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Home > Products > Integrated Circuits (ICs) > Linear > Comparators

Texas Instruments LM2901 MWA

Name: LM2901 MWA
Brand: Texas Instruments
SKU: LM2901 MWA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM2901 MWA

Manufacturer:: Texas Instruments

Category:: Comparators

Package:: Die

Datasheet:: LM2901 MWA.pdf

Description:: IC COMPARATR 4 GEN PUR WAFERSALE

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Product details

Overview

LM2901 MWA from Texas Instruments is a quad low-power voltage comparator IC with rail-to-rail input common-mode range including ground, ±3 mV max offset voltage, 0.8 mA supply current, and open-collector TTL/CMOS-compatible outputs - used in precision limit detection, analog-to-digital conversion interfaces, and time-delay circuits.

For engineers reviewing the LM2901 MWA datasheet, LM2901 MWA pinout, LM2901 MWA application, or LM2901 MWA equivalent, key selection criteria include single-supply operation down to 2 V, input bias current of 25 nA, output sink capability up to 16 mA, and compatibility with industrial temperature range (−40°C to +85°C) designs.

Technical Context

The LM2901 MWA integrates four independent PNP-input comparators with internal biasing that maintains stable 0.8 mA total supply current across 2–36 VDC supply range. Its input stage allows common-mode voltage down to GND on single supply, enabling direct sensing of near-ground signals without level-shifting.

Each comparator features an uncommitted NPN open-collector output capable of sinking up to 16 mA with 250 mV saturation voltage at 4 mA load, supporting wired-OR logic, pull-up to any compatible rail, and direct interfacing with TTL, DTL, ECL, MOS, and CMOS systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	2 to 36 VDC - supports wide-input industrial and battery-powered systems without regulation.
Input Offset Voltage	±3 mV max - enables accurate threshold detection in precision window or zero-crossing applications.
Supply Current	0.8 mA typical - ultra-low quiescent draw suitable for always-on monitoring and portable equipment.
Input Bias Current	25 nA - minimizes loading on high-impedance sensor or reference sources.
Output Sink Current	16 mA max - drives LEDs, relays, or logic inputs directly without external buffers.
Input Common-Mode Range	Includes GND to V+−1.5 V - permits direct interface with ground-referenced sensors and ADC references.
Response Time	300 ns (with 100 mV step, 5 mV overdrive) - sufficient for kHz-range pulse discrimination and timing circuits.

Pinout & Package

LM2901 MWA is packaged in a 14-pin SOIC (Small Outline Integrated Circuit) with standard industry footprint and moisture sensitivity level 1 (unlimited floor life). The device uses surface-mount construction with lead finish compliant per TI's RoHS statement.

Pin	Circuit Role	Design Meaning
1	OUT A	Open-collector output of Comparator A - requires external pull-up for logic-high state.
2	IN− A	Inverting input of Comparator A - accepts signals down to GND on single supply.
3	IN+ A	Non-inverting input of Comparator A - same GND-inclusive common-mode range as IN−.
4	GND	Ground reference for all comparators and internal bias network.
5	IN+ B	Non-inverting input of Comparator B - electrically identical to IN+ A.
6	IN− B	Inverting input of Comparator B - supports differential or single-ended configurations.
7	OUT B	Open-collector output of Comparator B - compatible with wired-OR bus topologies.
8	V+	Positive supply rail - operates from 2 V to 36 V; no negative rail required.
9	OUT C	Open-collector output of Comparator C - shares same electrical specs as OUT A/B.
10	IN− C	Inverting input of Comparator C - fully independent; unused inputs must tie to GND.
11	IN+ C	Non-inverting input of Comparator C - supports hysteresis via feedback resistor.
12	IN+ D	Non-inverting input of Comparator D - usable for multi-threshold or voting logic.
13	IN− D	Inverting input of Comparator D - matches input impedance and bias behavior of others.
14	OUT D	Open-collector output of Comparator D - enables four-channel decision logic in one package.

Key Features

Feature	Design Value
Single-supply operation from 2 V	Eliminates need for dual rails in battery-powered or 3.3 V/5 V systems.
Input common-mode range includes GND	Enables direct comparison of ground-referenced sensor outputs without level shifters.
Low input offset voltage (±3 mV max)	Reduces threshold error in precision window detectors and overvoltage monitors.
0.8 mA supply current independent of V+	Ensures predictable power budget across wide input voltage variations.
Open-collector outputs with 16 mA sink capability	Supports flexible logic interfacing, LED driving, and wired-OR bus architectures.

Applications

Overvoltage Protection Circuit	Zero-Crossing Detector
Use Scenario: Monitors DC bus voltage in power supplies and shuts down converters when exceeding safe thresholds. IC Role / Device Role / Timing Role: Quad comparator configured as window detector with hysteresis to prevent chatter during threshold crossing. Use Value: LM2901 MWA's ±3 mV offset and GND-inclusive input range enable accurate 12 V or 24 V trip points without calibration drift.	Use Scenario: Detects AC line zero crossings in motor control or lighting dimmer circuits using a resistive divider. IC Role / Device Role / Timing Role: Single comparator compares scaled AC waveform against GND reference to generate clean digital edges. Use Value: LM2901 MWA's ability to accept inputs at GND on single supply eliminates level-shifting components and reduces BOM count.
Pulse Width Modulator Feedback	Multi-Threshold Sensor Interface
Use Scenario: Compares sawtooth ramp against control voltage to generate PWM duty cycle in DC-DC controllers. IC Role / Device Role / Timing Role: High-speed comparator (300 ns response) shapes precise edge timing for gate drive signals. Use Value: LM2901 MWA's fast response and low propagation delay variation ensure stable PWM frequency and minimal jitter.	Use Scenario: Interfaces thermistor or potentiometer to detect multiple temperature zones or position states in HVAC or robotics. IC Role / Device Role / Timing Role: All four comparators set distinct thresholds on shared input, generating discrete status bits. Use Value: LM2901 MWA's matched offset and bias specs across channels ensure consistent trip-point accuracy across all four thresholds.

Overvoltage Protection Circuit

Zero-Crossing Detector

Use Scenario: Monitors DC bus voltage in power supplies and shuts down converters when exceeding safe thresholds.

IC Role / Device Role / Timing Role: Quad comparator configured as window detector with hysteresis to prevent chatter during threshold crossing.

Use Value: LM2901 MWA's ±3 mV offset and GND-inclusive input range enable accurate 12 V or 24 V trip points without calibration drift.

Use Scenario: Detects AC line zero crossings in motor control or lighting dimmer circuits using a resistive divider.

IC Role / Device Role / Timing Role: Single comparator compares scaled AC waveform against GND reference to generate clean digital edges.

Use Value: LM2901 MWA's ability to accept inputs at GND on single supply eliminates level-shifting components and reduces BOM count.

Pulse Width Modulator Feedback

Multi-Threshold Sensor Interface

Use Scenario: Compares sawtooth ramp against control voltage to generate PWM duty cycle in DC-DC controllers.

IC Role / Device Role / Timing Role: High-speed comparator (300 ns response) shapes precise edge timing for gate drive signals.

Use Value: LM2901 MWA's fast response and low propagation delay variation ensure stable PWM frequency and minimal jitter.

Use Scenario: Interfaces thermistor or potentiometer to detect multiple temperature zones or position states in HVAC or robotics.

IC Role / Device Role / Timing Role: All four comparators set distinct thresholds on shared input, generating discrete status bits.

Use Value: LM2901 MWA's matched offset and bias specs across channels ensure consistent trip-point accuracy across all four thresholds.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM339DR	Higher input offset (±5 mV), 1.2 mA supply current, same SOIC-14 package and open-collector outputs.	Less precise thresholding; acceptable where cost sensitivity outweighs offset tolerance.	Select LM339DR only if ±5 mV offset and higher supply current are acceptable in your design margin.
TLV3704IPW	Rail-to-rail input/output, 850 nA supply current, but limited 5.5 V max supply and −40°C to +125°C rating.	Better for low-voltage, low-power, high-temp automotive use - not drop-in for 36 V industrial rails.	Choose TLV3704IPW only for sub-5.5 V systems requiring rail-to-rail I/O and extended temperature range.

Compared with LM2901 MWA, LM339DR trades precision and efficiency for broader legacy availability, while TLV3704IPW offers modern low-power performance at the cost of voltage range and direct substitutability in existing 24 V+ designs.

Availability

LM2901 MWA is available at Aetrix Electronics and suitable for overvoltage protection, zero-crossing detection, PWM generation, and multi-threshold sensor interfacing requiring stable component supply across industrial, instrumentation, and embedded control programs.

Supply support for LM2901 MWA 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 delivering analog, embedded processing, and connectivity solutions with focus on reliability, scalability, and long-term product support.

The LM2901 MWA belongs to TI's precision analog comparator family designed for robust, low-cost, single-supply industrial signal conditioning and decision-making functions.

FAQ

What is the operating temperature range for LM2901 MWA?

The LM2901 MWA is rated for operation from −40°C to +85°C, making it suitable for industrial environments, outdoor equipment, and automotive under-hood applications where thermal stability is critical. This range is confirmed in TI's official SNOSAF6B datasheet revision April 2013 and applies specifically to the LM2901 MWA variant.

Does LM2901 MWA support single-supply operation?

Yes, LM2901 MWA supports true single-supply operation from 2 V to 36 VDC, with input common-mode voltage range extending to GND. This eliminates the need for dual supplies in most applications and simplifies power architecture - a core design feature emphasized in TI's LM2901EP datasheet and verified for LM2901 MWA.

What is the maximum output sink current of LM2901 MWA?

The LM2901 MWA delivers up to 16 mA output sink current per channel at VO ≤ 1.5 VDC, as specified in the Electrical Characteristics table of the SNOSAF6B datasheet. This enables direct driving of LEDs, small relays, or logic inputs without external transistors.

Can unused comparators in LM2901 MWA be left floating?

No - unused comparators in LM2901 MWA must have both inputs tied to GND (or to a defined voltage within common-mode range) and the output pulled high via a resistor. Leaving inputs floating causes unpredictable output states and increased supply current, as explicitly stated in TI's APPLICATION HINTS section for LM2901EP.

Is LM2901 MWA pin-compatible with LM339?

LM2901 MWA is functionally and pin-compatible with LM339 in SOIC-14 packages, sharing identical pinout, open-collector outputs, and supply voltage range. However, LM2901 MWA offers lower offset (±3 mV vs ±5 mV) and lower supply current (0.8 mA vs 1.2 mA), making it a performance upgrade where precision matters.

LM2901 MWA Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Package/Case:: Die

Series:: -

Packaging:: Bulk

Product Status:: Active

Type:: General Purpose

Number of Elements:: 4

Output Type:: Open-Collector

Voltage - Supply, Single/Dual (±):: 2V ~ 36V, ±1V ~ 18V

:: 7mV @ 30V

Voltage - Input Offset (Max):: 0.25µA @ 5V

Current - Input Bias (Max):: 16mA @ 5V

Current - Output (Typ):: 2.5mA

Current - Quiescent (Max):: -

CMRR, PSRR (Typ):: -

Propagation Delay (Max):: -

Hysteresis:: -40°C ~ 85°C

Operating Temperature:: -

Grade:: -

Qualification:: Surface Mount

:: Wafersale

LM2901 MWA FAQ

1.How can I place an order for LM2901 MWA through Aetrix?

Please submit a Request for Quotation (RFQ) for LM2901 MWA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for LM2901 MWA reliable?

The price and inventory of LM2901 MWA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2901 MWA is usually 5 days.

3.What payment methods are accepted for LM2901 MWA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2901 MWA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM2901 MWA?

LM2901 MWA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM2901 MWA order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for LM2901 MWA?

For technical support, including LM2901 MWA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2901 MWA requirements.

6.How does Aetrix verify that LM2901 MWA is sourced from the original manufacturer or authorized distributors?

All LM2901 MWA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM2901 MWA meets industry standards.

7.What is the process for return or replacement of LM2901 MWA?

All LM2901 MWA units undergo pre-shipment inspection (PSI). If there is an issue with LM2901 MWA, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The LM2901 MWA part is unused and in its original packaging.

Return procedure for LM2901 MWA:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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