NTE NTE1511 Datasheet

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: V
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), V
Output Voltage (Pin14), V
Output Voltage (Pin9 to Pin13, V
Reference Flow–Out Current (Pin5), I
Allowable Power Dissipation, Pdmax

Without Heatsink 1.3W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

With 50 x 50 x 1mm3 Al plate 2.15W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating Temperature Range, T
Storage Temperature Range, T

= 2.8V ±0.2V

ref

IN

OUT

OUT(D)

opr

stg

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–0.3V to +8.0V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

≤ VCC at output (D1 to D5) OFF), V

ref

OUT(D)

–1.0mA to 0mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–40° to +125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

–0.3V to V

–0.3V to +10V. .

–10° to +60°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CC

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 Symbol Pin # Test Conditions Min Typ Max Unit

Supply Voltage V
Input Voltage V
Output Pin Load Resistance RLOUT 14 Between OUT (Pin14) and GND (Pin7) 15 – 20 kΩ

IN1

CC

+

8 5 – 16 V

, 22, 3 –0.3 – V

CC

V

Electrical Characteristics: (TA = +25°C, VCC = 5V to 16V unless otherwise specified)

Parameter Symbol Pin # Test Conditions Min Typ Max Unit

Input Bias Current

(Amplifier)

Input Bias Current

IDC(IN–) 1 V
IDC (IN
IDC (IN

+

) 2 V

1

+

) 3 V

2

IDC (–C) 4, 6 V

(Comparator)

IDC (+C) 14 V

V

Amplifier Offset Voltage

(Amplifier)

Reference Voltage V

(1) 14 VCC = 6V to 12V, Amp Gain = 20dB –150 – +150 mV

OFF

V

(2) –150 – +150 mV

OFF

ref

5 I

Pin D Output Current (D1 to D5) IOL (D) 9 to 13 V

Pin D Output Leakage Current I

Output Pin Output Flow–Out

(D) 9 to 13 V

OFF

IOH (1) 14 V

Current

IOH (2) V

Current Dissipation I

CC

Amplifier Gain VG1, V

G2

8 V

– Open Loop 30 – – dB

–

= 0V, V

IN

–

= 1V, V

IN

–

= 1V, V

IN

–

= 0V, V

IN

V

= V

RO1

–

= 1V, V

IN

V

= 0V, V

OUT

= 0 to –0.3mA 2.6 – 3.0 V

ref

–

= 0V, V

IN

V

V

V

V

= 2.0V to 2.3V

D1 to 5

–

= 1V, V

IN

= 0V

D1 to 5

–

= 1V, V

IN

= 0V

OUT

–

= 1V, V

IN

= 0V

OUT

–

= 1V, V

IN

RO2

+

= V

IN1

+

= V

IN1

+

= V

IN1

+

= V

IN1

= 0V

+

= V

IN1

RO1

+

= V

IN1

+

= V

IN1

+

= VCC, V

IN1

+

= 0V, V

IN1

+

= V

IN1

= V

+

= 1V –4 – 0 µA

IN2

+

= 0V –2 – 0 µA

IN2

+

= 0V –2 – 0 µA

IN2

+

= 1V,

IN2

+

= 0V,

IN2

= V

RO2

IN2

IN2

IN2

ref

+

= 1V,

+

= 0V,

+

= 0V,

IN2

+

= VCC,

IN2

+

= 0V – 12 25 mA

–5 – 0 µA

–5 – 0 µA

–25 –18 –10 mA

–50 – 0 µA

– – –3 mA

– – –3 mA

Comparator Level: (TA = +25°C, VCC = 5V to 16V unless otherwise specified)

Comparator Level Symbol Pin # Test Conditions Min Typ Max Unit

LED5 (D5) GD
LED4 (D4) GD

LED3 (D3) GD
LED3 (D2) GD
LED1 (D1) GD

5
4

3
2
1

13 V
12

RO1

= 0V, V

= 3V 2.9 3.0 3.1 dB

RO2

2.3 2.4 2.5 dB
11 1.7 1.8 1.9 dB
10 1.1 1.2 1.3 dB

9 0.5 0.6 0.7 dB

Pin Connection Diagram

Tab

Input (–)

Input (+) 1
Input (+) 2

RO 2

V

ref

1
2

3
4
5

14

RL Output

LED5

13

LED4

12
11 LED3

LED2

10

RO 1
GND

6
7

9
8

LED1
V

CC