Samsung KA2181 Datasheet

KA2181 REMOTE CONTROL PREAMPLIFIER

8-SIP

ORDERING INFORMATION

REMOTE CONTROL PREAMPLIFIER

The KA2181 is a silicon monolithic integrated circuit
designed for a remote control preamplifier of infrared
signals. This device has features of low power, high
sensitivity and wide supply voltage.

FUNCTIONS

• AMP • ABLC • LIMITER & LEVEL SHIFT

• PEAK DET • SHAPING

FEATURES

• Wide operation voltage VCC=6 to 14.4V

• Low power consumption ICC=2.5mA Typ.

• High input sensitivity 50µV

• Peak detector

• Small size package 8-SIP

• A minimum number of parts are required

• Designed for use with the KS5803 remote control transmitter IC.

BLOCK DIAGRAM

P-P

Typ.

Device Package Operating Temperature

KA2181 8-SIP

-20°C ~+75°C

Input

PIN-Photo
Diode

+

7 AMP

Tuning Coil

ABLC

By-pass Capacitor

+

3 4 8

Peak Hold Capacitor

BIAS

Limiter &

Level shift

6

Fig. 1

+

Peak DET

5

Ground

Power Supply

1

Shaping

2

Integral Capacitor

VCC
6 ~14.4V

Output

KA2181 REMOTE CONTROL PREAMPLIFIER

ABSOLUTE MAXIMUM RATINGS (TA=25°C)

Characteristic Symbol Value Unit

Supply Voltage
Power Dissipation
Operating Temperature
Storage Temperature

V

CC

P

D

T

OPR

T

STG

15

270

-20~+75

-45~+125

mW

RECOMMENDED OPERATING CONDITIONS

Characteristic Symbol Min. Typ. Max. Unit

Power Supply V
Input Frequency f

CC
IN

6.0 8.5 14.4 V
30 - 50 KHz

ELECTERICAL CHARACTERISTICS

(TA=25°C, VCC=8.5V, fIN=40KHz)

Characteristic

Supply Current I
Input Terminal Voltage V
Input Terminal Voltage V

1st Stage Voltage Gain A
Detection Input Voltage

Input Impedance
Output Voltage V

Output Leakage Current I
Noise Input Open Output Terminal is not fall

Symbol Test Conditions Min. Typ. Max. Unit

CC

1 2.1 2.6 3.1 V

IN

2

IIN=70µA
#7-#3,
V

=500mV

OUT

P-P

IOL=0.1mA,
υ IN=7mV

P-P

VOH=14.4V - - 2

υ
γ

IN

VL

IN

IN

OL

OH

1.5 2.5 3.5 mA

3.4 4.1 4.9 V

- 60 - dB

- 50 100

40 60 80

- - 0.5 V

V

°C
°C

µV

KΩ

P-P

µA