TA2057N Ver la hoja de datos (PDF) - Toshiba
Número de pieza
componentes Descripción
Fabricante
TA2057N Datasheet PDF : 18 Pages
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3. How to control the AM IF output signal (pin(18) output)
TA2057N
Pin(18) Output Signal
GND
V2
Vstb
AM DET out
AM IF out
4. AM local oscillator buffer output
· The output impedance of AM local oscillator buffer output pin (pin(5) ) is 750Ω (typ.).
· It is possible to reduce the output level to add the resistance between the pin(5) and VCC line.
The signal waveform is the rectangular wave, and the level is 500mVp-p. (fOSC = 1.45MHz (typ.) )
· The higher local oscillation frequency (fOSC) to be, the lower buff output level to be owing to the load capacity.
So, in the case that it is connected to other circuits, take care of the input capacity of these circuits and stray
capacity of wire.
5. FM detector circuit
For the FM detector circuit, detector coil is able to use instead of ceramic discriminator.
Recommended circuit and recommended coil are as follows. In this case, please take care that Vin (lim.) fall a
little.
Test
Co
Frequency (pF)
Qo
Turns
1-2
2-3
1-3
4-6
10.7MHz
100
100
―
―
12
―
Wire
(mmf)
0.12 UEW
REF.
Sumida electric Co., ltd.
2153-4095-189
or equivalent
10
2002-10-30
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