TOKO TK15324MTL Datasheet

TK15324

u

u

Audio Analog Switch

FEATURES

■ Wide Operating Voltage Range (2 to 14 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 TK15324M 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 high level. The TK15324M
has a mono-power supply and the input bias is a supply
type from outside. Because the distortion is very low, the
TK15324M fits various signals switching. It is best suited
for Hi-Fi devices. Operating voltage is wide, the circuit
plan is simple. The TK15324M is available in a small
plastic surface mount package (SSOP-12).

APPLICATIONS

■ Audio Systems

■ Radio Cassettes

1ch-in 2ch-in

TK15324

V

CC

Bch

OUT

Ach

1KEY

NC

GND

11

Bch

10

OUT

9

Ach

8

2 KEY
NC

7

BLOCK DIAGRAM

V

CC

1 ch o

1KEY

2 ch o

2KEY

GND

ORDERING INFORMATION

TK15324M

1ch-in

2ch-in

Ach

Bch

Ach

Bch

+

-

+

-

+

-

+

-

Tape/Reel Code

TAPE/REEL CODE

TL: Tape Left

June 1999 TOKO, Inc. Page 1

TK15324

Logic

Input Key

ABSOLUTE MAXIMUM RATINGS

Supply Voltage ......................................................... 15 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

TK15324M 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

Operating Voltage Range................................. 2 to 14 V

Maximum Input Frequency..................................100 kHz

I

CC

tnerruCylppuS 5.35.5Am

NOITCESLORTNOCYEK

V

LI

V

HI

Z

NI

ecnadepmItupnI 05kΩ

leveLwoLegatloVtupnI1etoN3.0-8.0+V

leveLhgiHegatloVtupnI8.1V

CC

NOITCESHCTIWSGOLANA

DHTnoitrotsiDcinomraHlatoTV

N

L

esioNlaudiseR2etoN01smrVµ

OSInoitalosI

PESnoitarapeS

NI

V

NI

3etoN

V

NI

3etoN

zHk1=f,smrV1=300.0600.0%

,zHk01=F,smrV1=

,zHk01=f,smrV1=

57-Bd

08-Bd

NYDleveLlangiStupnImumixaM%1.0=DHT,zHk1=f0.2smrV

AVGniaGegatloVzHk02~=f0Bd

V

∆V

tnec

egatloV

egatloVlanimreTtuptuO

lanimreTtuptuO-tupnI

tnec

ecnereffiD

V

tuo

edistuo

morfegatlovylppuS=

V

2.0-V

TUO

V

TUO

TUO

lennahcemasneewteB37Vm

3.0+V

2.0+V

I

NI

Z

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 low level. Then the A channel input signal is outputted. The change is carried
out at high 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 TK15324M 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.

Page 2 June 1999 TOKO, Inc.

tnerruCsaiBtupnI4etoN5.0Aµ

ecnadepmItuptuOecnadepmICD02

V

CC

Input

Figure A

Figure B

Ω

TEST CIRCUITS AND METHODS

V

CC

TK15324

33 µF

+

1 kHz

1 Vrms

or

2 Vrms

SW9

~

10 kHz
1 Vrms

~

SW6

SW7

SW8

SW5

10 kΩ

10 µF

SW3

SW4

+

10 µF

+

50 kΩ 50 kΩ

VCC / 2

SW2

V

~

SW1
LH

V

THD

_

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)

CC

AV

This current is a consumption current with a nonloading
condition.

50 K

50 K

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

50 K

50 K

the supply current.

VCC / 2

Figure 1

June 1999 TOKO, Inc. Page 3

TK15324

TEST CIRCUITS AND METHODS (CONT.)

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) Drop the control voltage gradually from VCC until the
sine wave appears at the oscilloscope. This voltage is
the threshold level when the wave appears.

V

CC

++

~

Cont.

V

CC

+

Figure 3

TOTAL HARMONIC DISTORTION (FIGURE 4)

Figure 2

CONTROL INPUT IMPEDANCE (FIGURE 3)

This is the input resistance of control terminal.

1) Measure the inflow current from VCC to Pin 5.

2) Calculate:
IMP = V

/ Inflow current

CC

This resistance is the input impedance.

Use the lower distortion oscillator for this measurement
because distortion of the TK15324 is very low.

1) Pin 5 is in the open condition, or low 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 VCC, or high level.

6) Input the same sine wave to Pin 2.

7) Measure in the same way. This value is the distortion
of 1-Bch.

Page 4 June 1999 TOKO, Inc.