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PDF TK15327MTL Data sheet ( Hoja de datos )
| Número de pieza | TK15327MTL | |
| Descripción | Audio Analog Switch | |
| Fabricantes | TOKO | |
| Logotipo |  |
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FEATURES
s Wide Operating Voltage Range (2 to 14 V)
s Low Distortion (typ. 0.004%)
s Wide Dynamic Range (typ. 6 VP-P)
s Low Output Impedance (typ. 20 Ω)
s Low Switching Noise (typ. 3 mV)
s Output Parallel Connection Possible
TK15327
APPLICATIONS
s Audio Systems
s Radio Cassettes
Audio Analog Switch
DESCRIPTION
The TK15327M is an Analog Switch IC that was developed
for audio frequency. The function is to select one output
from two inputs and has a floating position too. The
channel can be changed by two control levels and the
device includes two circuits. The TK15327M has a
mono-power supply and the input bias is a built-in type
(VCC / 2 V). Because the distortion is very low, the TK15327M
fits various signals switching. It is best suited for Hi-Fi
devices. Operating voltage is wide, the circuit plan is
simple. The TK15327M is available in a small plastic
surface mount package (SSOP-12).
TK15327
1ch-in
VCC
Bch
OUT
Ach
1KEY
NC
GND
11 Bch
10 OUT
9 Ach
8 2 KEY
7 NC
2ch-in
BLOCK DIAGRAM
ORDERING INFORMATION
TK15327M
Tape/Reel Code
TAPE/REEL CODE
TL: Tape Left
Ach
1ch-in
Bch
Ach
2ch-in
Bch
+
-
+
-
Reg. (VCC / 2)
+
-
+
-
VCC
1 ch out
2 ch out
1KEY
Logic
2KEY
GND
June 1999 TOKO, Inc.
Page 1
1 page  
TK15327
TEST CIRCUITS AND METHODS (CONT.)
VCC
VCC
++
++
Figure 5
Figure 6
MAXIMUM INPUT LEVEL (FIGURE 6)
This measurement measures at output side.
1) Connect VCC to Pin 5, Pin 8 is low level or open.
2) Connect a distortion analyzer and an AC volt meter to
Pin 3.
3) Input a sine wave (1 kHz) to Pin 4 and elevate the voltage
gradually until the distortion gets to 0.1%.
4) When the distortion amounts to 0.1%, stop elevating and
measure the AC level of Pin 3.
This value is the maximum input level of 1-Ach.
5) Next, reverse conditions at Pin 5 and Pin 8.
6) Input the same sine wave to Pin 2.
7) Measure in the same way.
This value is the maximum input level of 1-Bch.
RESIDUAL NOISE (FIGURE 7)
This value is not S/N ratio. This is a noise which occurs from
the device itself.
1) Connect V to Pin 5, Pin 8 is low level or open.
CC
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, reverse conditions at Pin 5 and Pin 8.
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.
June 1999 TOKO, Inc.
Page 5
5 Page 
TK15327
APPLICATION INFORMATION (CONT.)
OUTPUT TERMINAL VOLTAGE DIFFERENCE
This parameter is the output voltage difference between
Ach and Bch, and appears when the channel changes from
Ach to Bch, or changes to the reverse. Generally, this is
called Switching Noise or Pop Noise. If this value is big and
if this noise is amplified by the final amplifier and is
outputted by the speakers, then it appears as a Shock
Sound. Output terminal voltage difference of the TK15327M
is a value that adds the internal bias difference and the off-
set voltage difference. The value of the TK15327M is very
small; its maximum value is 13 mV. Toko can offer the
“Muting IC” if users wish to mute Switching Noise.
DIRECT TOUCH
The signal input terminals:
Internal circuits are operated by constant current circuit,
even if VCC or GND is contacted, damage does not occur.
The signal output terminal:
Outflow or inflow current is decided by ability of final
transistor, but protection circuit is not attached. If GND or
V are contacted damage may occur. Pay attention to
CC
long time contact. Do not supply over the maximum rating.
Referenced to GND, do not provide to all terminals over VCC
+0.3 V or -0.3 V.
DC SIGNAL INPUT
The output of the TK15327M has a saturation voltage (both
V and GND sides about 1.0 V); accordingly the use of a
CC
DC signal is not recommend (e.g., the pulse signal etc.)
NC TERMINAL
1ch-in
ab
c
d VCC
2ch-in
d c ba
327-1
11
10
9
8
7
1ch-out 1 2
11
327-2
10
9
8
7
control
34
2ch-out
Figure 15
KEY NO.
123 4
OUTPUT
c HL LL
a LHLL
b L LHL
d L L LH
NC terminals are not wired inside IC by bonding wire. NC
terminals are not tested so do not connect at outside.
FLOATING POSITION
When all is high level or low level, output is the floating.
Plural high level is prohibited.
TK15327 has floating position and can increase optional
channels. Figure 15 is an example to select one output
from four inputs, and the change operates by four controls.
This function is shown in the table below. If channels
increase more, control keys will increase with the same
number too. In this case the Decoder may be necessary.
Each device and channel has individual output voltage
values within a specification. When channels are in-
creased caution the output terminal voltage difference too.
June 1999 TOKO, Inc.
Page 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet TK15327MTL.PDF ] | |
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