Texas Instruments LMV7271MG

Overview

LMV7271MG from Texas Instruments is a rail-to-rail input, low-power voltage comparator in SC70-5 package, delivering 9 µA supply current, 880 ns propagation delay (20-mV overdrive), and −0.1 V to +1.9 V input common-mode range at 1.8 V supply. It serves as a precision threshold detector in battery-powered wearables and power-supply monitoring circuits.

For engineers reviewing the LMV7271MG datasheet, LMV7271MG pinout, LMV7271MG application, or LMV7271MG equivalent, this page delivers verified functional identity, validated SC70-5 pin mapping, confirmed 1.8–5.5 V operation, push-pull output behavior, and two technically documented alternative comparators for low-voltage sensing designs.

Technical Context

The LMV7271MG uses paralleled PNP/NPN bipolar input pairs to achieve rail-to-rail input operation from −0.1 V below V− to 0.1 V above V+, with crossover near 950 mV from V+. Its CMOS push-pull output stage eliminates external pull-up resistors and supports rail-to-rail swing, while internal shoot-through current during switching mandates local 0.1 µF bypass capacitance.

It operates across 1.8 V to 5.5 V supply, maintains 4 mV max input offset voltage, 10 nA input bias current, and 200 pA input offset current - all specified over −40°C to +85°C - enabling stable performance in space-constrained, low-noise analog-to-digital conversion paths.

Key Specifications

Pinout & Package

LMV7271MG is housed in a 5-pin SC70 package (1.25 mm × 2.00 mm), optimized for high-density PCB layouts in portable electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV7211DBVR and MAX9021AXK+T, LMV7271MG uniquely balances ultra-low 9 µA supply current, 880 ns speed, and true rail-to-rail input including −0.1 V below GND - making it the only option among the three qualified for precision ground-sensing in battery-fuel-gauge and medical sensor front-ends.

Availability

LMV7271MG is available at Aetrix Electronics and suitable for battery-powered electronics, wearable devices, and low-voltage power monitoring requiring stable component supply and long-term manufacturability.

Supply support for LMV7271MG 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 leader specializing in analog and embedded processing technologies, with decades of expertise in precision signal conditioning and low-power design.

The LMV727x product line was engineered specifically for space-constrained, battery-operated systems demanding rail-to-rail input operation, sub-1 µA quiescent current scalability, and robust performance across 1.8–5.5 V supply rails.

FAQ

What is the maximum operating supply voltage for LMV7271MG?

The LMV7271MG supports a maximum supply voltage of 5.5 V, as specified in the Absolute Maximum Ratings table. Operation beyond this voltage risks permanent damage. At 5.5 V, the device maintains rail-to-rail input range up to V+ + 0.1 V and delivers 4.93 V output high under 0.5 mA load - confirming full functionality across its entire rated supply range. LMV7271MG is therefore suitable for mixed-voltage systems where 3.3 V and 5 V domains coexist.

Does LMV7271MG support true rail-to-rail input below ground?

Yes, LMV7271MG supports input voltages down to −0.1 V relative to V− (GND), verified across all supply voltages (1.8 V, 2.7 V, 5 V) in the Electrical Characteristics tables. This capability is enabled by its dual-input-stage architecture (PNP+NPN), allowing direct connection to ground-referenced signals such as photodiode outputs or shunt voltage monitors without level-shifting. LMV7271MG's −0.1 V minimum VCM is explicitly guaranteed, not typical, ensuring reliability in zero-crossing and battery-monitoring applications.

What output configuration does LMV7271MG use, and how does it affect circuit design?

LMV7271MG features a CMOS push-pull output stage, meaning it actively drives both high (to V+) and low (to GND) without requiring an external pull-up resistor. This reduces component count and board area but introduces brief shoot-through current during transitions, necessitating a local 0.1 µF ceramic bypass capacitor between V+ and GND. LMV7271MG's push-pull architecture differs from open-drain comparators like LMV7275 and enables direct interfacing with CMOS logic inputs, simplifying interface design in portable electronics.

Can LMV7271MG operate reliably at −40°C ambient temperature?

Yes, LMV7271MG is fully specified and tested from −40°C to +85°C. Key parameters including supply current (max 14 µA), input offset voltage (max 6 mV), and propagation delay (tPHL ≤ 1100 ns at 20-mV overdrive) are guaranteed across this full industrial temperature range. The device's bipolar input stage ensures stable bias current and offset drift characteristics at cold temperatures, making LMV7271MG suitable for outdoor wearables, automotive cabin sensors, and industrial handheld instruments exposed to wide thermal swings.

Is LMV7271MG pin-compatible with other comparators in the LMV727x family?

LMV7271MG shares identical pinout with LMV7275MG (both SC70-5), but is not pin-compatible with LMV7272 (DSBGA-8 dual). While LMV7271MG and LMV7275MG have matching +IN, −IN, V+, GND, and output pin positions, their output stages differ: LMV7271MG uses push-pull, whereas LMV7275MG uses open-drain. Swapping them requires modifying the output network (removing pull-up for LMV7271MG, adding it for LMV7275MG). LMV7271MG's pin mapping is validated per TI's DBV/DGK package diagrams and functional pin descriptions.