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Texas Instruments LP2901DRG4
- Part No.:
- LP2901DRG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LP2901DRG4.pdf
- Description:
- IC COMPARATOR 4 GEN PUR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,199
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Product details
Overview
LP2901DRG4 from Texas Instruments is a low-power quadruple voltage comparator IC designed for single-supply operation across 3 V to 30 V, featuring ±2 mV input offset voltage (typ), 60 µA supply current (typ), and −40°C to 85°C operating range. It delivers 30 mA sink current at VO = 2 V and supports CMOS/TTL logic interfacing in battery-powered sensing and control circuits.
For engineers reviewing the LP2901DRG4 datasheet, LP2901DRG4 pinout, LP2901DRG4 application, or LP2901DRG4 equivalent, this page provides verified technical context, real-world design meaning of key specs, SOIC-14 package details, functional alternatives, and supply-chain support for industrial and embedded systems deployment.
Technical Context
The LP2901DRG4 integrates four independent comparators with p-n-p input stages enabling ground-sensing capability and common-mode input range extending to GND. Its bimodal output stage-comprising Darlington and ground-emitter modes-delivers 30 mA sink current above VO = 1.5 V and ~700 µA below VO = 0.4 V, supporting direct LED/relay drive without external transistors.
Input bias current is −2.5 nA (typ) and input offset current is ±0.5 nA (typ), ensuring minimal loading on high-impedance sources. Absolute maximum ratings include ±36 V differential input voltage and 36 V supply voltage, with reverse-voltage protection on VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 30 V - enables direct use with 5 V, 12 V, or 24 V industrial rails without regulation |
| Supply Current | 60 µA typ - allows multi-year battery life in portable threshold-detection applications |
| Input Offset Voltage | ±2 mV typ - supports accurate 10-bit-equivalent analog thresholding at 5 V reference |
| Output Sink Current | 30 mA at VO = 2 V - drives LEDs, small relays, or logic inputs directly without buffer stages |
| Operating Temperature | −40°C to 85°C - qualified for automotive under-hood and industrial control environments |
| Input Bias Current | −2.5 nA typ - preserves signal integrity when monitoring high-Z sensors like thermistors or photodiodes |
| Common-Mode Range | 0 V to VCC − 2 V - permits detection of signals referenced to ground in single-supply systems |
Pinout & Package
LP2901DRG4 is housed in a 14-pin SOIC (D) package, 3.9 mm wide, 1.75 mm max height, RoHS-compliant with NIPDAU lead finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 5, 6 | Comparator Inputs (IN−/IN+) | Differential input pairs for four independent comparators; IN− pins accept reference, IN+ pins sense signal |
| 3, 4, 10, 11 | Comparator Outputs | Open-collector outputs requiring external pull-up; support wired-AND logic and mixed-voltage interfacing |
| 7 | GND | Ground reference for all comparators and internal bias network |
| 14 | VCC | Single positive supply input; reverse-voltage protected up to −0.3 V |
| 8, 9, 12, 13 | Unused Comparator Inputs | Must be grounded per datasheet to prevent floating inputs and excess current draw |
Key Features
| Feature | Design Value |
|---|---|
| Ground-sensing input stage | Common-mode range includes 0 V - enables direct monitoring of signals referenced to system ground |
| Bimodal open-collector output | 30 mA sink @ VO ≥ 1.5 V + 700 µA sink @ VO ≤ 0.4 V - eliminates need for external driver transistors in most loads |
| Ultra-low power consumption | 60 µA typical supply current - reduces thermal load and extends battery runtime in always-on detection circuits |
| CMOS/TTL logic compatibility | Output voltage swing compatible with 3.3 V/5 V logic families - simplifies interface to microcontrollers and FPGAs |
| Wide supply voltage tolerance | Operates from 3 V to 30 V - supports direct connection to unregulated battery or industrial bus rails |
Applications
| Overvoltage Protection Circuit | Temperature Threshold Monitor |
|---|---|
Use Scenario: Detects when DC bus voltage exceeds safe limit in power supplies or motor drives. IC Role / Device Role / Timing Role: Quadruple comparator compares bus voltage against precision reference; one channel triggers shutdown via MCU interrupt. Use Value: Enables fast, low-power overvoltage response without MCU polling - reduces system latency and power overhead. | Use Scenario: Monitors thermistor voltage divider output to detect critical temperature thresholds in HVAC or industrial controllers. IC Role / Device Role / Timing Role: Compares thermistor-derived voltage against multiple fixed references to identify warning, alarm, and shutdown zones. Use Value: Four independent channels allow simultaneous monitoring of multiple zones using a single IC - saves board space and BOM cost. |
| LED Status Indicator Driver | Zero-Crossing Detector |
Use Scenario: Drives status LEDs based on sensor state or system mode in portable medical devices. IC Role / Device Role / Timing Role: Comparator output sinks current directly into LED anode (with cathode tied to VCC), eliminating discrete transistor. Use Value: Reduces component count by 4× vs. discrete transistor solutions - improves reliability and simplifies layout. | Use Scenario: Detects AC line zero-crossing for phase-controlled dimming or synchronous switching in smart lighting. IC Role / Device Role / Timing Role: Compares rectified AC waveform against 0 V reference using ground-sensing input capability. Use Value: Eliminates need for level-shifting circuitry - enables direct AC sensing with single-supply operation and minimal external parts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quadruple comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2901DT | Same SOIC-14 package, identical pinout, ±2 mV VIO (max), but rated only to 70°C ambient | Limited to commercial-temperature applications; not suitable for extended industrial or automotive use | Select LM2901DT only if operating ambient stays ≤70°C and full −40°C qualification is unnecessary |
| TLV331IDR | Rail-to-rail input, 65 µA ICC, but single-channel; requires four units to match LP2901DRG4 integration | Higher board area and BOM count; better for ultra-low-voltage (1.8 V) designs where LP2901DRG4 cannot operate | Choose TLV331IDR when supply voltage drops below 3 V or rail-to-rail input common-mode is mandatory |
Compared with LM2901DT, LP2901DRG4 adds −40°C qualification and tighter offset drift over temperature; versus TLV331IDR, it offers integrated quad functionality and higher supply voltage tolerance at the cost of input rail-to-rail capability.
Availability
LP2901DRG4 is available at Aetrix Electronics and suitable for industrial control panels, battery-powered instrumentation, and automotive body electronics requiring stable component supply across extended temperature ranges.
Supply support for LP2901DRG4 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 emphasis on reliability, scalability, and long-term product support.
The LP2901DRG4 belongs to TI's legacy precision comparator family, engineered for robust single-supply operation in cost-sensitive industrial and automotive subsystems where low power, ground-sensing, and logic compatibility are essential.
FAQ
What is the operating temperature range for LP2901DRG4?
The LP2901DRG4 is specified for operation from −40°C to +85°C ambient temperature. This extended range qualifies it for use in automotive under-hood modules, industrial PLC I/O cards, and outdoor environmental monitoring equipment where thermal extremes are expected. The datasheet confirms full electrical performance across this range, including input offset voltage and supply current stability.
Does LP2901DRG4 support single-supply operation with ground-referenced inputs?
Yes, LP2901DRG4 supports true single-supply operation with common-mode input voltage range extending to ground (0 V). Its p-n-p input stage enables direct sensing of signals referenced to system ground - a key requirement for battery voltage monitoring, current-sense amplification, and sensor interfaces where negative supply rails are impractical.
What is the maximum sink current capability of LP2901DRG4 at different output voltages?
LP2901DRG4 exhibits bimodal output behavior: it sinks up to 30 mA when output voltage is ≥1.5 V (Darlington mode), and ~700 µA when output voltage drops to 0.4 V (ground-emitter mode). This dual-mode design allows direct driving of LEDs and relays while maintaining low quiescent current - no external transistor needed for most medium-current loads.
Is LP2901DRG4 pin-compatible with other TI quad comparators?
Yes, LP2901DRG4 is pin-for-pin compatible with LM239, LM339, and LM2901 in SOIC-14 packaging. All share identical pin assignments for inputs, outputs, VCC, and GND. However, LP2901DRG4 differs in temperature rating (−40°C to 85°C) and input offset voltage distribution (±2 mV typ), making it a drop-in upgrade for designs needing wider thermal margin.
Can unused comparator inputs on LP2901DRG4 be left floating?
No - all unused comparator inputs on LP2901DRG4 must be grounded per the datasheet. Floating inputs cause unpredictable bias currents, increased supply current, and potential oscillation due to the high-impedance p-n-p input stage. Grounding unused IN+ and IN− pins ensures stable quiescent operation and prevents false triggering in adjacent active comparators.
LP2901DRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- CMOS, MOS, Open-Collector
- Voltage - Supply, Single/Dual (±):
- 3V ~ 30V
- :
- 5mV @ 30V
- Voltage - Input Offset (Max):
- 0.025µA @ 5V
- Current - Input Bias (Max):
- 30mA @ 5V
- Current - Output (Typ):
- 100µA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 14-SOIC
LP2901DRG4 FAQ
1.How can I place an order for LP2901DRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP2901DRG4 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 LP2901DRG4 reliable?
The price and inventory of LP2901DRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP2901DRG4 is usually 5 days.
3.What payment methods are accepted for LP2901DRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP2901DRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP2901DRG4?
LP2901DRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP2901DRG4 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 LP2901DRG4?
For technical support, including LP2901DRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP2901DRG4 requirements.
6.How does Aetrix verify that LP2901DRG4 is sourced from the original manufacturer or authorized distributors?
All LP2901DRG4 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 LP2901DRG4 meets industry standards.
7.What is the process for return or replacement of LP2901DRG4?
All LP2901DRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LP2901DRG4, 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 LP2901DRG4 part is unused and in its original packaging.
Return procedure for LP2901DRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP2901DRG4 Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
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LM2901PWR
Texas Instruments
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LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP Semiconductors
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