NTE1500 Datasheet, PDF (1/3 Pages) NTE Electronics – Integrated Circuit 7-Step LED Driver Circuit

NTE1500 & NTE1501
Integrated Circuit
7–Step LED Driver Circuit
Description:
The NTE1500 and NTE1501 are integrated circuits designed for driving 7–dot LED displays. The
NTE1500 responds logarithmically to the input signal while the NTE1501 responds linearly. Because
an adjustment pin for output current is provided, the brightness of the LED can be controlled.
Features:
D Linear (NTE1501) and Logarithmic (NTE1500) Response
D 7–LED Bar Graph Display Driver
D Brightness is Externally Adjustable
D High Output Current: 25mA Max
D Series Connection Capable for Driving more than 7–Dot Displays
Absolute Maximum Ratings: (T_A = +25°C unless otherwise specified)
Supply Voltage, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V
Circuit Voltage, V_I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.5V
Input Voltage, V_I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16V
Output Voltage, V_O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16V
Supply Current, I_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25mA
Output Current, I_O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25mA
Power Dissipation, P_D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1800mW
Operating Ambient Temperature Range, T_opr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30° to +75°C
Storage Temperature Range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C
Electrical Characteristics: (T_A = +25°C, V_CC = 9V unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
Supply Current
I_tot
V₂ = 0
4
– 18 mA
Output Inflow Current
I_{(SINK)9–15} V_I = 3.55V, V₇ = 3.5V
13 – 25 mA
Reference Voltage
V_REF
3.55 3.75 3.95 V
Output Offset Voltage (Amp)
Voltage Gain (Amp)
Output Pin Leakage Current
V_O(offset)
G_V
I_O(Leak)
V_CC = 16V, G_V = 20dB, V₂ = 0
V₂ = 50mV
V_CC = 18V
–150 – +150 mV
18 20 22 dB
0
– 20 µA