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PDF TK15220MTL Data sheet ( Hoja de datos )
| Número de pieza | TK15220MTL | |
| Descripción | Audio Analog Switch | |
| Fabricantes | TOKO | |
| Logotipo |  |
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FEATURES
s Wide Operating Voltage Range (2 to 13 V)
s Low Distortion (typ. 0.004%)
s Wide Dynamic Range (typ. 6 VP-P)
s Low Output Impedance (typ. 20 Ω)
s Protection at Output Terminal.
TK15220
APPLICATIONS
s Audio Systems
s Radio Cassettes
Audio Analog Switch
DESCRIPTION
The TK15220M is an Analog Switch IC that was developed
for audio frequency applications. The function of the IC is
to select one output from two input channels. The channel
selection can be controlled by a higher level by the addition
of an external resistor. The TK15220M operates from a
single power supply with the input bias built-in (VCC/2).
Because the distortion is very low, the TK15220M is
suitable for various signal switching applications, especially
Hi-Fi devices. The TK15220M offers a wide operating
voltage range with simple associated circuitry.
The TK15220M is available in the small SOT23L-6 plastic
surface mount package.
TK15220
IN A
OUT20P
IN B
VCC
GND
KEY
BLOCK DIAGRAM
ORDERING INFORMATION
TK15220M
VCC
IN A +
-
VCC
IN B +
-
VCC
VCC
OUT
KEY
GND
Tape/Reel Code
TAPE/REEL CODE
TL: Tape Left
June 1999 TOKO, Inc.
Page 1
1 page  
TK15220
TEST CIRCUITS AND METHODS (CONT.)
RESIDUAL NOISE (FIGURE 7)
This value is not a S/N ratio. This is a noise which occurs
from the device itself.
1) Pin 4 is in the open condition, or low level.
2) Connect an AC volt meter to Pin 2.
3) Connect a capacitor to GND from Pin 1.
4) Measure the AC voltage of Pin 2. This value is the noise
of Ach. If the influence of noise from outside exists, use
optional filters.
5) Next, connect Pin 4 to the VCC, or high level.
6) Remove the capacitor of Pin 1 and connect the capacitor
to Pin 3.
7) Measure in the same way.
This value is the noise level of Bch.
+
V~
VCC
+
+
5K
V~
V4
+
~V~
V3
Figure 8
VCC
+
I/O TERMINAL VOLTAGE (FIGURE 9)
This is the DC voltage of the input and output.
Because the input and the output are nearly equal,
only the output is measured.
1) Pin 4 is in the open condition, or low level.
2) Connect a DC volt meter to Pin 2 and measure.
This value is the terminal voltage of Ach.
3) Next, connect Pin 4 to the VCC, or high level.
4) Measure in the same way.
This value is the terminal voltage of Bch.
Figure 7
VCC
+
CROSS TALK (FIGURE 8)
This is the cross talk between Ach and Bch.
1) Pin 4 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 in series to GND
from Pin 1.
4) Input a sine wave (10 kHz, 1 Vrms) to Pin 3.
5) Measure the level of Pin 3 and name this V3.
6) Measure the level of Pin 2 and name this V4.
7) Calculate:
Cross Talk = 20 Log (V4 / V3)
This value is the cross talk to Ach from Bch.
8) Next, connect Pin 4 to the V , or high level.
CC
9) Change line of Pin 1 and Pin 3.
10) Input the same sine wave to Pin 1.
11) Measure and calculate in the same way.
This value is the isolation to Bch from Ach.
V
Figure 9
OUTPUT TERMINAL DIFFERENCE
This is the DC output voltage difference between Ach and
Bch. This is calculated by using values measured at the
I/O Terminal Voltage.
∆ Vcent = | (Ach DC output value) - (Bch DC output
value) |
This value is the voltage difference.
June 1999 TOKO, Inc.
Page 5
5 Page 
NOTES
TK15220
June 1999 TOKO, Inc.
Page 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet TK15220MTL.PDF ] | |
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