UNISONIC TECHNOLOGIES CO., LTD LA2284/A

UNISONIC TECHNOLOGIES CO., LTD
LA2284/A
LINEAR INTEGRATED CIRCUIT
5-DOT DUAL LED LEVEL
METER DRIVER

DESCRIPTION
The UTC LA2284/A 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.

FEATURES
*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
*Not necessary diode or transistor for ALC
*Minimum number of external parts required

ORDERING INFORMATION
Order Number
LA2284G-G09-T
LA2284G-SM2-T
LA2284G-SM2-R
LA2284AG-G09-T
LA2284AG-SM2-T
LA2284AG-SM2-R

Package
SIP-9
MSOP-10
MSOP-10
SIP-9
MSOP-10
MSOP-10
Packing
Tube
Tube
Tape Reel
Tube
Tube
Tape Reel
MARKING
Package
MARKING
LA2284
LA2284A
SIP-9
MSOP-10
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LA2284/A
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
LINEAR INTEGRATED CIRCUIT
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LA2284/A
LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATION

SIP-9
MSOP-10

D1
1
D2
2
9
VCC
D3
3
8
Input
D4
4
7 Output
GND
5
6 D5
10 NC
1
2
3
4
5
D1
D2
D3
D4
GND
6
7
8
9
D5 Output Input VCC
BLOCK DIAGRAM
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
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (TA=25C, unless otherwise specified)
PARAMETER
SYMBOL
RATINGS
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
Power Dissipation
PD
1100
W
Operating Temperature
TOPR
-20 ~ +80
C
Storage Temperature
TSTG
-40 ~ +125
C
Notes: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.

ELECTRICAL CHARACTERISTICS (TA=25C, VCC=6V, f=1kHz, unless otherwise specified)
PARAMETER
Supply Voltage
SYMBOL
LA2284
LA2284A
Supply Current
Sensitivity
Comparator ON Level 1
Comparator ON Level 2
Comparator ON Level 3
Comparator ON Level 4
Comparator ON Level 5
LED Output Current
Amp Gain
Input Bias Current
VCC
ICC
VIN
VC1
VC2
VC3
VC4
VC5
IO(LED)
GV
II(BIAS)
UNISONIC TECHNOLOGIES CO., LTD
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TEST CONDITIONS
VIN=0
In VC3 Level
VIN=0.1V
MIN
3.5
3.0
46
-11.5
-6
2.5
5
16.5
24
-1.0
TYP
6.0
6.0
5
56
-10.0
-5
0
3.0
6
26
-0.3
MAX
16.0
16.0
8
66
-8.5
-4
3.5
7
22
28
UNIT
V
V
mA
mV
dB
dB
dB
dB
dB
mA
dB
A
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
TEST CIRCUIT

APPLICATION INFORMATION
LINEAR INTEGRATED CIRCUIT
By changing the time constant C1 and, the response, attack and release time, may be varied. In the above
application conditions, power dissipation may be operated at higher levels than the absolute maximum ratings. The
wattage of R is to be determined by the total LED current and R value recommended by the R table.
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UNISONIC TECHNOLOGIES CO., LTD
LA2284/A

LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTIC
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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Copyright © 2014 Unisonic Technologies Co., Ltd
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