TOKO TK15325MTL Datasheet
TK15325
+
-
+
-
+
-
+
-
Ach
Bch
1ch-in
Ach
Bch
2ch-in
V
CC
1 ch out
1KEY
2 ch out
2KEY
GND
Audio Analog Switch
FEATURES
■ Wide Operating Voltage Range (±3 to ±7 V)
■ Low Distortion (typ. 0.003%)
■ Wide Dynamic Range (typ. 6 V
P-P
)
■ Low Output Impedance (typ. 20 Ω)
■ Low Switching Noise (typ. 3 mV)
DESCRIPTION
The TK15325M is an Analog Switch IC that was developed
for audio frequency. Function is to select one output from
two inputs in a device that includes two circuits, and the
channel can be changed by low level. The TK15325M has
a dual power supply and the input bias is direct coupling at
GND level. Because the distortion is very low, the
TK15325M fits various signals switching. It is best suited
for Hi-Fi devices. Operating voltage is wide, the circuit
plan is simple. The TK15325M is available in a small
plastic surface mount package (SSOP-12).
APPLICATIONS
■ Audio Systems
■ Radio Cassettes
1ch-in 2ch-in
TK15325
V
CC
Bch
OUT
Ach
1KEY
NC
GND
11
Bch
10
OUT
9
Ach
8
2 KEY
NC
7
BLOCK DIAGRAM
ORDERING INFORMATION
TK15325M
June 1999 TOKO, Inc. Page 1
Tape/Reel Code
TAPE/REEL CODE
TL: Tape Left
TK15325
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ...................................................... ±7.5 V
Power Dissipation (Note 5) ................................ 350 mW
Storage Temperature Range ................... -55 to +150 °C
Operating Temperature Range ...................-20 to +75 °C
CONTROL SECTION
Input Voltage ................................... -0.3 V to VCC + 0.3 V
TK15325M ELECTRICAL CHARACTERISTICS
Test conditions: V
LOBMYSRETEMARAPSNOITIDNOCTSETNIMPYTXAMSTINU
= ±4 V, T
CC
= 25 °C, unless otherwise specified.
A
ANALOG SWITCH SECTION
Signal Input Voltage ........................ VEE - 0.3 to VCC + 0.3
Signal Output Current ............................................. 3 mA
Operating Voltage Range............................... ±3 to ±7 V
Maximum Input Frequency..................................100 kHz
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YEKI
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TUO
Note 1: The KEY input equivalent circuit is shown in Figure A.
1 channel and 2 channel is the separate action by 1Key pin and 2 key pin. When the control pin is
open, it is outputted high level (about 1.4 V). Then the A channel input signal is outputted. The
change is carried out at low level.
Note 2: The specification means a value as measurement-input terminal connects to ground
through a capacitor.
Note 3: ISO is a cross talk between A channel and B channel, SEP is a cross talk between 1 channel and 2
channel. The specification means a value as measurement-input termianl connects to ground
through 10 kΩ resistor and capacitor.
Note 4: Input equivalent circuit is shown in Figure B. The standard application of TK15325M is the direct
connecting. When connecting a capacitor, supplying a bias voltage from outside is unnecessary.
Note 5: Power dissipation is 350 mW when mounted as recommended. Derate at 3.0 mW/°C for operation
above 25°C.
ecnereffiD
egatloVlanimreTtuptuO
lennahcemasneewteB331Vm
tnerruCsaiBtupnI4etoN5.0Aµ
ecnadepmItuptuOecnadepmICD02
V
CC
Input Key
Input
Logic
Figure A
V
Figure B
Ω
EE
Page 2 June 1999 TOKO, Inc.
TEST CIRCUITS AND METHODS
V
CC
~
Cont.
+
V
EE
+
+
V
SW6
SW7
CC
SW3
50 kΩ
TK15325
1 kHz
1 Vrms
or
2 Vrms
SW9
~
10 kHz
1 Vrms
~
SW8
SW5
10 kΩ
SW4
SW2
V
~
SUPPLY CURRENT (FIGURE 1)
This current is a consumption current with a nonloading
condition.
1) Bias supply to Pins 2,4,9,11. (This condition is the same
with other measurements, omitted from the next for
simplicity)
2) Measure the inflow current to Pin 1 from VCC. This current is
the supply current.
CC
AV
50 kΩ
33 µF
+
SW1
V
THD
_
+
33 µF
CONTROL LOW/HIGH LEVEL (FIGURE 2)
This level is to measure the threshold level.
1) Input, the VCC to Pin 1 and input V
to Pin 12. (This
EE
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 0 V until the
sine wave appears at the oscilloscope. This voltage is
the threshold level when the wave appears.
50 K
50 K
Figure 1
50 K
50 K
V
EE
Figure 2
June 1999 TOKO, Inc. Page 3
TK15325
V
CC
Cont.
+
+
V
EE
+
TEST CIRCUITS AND METHODS (CONT.)
CONTROL OUTFLOW/INFLOW CURRENT (FIGURE 3)
This current means maximum current with the control.
1) Measure the current from Pin 5 to GND.
This current is the outflow current.
2) Next, measure the current from VCC to Pin 5.
This current is the inflow current.
V
CC
+
Figure 4
+
V
EE
Figure 3
VOLTAGE GAIN (FIGURE 5)
This is the output level against input level.
1) Pin 5 is in the open condition, or high level.
2) Connect AC volt meters to Pin 4 and Pin 3.
(Using the same type meter is best)
TOTAL HARMONIC DISTORTION (FIGURE 4)
Use the lower distortion oscillator for this measurement
because distortion of the TK15325 is very low.
1) Pin 5 is in the open condition, or high 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 GND, or low level.
6) Input the same sine wave to Pin 2.
7) Measure in the same way. This value is the distortion
3) Input a sine wave (f = max. 20 kHz, 1 Vrms) to Pin 4.
4) Measure the level of Pin 4 and name this V1.
5) Measure the level of Pin 3 and name this V2.
6) Calculate Gain = 20 Log (( |V2 - V1| )/V1)
V1<V2 + Gain, V1>V2 - Gain
This value is the voltage gain of 1-Ach.
7) Next, connect Pin 5 to the GND, or low level.
8) Input the same sine wave to Pin 2.
9) Measure and calculate in the same way.
This value is the maximum input level of 1-Bch.
of 1-Bch.
Page 4 June 1999 TOKO, Inc.
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