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Texas Instruments LM2901BIDR
- Part No.:
- LM2901BIDR
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM2901BIDR.pdf
- Description:
- 36-V, QUAD DIFFERENTIAL STANDARD
- Quantity:
- Payment:
- Shipping:
Inventory:1,017
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Product details
Overview
LM2901BIDR from Texas Instruments is a quad differential comparator IC designed for precision voltage comparison in industrial and automotive systems. It operates from 2V to 36V supply, delivers ±0.37mV typical input offset voltage, 1µs propagation delay, 200µA per comparator quiescent current, and supports −40°C to +125°C operation - enabling robust overvoltage detection in server PSUs and motor drives.
For engineers reviewing the LM2901BIDR datasheet, LM2901BIDR pinout, LM2901BIDR application, or LM2901BIDR equivalent, key selection criteria include its extended temperature range, 38V absolute maximum supply rating, rail-to-rail input capability (down to ground), open-collector TTL/MOS/CMOS-compatible outputs, and drop-in replacement compatibility with legacy LM2901 variants.
Technical Context
The LM2901BIDR implements four independent high-gain comparators with internal ESD clamps delivering 2kV HBM protection. Its input stage accepts common-mode voltages from ground to VCC − 2V, and differential inputs up to ±38V, enabling direct sensing of high-side signals without level-shifting.
Each comparator features an open-collector output capable of sinking 21mA at 1.5V saturation, compatible with pull-up networks ranging from 3.3V to 36V. Quiescent current remains stable across supply voltage (0.8–1.6mA total) and temperature, supporting low-power always-on monitoring functions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 36V - supports wide-input industrial rails and battery-backed systems without external regulation |
| Input Offset Voltage (max) | ±5.5mV over −40°C to +125°C - enables accurate threshold detection in temperature-varying environments |
| Propagation Delay | 1µs typical (TTL input step) - suitable for real-time fault response in UPS and motor control loops |
| Input Bias Current (typ) | 3.5nA - minimizes loading on high-impedance sensor sources like thermistors or photodiodes |
| Output Sink Current | 21mA at VOL = 1.5V - directly drives LEDs, relays, or logic inputs without external buffers |
| ESD Rating (HBM) | 2000V - meets industrial handling requirements without additional board-level protection |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive and industrial control cabinet deployment |
Pinout & Package
LM2901BIDR is packaged in a 14-pin SOIC (D) package measuring 8.70mm × 3.90mm, with standard JEDEC outline and surface-mount compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT1) | Comparator 1 output | Open-collector output; requires external pull-up to define logic HIGH level |
| 2 (OUT2) | Comparator 2 output | Independent open-collector output; may be wire-OR'd with other comparators |
| 3 (VCC) | Positive supply | Accepts 2V–36V; powers all four comparators; decoupling capacitor recommended |
| 4 (IN2–) | Comparator 2 inverting input | Differential input pair; supports common-mode down to ground and up to VCC − 2V |
| 5 (IN2+) | Comparator 2 non-inverting input | Paired with Pin 4; full ±38V differential input range enables high-side sensing |
| 6 (IN1–) | Comparator 1 inverting input | Electrically identical to Pin 4; channel naming follows TI's standard convention |
| 7 (IN1+) | Comparator 1 non-inverting input | Paired with Pin 6; no internal phase inversion - matches functional block diagram |
| 8 (IN3–) | Comparator 3 inverting input | Third independent comparator input; shares same electrical specs as Pins 4/6 |
| 9 (IN3+) | Comparator 3 non-inverting input | Paired with Pin 8; fully specified across full temperature and supply range |
| 10 (IN4–) | Comparator 4 inverting input | Fourth comparator input; validated for operation at 125°C ambient |
| 11 (IN4+) | Comparator 4 non-inverting input | Paired with Pin 10; supports same input voltage ranges and bias current specs |
| 12 (GND) | Negative supply / reference | System ground return; must be low-impedance path for stable comparator operation |
| 13 (OUT4) | Comparator 4 output | Open-collector; electrically identical to Pins 1 and 2; supports 25mA absolute max sink |
| 14 (OUT3) | Comparator 3 output | Final open-collector output; layout symmetry recommended for signal integrity |
Key Features
| Feature | Design Value |
|---|---|
| Drop-in B-version upgrade | Direct replacement for LM2901, LM339, and LM239 with no PCB changes required |
| Rail-to-rail input capability | Common-mode range includes ground and extends to VCC − 2V - eliminates need for level shifters |
| Low 0.37mV offset (typ) | Enables precise window-comparator designs for battery voltage monitoring and thermal thresholds |
| 200µA/comparator supply current | Reduces total system power by >50% vs. legacy A/V versions - critical for always-on subsystems |
| 1µs response time | Supports fast overcurrent detection in motor drives and short-circuit protection in server PSUs |
| 38V absolute max supply rating | Allows direct connection to 24V/32V industrial buses without input clamping or regulators |
Applications
| Overvoltage Protection Circuit | Motor Phase Monitoring |
|---|---|
Use Scenario: Detecting DC bus voltage excursions beyond 30V in a 24V industrial motor drive. IC Role / Device Role / Timing Role: Quad comparator configured as window detector and overvoltage latch using external resistive dividers and feedback. Use Value: Prevents IGBT damage by triggering shutdown within 1µs of overvoltage event; operates reliably at 125°C junction temperature. |
Use Scenario: Monitoring back-EMF zero-crossing in BLDC motor commutation for sensorless control. IC Role / Device Role / Timing Role: Four comparators condition and compare phase voltages against virtual neutral point to determine rotor position. Use Value: Enables accurate 6-step commutation without Hall sensors; low input bias current avoids distortion of high-impedance voltage dividers. |
| Server PSU Power-Good Signaling | Industrial Temperature Threshold Alarm |
Use Scenario: Validating stable 12V, 5V, 3.3V, and standby rails before releasing CPU reset in datacenter power supplies. IC Role / Device Role / Timing Role: Each comparator monitors one rail via resistor divider; outputs wire-OR'd to single PG# signal. Use Value: Single LM2901BIDR replaces four discrete comparators; 0.37mV offset ensures tight tolerance on ±1% rail margins. |
Use Scenario: Triggering alarm when cabinet temperature exceeds 85°C in factory automation PLC enclosures. IC Role / Device Role / Timing Role: One comparator compares NTC thermistor voltage against precision reference; remaining three monitor auxiliary sensors. Use Value: −40°C to +125°C rating ensures functionality inside sealed enclosures; 3.5nA input bias prevents thermistor self-heating error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2901DR | Legacy A-version; ±15mV max offset, 1.3µs response, −40°C to +125°C, 200µA/comparator | Lacks ESD hardening (2kV vs. unspecified), higher offset reduces accuracy in precision thresholds | Select LM2901BIDR when improved offset, speed, and ESD robustness are required for new designs |
| LM339BDR | Same B-version spec, but −40°C to +85°C temp range; otherwise identical electrical performance | Not qualified for automotive under-hood or industrial high-temp cabinet use | Choose LM2901BIDR for extended temperature applications; LM339BDR suits commercial-grade systems |
Compared with LM2901DR and LM339BDR, the LM2901BIDR uniquely combines automotive-grade temperature range (−40°C to +125°C), industry-leading 0.37mV offset, and 2kV ESD protection - making it the optimal choice for mission-critical industrial monitoring where long-term stability and ruggedness are mandatory.
Availability
LM2901BIDR is available at Aetrix Electronics and suitable for server PSU power-good signaling, motor phase monitoring, industrial overvoltage protection, and temperature threshold alarm systems requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM2901BIDR 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 power management ICs.
The LM2901BIDR belongs to TI's B-version quad comparator product line, engineered to replace legacy LM2901/LM339 families with enhanced offset, speed, ESD robustness, and temperature range for industrial and automotive real-time monitoring.
FAQ
What is the maximum supply voltage rating for the LM2901BIDR?
The LM2901BIDR has an absolute maximum supply voltage rating of 38V, exceeding the 36V operating limit. This allows safe operation in transient-overvoltage conditions common in 24V industrial buses and automotive 12V/24V systems. The recommended operating range remains 2V to 36V per TI's datasheet Section 6.4.
Does the LM2901BIDR support rail-to-rail input operation?
Yes, the LM2901BIDR supports rail-to-rail input common-mode range from ground (V−) up to VCC − 2V. This enables direct interface with sensors referenced to ground or high-side signals without external level-shifting circuitry - a key advantage over older comparator families.
Is the LM2901BIDR pin-compatible with the original LM2901?
Yes, the LM2901BIDR is a drop-in replacement for the LM2901 in SOIC-14 (D) packaging. Pin functions, numbering, and electrical behavior are identical; only performance parameters (offset, speed, ESD) are improved. No PCB or schematic changes are needed for migration.
What output configuration does the LM2901BIDR use?
The LM2901BIDR uses open-collector outputs on all four comparators. Each output requires an external pull-up resistor to define the logic HIGH level - supporting mixed-voltage interfacing (e.g., 3.3V logic driving a 24V load) and wired-OR functionality across multiple comparators.
What is the guaranteed input offset voltage specification for LM2901BIDR over temperature?
The LM2901BIDR guarantees ±5.5mV maximum input offset voltage across its full operating temperature range of −40°C to +125°C. At 25°C, typical offset is ±0.37mV, and the distribution remains tightly controlled - critical for precision window-comparator and threshold-detection applications.
LM2901BIDR 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:
- Differential
- Number of Elements:
- 4
- Output Type:
- Open-Collector
- Voltage - Supply, Single/Dual (±):
- 2V ~ 36V
- :
- 3.5mV @ 5V
- Voltage - Input Offset (Max):
- 0.025µA @ 5V
- Current - Input Bias (Max):
- 21mA
- Current - Output (Typ):
- 1.2mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 1µs (Typ)
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 14-SOIC
LM2901BIDR FAQ
1.How can I place an order for LM2901BIDR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2901BIDR 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 LM2901BIDR reliable?
The price and inventory of LM2901BIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2901BIDR is usually 5 days.
3.What payment methods are accepted for LM2901BIDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2901BIDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2901BIDR?
LM2901BIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2901BIDR 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 LM2901BIDR?
For technical support, including LM2901BIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2901BIDR requirements.
6.How does Aetrix verify that LM2901BIDR is sourced from the original manufacturer or authorized distributors?
All LM2901BIDR 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 LM2901BIDR meets industry standards.
7.What is the process for return or replacement of LM2901BIDR?
All LM2901BIDR units undergo pre-shipment inspection (PSI). If there is an issue with LM2901BIDR, 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 LM2901BIDR part is unused and in its original packaging.
Return procedure for LM2901BIDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM2901BIDR Tags
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