UNISONIC TECHNOLOGIES CO., LTD
LA2284/A
5-DOT DUAL LED LEVEL
METER DRIVER
DESCRIPTION
LINEAR INTEGRATED CIRCUIT
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
www.unisonic.com.tw
Copyright © 2014 Unisonic Technologies Co., Ltd
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QW-R121-002.D
LA2284/A
LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R121-002.D
LA2284/A
PIN CONFIGURATION
LINEAR INTEGRATED CIRCUIT
MSOP-10
SIP-9
D1
D2
D3
D4
GND
1
2
3
4
5
10 NC
9
8
V
CC
1
Input
D1
2
D2
3
D3
4
D4
5
GND
6
7
8
9
D5 Output Input V
CC
7 Output
6 D5
BLOCK DIAGRAM
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R121-002.D
LA2284/A
PARAMETER
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
(T
A
=25C, unless otherwise specified)
SYMBOL
RATINGS
UNIT
Supply Voltage
V
CC
18
V
Amplifier input Voltage
V8
-0.5 ~ V
CC
V
Pin 7 Voltage
V7
6
V
D terminal Output Voltage
V
D
18
V
Power Dissipation
P
D
1100
W
Operating Temperature
T
OPR
-20 ~ +80
C
Storage Temperature
T
STG
-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
(T
A
=25C, V
CC
=6V, f=1kHz, unless otherwise specified)
PARAMETER
SYMBOL
LA2284
LA2284A
V
CC
I
CC
V
IN
V
C
1
V
C
2
V
C
3
V
C
4
V
C
5
I
O(LED)
G
V
I
I(BIAS)
V
IN
=0
In V
C
3 Level
TEST CONDITIONS
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
Supply Voltage
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
V
IN
=0.1V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 7
QW-R121-002.D
LA2284/A
TEST CIRCUIT
LINEAR INTEGRATED CIRCUIT
APPLICATION INFORMATION
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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R121-002.D
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