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LM3915 Datasheet(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LM3915
Description  Dot/Bar Display Driver
Download  25 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM3915 Datasheet(HTML) 4 Page - National Semiconductor (TI)

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Electrical Characteristics (Notes 2, 4) (Continued)
Parameter
Conditions (Note 2)
Min
Typ
Max
Units
SUPPLY CURRENT
Standby Supply Current
(All Outputs Off)
V
+ = +5V, I
L(REF) = 0.2 mA
V
+ = +20V, I
L(REF) = 1.0 mA
2.4
4.2
mA
6.1
9.2
mA
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which
guarantee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit
is given, however, the typical value is a good indication of device performance.
Note 2: Unless otherwise stated, all specifications apply with the following conditions:
3VDC ≤ V
+ ≤ 20 VDC
−0.015V
≤ VRLO ≤ 12 VDC
TA = 25˚C, IL(REF) = 0.2 mA, pin 9 connected to pin 3 (bar mode).
3VDC ≤ VLED ≤ V
+
VREF,VRHI,VRLO ≤ (V
+ − 1.5V)
For higher power dissipations, pulse testing is used.
−0.015V
≤ VRHI ≤ 12 VDC
0V
≤ VIN ≤ V+ − 1.5V
Note 3: 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 table for threshold voltages.
Note 4: Pin 5 input current must be limited to ±3 mA. The addition of a 39k resistor in series with pin 5 allows ±100V signals without damage.
Note 5: 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.
Note 6: The maximum junction temperature of the LM3915 is 100˚C. Devices must be derated for operation at elevated temperatures. Junction to ambient thermal
resistance is 55˚C/W for the molded DIP (N package).
Threshold Voltage (Note 3)
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
www.national.com
4


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