UNISONIC TECHNOLOGIES CO., LTD
LA2284/A
5-DOT DUAL LED LEVEL
METER DRIVER
LINEAR INTEGRATED CIRCUIT
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
Lead Free
LA2284L-G09-T
LA2284L-SM2-R
LA2284AL-G09-T
LA2284AL-SM2-R
Halogen Free
LA2284G-G09-T
LA2284G-SM2-R
LA2284AG-G09-T
LA2284AG-SM2-R
Package
SIP-9
MSOP-10
SIP-9
MSOP-10
Packing
Tube
Tape Reel
Tube
Tape Reel
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Copyright © 2011 Unisonic Technologies Co., Ltd
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QW-R121-002.C
LA2284/A
PIN CONFIGURATION
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
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LA2284/A
ABSOLUTE MAXIMUM RATINGS
(T
A
=25°C)
LINEAR INTEGRATED CIRCUIT
PARAMETER
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
=25°C, V
CC
=6V, f=1kHz, unless otherwise specified)
PARAMETER
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
LA2284
LA2284A
SYMBOL
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
11.0
24
-1.0
TYP
6.0
6.0
5
56
-10.0
-5
0
3.0
6
15.0
26
-0.3
MAX
16.0
16.0
8
66
-8.5
-4
3.5
7
18.5
28
UNIT
V
V
mA
mV
dB
dB
dB
dB
dB
mA
dB
μA
V
IN
=0.1V
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QW-R121-002.C
LA2284/A
TEST CIRCUIT
LINEAR INTEGRATED CIRCUIT
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QW-R121-002.C
LA2284/A
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.
V
CC
V
CC
=10~16V; R=100Ω
V
CC
= 8~14V; R=68Ω
V
CC
=6.5~12V; R=47Ω
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.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R121-002.C
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