LM4050AIM3-2.5

The LM4050AIM3-2.5 is a fixed 2.5-volt shunt voltage reference from Texas Instruments. It is a two-terminal (plus a case pin) regulator that sinks current to hold its output at a precise 2.5 V, providing a stable reference for converters, ADCs, DACs, and precision circuits. Key points:
- Fixed output: +2.5 V reference with tight accuracy and good temperature stability.
- Low dynamic impedance: maintains regulation under load changes.
- Simple, two-terminal/shunt design: no external resistor network needed for the reference itself (current is set by your bias network).
- Package: AIM3 (SOT-23-3) for compact designs.
- Applications: voltage reference for ADC/DAC, precision measurement, power-supply regulation, and reference biasing.
How to use: connect the anode to ground, the cathode to the reference node through a supply-limited resistor (to set the required cathode current for regulation), and optionally add a bypass capacitor for noise reduction. For exact electrical specs (tolerance, tempco, operating current, max ratings), consult the TI datasheet.

Key features of LM4050AIM3-2.5:
- Fixed 2.5 V shunt voltage reference
- Low dynamic impedance
- Low-noise reference output
- Tight initial accuracy with low temperature drift
- Micropower operation (low quiescent current)
- Wide supply and operating temperature range (typically -40°C to 125°C)
- Robust performance with line/load changes
- Available in 8-pin package (MSOP-inspired AIM3 package)
Note: It is a fixed-reference shunt regulator suitable for precision voltage reference applications (e.g., ADC references, sensor circuits).

SOT-23-3 (SC-70) 3-pin package.

The LM4050AIM3-2.5 is supplied in a 3-pin SOT-23 package (3 pins). Its functional pins are:
- Anode: the reference negative/ground terminal
- Cathode: the reference output (2.500 V above the anode when operating as a shunt)
- Third pin: not used for the reference function (package/no‑connect or substrate/thermal tie depending on board layout)
In short: 3 pins, two functional (anode and cathode forming the 2.5 V shunt reference) and one unused/NC/thermal pin. For exact pin numbering on the package, consult the device datasheet.

- Manufacturer: Texas Instruments (TI).
- What kind of company: American multinational technology company that designs, manufactures, and sells semiconductors and related analog/mixed-signal integrated circuits.

LM4050AIM3-2.5 is a 2.5 V shunt voltage reference. Common applications:
- Precision reference for ADCs and DACs
- Bias/reference for op-amps and instrumentation amplifiers
- Stable 2.5 V rail for portable/battery-powered electronics
- Reference/threshold for comparators and voltage regulators
- Sensor front-ends and calibration networks
- Any design needing a low-drift fixed 2.5 V reference

Common equivalents for the LM4050AIM3-2.5 (2.5 V shunt/voltage reference) include: TI LM4040AIM3-2.5, Analog Devices ADR4525/ADR3525 (2.5 V fixed refs), and Microchip MCP1525/MCP1541 (fixed 2.5 V refs). TLV431/TL431 (adjustable shunt) can be used with a resistor divider. Always verify tolerance, temperature coefficient, dynamic impedance, package/pinout and bias current before substituting.