CONTEK LA2284 Datasheet

LA2284 LINEAR INTEGRATED CIRCUIT

5-DOT DUAL LED LEVEL METER
DRIVER

DESCRIPTION

The Contek LA2284 is a monolithic integrated circuit designed

for 5-dot LED level meter drivers with a built-in rectifying

amplifier. It is suitable for AC/DC level meters such as VU

meters or signal meters.

FEATURE

*High gain rectifying amplifier included (Gv=26dB)

*Low radiation noise when LED turns on

*Logarithmic indicator for 5-dot LED of bar type

*Constant current output(15mA)

*Wide operating supply voltage(3.5V ~ 16V)

*Not necessary diode or transistor for ALC

*Minimum number of external parts required

BLOCK DIAGRAM

SIP-9

ABSOLUTE MAXIMUM RATINGS(Ta=25 C)

PARAMETER SYMBOL VALUE UNIT

Supply Voltage Vcc 18 V

Amplifier input Voltage V8 -0.5 ~ Vcc V

Pin 7 Voltage V7 6 V

D terminal Output Voltage VD 18 V

Operating Temperature Topr -20 to +80 C

Storage Temperature Tstg -40 to 125 C

Power dissipation PD 1100 W

Contek Microelectronics Co.,Ltd.

CONTEK

http://www.contek-ic.com E-mail:[e-mail]

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LA2284 LINEAR INTEGRATED CIRCUIT

ELECTRICAL CHARACTERISTICS(Ta=25 C,Vcc=6V,f=1kHz,unless otherwise specified)

PARAMETER SYMBOL TEST CONDITIONS MIN. TYP. MAX. UNIT

Supply Voltage Vcc 3.5 6.0 16.0 V

Supply Current Icc VIN=0 5 8 mA

Sensitivity Vin In Vc3 Level 46 56 66 mV

Comparator ON Level 1 Vc1 -11.5 -10.0 -8.5 dB

Comparator ON Level 2 Vc2 -6 -5 -4 dB

Comparator ON Level 3 Vc3 0 dB

Comparator ON Level 4 Vc4 2.5 3.0 3.5 dB

Comparator ON Level 5 Vc5 5 6 7 dB

LED Output current ILED 11.0 15.0 18.5 mA

Amp Gain Gv Vi=0.1V 24 26 28 dB

Input Bias Current IINO -1.0 -0.3 mA

TEST CIRCUIT

CONTEK

Contek Microelectronics Co.,Ltd.

http://www.contek-ic.com E-mail:[e-mail]

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