LM4040DIM3-4.1

LM4040DIM3-4.1 is TI’s fixed 4.1 V shunt voltage reference in the LM4040 family. It acts as a precision two-terminal shunt regulator: when fed through a supply resistor, it clamps its terminals at about 4.1 V by drawing current within its specified range. This provides a simple, low-noise voltage reference for ADCs/DACs, precision regulators, and microcontroller supplies.
Key points:
- Fixed 4.1 V output with low dynamic impedance and good temperature performance for a reference.
- Easy to use: Vcc -> resistor -> LM4040 -> ground; no external divider needed.
- Available in small SMD packages (e.g., SOT‑23/SC‑70 variants).
Design tip:
- Choose the bias resistor so the device operates between its Imin and Imax across temperature and supply variation.
For exact specs (Imin/Imax, tolerance, noise, temp coefficient, packaging), consult the LM4040DIM3-4.1 datasheet.

The LM4040DIM3-4.1 is TI’s 4.1 V shunt voltage reference in a DIM3 package. Direct equivalents are other vendors’ fixed 4.1 V shunt references in the same package. To give exact cross-references (Onsemi, ST, ROHM, etc.), please specify your preferred supplier and package/tolerance, and I’ll provide a drop‑in replacement list.

- Pin count: 3 pins (SOT-23 DIM3 package).
- Function: Fixed 4.1 V shunt voltage reference diode (precision reference) used to clamp and provide a stable 4.1 V reference by shunting excess current to ground.

- Manufacturer: Texas Instruments (TI).
- What kind of company: American multinational semiconductor company that designs and manufactures analog and mixed-signal ICs, microcontrollers, processors, and related electronics products. It is one of the largest semiconductor companies in the world.

LM4040DIM3-4.1 is a fixed shunt voltage reference (about 4.1 V). Common applications include:
- Precision reference for ADC/DAC front-ends in instrumentation and portable electronics
- Biasing/offset reference for op-amps, comparators, and regulators in single-supply systems
- Calibration/reference source for sensors, handheld meters, and data loggers
- Simple, low‑power shunt regulator in battery-powered designs
- Reference for supervisory circuits and voltage monitors
These uses take advantage of its good line/load regulation and low drift in single-supply environments.

The LM4040DIM-4.1 is in a 3-pin SOT-23 package (SOT-23-3).