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TA2012 데이터시트 PDF




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부품번호 TA2012 기능
기능 3V AM / FM IF + MPX (For Digital Tuning System)
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TA2012 데이터시트, 핀배열, 회로
TA8132AN / AF , TA2012N / F
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8132AN,TA8132AF,TA2012N,TA2012F
3V AM / FM IF + MPX
(For Digital Tuning System)
TA8132AN, TA8132AF and TA2012N, TA2012F are the AM / FM
IF+ST DET system ICs, which are designed for DTS radios.
These are included many functions and these can be used for
digital tuning system with IF counter.
Features
· Builtin AM / FM IF and FM stereo PLL multiplex decoder.
· Suitable for combination with digital tuning system which is
included IF counter.
One terminal type AM / FM IF count output (auto stop
signal) for IF counter of digital tuning system.
FM: 10.7MHz or 1.3375MHz (1 / 8 dividing)
changeable by external switch
AM: 450kHz
Builtin mute circuit for IF count output.
It is controlled by the IF request signal from digital
tuning system,
Pin(8) level: High come out
Low non output
Adjustable for IF count output sensitivity by external
resistance of pin(2).
· For adopting ceramic discriminator and ceramic resonator, it
is not necessary to adjust the FM quad detector circuit and
FM ST DET VCO circuit.
Weight
SDIP24P3001.78: 1.2g (typ.)
SSOP24P3001.00 : 0.31g (typ.)
· S curve characteristics of FM detection output in TA8132AN, TA8132AF and TA2012N, TA2012F are reverse to
each other.
TA8132AN, TA8132AF: Reverse characteristic.
TA2012N, TA2012F: Normal characteristic.
· Builtin one terminal type AM low cut circuit.
· TA2053F is reverse pin type of TA2012F.
· Operating supply voltage range (Ta = 25°C)
VCC (opr.) = 1.8~8.0V
1 2002-10-30




TA2012 pdf, 반도체, 판매, 대치품
Pin
No.
Item
7 AGC
8 IF OUT SW
9 IF OUT
10 TUN LED (tuning LED)
11 ST LED (stereo LED)
12 GND
13 R-OUT
14 L-OUT
TA8132AN / AF , TA2012N / F
Internal Circuit
DC Voltage (V)
(at no Signal)
AM FM
0.25 0.35
――
3.0 3.0
――
――
00
1.0 1.0
4 2002-10-30

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TA2012 전자부품, 판매, 대치품
Application Note
1. How to control the IF count output signal (pin(9) output)
TA8132AN / AF , TA2012N / F
H
V8
L
TUN LED
ON OFF
Come out
Non output
Non output
Non output
· Whether or not there is the IF count output signal (pin(9) output) is determined by the and of the pin(8)
control voltage: V8 and tuning LED on / off switching.
In the condition of
V8: High (active high, VTH = 0.8V (typ.))
TUN LED: ON (Vin VL+2dBµV EMF (typ.))
the IF count output signal comes out from the pin(9).
In the case of the tuning LED function is not needed, it doesn't matter the pin(10) is opened.
· The output impedance of pin(9) is 1.5k(typ.) (cf.P.4)
It is possible to reduce the IF count output signal level to add the resistance between the pin(9) and the VCC
line.
· The signal waveform is the rectangular wave, and the level is 500mVp-p (typ.)
2. How to control the divider of FM IF
Switch
VCC: 10.7MHz output
GND or OPEN: 1.3375MHz output (1 / 8 dividing)
3. How to adjust the IF count output sensitivity
· The IF count output sensitivity (search sensitivity)
Can be adjusted by varying the IF AMP gain for FM and varying the MIXER gain for AM.
This setting is made by changing the value of external resistance R2 which is connected to
pin(2).
· However, this is only possible at the auto-tuning mode. (external voltage supplied to pin(8) is at high level.)
The original again returns while receiving a broadcast station (supplied voltage to pin(8) is at low level.)
7 2002-10-30

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