TA8721ASN_01 [TOSHIBA]
DUAL SIF SYSTEM FOR TV; 双SIF SYSTEM FOR电视
| 型号： | TA8721ASN_01 |
| 厂家： | 
TOSHIBA |
| 描述： | DUAL SIF SYSTEM FOR TV |
| 文件： | 总9页 (文件大小：188K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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
Weight : 0.71g (Typ.)
BLOCK DIAGRAM
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 1/9
TA8721ASN
TERMINAL FUNCTION
PIN
PIN NAME
No.
FUNCTION
INTERFACE CIRCUIT
1
Limiter Input (1)
A sound carrier is input from SAW filter.
The De-Emphasis time constant is defined
by external capacitor.
This is an FM detector circuit output
terminal.
2
5
De-Emphasis (1)
Sound Output (1)
This is a connection terminal of sound
detection coil.
3
4
Limiter Output (1)
SoundDetection(1)
This will be of no-adjustment type by using
ceramic discriminator.
A sound muting will be performed by
connecting pin 4 to GND.
Connect a bypass capacitor between this
6
SIF GND
―
pin and SIF V
of pin 12.
CC
2001-02-06 2/9
TA8721ASN
PIN
No.
PIN NAME
FUNCTION
INTERFACE CIRCUIT
This is an FM detector circuit output
terminal.
The De-Emphasis time constant is
defined by external capacitor.
7
10
Sound Output (2)
De-Emphasis (2)
This is a connection terminal of sound
detection coil.
8
9
Sound Detection (2) This will be of no-adjustment type by
Limiter Output (2)
means of ceramic discriminator.
A sound muting will be performed by
connecting pin 8 to GND.
A sound carrier is input from the SAW
filter.
11
12
Limiter Input (2)
Connect a bypass capacitor between this
pin and SIF GND of pin 6.
SIF V
CC
―
2001-02-06 3/9
TA8721ASN
MAXIMUM RATINGS (Ta=25°C)
CHARACTERISTIC
SYMBOL
RATING
UNIT
V
Supply Voltage
15
890
−20~75
−55~150
V
mW
°C
CC
P
(Note)
Power Dissipation
Operating Temperature
Storage Temperature
D
T
opr
T
°C
stg
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
MIN.
8.1
TYP.
9.0
MAX.
9.9
UNIT
V
V
CC
ELECTRICAL CHARACTERISTICS
DC CHARACTERISTICS (Unless otherwise specified V =9V, Ta=25°C)
CC
TEST
CIR-
CHARACTERISTIC
Supply Voltage
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
mA
CUIT
1
I
―
―
―
―
―
―
―
―
―
―
―
13
18
23
CC
V
1
V
2
V
3
V
4
V
5
V
7
V
8
V
9
2.7
4.1
2.7
2.3
3.5
3.5
2.3
2.7
4.1
2.7
3.0
5.1
3.7
2.9
4.5
4.5
2.9
3.7
5.1
3.0
3.3
6.1
4.7
3.6
5.5
5.5
3.6
4.7
6.1
3.3
Terminal Voltage
1
V
V
10
V
11
2001-02-06 4/9
TA8721ASN
AC CHARACTERISTICS
(When using the specified coil unless otherwise specified, V =9V, Ta=25°C)
CC
TEST
CIR-
CHARACTERISTIC
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
CUIT
V
V
THD1
THD2
V
f =4.5MHz, V =100dBµV
Audio Frequency Output
350
350
―
500
500
0.2
0.2
―
700
700
1.0
1.0
50
OD1
o
i
mV
rms
2
2
2
2
2
Level
(Note 1)
f =4.724MHz, V =100dBµV
OD2
o
i
f =4.5MHz
o
f =4.724MHz
o
Audio Frequency
Distortion Rate
%
dBµV
dB
(Note 2)
―
When output V
When output V
is −3dB.
is −3dB.
―
Limiting Sensitivity
LIM1
OD1
OD2
(Note 3)
(Note 4)
V
―
―
50
―
LIM2
f =4.5MHz, AM=30%
o
f =4.724MHz, AM=30%
o
−3dB bandwidth
−3dB bandwidth
AMR1
AMR2
AF
40
40
±70
±70
50
50
AMR
―
―
―
Audio Frequency
Bandwidth
BW1
kHz
(Note 5)
(Note 6)
AF
―
―
BW2
f =4.5MHz,
o
S / N1
S / N2
CR1
60
60
―
―
―
―
1.0
―
CW against FM 25kHz / dev
S / N Ratio
2
dB
f =4.724MHz,
o
―
CW against FM 25kHz / dev
SIF1 f =4.5MHz, f =400Hz
o
m
60
―
SIF2 f =4.724MHz, CW
Crosstalk Between Sound
o
2
2
dB
Outputs
(Note 7)
SIF1 f =4.5MHz, CW
o
CR2
60
―
SIF2 f =4.724MHz, fm=400Hz
o
Limiter Input Resistance
Ri1, Ri2
―
0.75
1.25
kΩ
(Note 8)
TEST CONDITION
Note 1:
Audio Frequency Output Level
Limiter input
V
OD1
V
OD2
: f =4.5MHz, 100dBµV, f =400Hz, 100% (25kHz / dev) FM modulation
o m
: f =4.724MHz, 100dBµV, f =400Hz, 100% (25kHz / dev) FM modulation
o
m
After the above input, measure the output level of sound output.
Audio Frequency Distortion Rate
Note 2:
Note 3:
Measure the distortion rate of sound output by distortion meter under the condition of Note 1.
Limiting Sensitivity
Limiter input
V
V
: f =4.5MHz, variable level, f =400Hz, 100% (25kHz / dev) FM modulation
o m
LIM1
LIM2
: f =4.724MHz, variable level, f =400Hz, 100% (25kHz / dev) FM modulation
o
m
After the above input, measure the output level of sound output. Measure the input level of Note 1
output level at −3dB.
2001-02-06 5/9
TA8721ASN
Note 4:
AMR
Limiter input
AMR1 : f =4.5MHz, 100dBµV, f =400Hz, 30% AM modulation
o
m
AMR2 : f =4.724MHz, 100dBµV, f =400Hz, 30% AM modulation
o
m
After the above input, measure the output level of sound output. (AMout)
Calculate the ratio of the output level of Note 1.
AMout
OD
AMR = 20log
V
Note 5:
Note 6:
Audio Frequency Bandwidth
Limiter input
AF
AF
: f variable (center 4.5MHz), 100dBµV, f =400Hz, 100% (25kHz / dev) FM modulation
BW1
BW2
o
m
: f variable (center 4.724MHz), 100dBµV, f =400Hz,
o
m
100% (25kHz / dev) FM modulation
After the above input, measure the output level of sound output. Calculate the frequency width
when the output level of Note 1 becomes −3dB by changing the f frequency high and low.
o
S / N Ratio
Limiter input
S / N (1) : f =4.5MHz, 100dBµV CW
o
S / N (2) : f =4.724MHz, 100dBµV CW
o
After the above input, measure the output level of sound output (S / N out). Calculate the ratio of
the output level of Note 1.
V
OD
S / N out
S / N = 20log
Note 7:
Cross Talk between sound outputs
Limiter input
SIF1 f =4.5MHz, 100dBµV, f =400Hz
o
m
CR1:
SIF2 f =4.724MHz, 100dBµV, CW
o
SIF1 f =4.5MHz, 100dBµV, CW
o
CR2:
SIF2 f =4.724MHz, 100dBµV, f =400Hz
o
m
After the above input, measure the output leakage level of sound output.
SIF 1(2)
CR1(2) = 20log
SIF 2(1)
Note 8:
Limiter input resitance
Measure the resistance of limiter input terminal by impedance analyzer.
2001-02-06 6/9
TA8721ASN
TEST CIRCUIT 1
DC characteristics
TEST CIRCUIT 2
AC characteristics
2001-02-06 7/9
TA8721ASN
APPLICATION CIRCUIT
TA8712N /TA8796N
TA8721ASN
2001-02-06 8/9
TA8721ASN
PACKAGE DIMENSIONS
SSIP12-P-1.78
Unit: mm
Weight : 0.71g (Typ.)
2001-02-06 9/9
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