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TEXAS INSTRUMENTS  LM3915N-1/NOPB  Led Driver, 10 Outputs, Common Anode, 3V-25V in, 1.28V/30mA out, DIP-18

Product Overview

The LM3915N-1/NOPB is a monolithic IC that senses analogue voltage levels and drives ten LEDs, LCDs or vacuum fluorescent displays, providing a logarithmic 3dB/step analogue display. One pin changes the display from a bar graph to a moving dot display. LED current drive is regulated and programmable, eliminating the need for current limiting resistors. The whole display system can operate from a single supply as low as 3V or as high as 25V. The IC contains an adjustable voltage reference and an accurate ten-step voltage divider. The high-impedance input buffer accepts signals down to ground and up to within 1.5V of the positive supply. Further, it needs no protection against inputs of ±35V. The input buffer drives 10 individual comparators referenced to the precision divider. Accuracy is typically better than 1db.
  • 3dB/Step, 30dB Range
  • Drives LEDs, LCDs or Vacuum Fluorescents
  • Bar or Dot Display Mode Externally Selectable by User
  • Expandable to Displays of 90dB
  • Internal Voltage Reference from 1.2 to 12V
  • Inputs Operate Down to Ground
  • Output Current Programmable from 1 to 30mA
  • Input Withstands ±35V without Damage or False Outputs
  • Outputs are Current Regulated, Open Collectors
  • Directly Drives TTL or CMOS
  • Internal 10-step Divider is Floating and can be Referenced to a Wide Range of Voltages
  • Green Product, No Sb/Br
Device has limited built-in ESD protection, leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.

 

Product Information

Device Topology:
-
No. of Outputs:
10Outputs
Output Current:
30mA
Output Voltage:
1.28V
Driver Case Style:
DIP
No. of Pins:
18Pins
Input Voltage Min:
3V
Input Voltage Max:
25V
Switching Frequency:
-
Operating Temperature Min:
0°C
Operating Temperature Max:
70°C
Packaging:
Each
Product Range:
-
Automotive Qualifications Standard:
-
Dimming Control Type:
Analogue
MSL:
MSL 1 - Unlimited
Input Voltage:
3V to 25V
LED Driver Application:
VU Meter, Power Meters
SVHC:
To Be Advised
Topology:
-

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Applications

  • Power Management;
  • LED Lighting

Legislation and Environmental

Moisture Sensitivity Level:
MSL 1 - Unlimited
RoHS Compliant:
Yes
Authorized Distributor