TK15324 Ver la hoja de datos (PDF) - Toko America Inc
Número de pieza
componentes Descripción
Fabricante
TK15324 Datasheet PDF : 12 Pages
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TK15324
VCC
TEST CIRCUITS AND METHODS (CONT.)
VCC
+
+
Cont.
Figure 6
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+
Cont.
Figure 7
RESIDUAL NOISE (FIGURE 7)
This value is not S/N ratio. This is a noise which occurs from
the device itself.
1) Pin 5 is the open condition, or low level.
2) Connect an AC volt meter to Pin 3.
3) Connect a capacitor from Pin 4 to GND.
4) Measure AC voltage of Pin 3. This value is the noise of
1-Ach. If the influence of noise from outside exists, use
optional filters.
5) Next, connect Pin 5 to the V , or high level.
CC
6) Connect to GND through a capacitor from Pin 2.
7) Measure in the same way.
This value is the noise level of 1-Bch.
ISOLATION (FIGURE 8)
This is the cross talk between Ach and Bch.
1) Pin 5 is in the open condition, or low level.
2) Connect AC volt meters to Pin 2 and Pin 3.
3) Connect a capacitor and a resistance to GND
from Pin 4.
4) Input a sine wave (10 kHz, 1 Vrms) to Pin 2.
5) Measure the level of Pin 2 and name this V3.
6) Measure the level of Pin 3 and name this V4.
7) Calculate:
ISO = 20 Log (V4 / V3)
This value is the isolation to Ach from Bch.
8) Next, connect Pin 5 to the VCC, or high level.
9) Change line of Pin 2 and Pin 4.
10) Input the same sine wave to Pin 4.
11) Measure and calculate in the same way.
This value is the isolation to Bch from Ach.
Page 6
June 1999 TOKO, Inc.
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