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Texas Instruments LM2901BWRTERQ1
- Part No.:
- LM2901BWRTERQ1
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
LM2901BWRTERQ1.pdf
- Description:
- AUTOMOTIVE, 36-V, QUAD DIFFERENT
- Quantity:
- Payment:
- Shipping:
Inventory:3,150
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Product details
Overview
LM2901BWRTERQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified quad open-drain comparator with 2 V to 36 V supply range, ±0.37 mV typical input offset voltage, 3.5 nA typical input bias current, and 1 µs typical propagation delay at 5 V. It operates across –40°C to +125°C ambient and supports HEV/EV powertrain voltage monitoring.
For engineers reviewing the LM2901BWRTERQ1 datasheet, LM2901BWRTERQ1 pinout, LM2901BWRTERQ1 application, or LM2901BWRTERQ1 equivalent, key selection criteria include its 36 V max supply rating, 2 kV HBM ESD robustness, open-collector output compatibility with TTL/MOS/CMOS, and guaranteed operation over automotive temperature extremes.
Technical Context
The LM2901BWRTERQ1 implements four independent PNP Darlington-pair input comparators, enabling high gain (>200 V/mV) and low input bias current while maintaining rail-to-rail common-mode input range down to ground. Its open-drain NPN output stage allows flexible logic-level translation via external pull-up resistors.
It supports single-supply operation from 2 V to 36 V or dual supplies with up to 36 V differential, and features dedicated ESD protection on all pins (2 kV HBM), improved negative input voltage handling, and functional safety documentation support for ISO 26262 system design.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 36 V - enables direct interface with 12 V/24 V/36 V automotive battery rails without regulation |
| Input Offset Voltage (typ) | ±0.37 mV - ensures accurate threshold detection in precision sensing applications like battery cell monitoring |
| Input Bias Current (typ) | 3.5 nA - minimizes loading error on high-impedance sensor sources such as thermistors or potentiometers |
| Propagation Delay (typ) | 1 µs at 5 V - supports real-time response in fast-cycling control loops like motor phase detection |
| ESD Rating (HBM) | ±2000 V - meets AEC-Q100 Class 2 requirements for robustness in harsh automotive environments |
| Operating Temperature | –40°C to +125°C - qualified for under-hood and powertrain locations per AEC-Q100 Grade 1 |
| Output Type | Open-drain NPN - allows wired-AND logic, level shifting, and compatibility with 1.8 V to 36 V logic families |
Pinout & Package
LM2901BWRTERQ1 is packaged in a 14-pin TSSOP (PW) with body size 4.40 mm × 5.00 mm and exposed thermal pad connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT2) | Comparator 1 output | Open-drain NPN sink - requires external pull-up for logic-high assertion; supports wired-AND |
| 2 (OUT1) | Comparator 2 output | Independent open-drain output - enables parallel threshold comparison without cross-talk |
| 3 (VCC) | Positive supply | Accepts 2 V to 36 V - powers all four comparators; no separate reference required |
| 4 (IN2–) | Comparator 1 inverting input | PNP Darlington input - supports common-mode down to ground; tolerates inputs up to VCC |
| 5 (IN2+) | Comparator 1 non-inverting input | Differential pair input - determines output state based on relative voltage vs. IN2– |
| 6 (IN1–) | Comparator 2 inverting input | Identical electrical behavior to IN2– - enables dual-channel signal monitoring |
| 7 (IN1+) | Comparator 2 non-inverting input | Matches IN2+ function - used for redundant or complementary threshold detection |
| 8 (IN3–) | Comparator 3 inverting input | Third independent input pair - supports multi-zone fault detection (e.g., HVAC blower stages) |
| 9 (IN3+) | Comparator 3 non-inverting input | Enables third threshold comparison - scalable for multi-level battery pack monitoring |
| 10 (IN4–) | Comparator 4 inverting input | Fourth channel input - allows full quad use in complex window-comparator or sequencing circuits |
| 11 (IN4+) | Comparator 4 non-inverting input | Completes quad functionality - supports simultaneous monitoring of four independent analog signals |
| 12 (GND) | Negative supply / reference | Return path for all comparators; thermal pad must be connected directly to GND for thermal stability |
| 13 (OUT4) | Comparator 4 output | Final open-drain output - enables full utilization of all four channels without external buffering |
| 14 (OUT3) | Comparator 3 output | Third independent output - supports discrete fault signaling or cascaded logic functions |
Key Features
| Feature | Design Value |
|---|---|
| Quad independent comparators | Four fully isolated channels in one package - reduces PCB area and BOM count versus discrete solutions |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C operation - eliminates need for derating in engine bay or power electronics modules |
| 2 kV HBM ESD protection | Enhanced pin-level ESD robustness over legacy LM2901x-Q1 - improves manufacturing yield and field reliability |
| Common-mode input range includes ground | Supports direct sensing of 0 V referenced signals (e.g., current-sense shunts, thermocouples) without level-shifting circuitry |
| Differential input voltage range ±36 V | Withstands full supply rail transients - enables safe operation during load-dump or jump-start events in 24 V systems |
| Low quiescent current (0.8 mA typ) | Reduces standby power in always-on modules like body control units - extends battery life in key-off scenarios |
Applications
| Engine Coolant Level Detection | EV Battery Cell Voltage Monitoring |
|---|---|
Use Scenario: Detect coolant level via float switch or capacitive sensor output against fixed reference voltage. IC Role / Device Role / Timing Role: Quad comparator compares multiple threshold levels (low/normal/high) simultaneously using internal reference ladder. Use Value: Enables single-chip implementation of three-level status reporting with fail-safe redundancy - no microcontroller polling required. | Use Scenario: Monitor individual Li-ion cell voltages in series-connected EV battery packs to detect overvoltage or undervoltage conditions. IC Role / Device Role / Timing Role: Each comparator channel monitors one cell's voltage against precise reference; open-drain outputs feed OR-wired fault bus. Use Value: Achieves <1 µs response to cell overvoltage - critical for triggering immediate contactor disconnect before thermal runaway. |
| Automotive HVAC Blower Speed Control | Powertrain Throttle Position Validation |
Use Scenario: Convert analog throttle position sensor (TPS) output into discrete speed steps (off/low/med/high) for brushed DC blower motor control. IC Role / Device Role / Timing Role: Four comparators generate step-encoded logic outputs mapped to PWM duty cycle lookup table in MCU. Use Value: Eliminates ADC sampling and software interpolation - reduces MCU processing load and latency in climate control loop. | Use Scenario: Validate dual-redundant TPS signals by comparing primary and secondary outputs to detect mismatch or drift beyond ±50 mV tolerance. IC Role / Device Role / Timing Role: Two comparators perform cross-check; remaining two monitor upper/lower limits for plausibility. Use Value: Provides hardware-level fault detection independent of MCU firmware - satisfies ASIL-B diagnostic coverage requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2901QPWRQ1 | Same pinout, SOIC-14 package; 15 mV max offset voltage (vs. 5.5 mV for LM2901BWRTERQ1); 25 nA typical input bias current | Lower accuracy and slower response (1.3 µs); suitable for non-critical threshold detection where cost is prioritized | Select when board space allows larger SOIC and performance margin permits higher offset and bias current |
| TLV3704QDRQ1 | RRIO input, 36 V supply, but rail-to-rail output; 1.5 mV max offset; 100 pA bias current; 360 µA total IQ | Higher precision and lower power, but not drop-in - requires layout change due to different pin mapping and no open-drain outputs | Choose for ultra-low-power or precision analog front-ends where open-drain logic is not required |
Compared with LM2901QPWRQ1 and TLV3704QDRQ1, LM2901BWRTERQ1 delivers superior offset voltage and ESD robustness in the compact TSSOP package while retaining legacy-compatible pinout and open-drain flexibility essential for automotive wired-AND fault buses.
Availability
LM2901BWRTERQ1 is available at Aetrix Electronics and suitable for automotive powertrain control, infotainment system voltage supervision, and body electronics requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM2901BWRTERQ1 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 and embedded processing solutions for automotive, industrial, and personal electronics markets.
The LM2901x-Q1 product line delivers AEC-Q100-qualified comparators optimized for automotive subsystems requiring wide supply range, high reliability, and functional safety support - especially in HEV/EV, chassis, and body control applications.
FAQ
What is the maximum supply voltage rating for LM2901BWRTERQ1?
The LM2901BWRTERQ1 supports a maximum supply voltage of 36 V, verified per absolute maximum ratings in the official datasheet (SLCS142H). This allows direct connection to 24 V commercial vehicle systems and withstands transient spikes up to 38 V without damage, making it suitable for unregulated automotive battery rails.
Does LM2901BWRTERQ1 support operation down to ground on its inputs?
Yes, LM2901BWRTERQ1 has a common-mode input voltage range that includes ground (V–), confirmed in Section 5.7 of the datasheet. Both inputs can operate from (V–) to (V+) – 2.0 V across –40°C to +125°C, enabling direct interface with ground-referenced sensors like shunt-based current monitors.
Is LM2901BWRTERQ1 pin-compatible with standard LM2901-Q1 variants?
Yes, LM2901BWRTERQ1 shares identical pin configuration and function with other LM2901x-Q1 devices in TSSOP-14 (PW) packaging, including LM2901QPWRQ1. Pin mapping matches Figure 4-1 and Table 4-1 in SLCS142H, supporting drop-in replacement where enhanced offset voltage and ESD performance are required.
What output logic configuration does LM2901BWRTERQ1 use?
LM2901BWRTERQ1 uses open-drain NPN outputs on all four channels, as specified in Section 6.3 and Figure 6-2 of the datasheet. Each output sinks current when the inverting input exceeds the non-inverting input plus offset voltage, requiring external pull-up resistors to define logic-high voltage level and enable wired-AND functionality.
How does the ESD performance of LM2901BWRTERQ1 compare to earlier versions?
LM2901BWRTERQ1 provides improved 2 kV HBM ESD protection on all pins, exceeding the Class 1C/Class 2 ratings of prior LM2901x-Q1 versions. This enhancement is explicitly called out in Section 1 Features and Table 5.3 of SLCS142H, addressing assembly-line ESD risks and improving field reliability in service environments.
LM2901BWRTERQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 16-WFQFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 4
- Output Type:
- Open-Drain
- Voltage - Supply, Single/Dual (±):
- 2V ~ 36V
- :
- 3.5mV @ 36V
- Voltage - Input Offset (Max):
- 0.025µA @ 5V
- Current - Input Bias (Max):
- 21mA @ 5V
- Current - Output (Typ):
- 1.2mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 1µs (Typ)
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- Automotive
- Grade:
- AEC-Q100
- Qualification:
- Surface Mount, Wettable Flank
- :
- 16-WQFN (3x3)
LM2901BWRTERQ1 FAQ
1.How can I place an order for LM2901BWRTERQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2901BWRTERQ1 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 LM2901BWRTERQ1 reliable?
The price and inventory of LM2901BWRTERQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2901BWRTERQ1 is usually 5 days.
3.What payment methods are accepted for LM2901BWRTERQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2901BWRTERQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2901BWRTERQ1?
LM2901BWRTERQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2901BWRTERQ1 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 LM2901BWRTERQ1?
For technical support, including LM2901BWRTERQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2901BWRTERQ1 requirements.
6.How does Aetrix verify that LM2901BWRTERQ1 is sourced from the original manufacturer or authorized distributors?
All LM2901BWRTERQ1 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 LM2901BWRTERQ1 meets industry standards.
7.What is the process for return or replacement of LM2901BWRTERQ1?
All LM2901BWRTERQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM2901BWRTERQ1, 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 LM2901BWRTERQ1 part is unused and in its original packaging.
Return procedure for LM2901BWRTERQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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