVR
= 100µF
40 50 dB
HEADPHONEDRIVER
V
o(DC)
P
o
P
o
G
V
THD Total Harmonic Distortion P
C
t
SVR Ripple Rejection V
DC Output Voltage 1.50 V
Output Power THD= 10%; 15 30 mW
Transient Output Power THD = 10% RL = 16Ω 50 mW
Close Loop Gain Po= 5mW 28 31 34 dB
= 5mW 0.2 1 %
o
Cross Talk Rg = 10KΩ;Po= 5mW 40 50 dB
= 100mVrms, f = 100Hz
r
Vol. control = 1/3V
C
= 100µF; Rg=600
SVR
ref
Ω
47 dB
Volume Control Range 66 75 dB
V
µ
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TDA7273
Figure 1:
ApplicationCircuit
Figure 2:
P.C.Board and ComponentLayout of the Circuit of Figure1 (1:1 scale)
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TDA7273
Figure 3:
SupplyCurrent vs. Supply Voltage
(Preamplifier + Driver)
Figure 5: ClosedLoop Gain vs. Frequency
= 3V) (PREAMPLIFIER)
(V
S
Figure4:
Figure6:
, vs. Supply Voltage (pin 16)
V
ref
THDvs. Frequency(V
=330mVrms, RL=10KΩ)
V
o
S
(PREAMPLIFIER)
= 3V,
Figure 7: SVR vs. Frequency (PREAMPLIFIER)
VS=3V
= 2.2KΩ
R
g
= 100mVrms
V
R
C
= 100µF
SVR
Figure8:
QuiescentOutputVoltagevs. Supply
Voltage(DRIVER)
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TDA7273
Figure 9:
ClosedLoop Gain vs Frequency
= 3V, RL=32Ω) (DRIVER)
(V
S
Figure 11: THD vs. Output Power (V
= 3V, RL=32Ω, f = 1KHz)
V
S
(DRIVER)
= 2/3V
o
ref
Figure10:
OutputPower vs. Supply Voltage
(Vol = 2/3V
=32Ω, THD = 10%,
ref,RL
f = 1KHz) (DRIVER)
,
Figure12:
THD vs. Frequency(P
=32Ω) (DRIVER)
3V R
L
= 5mW,VS=
o
Figure 13:
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SVRvs. FrequencyV
32Ω,V
C
= 100Vrms Rg=600Ω,
r
= 100mV) (DRIVER)
SVR
=3V(RL=
S
Figure14:
VolumeControl(0dB = 10mW,
V
S
=3VR
=50KΩ,RL=32Ω,
vol
f = 1KHz)vs. VolumeSetting(DRIVER)
DIP16 PACKAGE MECHANICAL DATA
TDA7273
DIM.
MIN. TYP. MAX. MIN. TYP. MAX.
a1 0.51 0.020
B 0.77 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 3.3 0.130
Z 1.27 0.050
mm inch
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TDA7273
SO16 PACKAGEMECHANICAL DATA
DIM.
MIN. TYP. MAX. MIN. TYP. MAX.
A 2.65 0.104
a1 0.1 0.2 0.004 0.012
a2 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 0.75 0.030
S8°(max.)
mm inch
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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 partieswhich 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.
1997SGS-THOMSON Microelectronics – Printed in Italy – All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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