Texas Instruments LMC7211BIM5

Overview

LMC7211BIM5 from Texas Instruments is a micropower CMOS comparator in SOT-23-5 package, featuring rail-to-rail input voltage range (beyond V− and V+), push-pull output capable of sourcing/sinking ≥4.45V/0.55V at 5V with 5mA load, and 420ns propagation delay (tPLH) at 5V. It operates from 2.7V to 15V supply and draws only 7μA typical supply current, making it ideal for battery-powered sensor interface circuits.

For engineers reviewing the LMC7211BIM5 datasheet, LMC7211BIM5 pinout, LMC7211BIM5 application, or LMC7211BIM5 equivalent, key selection considerations include its 5-pin SOT-23 footprint, 5mV max input offset voltage (LMC7211-NAI grade), rail-to-rail input beyond supply rails, push-pull output eliminating external pull-up, and suitability for low-voltage portable systems requiring micropower analog threshold detection.

Technical Context

The LMC7211BIM5 implements a CMOS input stage enabling rail-to-rail common-mode input range extending 0.3V beyond both supply rails, critical for direct sensing of signals near V+ or ground in single-supply systems. Its push-pull output delivers full logic-level swing without external components across 2.7–15V operation.

It features ultra-low input bias current (0.04pA typical) and high input impedance, supporting high-resistor timing networks and direct interfacing with high-impedance sensors like photodiodes or magnetic sensors. The device is characterized across temperature (−40°C to +85°C) and multiple supply voltages, with guaranteed performance at 2.7V, 5V, and 15V.

Key Specifications

Pinout & Package

SOT-23-5 package with 1.43mm maximum height, 3.05mm × 3.00mm footprint, and standard DBV pinout configuration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMC7221BIM5 and TLV3701DBVR, the LMC7211BIM5 uniquely balances sub-microsecond speed, micropower consumption, and push-pull drive in the smallest possible footprint-making it optimal for space- and response-critical portable electronics where external components must be minimized.

Availability

LMC7211BIM5 is available at Aetrix Electronics and suitable for battery-powered products, optical sensor interfaces, PCMCIA status detection, and zero-crossing detection requiring stable component supply and long-term industrial availability.

Supply support for LMC7211BIM5 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, with leadership in precision analog, power management, and signal chain technologies.

The LMC7211BIM5 belongs to TI's rail-to-rail input micropower comparator product line, designed specifically for space-constrained, battery-operated systems requiring high accuracy, low quiescent current, and robust single-supply operation.

FAQ

What is the maximum supply voltage rating for the LMC7211BIM5?

The LMC7211BIM5 has an absolute maximum supply voltage (V+ – V−) rating of 16V. Continuous operation is specified from 2.7V to 15V. Exceeding 16V risks permanent damage per the Absolute Maximum Ratings table in the datasheet. For reliable long-term operation, maintain supply within the 2.7–15V operating range, especially under temperature extremes.

Does the LMC7211BIM5 support true rail-to-rail input operation?

Yes, the LMC7211BIM5 supports input voltages from V− −0.3V to V+ +0.3V, exceeding the supply rails by 300mV. This is confirmed in the CMVR specifications: at 5V supply, common-mode range is −0.2V to 5.2V (min) and 0.0V to 5.0V (max) depending on grade. This enables direct sensing of signals at or beyond V+ or ground - essential for battery monitoring and zero-crossing detection.

What is the output drive capability of the LMC7211BIM5 at 3.3V supply?

At 3.3V supply, the LMC7211BIM5 push-pull output delivers VOH ≥ 3.0V and VOL ≤ 0.35V at 2.5mA load (extrapolated from 2.7V/5V data). While not explicitly tested at 3.3V, its rail-to-rail output architecture ensures strong logic-level compatibility with 3.3V CMOS/TTL. Output short-circuit current is rated at ±30mA, but continuous operation above 5mA requires thermal consideration.

Is the LMC7211BIM5 pin-compatible with other comparators in SOT-23-5 package?

The LMC7211BIM5 uses standard SOT-23-5 pinout (OUT, −IN, V−, +IN, V+), matching industry convention. It is functionally and physically compatible with LMC7221BIM5 and TLV3701DBVR in the same package, though output topology differs (push-pull vs. open-drain). No PCB redesign is needed when substituting within this pinout family, provided output load and logic interface requirements align.

What is the input offset voltage specification for the LMC7211BIM5?

The LMC7211BIM5 is the "B" grade variant, corresponding to the LMC7211-NBI offset voltage grade. Per the datasheet, its maximum input offset voltage is 15mV at 25°C (with 18mV limit over temperature). This is distinct from the "A" grade (LMC7211AIM5) which specifies 5mV max. Designers selecting LMC7211BIM5 must account for this higher offset in precision threshold applications.