TA8721ASN
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TA8721ASN
DUAL SIF SYSTEM FOR TV
FEATURES
l
Two channel SIF circuit (The 2ch demodulation circuit can be
configured in combination with the TA8712N or TA8796N.)
l
Three stage limiter amplifier
l
Quadrature type detection circuit
l
No-adjustment type FM detector circuit by ceramic
discriminator
BLOCK DIAGRAM
Weight : 0.71g (Typ.)
000707EBA1
·
TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general
can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the
buyer, when utilizing TOSHIBA products, to comply with the standards of safety in making a safe design for the entire system, and
to avoid situations in which a malfunction or failure of such TOSHIBA products could cause loss of human life, bodily injury or
damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as set forth in the
most recent TOSHIBA products specifications. Also, please keep in mind the precautions and conditions set forth in the “Handling
Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability Handbook” etc..
·
The TOSHIBA products listed in this document are intended for usage in general electronics applications (computer, personal
equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These TOSHIBA products are
neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or
failure of which may cause loss of human life or bodily injury (“Unintended Usage”). Unintended Usage include atomic energy
control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control
instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this document
shall be made at the customer’s own risk.
·
The products described in this document are subject to the foreign exchange and foreign trade laws.
·
The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by
TOSHIBA CORPORATION for any infringements of intellectual property or other rights of the third parties which may result from its
use. No license is granted by implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or
others.
·
The information contained herein is subject to change without notice.
2001-02-06
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TA8721ASN
TERMINAL FUNCTION
PIN
No.
PIN NAME
FUNCTION
INTERFACE CIRCUIT
1
Limiter Input (1)
A sound carrier is input from SAW filter.
2
5
De-Emphasis (1)
Sound Output (1)
The De-Emphasis time constant is defined
by external capacitor.
This is an FM detector circuit output
terminal.
3
4
Limiter Output (1)
SoundDetection(1)
This is a connection terminal of sound
detection coil.
This will be of no-adjustment type by using
ceramic discriminator.
A sound muting will be performed by
connecting pin 4 to GND.
6
SIF GND
Connect a bypass capacitor between this
pin and SIF V
CC
of pin 12.
―
2001-02-06
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TA8721ASN
PIN
No.
PIN NAME
FUNCTION
INTERFACE CIRCUIT
7
10
Sound Output (2)
De-Emphasis (2)
This is an FM detector circuit output
terminal.
The De-Emphasis time constant is
defined by external capacitor.
8
9
Sound Detection (2)
Limiter Output (2)
This is a connection terminal of sound
detection coil.
This will be of no-adjustment type by
means of ceramic discriminator.
A sound muting will be performed by
connecting pin 8 to GND.
11
Limiter Input (2)
A sound carrier is input from the SAW
filter.
12
SIF V
CC
Connect a bypass capacitor between this
pin and SIF GND of pin 6.
―
2001-02-06
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TA8721ASN
MAXIMUM RATINGS
(Ta=25°C)
CHARACTERISTIC
Supply Voltage
Power Dissipation
Operating Temperature
Storage Temperature
SYMBOL
V
CC
P
D
(Note)
T
opr
T
stg
RATING
15
890
−20~75
−55~150
UNIT
V
mW
°C
°C
Note:
When using the device at above Ta=25°C, decrease the power dissipation by 7.14mW for each increase of
1°C.
RECOMMENDED SUPPLY VOLTAGE
PIN
No.
12
PIN NAME
V
CC
MIN.
8.1
TYP.
9.0
MAX.
9.9
UNIT
V
ELECTRICAL CHARACTERISTICS
DC CHARACTERISTICS
(Unless otherwise specified V
CC
=9V, Ta=25°C)
CHARACTERISTIC
Supply Voltage
SYMBOL
I
CC
V
1
V
2
V
3
V
4
Terminal Voltage
V
5
V
7
V
8
V
9
V
10
V
11
1
TEST
CIR-
CUIT
1
TEST CONDITION
―
―
―
―
―
―
―
―
―
―
―
MIN.
13
2.7
4.1
2.7
2.3
3.5
3.5
2.3
2.7
4.1
2.7
TYP.
18
3.0
5.1
3.7
2.9
4.5
4.5
2.9
3.7
5.1
3.0
MAX.
23
3.3
6.1
4.7
3.6
5.5
5.5
3.6
4.7
6.1
3.3
V
UNIT
mA
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TA8721ASN
AC CHARACTERISTICS
(When using the specified coil unless otherwise specified, V
CC
=9V, Ta=25°C)
CHARACTERISTIC
Audio Frequency Output
Level
(Note 1)
Audio Frequency
Distortion Rate
Limiting Sensitivity
(Note 3)
AMR
Audio Frequency
Bandwidth
(Note 4)
(Note 2)
SYMBOL
V
OD1
V
OD2
THD1
THD2
V
LIM1
V
LIM2
AMR1
AMR2
AF
BW1
(Note 5)
AF
BW2
S / N1
S / N Ratio
(Note 6)
S / N2
CR1
2
CR2
Ri1, Ri2
2
2
TEST
CIR-
CUIT
2
2
2
2
2
TEST CONDITION
f
o
=4.5MHz, V
i
=100dBµV
f
o
=4.724MHz, V
i
=100dBµV
f
o
=4.5MHz
f
o
=4.724MHz
When output V
OD1
is
−3dB.
When output V
OD2
is
−3dB.
f
o
=4.5MHz, AM=30%
f
o
=4.724MHz, AM=30%
−3dB
bandwidth
−3dB
bandwidth
f
o
=4.5MHz,
CW against FM 25kHz / dev
f
o
=4.724MHz,
CW against FM 25kHz / dev
SIF1 f
o
=4.5MHz, f
m
=400Hz
SIF2 f
o
=4.724MHz, CW
SIF1 f
o
=4.5MHz, CW
SIF2 f
o
=4.724MHz, fm=400Hz
―
MIN.
350
350
―
―
―
―
40
40
±70
±70
60
60
60
60
0.75
TYP.
500
500
0.2
0.2
―
―
50
50
―
―
―
―
―
―
1.0
MAX.
700
700
1.0
1.0
50
50
―
―
―
―
―
dB
―
―
dB
―
1.25
kΩ
UNIT
mV
rms
%
dBµV
dB
kHz
Crosstalk Between Sound
Outputs
(Note 7)
Limiter Input Resistance
(Note 8)
TEST CONDITION
Note 1:
Audio Frequency Output Level
Limiter input
V
OD1
: f
o
=4.5MHz, 100dBµV, f
m
=400Hz, 100% (25kHz / dev) FM modulation
V
OD2
: f
o
=4.724MHz, 100dBµV, f
m
=400Hz, 100% (25kHz / dev) FM modulation
After the above input, measure the output level of sound output.
Audio Frequency Distortion Rate
Measure the distortion rate of sound output by distortion meter under the condition of Note 1.
Limiting Sensitivity
Limiter input
V
LIM1
: f
o
=4.5MHz, variable level, f
m
=400Hz, 100% (25kHz / dev) FM modulation
V
LIM2
: f
o
=4.724MHz, variable level, f
m
=400Hz, 100% (25kHz / dev) FM modulation
After the above input, measure the output level of sound output. Measure the input level of Note 1
output level at
−3dB.
Note 2:
Note 3:
2001-02-06
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NXP MCU
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