TOKO TK15327MTL Datasheet
TK15327
Audio Analog Switch
FEATURES
■ Wide Operating Voltage Range (2 to 14 V)
■ Low Distortion (typ. 0.004%)
■ Wide Dynamic Range (typ. 6 V
P-P
)
■ Low Output Impedance (typ. 20 Ω)
■ Low Switching Noise (typ. 3 mV)
■ Output Parallel Connection Possible
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).
APPLICATIONS
■ Audio Systems
■ Radio Cassettes
1ch-in 2ch-in
TK15327
V
CC
Bch
OUT
Ach
1KEY
NC
GND
Bch
11
OUT
10
9
Ach
2 KEY
8
NC
7
BLOCK DIAGRAM
V
CC
1 ch out
2 ch out
1KEY
2KEY
GND
ORDERING INFORMATION
TK15327M
Tape/Reel Code
TAPE/REEL CODE
TL: Tape Left
1ch-in
2ch-in
Ach
Bch
Ach
Bch
+
-
+
-
Reg. (VCC / 2)
+
-
+
-
Logic
June 1999 TOKO, Inc. Page 1
TK15327
ABSOLUTE MAXIMUM RATINGS
Supply Voltage ......................................................... 15 V
Power Dissipation (Note 4) ................................ 350 mW
Storage Temperature Range ................... -55 to +150 °C
ANALOG SWITCH SECTION
Signal Input Voltage ........................ -0.3 V to VCC + 0.3 V
Signal Output Current ............................................. 3 mA
Operating Temperature Range ...................-20 to +75 °C
CONTROL SECTION
Input Voltage ................................... -0.3 V to VCC + 0.3 V
Operating Voltage Range................................. 2 to 14 V
Maximum Input Frequency..................................100 kHz
TK15327M ELECTRICAL CHARACTERISTICS
Test conditions: V
LOBMYSRETEMARAPSNOITIDNOCTSETNIMPYTXAMSTINU
I
CC
V
LI
V
HI
Z
NI
DHTnoitrotsiDcinomraHlatoTV
N
L
OSInoitalosI
= 8.0 V, T
CC
= 25 °C, unless otherwise specified.
A
tnerruCylppuS 2.45.6Am
NOITCESLORTNOCYEK
leveLwoLegatloVtupnI1etoN3.0-8.0+V
leveLhgiHegatloVtupnI8.1V
ecnadepmItupnI 05kΩ
NOITCESHCTIWSGOLANA
NI
esioNlaudiseR2etoN01smrVµ
V
NI
3etoN
3.0+V
CC
zHk1=f,smrV1=400.0800.0%
,zHk01=F,smrV1=
57-Bd
PESnoitarapeS
V
NI
3etoN
,zHk01=f,smrV1=
NYDleveLlangiStupnImumixaM%1.0=DHT,zHk1=f0.2smrV
AVGniaGegatloVzHk02~=f0Bd
V
tnec
∆V
tnec
R
NI
Z
TUO
Note 1: The KEY input equivalent circuit is shown to the right.
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: Power dissipation is 350 mW when mounted as recommended. Derate at 3.0 mW/°C for operation above
25°C.
egatloV
ecnereffiD
lanimreTtuptuO-tupnI
egatloVlanimreTtuptuO
ecnatsiseRsaiBtupnI 56Aµ
ecnadepmItuptuOecnadepmICD02
V
CC
tuptuo2/8.30.42.4V
lennahcemasneewteB331Vm
Input Key
08-Bd
Ω
Logic
Page 2 June 1999 TOKO, Inc.
SW9
SW8
TEST CIRCUITS AND METHODS
V
CC
SW6
SW3
10 µF
+
SW7
10 µF
SW4
+
TK15327
33 µF
+
SW2
1 kHz
1 Vrms
or
2 Vrms
~
10 kHz
1 Vrms
~
10 kΩ
SW5
V
V
_
~
1: The above condition represents 1ch.
2: The above conditions distortion rate of 1-Ach and dynamic range measurement.
3: SW5 is for residual noise measurement.
4: SW8 is for cross talk (ISO or SEP) measurement.
SUPPLY CURRENT (FIGURE 1)
This current is a consumption current with a nonloading
condition.
1) Connect Pin 5 to VCC, Pin 8 is low level or open.
1) Measure the inflow current to Pin 1 from VCC. This
current is the supply current.
AV
CC
SW1
LH
THD
LH
CONTROL LOW/HIGH LEVEL (FIGURE 2)
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) Elevate the control voltage from 0 V gradually (Pin 8 is
low level or open), until the sine wave appears at the
oscilloscope. This voltage is the threshold level when
the wave appears.
Figure 1
June 1999 TOKO, Inc. Page 3
TK15327
V
CC
++
TEST CIRCUITS AND METHODS (CONT.)
V
CC
++
~
Cont.
Figure 2
CONTROL INPUT IMPEDANCE (FIGURE 3)
This is the input resistance of control terminals.
1) Measure the inflow current from V
to Pin 5.
CC
2) Calculate:
IMP = VCC / Inflow Current
This resistancde is the input impedance.
TOTAL HARMONIC DISTORTION (FIGURE 4)
Use the lower distortion oscillator for this measurement
because distortion of the TK15327 is very low.
1) Connect VCC to Pin 5, Pin 8 is low level or open.
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, 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 distortion
of 1-Bch.
V
CC
Figure 4
VOLTAGE GAIN (FIGURE 5)
This is the output level against input level.
1) Connect VCC to Pin 5, Pin 8 is low level or open.
2) Connect AC volt meters to Pin 4 and Pin 3.
(Using the same type meter is best)
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.
Figure 3
7) Next, reverse conditions at Pin 5 and Pin 8.
8) Input the same sine wave to Pin 2.
9) Measure and calculate in the same way.
This value is the voltage gain of 1-Bch.
Page 4 June 1999 TOKO, Inc.
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