NTE NTE1511

NTE1511
Integrated Circuit
5–Step LED Driver for Linear Scale
Description:
The NTE1511 is an integrated circuit in an 14–Lead DIP type package designed for use in level meter
applications. This device is capable of driving 5 LEDs to create a bar–type 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 low–voltage reference power supply is
built–in, so that the only external components required are LEDs, resistors, and capacitors.
Features:
D Wide Supply Voltage Range: +5V to +16V
D Reference Voltage: Vref = 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: Pdmax = 1.15W @ TA = +25°C
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Maximum Supply Voltage (Pin8), VCCmax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to +18V
Input Voltage (Pin1, Pin2, Pin3), VIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to VCC
Output Voltage (Pin14), VOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to +8.0V
Output Voltage (Pin9 to Pin13, VOUT(D) ≤ VCC at output (D1 to D5) OFF), VOUT(D) . . –0.3V to +10V
Reference Flow–Out Current (Pin5), Iref . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –1.0mA to 0mA
Allowable Power Dissipation, Pdmax
Without Heatsink . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3W
With 50 x 50 x 1mm3 Al plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.15W
Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –10° to +60°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +125°C
Note 1. A voltage of VCC+0.3V or more must not be applied to the input and output pins.
Recommended Operating Conditions: (TA = +25°C unless otherwise specified)
Parameter
Supply Voltage
Symbol Pin #
Test Conditions
Min
Typ
Max Unit
VCC
8
5
–
16
V
Input Voltage
VIN1+, 2
2, 3
–0.3
–
VCC
V
Output Pin Load Resistance
RLOUT
14
15
–
20
kΩ
Between OUT (Pin14) and GND (Pin7)
Electrical Characteristics: (TA = +25°C, VCC = 5V to 16V unless otherwise specified)
Parameter
Input Bias Current
(Amplifier)
Input Bias Current
(Comparator)
Amplifier Offset Voltage
(Amplifier)
Reference Voltage
Symbol
Pin #
Test Conditions
Min
Typ
Max
Unit
= 1V
–4
–
0
µA
2
VIN– = 1V, VIN1+ = VIN2+ = 0V
–2
–
0
µA
3
VIN– = 1V, VIN1+ = VIN2+ = 0V
–2
–
0
µA
–5
–
0
µA
–5
–
0
µA
–150
–
+150
mV
–150
–
+150
mV
2.6
–
3.0
V
IDC(IN–)
1
VIN–
IDC (IN1+)
IDC (IN2+)
= 0V,
VIN1+
=
VIN2+
IDC (–C)
4, 6
VIN– = 0V, VIN1+ = VIN2+
VRO1 = VRO2 = 0V
IDC (+C)
14
VIN– = 1V, VIN1+ = VIN2+ = 0V,
VOUT = 0V, VRO1 = VRO2 = Vref
VOFF(1)
14
VCC = 6V to 12V, Amp Gain = 20dB
= 1V,
VOFF(2)
Vref
5
Iref = 0 to –0.3mA
VIN– = 0V, VIN1+ = VIN2+
VD1 to 5 = 2.0V to 2.3V
Pin D Output Current (D1 to D5)
IOL (D)
9 to 13
= 1V,
–25
–18
–10
mA
Pin D Output Leakage Current
IOFF (D)
9 to 13 VIN– = 1V, VIN1+ = VIN2+ = 0V,
VD1 to 5 = 0V
–50
–
0
µA
Output Pin Output Flow–Out
Current
IOH (1)
VIN– = 1V, VIN1+ = VCC, VIN2+ = 0V,
VOUT = 0V
–
–
–3
mA
VIN– = 1V, VIN1+ = 0V, VIN2+ = VCC,
VOUT = 0V
–
–
–3
mA
14
IOH (2)
Current Dissipation
Amplifier Gain
ICC
8
VIN– = 1V, VIN1+ = VIN2+ = 0V
–
12
25
mA
VG1, VG2
–
Open Loop
30
–
–
dB
Min
Typ
Max
Unit
2.9
3.0
3.1
dB
Comparator Level: (TA = +25°C, VCC = 5V to 16V unless otherwise specified)
Comparator Level
Symbol
Pin #
Test Conditions
LED5 (D5)
GD5
13
LED4 (D4)
GD4
12
2.3
2.4
2.5
dB
LED3 (D3)
GD3
11
1.7
1.8
1.9
dB
LED3 (D2)
GD2
10
1.1
1.2
1.3
dB
LED1 (D1)
GD1
9
0.5
0.6
0.7
dB
VRO1 = 0V, VRO2 = 3V
Pin Connection Diagram
Tab
Input (–) 1
14 RL Output
Input (+) 1 2
13 LED5
Input (+) 2 3
12 LED4
RO 2 4
11 LED3
Vref 5
10 LED2
RO 1 6
9 LED1
GND 7
8 VCC
.099 (2.52)
14
8
.252
(6.45)
1
7
.082 (2.1) Dia
.265
(6.5)
.748 (19.0)
.300 (7.62)
.167
(4.26)
.100 (2.54)
.236 (6.0)
.137 (3.5)