Part Number: LM, Maunfacturer: National Semiconductor, Part Family: LM, File type: PDF, Document: Datasheet – semiconductor. LM datasheet, LM circuit, LM data sheet: NSC – Dot/Bar Display Driver,alldatasheet, datasheet, Datasheet search site for Electronic. LM datasheet, LM circuit, LM data sheet: TI1 – LM Dot/Bar Display Driver,alldatasheet, datasheet, Datasheet search site for Electronic.
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The IC contains an adjustable voltage reference and an. LED current drive is regulated Driver and programmable, eliminating the need for current limiting Features resistors. One more resistor programs the full-scale anywhere from. The input buffer drives 10 individual com. The ratio of the change in output current. Due to its slow response time, a VU meter will not.
LED brightness is easily controlled with a single pot. LED 1 with a 10k resistor. The differential input voltage which must be.
Japan Customer Support Center. Power Dissipation Note 6. However, any reference loading adds. Electrical Characteristics Notes 2, 4. In most applications, pin 9 is. LED current drive is regulated and programmable, eliminating the need for current limiting resistors.
Dot/Bar Display Driver
The scheme in Figure 13 is useful when the reference and. One more resistor programs the full-scale anywhere from. F capacitor from pin 1 to pin 2 will be sufficient. Optional circuit for improved intensity matching at low currents. Pin 9, the Mode Select input, permits chaining of multiple.
Precision Full-Wave Average Detector. This forces the output of C2 low. The full-wave peak detector of. The reference is designed to be adjustable and develops a.
Devices must be derated for operation at elevated temperatures. Driving Liquid Crystal Display. Connect pin 9 of the first. The current drawn out of the. The difference between any two adja. National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves.
For increased resolution, it’s possible to obtain a display with. Relative Accuracy Input Change. The LM is a monolithic integrated circuit that senses. Its characteristics are defined as the ANSI specifica. This ensures that pin 9 of. The LM is extremely easy to apply.
Further, it needs no protection against inputs of 35V. While several European organizations have specifications.
LM Datasheet National Semiconductor pdf data sheet FREE from
The connection for cascading in. All previous drivers should have a 20k resistor in. Display will change to bar as soon as the LED so selected begins to light.
Circuit as shown is wired for dot mode. The specified return time of 1. The input Buffer drives 10 individual Comparators referenced to the precision divider. To trim the reference voltage. It’s best to capacitively couple the input. Audio applications include average or peak level indicators, and power meters. Total, Pin 6 to 4.
The LEDs should be. Further, it needs no protection against. I LED 2 mA. A, LED current is about 0.
This pin actually performs two functions. The IC contains an adjustable voltage reference datasheett an ac. The whole display system can operate from a single supply as low as 3V or as high as 25V. LED current drive is regulated.