NTE NTE1500 Integrated circuit 7-step led driver circuit Datasheet

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: (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 = 9V unless otherwise specified)
Parameter
Supply Current
Output Inflow Current
Reference Voltage
Output Offset Voltage (Amp)
Voltage Gain (Amp)
Output Pin Leakage Current
Symbol
Itot
Test Conditions
V2 = 0
I(SINK)9–15 VI = 3.55V, V7 = 3.5V
VREF
VO(offset)
VCC = 16V, GV = 20dB, V2 = 0
Min
Typ
Max
Unit
4
–
18
mA
13
–
25
mA
3.55
3.75
3.95
V
–150
–
+150
mV
GV
V2 = 50mV
18
20
22
dB
IO(Leak)
VCC = 18V
0
–
20
µA
Electrical Characteristics (Cont’d): (TA = +25°C, VCC = 9V unless otherwise specified)
Parameter
Symbol
Input Bias Current (Amp)
Input Bias Current (Comparator)
Comparator Level (NTE1500)
Comparator Level (NTE1501)
Test Conditions
Min
Typ
Max
Unit
IBias2
VCC = 18V, V2 = 0
–2
–
0
µA
IBias3
VCC = 18V, V3 = 0
–2
–
0
µA
IBias7
VCC = 18V, V2 = 10V, V3 = 0, V7 = 0
–10
–
0
µA
IBias1
VCC = 18V, V3 = 10V, VI = 0, V2 = 0,
V6 = V7
–10
–
0
µA
GD1 *
V7 = 3.5, 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
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
GD1
V7 = 3.65, V8 = 0
* The comparator reference voltage is 3.5V and 2.0V is 0dB (VCCopr = 5V to 16V).
Pin Connection Diagram
Output 1
16 VCC
Input (–) 2
15 LED7
Input (+) 3
14 LED6
LED Current Input 4
13 LED5
LED Current Input 5
12 LED4
6
11 LED3
R2 7
10 LED2
R1 8
9 LED1
Vref
GND 17
1.102 (28.0) Max
17
8
1
.256 (6.5)
9
16
.866 (22.0) Max
.300
(7.62)
.200
(5.08)
.200 (5.08)
.100 (2.54)
.122 (3.0)
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