TK15324 Ver la hoja de datos (PDF) - Toko America Inc
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TK15324 Datasheet PDF : 12 Pages
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TK15324
TEST CIRCUITS AND METHODS (CONT.)
CONTROL LOW/HIGH LEVEL (FIGURE 2)
VCC
This level is to measure the threshold level.
1) Input, the VCC to Pin 1. (This condition is the same with
other measurements, omitted from the next for simplicity)
2) Input to Pin 4 with sine wave (f = 1 kHz, VIN = 1 Vrms).
3) Connect an oscilloscope to Pin 3.
4) Drop the control voltage gradually from VCC until the
sine wave appears at the oscilloscope. This voltage is
the threshold level when the wave appears.
+
VCC
Figure 3
+
~
+
Cont.
Figure 2
CONTROL INPUT IMPEDANCE (FIGURE 3)
This is the input resistance of control terminal.
1) Measure the inflow current from VCC to Pin 5.
2) Calculate:
IMP = VCC / Inflow current
This resistance is the input impedance.
TOTAL HARMONIC DISTORTION (FIGURE 4)
Use the lower distortion oscillator for this measurement
because distortion of the TK15324 is very low.
1) Pin 5 is in the open condition, or low level.
2) Connect a distortion analyzer to Pin 3.
3) Input the sine wave (1 kHz, 1 Vrms) to Pin 4.
4) Measure the distortion of Pin 3. This value is the
distortion of 1-Ach.
5) Next connect Pin 5 to the VCC, or high level.
6) Input the same sine wave to Pin 2.
7) Measure in the same way. This value is the distortion
of 1-Bch.
Page 4
June 1999 TOKO, Inc.
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