TOKO TK15210MTL Datasheet
TK15210
Audio Analog Switch
FEATURES
■ Wide Operating Voltage Range (3 to 13 V)
■ Low Distortion (typ. 0.004%)
■ Wide Dynamic Range (typ. 6 V
■ Low Output Impedance (typ. 20
P-P
)
Ω)
■ Protection at Output Terminal.
DESCRIPTION
The TK15210M 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 is controlled by a low level. The TK15210M
operates from a single power supply with the input bias
built-in (VCC/2). Because the distortion is very low, the
TK15210M is suitable for various signal switching
applications, especially Hi-Fi devices. The TK15210M
offers a wide operating voltage range with simple associated
circuitry.
APPLICATIONS
■ Audio Systems
■ Radio Cassettes
P
0
2
TK15210
IN A
OUT
IN B
V
CC
GND
KEY
The TK15210M is available in the small SOT23L-6 plastic
surface mount package.
ORDERING INFORMATION
TK15210M
Tape/Reel Code
TAPE/REEL CODE
TL: Tape Left
IN A
IN B
V
CC
V
CC
BLOCK DIAGRAM
+
-
+
-
V
CC
V
CC
V
CC
OUT
KEY
GND
January 2000 TOKO, Inc. Page 1
TK15210
Logic
Key Input
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ......................................................... 14 V
Operating Voltage Range................................. 3 to 13 V
Power Dissipation (Note 4) ................................ 200 mW
Storage Temperature Range ................... -55 to +150 °C
Operating Temperature Range ...................-20 to +75 °C
CONTROL SECTION
Input Voltage .................................... -0.3 V to V
+0.3 V
CC
TK15210M ELECTRICAL CHARACTERISTICS
Test conditions: V
LOBMYSRETEMARAPSNOITIDNOCTSETNIMPYTXAMSTINU
= 8.0 V, T
CC
= 25 °C, unless otherwise specified.
A
ANALOG SWITCH SECTION
Signal Input Voltage ......................... -0.3 V to VCC +0.3 V
Signal Output Current ............................................. 3 mA
Maximum Input Frequency..................................100 kHz
Lead Soldering Temperature (10 s) ...................... 235 °C
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CC
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CC
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tnec
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TUO
Note 1: The KEY input equivalent circuit is shown to the right. When the
control pin is open, the input is pulled up to a high level
(approximately 1.4 V). This applies the channel A input signal
to the output. A low level changes the output to the channel B
input signal.
Note 2: This value measured with a capacitor connected between the
input terminal and ground. See Figure 7.
Note 3: This value measured with a 5 kΩ resistor and series capacitor
connected between the input terminal and ground. See Figure
8.
Note 4: Power dissipation is 200 mW when mounted as recommended.
Derate at 1.6 mW/°C for operation above 25 °C.
egatloV
ecnereffiD
lanimreTtuptuO-tupnI
egatloVlanimreTtuptuO
ecnadepmItupnIecnadepmICD63kΩ
ecnadepmItuptuOecnadepmICD02
V
CC
tuptuo2/8.30.42.4V
3.0+V
81Vm
Ω
Page 2 January 2000 TOKO, Inc.
TEST CIRCUITS AND METHODS
TK15210
V
CC
SW6
SW3
SW7
SW4
SW9
1 kHz
1 Vrms
2 Vrms
SW8
10 kHz
1 Vrms
~
or
~
5 kΩ
SW5
1: The above condition tests the dynamic range measurement for channel A.
2: SW5 is for residual noise measurement.
3: SW8 is for cross talk measurement.
SUPPLY CURRENT (FIGURE 1)
This current is a consumption current with a nonloading
condition.
1) Measure the inflow current to Pin 6 from VCC. This
current is the supply current.
V
CC
A
10 µF
10 µF
V
~
+
+
SW2
V
THD
_
+
OSC
~
+
SW1
V
CC
+
V
Figure 2
KEY INPUT CURRENT (FIGURE 3)
This current is the outflow current from the control terminal.
1) Measure the current to GND from Pin 4. This current is
Figure 1
CONTROL LOW/HIGH LEVEL (FIGURE 2)
the outflow current.
V
CC
+
This level is a measurement of the threshold level.
1) Input VCC to Pin 6. (This condition is the same with
all remaining measurements, omitted from their
descriptions for simplicity.)
2) Input to Pin 1 with sine wave (1 kHz, 1 Vrms).
A
3) Connect an oscilloscope to Pin 2.
4) Elevate the Pin 4 voltage from 0 V gradually, until the
sine wave appears at the oscilloscope. This voltage is
Figure 3
the threshold level when the wave appears.
January 2000 TOKO, Inc. Page 3
TK15210
V
CC
+
+
~
V
~V~
V1 V2
TEST CIRCUITS AND METHODS (CONT.)
TOTAL HARMONIC DISTORTION (FIGURE 4)
Use the lower distortion oscillator for this measurement
because the distortion of the TK15210 is very low.
1) Pin 4 is in the open condition, or high level.
2) Connect a distortion analyzer to Pin 2.
3) Input a sine wave (1 kHz, 1 Vrms) to Pin 1.
4) Measure the distortion of Pin 2. This value is the
distortion of Ach.
5) Next connect Pin 4 to GND, or low level.
6) Input the same sine wave to Pin 3.
7) Measure in the same way. This value is the distortion
of Bch.
V
CC
+
Figure 5
MAXIMUM INPUT LEVEL (FIGURE 6)
+
THD
~
Figure 4
VOLTAGE GAIN (FIGURE 5)
This is the output level vs. the input level.
1) Pin 4 is in the open condition, or high level.
2) Connect AC volt meters to Pin 1 and Pin 3.
(For best results, use identical meters.)
3) Input a sine wave (1 kHz) to Pin 1 (f = optional up to max.
20 kHz, 1 Vrms).
4) Measure the level of Pin 1 and name this V1.
5) Measure the level of Pin 2 and name this V2.
6) Calculate Gain = 20 Log
(( |V2 - V1| )/V1)
10
V1<V2 = + Gain, V1>V2 = - Gain
This value is the voltage gain of Ach.
7) Next, connect Pin 4 to GND, or low level.
8) Input the same sine wave to Pin 3.
9) Measure and calculate in the same way.
This value is the voltage gain of Bch.
This measurement is made at the output side.
1) Pin 4 is in the open condition, or high level.
2) Connect a distortion analyzer and an AC volt meter to
Pin 2.
3) Input a sine wave (1 kHz) to Pin 1 and elevate the voltage
from 0 V gradually until the distortion gets to 0.1% at Pin
2.
4) When the distortion amounts to 0.1%, stop elevating and
measure the AC level of Pin 2.
This value is the maximum input level of Ach.
5) Next, connect Pin 4 to GND, or low level.
6) Input the same sine wave to Pin 3.
7) Measure in the same way.
This value is the maximum input level of Bch.
V
CC
+
+
THD
~
V
~
Figure 6
Page 4 January 2000 TOKO, Inc.
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