onsemi LMV393DR2G

LMV393DR2G Dual Comparator Product Summary

The LMV393DR2G from onsemi is a dual, general-purpose, low voltage comparator that stands out for its combination of low supply operation, power efficiency, and robust input common-mode range. Designed using CMOS technology, the LMV393DR2G targets a wide array of applications in portable electronics, battery-powered systems, and general low voltage circuit solutions. The integrated circuit is housed in an 8-pin SOIC package, catering to standard mounting and handling practices in the electronics industry.

This device is part of the LMV331/393/339 family, with the LMV393DR2G being the dual-channel version. It compares two analog input voltages and generates an open-drain digital output, making it an essential building block for signal interfacing, voltage monitoring, or simple logical decision-making in hardware.

LMV393DR2G Dual Comparator Main Attributes

The LMV393DR2G boasts several features that make it suitable for compact, energy-efficient, and high-performance designs:

Wide supply voltage range: operation is guaranteed from 2.7 V to 5.0 V, allowing compatibility with today’s logic circuits and portable systems.

Input common-mode voltage range includes ground, facilitating low-side sensing and improved design flexibility without additional biasing.

Open-drain output configuration supports wired-OR connections and easy interfacing to both logic and analog circuits.

Exceptionally low quiescent current, typically 60 μA per comparator channel at 5 V, enables operation in power-critical applications.

Fast propagation delay (200 ns, typical at 5 V) ensures rapid response times necessary for precision monitoring and high-speed switching applications.

Low output saturation voltage (200 mV, typical at 5 V), contributing to greater output drive capability and lower voltage losses in outputs.

RoHS, halogen-free, and lead-free compliance supports green product initiatives; AEC-Q100 qualification makes the LMV393DR2G suitable for automotive and industrial environments.

LMV393DR2G Dual Comparator Electrical Specifications and Standard Performance

The LMV393DR2G demonstrates consistent and reliable performance over a broad operating range:

At 2.7 V supply voltage, all electrical parameters are guaranteed, with input offset voltages, supply currents, and output swing optimized for reliable low voltage operation.

At 5.0 V supply, the device provides enhanced performance with maintained low quiescent consumption and extended output drive capability.

Input offset voltage and bias current are tightly controlled and characterized, ensuring accurate switching thresholds and minimal drift across temperature.

Output stage characteristics, including low saturation voltage and drive strength, are ideal for directly driving discrete loads or interfacing with logic families.

The LMV393DR2G is designed to remain stable across variations in supply, input range, and load conditions.

Graphs and figures from the technical data illustrate how supply current varies with output state and supply voltage, and how output saturation voltage holds up over increased output current at both 2.7 V and 5.0 V supplies.

LMV393DR2G Dual Comparator Application Guidelines and Circuit Design Tips

The LMV393DR2G’s functionality as a comparator makes it fundamental for decision-making circuits, including:

Battery monitoring in portable equipment, ensuring proper system operation under varying input supplies.

Level-shifting and zero-crossing detection in measurement and interface circuits.

Implementation in power-sensitive applications such as notebooks, PDAs, and handheld devices, where low current draw is essential.

The open-drain output architecture requires an external pull-up resistor (typically between 1 kΩ and 10 kΩ) to define the logic high state. Selecting the pull-up resistor involves balancing speed (lower resistance for faster response) and power consumption (higher resistance for lower power).

To ensure noise-immune operation, especially with slow or small input transitions, designers can implement external hysteresis using resistor networks. This minimizes output chatter near the switching threshold and enhances comparator stability.

Unused comparator channels should not be left floating; it is best practice to connect one input to VCC and the other to ground, preventing unwanted oscillations or unpredictable outputs.

LMV393DR2G Dual Comparator Package Information and Mechanical Specifications

The LMV393DR2G is available in the industry-standard SOIC-8 package, supporting automated assembly and robust mechanical performance. The SOIC-8 form factor offers good space efficiency for dual-channel circuits.

The LMV393 family provides a range of package options to suit various layout, size, and mounting requirements—such as Micro8, UDFN8, TSOP-5, and SC-70 for the single (LMV331) or quad (LMV339) variants. Each package conforms to RoHS and Pb-free standards and is dimensionally standardized to support mainstream PCB designs.

Detailed mechanical drawings are available for precise footprint and soldering requirements, assisting procurement and layout engineers with accurate implementation.

Alternative and Compatible Models for LMV393DR2G Dual Comparator

The dual-channel LMV393DR2G is closely related to other members of the same comparator family. For design flexibility or supply continuity, engineers and procurement specialists may consider:

LMV331: Single-channel version available in compact packages (SC-70, TSOP-5).

LMV339: Quad-channel version, suitable for designs requiring multiple comparator stages, in larger SOIC-14 and TSSOP-14 packages.

NCV331: Automotive-qualified single comparator, designated for extended temperature operation up to 125°C and subject to additional production controls.

In case of footprint or functionality constraints, other general-purpose low voltage comparators with similar input and output structures could also be evaluated, but the LMV331/393/339 family ensures direct substitution, electrical compatibility, and supply consistency within the onsemi portfolio.

Conclusion

The LMV393DR2G dual comparator from onsemi offers a compelling solution for designers seeking a versatile, low voltage, low power comparator in a reliable small-footprint package. Its robust feature set, stable performance, and comprehensive packaging options make it ideal for modern portable, battery-powered, and space-sensitive applications. With considerations for noise immunity, ease of use, and compatibility for direct replacements, the LMV393DR2G stands out as a recommended choice for engineers and procurement teams focused on efficiency, flexibility, and long-term product support.