My Inquiry
My Account
Texas Instruments LM2901DRG3
- Part No.:
- LM2901DRG3
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2901DRG3.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:977
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM2901DRG3 from Texas Instruments is a quad differential comparator IC designed for single-supply operation across 2 V to 36 V, featuring ±0.37 mV typical input offset voltage, 200 µA per comparator quiescent current, 1 µs propagation delay, and rail-to-rail common-mode input range including ground - used in motor drive feedback, server PSU overvoltage detection, and industrial sensor thresholding.
For engineers reviewing the LM2901DRG3 datasheet, LM2901DRG3 pinout, LM2901DRG3 application, or LM2901DRG3 equivalent, this page delivers verified electrical specs, SOIC-14 package details, real-world use cases in power management and automation, and two confirmed alternative comparators with documented functional and thermal differences.
Technical Context
The LM2901DRG3 implements four independent open-collector comparators with internal ESD clamps (2 kV HBM), enabling robust operation in noisy industrial environments. Its input stage supports differential voltages up to ±38 V and common-mode inputs down to ground, while output stages sink up to 21 mA per channel with low saturation voltage (≤400 mV at 4 mA).
It operates across –40°C to +125°C ambient temperature, with supply current stable over voltage (0.8–1.6 mA total) and input bias current as low as 3.5 nA (typ). The device is not internally compensated and requires no external components for basic comparator operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - enables direct interface with 3.3 V, 5 V, 12 V, and 24 V systems without level-shifting. |
| Input Offset Voltage (max) | ±5.5 mV over –40°C to +125°C - ensures accurate threshold detection in wide-temperature industrial applications. |
| Propagation Delay | 1 µs (typ) at 5 V - supports fast response in overcurrent protection and PWM timing circuits. |
| Input Bias Current (typ) | 3.5 nA - minimizes loading on high-impedance sensor sources like thermistors or photodiodes. |
| Output Sink Current | 21 mA per channel - drives standard LEDs, relays, or logic gates directly without external buffers. |
| ESD Rating (HBM) | 2000 V - meets IEC 61000-4-2 Level 2 requirements for handling robustness in manufacturing and field service. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, motor control, and industrial embedded use. |
Pinout & Package
LM2901DRG3 is housed in a 14-pin SOIC (D) package measuring 8.70 mm × 3.90 mm, with gull-wing leads, surface-mount compatible footprint, and JEDEC MS-012 compliant outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Comparator 1 output | Open-collector output - requires external pull-up to define logic HIGH level and interface with TTL/CMOS/MOS loads. |
| 2 (OUT2) | Comparator 2 output | Independent open-collector node - allows wired-OR logic or multi-source alarm aggregation. |
| 3 (VCC) | Positive supply | Single-supply input - powers all four comparators; accepts 2–36 V with no negative rail required. |
| 4 (IN2–) | Comparator 2 inverting input | Differential input pair - accepts signals down to ground; tolerant of overvoltage up to VCC + 0.3 V. |
| 5 (IN2+) | Comparator 2 non-inverting input | Paired with Pin 4 - forms precision threshold comparison path with <5.5 mV max offset error. |
| 6 (IN1–) | Comparator 1 inverting input | Shared input structure - electrically identical to Pin 4; interchangeable in layout per TI pin function table. |
| 7 (IN1+) | Comparator 1 non-inverting input | Paired with Pin 6 - supports rail-to-rail common-mode range (V– to VCC – 2 V) for sensor interfacing. |
| 8 (IN3–) | Comparator 3 inverting input | Third comparator input - enables three-level monitoring (e.g., under/normal/over voltage) in compact space. |
| 9 (IN3+) | Comparator 3 non-inverting input | Paired with Pin 8 - maintains same offset and bias specs as other channels for consistent system behavior. |
| 10 (IN4–) | Comparator 4 inverting input | Fourth independent input - supports redundant sensing or multi-zone thermal monitoring. |
| 11 (IN4+) | Comparator 4 non-inverting input | Paired with Pin 10 - completes full quad functionality with identical AC/DC performance across all channels. |
| 12 (GND) | Negative supply / reference | Ground return for all comparators - must be low-impedance; ties to system 0 V plane for noise immunity. |
| 13 (OUT4) | Comparator 4 output | Final open-collector output - enables discrete fault signaling or cascaded logic without additional ICs. |
| 14 (OUT3) | Comparator 3 output | Third output node - supports parallel alarm outputs or dual-threshold latching configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Includes ground and extends to VCC – 2 V - eliminates need for input biasing resistors in single-supply sensor interfaces. |
| Low quiescent current (200 µA per comparator) | Enables always-on monitoring in battery-backed or energy-constrained systems without significant standby drain. |
| Fast 1 µs propagation delay | Supports real-time response in motor stall detection, DC bus overvoltage shutdown, and digital power sequencing. |
| 2 kV HBM ESD rating | Reduces risk of field failure during handling or in electrostatic-prone factory automation environments. |
| Drop-in replacement for LM2901/LM339 | Pin- and function-compatible with legacy designs - allows B-version upgrade without PCB revision or firmware change. |
Applications
| Motor Drive Feedback | Server PSU Monitoring |
|---|---|
Use Scenario: Detect rotor lock or phase loss by comparing back-EMF zero-crossings against reference thresholds in BLDC motor controllers. IC Role / Device Role / Timing Role: Quad comparator performs simultaneous voltage window checking and direction sensing on three-phase signals. Use Value: Enables precise commutation timing and immediate fault shutdown within 1 µs, preventing MOSFET shoot-through and thermal damage. | Use Scenario: Monitor +12 V, +5 V, and +3.3 V rails in redundant server power supplies for out-of-spec condition detection. IC Role / Device Role / Timing Role: Four independent comparators generate separate fault flags for each rail using precision resistor-divider references. Use Value: Delivers sub-5 mV threshold accuracy and rail-to-rail input capability - eliminating external op-amps and reducing BOM count by 3 devices per PSU. |
| Industrial Sensor Interface | Building Automation Control |
Use Scenario: Condition analog outputs from RTD, thermistor, or pressure transducers before digitization in PLC analog input modules. IC Role / Device Role / Timing Role: Comparator acts as hardware-based over-temperature or over-pressure latch with hysteresis via external feedback. Use Value: Provides deterministic, zero-latency trip response independent of microcontroller load - critical for SIL-2 safety functions. | Use Scenario: Implement occupancy-based HVAC staging by comparing PIR sensor outputs against adjustable light/temperature thresholds. IC Role / Device Role / Timing Role: Quad comparator handles multi-sensor fusion: motion, ambient light, CO₂, and humidity thresholds in one IC. Use Value: Reduces board area by 60% vs. discrete solutions and lowers system cost by consolidating four comparator functions into a single SOIC-14 package. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2901DT | Same SOIC-14 package and B-version specs, but rated only to +85°C ambient (vs. +125°C for LM2901DRG3). | Suitable for commercial-grade equipment; not recommended for under-hood or high-temp industrial enclosures. | Select LM2901DT only when thermal derating is acceptable and cost sensitivity outweighs extended temperature need. |
| LM339BDR | Identical electrical specs and SOIC-14 package, but rated for –40°C to +85°C (not +125°C); shares same 2 kV HBM and 1 µs delay. | Valid for consumer electronics and telecom infrastructure where ambient stays below 85°C. | Choose LM339BDR if design operates exclusively in controlled environments and requires lower qualification cost. |
Compared with LM2901DT and LM339BDR, the LM2901DRG3 uniquely supports full industrial temperature range (–40°C to +125°C) while retaining identical pinout, speed, and power efficiency - making it the only drop-in solution for high-reliability motor control and power conversion designs requiring extended thermal margin.
Availability
LM2901DRG3 is available at Aetrix Electronics and suitable for motor drive feedback, server PSU monitoring, and industrial sensor interface applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LM2901DRG3 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 technologies for industrial, automotive, and communications markets.
The LM2901DRG3 belongs to TI's precision comparator product line, engineered specifically for robust single-supply operation in harsh environments - targeting power management, factory automation, and motor control systems demanding reliability across extreme temperatures.
FAQ
What is the maximum supply voltage rating for LM2901DRG3?
The LM2901DRG3 has an absolute maximum supply voltage of 38 V, with recommended operating range from 2 V to 36 V. This allows direct integration into 24 V industrial systems and 36 V battery-powered equipment without external regulation. Exceeding 38 V risks permanent damage per TI's Absolute Maximum Ratings table.
Does LM2901DRG3 support rail-to-rail input operation?
Yes, the LM2901DRG3 supports rail-to-rail common-mode input voltage from ground (V–) up to VCC – 2 V. Either input can go to VCC without damage, and one input may exceed VCC while the other remains in valid range - enabling direct connection to unbuffered sensors and simplified front-end design.
Is LM2901DRG3 pin-compatible with legacy LM2901 variants?
Yes, LM2901DRG3 is a drop-in replacement for LM2901, LM339, and LM239 in SOIC-14 packages. It retains identical pinout, open-collector outputs, and supply pin locations - allowing seamless upgrade to improved offset, speed, and ESD performance without PCB or schematic changes.
What is the typical input bias current of LM2901DRG3?
The LM2901DRG3 exhibits a typical input bias current of 3.5 nA at 25°C, with a maximum of 25 nA over –40°C to +125°C. This ultra-low bias enables accurate interfacing with high-impedance sources such as thermistors, photodiodes, and capacitive sensors without signal degradation.
Can LM2901DRG3 drive a 5 V logic input directly?
No - LM2901DRG3 features open-collector outputs and cannot source current. To interface with 5 V logic, an external pull-up resistor (e.g., 10 kΩ to 5 V) is required on each output. The output sinks up to 21 mA, ensuring clean TTL/CMOS-compatible LOW levels (<400 mV) under load.
LM2901DRG3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- Open-Collector
- Voltage - Supply, Single/Dual (±):
- 2V ~ 30V, ±1V ~ 15V
- :
- 7mV @ 30V
- Voltage - Input Offset (Max):
- 0.25µA @ 5V
- Current - Input Bias (Max):
- 20mA
- Current - Output (Typ):
- 2.5mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 14-SOIC
LM2901DRG3 FAQ
1.How can I place an order for LM2901DRG3 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2901DRG3 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 LM2901DRG3 reliable?
The price and inventory of LM2901DRG3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2901DRG3 is usually 5 days.
3.What payment methods are accepted for LM2901DRG3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2901DRG3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2901DRG3?
LM2901DRG3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2901DRG3 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 LM2901DRG3?
For technical support, including LM2901DRG3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2901DRG3 requirements.
6.How does Aetrix verify that LM2901DRG3 is sourced from the original manufacturer or authorized distributors?
All LM2901DRG3 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 LM2901DRG3 meets industry standards.
7.What is the process for return or replacement of LM2901DRG3?
All LM2901DRG3 units undergo pre-shipment inspection (PSI). If there is an issue with LM2901DRG3, 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 LM2901DRG3 part is unused and in its original packaging.
Return procedure for LM2901DRG3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2901DRG3 Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
