仕様
| 属性 | 値 |
| Package / Case | Bulk |
| Part Status | Active |
| Display Type | LED, LCD, Vacuum Fluorescent (VF) |
| Configuration | Dot/Bar Display |
| Digitsor Characters | 10 Steps |
| Supply Current | 6.1 mA |
| Voltage - Supply | 3V ~ 20V |
| Operating Temperature | 0°C ~ 70°C |
| Mounting Type | Surface Mount |
概要
Description
LM3914V/NOPB is TI’s Pb-free variant of the LM3914 10-segment LED display driver. It provides a 10-channel, current-sinking LED driver with an internal 1.25 V reference ladder and an adjustable LED current.
Key points:
- 10 outputs (OUT1–OUT10) that sink LED current; LEDs are connected from +V to outputs.
- Input range 0–1.25 V; LED step size corresponds to 0.125 V per LED threshold.
- LED current programmable with one resistor (RSET) between REF OUT and REF ADJ: I_LED ≈ 1.25 V / RSET (typical 1–30 mA).
- Modes: DOT (one active LED) or BAR (consecutive LEDs up to the highest lit) via MODE pin.
- Supply up to about 25–30 V depending on package; suitable for VU meters, audio level meters, battery indicators, etc.
- NOPB = no lead (Pb-free); V indicates the package variant.
In short, it converts an analog input into a scalable LED display with simple external components.
Key points:
- 10 outputs (OUT1–OUT10) that sink LED current; LEDs are connected from +V to outputs.
- Input range 0–1.25 V; LED step size corresponds to 0.125 V per LED threshold.
- LED current programmable with one resistor (RSET) between REF OUT and REF ADJ: I_LED ≈ 1.25 V / RSET (typical 1–30 mA).
- Modes: DOT (one active LED) or BAR (consecutive LEDs up to the highest lit) via MODE pin.
- Supply up to about 25–30 V depending on package; suitable for VU meters, audio level meters, battery indicators, etc.
- NOPB = no lead (Pb-free); V indicates the package variant.
In short, it converts an analog input into a scalable LED display with simple external components.
Equivalent
Equivalent products: LM3914V/NOPB is the lead-free variant of the LM3914 10-segment LED display driver. Direct cross-refs include LM3914N/NOPB and LM3914N (TI/National). Related devices (not drop-in) are LM3915 and LM3916 (log/linear scale variants).
Features
Here are the key features of the LM3914V/NOPB (LED bar/dot display driver):
- 10-channel LED driver with current-sinking outputs (drives LEDs directly).
- Dot or Bar display mode selectable (one LED on or a continuous bar).
- External resistor (Rset) to set the current per LED (wide adjustable range).
- Analog input range suitable for a 10-step, 0 to full-scale display (0 V to about 1.25 V full scale).
- External reference options via Ref Out and Ref Adj for scaling and calibration.
- Wide supply range: typically 3 V to 25 V (single-supply operation).
- Outputs are current-regulated and can sink LED current from the supplied LED anodes.
- Pb-free (NOPB) packaging; RoHS-compliant.
- Ideal for LED VU meters, level indicators, and similar display applications.
- 10-channel LED driver with current-sinking outputs (drives LEDs directly).
- Dot or Bar display mode selectable (one LED on or a continuous bar).
- External resistor (Rset) to set the current per LED (wide adjustable range).
- Analog input range suitable for a 10-step, 0 to full-scale display (0 V to about 1.25 V full scale).
- External reference options via Ref Out and Ref Adj for scaling and calibration.
- Wide supply range: typically 3 V to 25 V (single-supply operation).
- Outputs are current-regulated and can sink LED current from the supplied LED anodes.
- Pb-free (NOPB) packaging; RoHS-compliant.
- Ideal for LED VU meters, level indicators, and similar display applications.
Pinout
- Pin count: 18 pins (LM3914V is an 18‑pin package; NOPB = lead-free).
- Function: Ten-channel LED display driver. It provides 10 constant-current outputs to drive LEDs (OUT1–OUT10) in dot or bar mode, driven from a single analog input. The LED current is set by a reference (REF OUT/REF ADJ) with an external resistor. It also includes a MODE pin to switch between dot and bar modes, plus V+ and GND supply pins.
- Function: Ten-channel LED display driver. It provides 10 constant-current outputs to drive LEDs (OUT1–OUT10) in dot or bar mode, driven from a single analog input. The LED current is set by a reference (REF OUT/REF ADJ) with an external resistor. It also includes a MODE pin to switch between dot and bar modes, plus V+ and GND supply pins.
Manufacturer
The LM3914V/NOPB is manufactured by Texas Instruments (TI). TI is an American multinational corporation that designs and manufactures semiconductors and integrated circuits, and is one of the world’s largest semiconductor companies.
Application
LM3914V/NOPB is a 10‑segment LED display driver (dot/bar mode) with adjustable reference. It sinks current through 10 outputs and is used to drive LED bar graphs.
Typical applications:
- Visual analog level indicators (VU/audio meters)
- Battery/power level indicators
- Instrumentation panels and test equipment readouts
- Sensor monitoring (temperature, pressure, humidity) in devices
- Signal‑strength/level indicators in communications gear
In short: any 10‑step LED level display for analog signals.
Typical applications:
- Visual analog level indicators (VU/audio meters)
- Battery/power level indicators
- Instrumentation panels and test equipment readouts
- Sensor monitoring (temperature, pressure, humidity) in devices
- Signal‑strength/level indicators in communications gear
In short: any 10‑step LED level display for analog signals.
Package
LM3914V/NOPB comes in an 18‑pin VSSOP (Very Small Outline) package, Pb‑free (RoHS compliant).
