Texas Instruments LMV7275MG

Overview

LMV7275MG from Texas Instruments is a single-channel, rail-to-rail input, low-power comparator with open-drain output, specified for 1.8 V to 5.5 V supply operation, 9 µA typical supply current, 880 ns propagation delay (20-mV overdrive), and −0.1 V to V₊ + 0.1 V input common-mode range. It enables level-shifting and wired-OR logic in battery-powered sensing circuits.

For engineers reviewing the LMV7275MG datasheet, LMV7275MG pinout, LMV7275MG application, or LMV7275MG equivalent, key selection criteria include open-drain output compatibility with 5.5 V pull-up, ultra-low quiescent current for multi-year battery life, rail-to-rail input beyond supply rails, and guaranteed 4 mV max input offset voltage across temperature.

Technical Context

The LMV7275MG uses a BiCMOS process with paralleled PNP/NPN input stages to achieve rail-to-rail input operation extending 0.1 V beyond both supply rails. Its crossover point near 950 mV below V₊ creates V_OS dependence on common-mode voltage, requiring design attention in precision threshold applications.

Unlike the push-pull-output LMV7271/LMV7272, the LMV7275MG implements an open-drain NMOS output stage-omitting the PMOS pull-up-enabling flexible external pull-up to voltages up to 5.5 V independent of V₊, supporting level translation and bus-wired-OR configurations.

Key Specifications

Pinout & Package

LMV7275MG is housed in a 5-pin SC70 package (1.25 mm × 2.00 mm) optimized for space-constrained portable electronics.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar comparator applications.

Compared with LMV7275MG, TLV7211DBVR offers higher speed but lacks level-shifting capability, while MAX9021AXK+T achieves lower current at the cost of 4× longer propagation delay-making LMV7275MG the balanced choice for battery-powered systems needing both speed and interface flexibility.

Availability

LMV7275MG is available at Aetrix Electronics and suitable for wearable devices, mobile phone subsystems, and battery-powered electronics requiring stable component supply across long production lifecycles.

Supply support for LMV7275MG includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The LMV727x family was designed specifically for low-voltage, low-power, space-constrained applications such as portable medical devices, wearables, and energy-harvesting sensors-prioritizing rail-to-rail input, nanoamp quiescent current, and flexible output topologies.

FAQ

What is the maximum allowable pull-up voltage for the LMV7275MG open-drain output?

The LMV7275MG open-drain output supports external pull-up voltages up to 5.5 V, regardless of its own V+ supply voltage. This enables reliable level shifting between domains-for example, pulling up to 3.3 V while operating from 1.8 V. The output leakage current remains ≤2 pA at 5 V, ensuring minimal static power draw in high-impedance configurations. Always verify pull-up resistor value to limit sink current within the 15 mA absolute maximum rating.

Does the LMV7275MG support true rail-to-rail input operation, and what does "beyond rails" mean?

Yes, the LMV7275MG supports true rail-to-rail input operation with a common-mode range from −0.1 V to V+ + 0.1 V. "Beyond rails" means it accepts input voltages slightly below ground or slightly above the positive supply-critical for detecting battery end-of-life (e.g., 0 V cell) or overvoltage events. This is achieved via paralleled PNP/NPN input stages, though V_OS varies near the 950 mV crossover point, so designs should avoid that region for highest accuracy.

How does supply voltage affect propagation delay in the LMV7275MG?

Propagation delay in the LMV7275MG increases with lower supply voltage: 880 ns at 1.8 V (20-mV overdrive), 1300 ns at 2.7 V, and 1800 ns at 5 V. This inverse relationship occurs because internal transconductance decreases at lower V_DD, slowing internal node charging. For time-critical applications, select 2.7 V or higher supply if delay <1.5 µs is required; at 1.8 V, the LMV7275MG remains suitable for wake-up and supervisory functions where microsecond response is acceptable.

Can the LMV7275MG be used with a single-ended input configuration, and how is the reference applied?

Yes, the LMV7275MG operates reliably in single-ended mode: tie one input (e.g., −IN) to a stable reference voltage (e.g., from resistor divider or bandgap), and apply the sensed signal to the other input (+IN). The rail-to-rail input range allows referencing to ground or V+, and the 10 nA input bias current minimizes divider loading error. For best stability, use low-impedance references (<10 kΩ) and add 100 pF bypass capacitance near the reference node to suppress noise-induced chatter.

What thermal considerations apply to the LMV7275MG in SC70 packaging?

The LMV7275MG in SC70 has a junction-to-ambient thermal resistance (R_θJA) of 265°C/W. At 9 µA supply current and 1.8 V, power dissipation is ~16 nW-negligible for thermal rise. However, under worst-case output short-circuit conditions (15 mA sink), power can reach 27 mW, raising junction temperature by ~7°C above ambient. Ensure adequate copper pour and avoid placement near heat sources; no heatsinking is required for normal operation, but layout must maintain >0.2 mm clearance to adjacent thermal planes per TI layout guidelines.