UNISONIC TECHNOLOGIES CO., LTD
LA2284/A
LINEAR INTEGRATED CIRCUIT
www.unisonic.com.tw 1 of 5
Copyright © 2005 Unisonic Technologies Co., Ltd
QW-R121-002,B
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
SIP-9
MSOP-10
*Pb-free plating product number:
LA2284L/LA2284AL
ORDERING INFORMATION
Order Number
Normal Lead Free Plating Package Packing
LA2284-G09-T LA2284L-G09-T SIP-9 Tube
LA2284-SM1-R LA2284L-SM1-R MSOP-10 Tape Reel
LA2284A-G09-T LA2284AL-G09-T SIP-9 Tube
LA2284A-SM1-R LA2284AL-SM1-R MSOP-10 Tape Reel
LA2284L-G09-T
(1)Packing Type
(3)Lead Plating
(2)Package Type
(1) R: Tape Reel, T: Tube
(2) G09: SIP-9, SM1: MSOP-10
(3) Lead Free Plating, Blank: Pb/Sn
LA2284/A
LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD
2 of 5
www.unisonic.com.tw
QW-R121-002,B
PIN CONFIGURATION
1
2
3
4
56
7
8
9
10
D1
D2
D3
D4
GND D5
Output
Input
V
CC
NC
1 2 3 4 5 6 7 8 9
D1 D2 D3 D4 GND D5 Output Input V
CC
MSOP-10 SIP-9
BLOCK DIAGRAM
LA2284/A
LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD
3 of 5
www.unisonic.com.tw
QW-R121-002,B
ABSOLUTE MAXIMUM RATINGS
(Ta=25°C)
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
(Ta=25°C, V
CC
=6V, f=1kHz, unless otherwise specified)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
LA2284 3.5 6.0 16.0 V
Supply Voltage LA2284A V
CC
3.0 6.0 16.0 V
Supply Current I
CC
V
IN
=0 5 8 mA
Sensitivity V
IN
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 I
O(LED)
11.0 15.0 18.5 mA
Amp Gain Gv V
IN
=0.1V 24 26 28 dB
Input Bias Current I
I(BIAS)
-1.0 -0.3 µA
LA2284/A
LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD
4 of 5
www.unisonic.com.tw
QW-R121-002,B
TEST CIRCUIT
LA2284/A
LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD
5 of 5
www.unisonic.com.tw
QW-R121-002,B
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.
VCC
VCC=10~16V; R=100Ω
VCC= 8~14V; R=68Ω
VCC=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.
