The LM3914 is a monolithic integrated circuit that detects analog voltage levels and operates ten LEDs to create a linear analog display. With a single pin, the display transforms from a moving dot to a bar graph. The LEDs' current drive is regulated and customizable, removing the need for resistors. This is a feature that allows the entire system to run on less than 3V. The circuit has its own adjustable reference and a 10-step voltage divider that is quite accurate. The low-bias-current input buffer takes signals as low as V and requires no protection against 35V inputs above or below ground. The precision divider is accessed by the buffer, which drives ten separate comparators. Thus, even across a wide temperature range, indication non-linearity can be kept to below 12%.
Pinout
| Pin Number | Pin Name | Description |
| 1 and 10 to 18 | LED1, LED2, LED3.....LED10 | The 10 LEDs which has to be controlled is connected to these pins |
| 2 | V- / Ground | Ground pin of the IC |
| 3 | V+ / Vcc | Supply Voltage (3-18)V |
| 4 | RLO | Low-level voltage for potential divider |
| 5 | Signal | Analog signal Input pin based on which the LED is controlled. |
| 6 | RHI | High-Level voltage for potential divider |
| 7 | REF OUT | Output Reference Voltage for LED current limiting |
| 8 | REF ADJ | Adjust pin for voltage reference |
| 9 | Mode | Select between Dot/Bar Mode |
Features
- Drives LEDs, LCDs or Vacuum Fluorescents Bar or Dot Display Mode Externally Selectable by User
- Expandable to Displays of 100 Steps Internal Voltage Reference from 1.2V to 12V
- Operates with Single Supply of Less than 3V
- Inputs Operate Down to Ground
- Output Current Programmable from 2 mA to 30 mA
- No Multiplex Switching or Interaction Between Outputs
- Input Withstands ±35V without Damage or False Outputs
- LED Driver Outputs are Current Regulated, Open-collectors
- Outputs can Interface with TTL or CMOS Logic
- The Internal 10-step Divider is Floating and can be Referenced to a Wide Range of Voltages
Specification
s| Part Number | LM3914 |
| Supply Voltage | 25V |
| Voltage on Output Drivers | 25V |
| Divider Voltage | ˆ‚¬„¢100mV to V+ |
| Reference Load Current | 10mA |
| Storage Temperature Range | ˆ‚¬„¢55°C to +150°C |
| Output Voltage | 1.2-1.34V |
| LED Current | 7-13mA |
| Dimension | 23x8.2x3.3mm |
FAQs
About Shipping Charges and delivery time
- Standard shipping: Rs 80 /- The order gets delivered within 4-6 working days. (6-7 days in case of the battery as it travels through the surface).
- Free shipping is applicable to the purchase of Rs.999 and above. The order gets delivered within 4-6 working days. (8-10 days in case of the battery as it travels through the surface)
How do I pay for my order?
You can choose from multiple payment options on the checkout page of Electronify India, ensuring a seamless and convenient shopping experience. Payment methods include Credit/Debit Cards, Internet Banking, Mobile Payments, Manual Bank Transfers, and now PhonePe Payment Gateway. Additionally, you can apply discount coupons received from Electronify India or redeem reward points earned from your previous purchases to save even more.
I want to know where is my order?
Once the parcel is ready, packed, and shipped, the customer receives an email or/and SMS about the tracking details. We recommend you use those details to track your order.
Note: For any incorrect delivery status issue, we request the customer to please first check with your neighbors, security guard, and watchman and still you face delivery issue then please call and raise the ticket at info@electronifyindia.com within 48hrs after the incorrect delivery status of the order.
I Need A Quotation for some products
Please submit a ticket with all the details of your requirement and we will be providing you with the quote for the same right away. If the SKUs of the products from electronifyindia.com are mentioned then it would be a lot easier to process your requirement. Please make sure to cover below point
- Name which should appear on quotation with address.
- Required complete product details and quantity.