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:

Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
Supply Voltage, VCC     18V
Circuit Voltage, VI     7.5V
Input Voltage, VI     16V
Output Voltage, VO     16V
Supply Current, ICC     25mA
Output Current, IO     25mA
Power Dissipation, PD     1800mW
Operating Ambient Temperature Range, Topr     -30° to +75°C
Storage Temperature Range, Tstg     -55° to +150°C

Electrical Characteristics: (TA = +25°C, VCC = 16V unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Supply Current Itot V2 = 0 4 - 18 mA
Output Inflow Current I(SINK)9-15 VI = 3.55V, V7 = 3.5V 13 - 25 mA
Reference Voltage VREF   3.55 3.75 3.95 V
Output Offset Voltage (Amp) VO(offset) VCC = 16V, GV = 20dB, V2 = 0 -150 - +150 mV
Voltage Gain (Amp) GV V2 = 50mV 18 20 22 dB
Output Pin Leakage Current IO(Leak) VCC = 18V 0 - 20 µA
Input Bias Current (Amp) IBias2 VCC = 18V, V2 = 0 -2 - 0 µA
IBias3 VCC = 18V, V3 = 0 -2 - 0 µA
Input Bias Current (Comparator) IBias7 VCC = 18V, V2 = 10V, V3 = 0, V7 = 0 -10 - 0 µA
IBias7 VCC = 18V, V3 = 10V, VI = 0, V2 = 0, V6 = V7 -10 - 0 µA
Comparator Level (NTE1500) GD1 * V7 = 3.5V, V8 = 0 -17 -15 -13 dB
GD2 -9 -7 -5 dB
GD3 -4 -3 -2 dB
GD4 -1 0 +1 dB
GD5 1.5 2.0 2.5 dB
GD6 3.5 4.0 4.5 dB
GD7 4.5 5.0 5.5 dB
Comparator Level (NTE1501) GD1 V7 = 3.65V, V8 = 0 0.4 0.5 0.6 dB
GD2 0.85 1.0 1.15 dB
GD3 1.35 1.5 1.65 dB
GD4 1.85 2.0 2.15 dB
GD5 2.35 2.5 2.65 dB
GD6 2.85 3.0 3.15 dB
GD7 3.35 3.5 3.65 dB

*   The comparator reference voltage is 3.5V and 2.0V is 0dB (VCCopr = 5V to 16V).

Pin Connection Diagram

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