LM4040 Voltage Reference Module 2.048V 4.096V | PCB Board

LM4040 Precision Voltage Reference Source Board — 2.048V & 4.096V

The LM4040 Precision Voltage Reference Module delivers rock-solid, highly accurate reference voltages of 2.048V and 4.096V for your electronics projects. Whether you're calibrating a multimeter, feeding an ADC, or benchmarking a microcontroller, this compact dual-output board gives you the stable, repeatable reference you need — every time.

Key Features

• Dual High-Precision Outputs: Simultaneous 2.048V and 4.096V parallel voltage references on a single compact board
• 750-Ohm Bias Resistor: Onboard resistor ensures stable output under a wide range of load conditions
• LM4040 IC: Industry-trusted shunt voltage reference with tight initial accuracy and low temperature coefficient
• Ultra-Compact Design: Measures just 16 × 13 × 2 mm (0.63 × 0.51 × 0.08 in) — fits easily on any breadboard or PCB
• Plug-and-Play Ready: Pre-assembled board — no soldering of core components required; connect and measure immediately
• Wide Compatibility: Ideal for use with multimeters, ADCs, DACs, Arduino, Raspberry Pi, and other microcontroller platforms
• Durable Black PCB: Clean, professional finish with clearly labeled test pads

Specifications

• Reference IC: LM4040
• Output Voltages: 2.048V / 4.096V
• Bias Resistor: 750 Ω
• Board Dimensions: 16 × 13 × 2 mm
• Color: Black

Who Is This For?

This module is perfect for electronics hobbyists, engineers, students, and makers who need a trustworthy voltage reference for calibration tasks, sensor interfacing, analog-to-digital conversion accuracy, or general lab and bench work. It's an essential building block for any serious electronics toolkit.

Learn More About Voltage References & Electronics Standards

For technical background on measurement accuracy and electronic standards, visit the National Institute of Standards and Technology (NIST) — Electronics.

Frequently Asked Questions

Q: What does the LM4040 Precision Voltage Reference Module do?

A: The LM4040 Precision Voltage Reference Module provides two highly accurate, stable DC reference voltages — 2.048V and 4.096V — from a single compact board. These references are used to calibrate and improve the accuracy of multimeters, analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and microcontroller-based measurement systems.

Q: How do I connect and use the LM4040 Voltage Reference Board?

A: Simply connect the board's power supply pins to a suitable DC input voltage (typically 5V or higher, as required by the LM4040 with the onboard 750-ohm bias resistor), and then measure the 2.048V or 4.096V output at the corresponding labeled pads. The board is pre-assembled and ready to use with breadboards, jumper wires, or direct PCB integration — no additional component soldering needed.

Q: Is this module compatible with Arduino and Raspberry Pi?

A: Yes. The LM4040 Voltage Reference Module is fully compatible with Arduino, Raspberry Pi, and other popular microcontroller and single-board computer platforms. The 2.048V and 4.096V outputs are especially well-suited for use as the reference voltage input on ADC chips commonly used with these platforms, improving measurement precision significantly.

Q: What is the advantage of having both 2.048V and 4.096V outputs?

A: The dual outputs give you flexibility for different applications. The 2.048V reference is ideal for 12-bit ADC systems where a mid-range reference improves resolution, while the 4.096V reference closely matches a 1mV-per-bit scale for many 12-bit ADCs — making calculations straightforward. Having both on one board saves space and cost.