NTE1511
Integrated Circuit
5Step LED Driver for Linear Scale
Description:
The NTE1511 is an integrated circuit in an 14Lead DIP type package designed for use in level meter
applications. This device is capable of driving 5 LEDs to create a bartype display. In accordance
with the input level, the uppermost LED brightness varies to form a linear indicator, making the
NTE1511 ideal for use in signal meters and VU meters. A lowvoltage reference power supply is
builtin, so that the only external components required are LEDs, resistors, and capacitors.
Features:
D
Wide Supply Voltage Range: +5V to +16V
D
Reference Voltage: V
ref
= 2.8V
0.2V
D
LED Output Voltage: Constant Voltage
D
LED Current: Constant Current by Means of an External Resistor
D
Allowable Power Dissipation: P
d
max = 1.15W @ T
A
= +25
C
Absolute Maximum Ratings: (T
A
= +25
C unless otherwise specified)
Maximum Supply Voltage (Pin8), V
CC
max
0.3V to +18V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Voltage (Pin1, Pin2, Pin3), V
IN
0.3V to V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Voltage (Pin14), V
OUT
0.3V to +8.0V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Voltage (Pin9 to Pin13, V
OUT(D)
V
CC
at output (D
1
to D
5
) OFF), V
OUT(D)
0.3V to +10V
. .
Reference FlowOut Current (Pin5), I
ref
1.0mA to 0mA
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Allowable Power Dissipation, P
d
max
Without Heatsink
1.3W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
With 50 x 50 x 1mm
3
Al plate
2.15W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Temperature Range, T
opr
10
to +60
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
40
to +125
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note 1. A voltage of V
CC
+0.3V or more must not be applied to the input and output pins.
Recommended Operating Conditions: (T
A
= +25
C unless otherwise specified)
Parameter
Symbol Pin #
Test Conditions
Min
Typ
Max Unit
Supply Voltage
V
CC
8
5
16
V
Input Voltage
V
IN1
+
,
2
2, 3
0.3
V
CC
V
Output Pin Load Resistance
R
L
OUT
14
Between OUT (Pin14) and GND (Pin7)
15
20
k
Electrical Characteristics: (T
A
= +25
C, V
CC
= 5V to 16V unless otherwise specified)
Parameter
Symbol
Pin #
Test Conditions
Min
Typ
Max
Unit
Input Bias Current
I
DC
(IN
)
1
V
IN
= 0V, V
IN1
+
= V
IN2
+
= 1V
4
0
A
(Amplifier)
I
DC
(IN
1
+
)
2
V
IN
= 1V, V
IN1
+
= V
IN2
+
= 0V
2
0
A
I
DC
(IN
2
+
)
3
V
IN
= 1V, V
IN1
+
= V
IN2
+
= 0V
2
0
A
Input Bias Current
(Comparator)
I
DC
(C)
4, 6
V
IN
= 0V, V
IN1
+
= V
IN2
+
= 1V,
V
RO1
= V
RO2
= 0V
5
0
A
I
DC
(+C)
14
V
IN
= 1V, V
IN1
+
= V
IN2
+
= 0V,
V
OUT
= 0V, V
RO1
= V
RO2
= V
ref
5
0
A
Amplifier Offset Voltage
V
OFF
(1)
14
V
CC
= 6V to 12V, Amp Gain = 20dB
150
+150
mV
(Amplifier)
V
OFF
(2)
150
+150
mV
Reference Voltage
V
ref
5
I
ref
= 0 to 0.3mA
2.6
3.0
V
Pin D Output Current (D
1
to D
5
)
I
OL
(D)
9 to 13 V
IN
= 0V, V
IN1
+
= V
IN2
+
= 1V,
V
D1 to 5
= 2.0V to 2.3V
25
18
10
mA
Pin D Output Leakage Current
I
OFF
(D)
9 to 13 V
IN
= 1V, V
IN1
+
= V
IN2
+
= 0V,
V
D1 to 5
= 0V
50
0
A
Output Pin Output FlowOut
Current
I
OH
(1)
14
V
IN
= 1V, V
IN1
+
= V
CC
, V
IN2
+
= 0V,
V
OUT
= 0V
3
mA
I
OH
(2)
V
IN
= 1V, V
IN1
+
= 0V, V
IN2
+
= V
CC
,
V
OUT
= 0V
3
mA
Current Dissipation
I
CC
8
V
IN
= 1V, V
IN1
+
= V
IN2
+
= 0V
12
25
mA
Amplifier Gain
V
G1
, V
G2
Open Loop
30
dB
Comparator Level: (T
A
= +25
C, V
CC
= 5V to 16V unless otherwise specified)
Comparator Level
Symbol
Pin #
Test Conditions
Min
Typ
Max
Unit
LED5 (D5)
GD
5
13
V
RO1
= 0V, V
RO2
= 3V
2.9
3.0
3.1
dB
LED4 (D4)
GD
4
12
2.3
2.4
2.5
dB
LED3 (D3)
GD
3
11
1.7
1.8
1.9
dB
LED3 (D2)
GD
2
10
1.1
1.2
1.3
dB
LED1 (D1)
GD
1
9
0.5
0.6
0.7
dB
R
O
2
R
O
1
V
ref
V
CC
R
L
Output
Pin Connection Diagram
LED1
LED4
LED5
GND
Input ()
Input (+) 2
Input (+) 1
LED2
1
2
3
4
5
6
7
14
13
12
11
LED3
10
9
8
Tab
PDF 
ZIP