LM3914DWF National Semiconductor Corporation, LM3914DWF Datasheet - Page 10

• Manufacturer Part Number: LM3914DWF
• Description: LM3914 - Dot/bar Display Driver, Package: Mdip, Pin Nb=18
• Manufacturer: National Semiconductor Corporation

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Typical Applications
*
Calibration: With a precision meter between pins 4 and 6 adjust R1 for voltage V
The adjustments are non-interacting.
Application Example:
Grading 5V Regulators
This application illustrates that the LED supply needs practically no filtering
Highest No.
LED on
10
9
8
7
6
5
4
3
2
1
Red
Red
Yellow
Green
Green
Green
Green
Yellow
Red
Red
Color
5V
V
OUT(MIN)
5.54
5.42
5.30
5.18
5.06
4.94
4.82
4.58
4.46
4.7
(Continued)
Expanded Scale Meter, Dot or Bar
10
D
of 1.20V. Apply 4.94V to pin 5, and adjust R4 until LED No. 5 just lights.
DS007970-8