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LM3915N-1 bảng dữ liệu(PDF) 4 Page - Texas Instruments

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LM3915
SNVS740C – JANUARY 2000 – REVISED MARCH 2013
www.ti.com
ELECTRICAL CHARACTERISTICS
(1)(2) (continued)
Parameter
Conditions(1)
Min
Typ
Max
Units
VOLTAGE REFERENCE
Output Voltage
0.1 mA
≤ IL(REF) ≤ 4 mA,
1.2
1.28
1.34
V
V+ = VLED = 5V
Line Regulation
3V
≤ V+ ≤ 18V
0.01
0.03
%/V
Load Regulation
0.1 mA
≤ IL(REF) ≤ 4 mA,
0.4
2
%
V+ = VLED = 5V
Output Voltage Change with
0°C
≤ TA ≤ +70°C, IL(REF) = 1 mA,
1
%
Temperature
V + = VLED = 5V
Adjust Pin Current
75
120
μA
OUTPUT DRIVERS
LED Current
V + = VLED = 5V, IL(REF) = 1 mA
7
10
13
mA
VLED = 5V, ILED = 2 mA
0.12
0.4
LED Current Difference (Between
mA
VLED = 5V, ILED 20 mA
Largest and Smallest LED Currents)
1.2
3
LED Current Regulation
2V
≤ VLED ≤ 17V, ILED = 2 mA
0.1
0.25
mA
ILED = 20 mA
1
3
Dropout Voltage
ILED(ON) = 20 mA, @ VLED = 5V,
1.5
V
ΔILED = 2 mA
Saturation Voltage
ILED = 2.0 mA, IL(REF) = 0.4 mA
0.15
0.4
V
Output Leakage, Each Collector
(Bar Mode) (4)
0.1
10
μA
Output Leakage
(Dot Mode) (4)
Pins 10–18
0.1
10
μA
Pin 1
60
150
450
μA
SUPPLY CURRENT
Standby Supply Current
V+ = +5V, IL(REF) = 0.2 mA
2.4
4.2
mA
(All Outputs Off)
V+ = +20V, IL(REF) = 1.0 mA
6.1
9.2
mA
(4)
Bar mode results when pin 9 is within 20 mV of V+. Dot mode results when pin 9 is pulled at least 200 mV below V+. LED #10 (pin 10
output current) is disabled if pin 9 is pulled 0.9V or more below VLED.
THRESHOLD VOLTAGE
(1)
Output
dB
Min
Typ
Max
Output
dB
Min
Typ
Max
1
−27
0.422
0.447
0.531
6
−12
2.372
2.512
2.819
2
−24
0.596
0.631
0.750
7
−9
3.350
3.548
3.825
3
−21
0.841
0.891
1.059
8
−6
4.732
5.012
5.309
4
−18
1.189
1.259
1.413
9
−3
6.683
7.079
7.498
5
−15
1.679
1.778
1.995
10
0
9.985
10
10.015
(1)
Accuracy is measured referred to 0 dB = + 10.000 VDC at pin 5, with + 10.000 VDC at pin 6, and 0.000 VDC at pin 4. At lower full scale
voltages, buffer and comparator offset voltage may add significant error. See Threshold Voltage.
4
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Product Folder Links: LM3915


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