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Texas Instruments LM211QDRG4Q1
- Part No.:
- LM211QDRG4Q1
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM211QDRG4Q1.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,211
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Product details
Overview
LM211QDRG4Q1 from Texas Instruments is a single high-speed voltage comparator qualified for automotive applications, featuring 115 ns low-to-high response time, ±30 V differential input voltage rating, and strobe-enabled output disable capability. It operates from ±15 V or single 5-V supplies, drives TTL/MOS loads, and switches up to 50 V at 50 mA - used in zero-crossing detection, relay control, and precision threshold sensing.
For engineers reviewing the LM211QDRG4Q1 datasheet, LM211QDRG4Q1 pinout, LM211QDRG4Q1 application, or LM211QDRG4Q1 equivalent, key selection considerations include strobe logic compatibility, dual-supply isolation capability, collector/emitter open-collector output configuration, and automotive-grade temperature range (−40°C to 125°C).
Technical Context
The LM211QDRG4Q1 implements a bipolar transistor-based comparator architecture with separate emitter and collector outputs, enabling flexible load referencing to ground, VCC+, or VCC−. Its internal balance/strobe terminal allows synchronous output blanking independent of input differential voltage.
It supports true rail-to-rail common-mode input range (−14.7 V to +13.8 V at full temperature range) and maintains sub-3 mV input offset voltage maximum at 25°C. The device uses current-driven strobe logic requiring −3 mA to −5 mA sink for reliable disable operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Response Time (L→H) | 115 ns - enables fast edge detection in motor commutation or PWM timing circuits |
| Input Offset Voltage | Max 3 mV at 25°C - ensures accurate threshold comparison in precision analog monitoring |
| Differential Input Voltage | ±30 V - permits direct interface with high-voltage sensors without external attenuation |
| Output Drive Capability | 50 V / 50 mA - supports direct solenoid, relay, or lamp driving without external buffers |
| Supply Voltage Range | 3.5 V to 30 V (VCC+ − VCC−) - compatible with industrial ±15 V, automotive 5 V, and mixed-supply systems |
| Operating Temperature | −40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood automotive use |
| Input Bias Current | Max 150 nA - minimizes loading error on high-impedance sensor sources like photodiodes |
Pinout & Package
LM211QDRG4Q1 is housed in an 8-pin SOIC (D) package, 3.90 mm × 4.90 mm body, 1.75 mm max height, RoHS-compliant NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BAL/STRB) | Strobe/Balance Control | Sink −3 mA to disable output; open or tied to VCC+ for balance adjustment |
| 2 (EMIT OUT) | Emitter Output | Open-emitter output referenced to VCC−; requires external pull-up for active-high logic |
| 3 (IN−) | Inverting Input | Differential input node; accepts common-mode voltages up to ±15 V |
| 4 (VCC−) | Negative Supply Rail | Reference for emitter output and negative supply; supports dual- or single-supply operation |
| 5 (IN+) | Non-inverting Input | Differential input node; matched bias current path with IN− |
| 6 (VCC+) | Positive Supply Rail | Power supply input; supports up to +18 V absolute max |
| 7 (COL OUT) | Collector Output | Open-collector output referenced to VCC+; sinks current when active |
| 8 (BALANCE) | Offset Null Terminal | Connects to external potentiometer for manual input offset trimming |
Key Features
| Feature | Design Value |
|---|---|
| Strobe-Enabled Output Disable | Active-low strobe forces both outputs into high-impedance state regardless of input, enabling synchronized system gating |
| Isolated Input/Output Structure | All inputs and outputs electrically isolated from system ground - supports floating sensor interfaces and level-shifting applications |
| Dual-Output Configuration | Separate emitter and collector outputs allow simultaneous sourcing and sinking paths for bidirectional load control |
| Wire-OR Capable Outputs | Open-collector and open-emitter outputs support wired-logic bus architectures without external diodes |
| Automotive Qualified | AEC-Q100 Grade 1 qualified with production test coverage across −40°C to +125°C operating range |
Applications
| Zero-Crossing Detection | Relay/Solenoid Control |
|---|---|
Use Scenario: Monitoring AC line voltage to trigger switching at voltage zero crossings for EMI reduction in power converters. IC Role / Device Role / Timing Role: High-speed comparator detecting polarity reversal with <115 ns propagation delay and ±30 V input tolerance. Use Value: Eliminates turn-on switching losses and reduces conducted noise by synchronizing MOSFET gate drive to zero-voltage transitions. | Use Scenario: Driving 24 V DC relays or 12 V solenoids in automotive body control modules. IC Role / Device Role / Timing Role: Interface between low-power microcontroller GPIO and inductive load, providing 50 V/50 mA switching with strobe-based safety disable. Use Value: Enables fail-safe deactivation during fault conditions via hardware strobe signal, independent of MCU firmware state. |
| Magnetic Transducer Interface | TTL-Level Threshold Comparator |
Use Scenario: Converting analog output from Hall-effect or variable-reluctance sensors into clean digital pulses for crankshaft position sensing. IC Role / Device Role / Timing Role: High-input-impedance comparator with 150 nA max bias current preserving signal integrity from high-Z transducers. Use Value: Maintains accurate timing resolution at engine speeds >10,000 RPM due to sub-200 ns total propagation delay. | Use Scenario: Converting analog sensor outputs (e.g., temperature, pressure) into TTL-compatible logic levels for microcontroller ADC pre-triggering. IC Role / Device Role / Timing Role: Precision threshold detector with 3 mV max offset and rail-to-rail input range, directly interfacing with 5 V logic systems. Use Value: Reduces BOM count by eliminating external op-amp buffer stages while maintaining 12-bit-equivalent decision accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM211DR | Commercial-grade (−25°C to +85°C), same SOIC-8 pinout and electrical specs except wider offset (7 mV max) and no AEC-Q100 qualification | Not suitable for automotive under-hood or industrial extended-temperature deployments | Select LM211DR only for cost-sensitive non-automotive applications where temperature range and qualification are not required |
| TLV1701QDRQ1 | Rail-to-rail input, 1.8 V to 36 V supply, CMOS output (push-pull), lower quiescent current (85 µA), but no strobe or dual-output capability | Lacks strobe disable and open-collector/open-emitter flexibility; unsuitable for wire-OR or isolated load referencing | Choose TLV1701QDRQ1 when low power and rail-to-rail input are critical, but avoid where strobe control or dual-output topology is needed |
Compared with LM211DR and TLV1701QDRQ1, the LM211QDRG4Q1 uniquely combines automotive qualification, strobe-enabled output disable, and dual open-collector/emitter outputs - making it irreplaceable in safety-critical, isolated, or synchronized switching applications where timing control and robustness are mandatory.
Availability
LM211QDRG4Q1 is available at Aetrix Electronics and suitable for automotive body control units, industrial relay logic systems, and precision sensor interface modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM211QDRG4Q1 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 for industrial, automotive, and consumer markets.
The LM211-Q1 product line delivers high-speed, automotive-qualified comparators designed specifically for robust operation in harsh environments - emphasizing reliability, wide supply range, and functional safety features like strobe disable.
FAQ
What is the maximum differential input voltage specification for LM211QDRG4Q1?
The LM211QDRG4Q1 supports a maximum differential input voltage of ±30 V, as specified in the Absolute Maximum Ratings table. This allows direct connection to high-voltage sensor signals without external attenuation. Exceeding this rating risks permanent damage. The parameter applies across the full −40°C to +125°C operating range and is independent of supply voltage configuration.
Does LM211QDRG4Q1 support single-supply operation?
Yes, LM211QDRG4Q1 can operate from a single 5-V supply, as explicitly stated in the datasheet description. In this mode, VCC− is connected to ground and VCC+ to 5 V. Input common-mode range extends from VCC− + 0.5 V to VCC+ − 1.5 V, supporting valid input signals from 0.5 V to 3.5 V. Output remains compatible with TTL logic thresholds.
How does the strobe function work on LM211QDRG4Q1?
The BAL/STRB pin on LM211QDRG4Q1 serves as a current-sink strobe input: pulling −3 mA to −5 mA disables both COL OUT and EMIT OUT, forcing them into high-impedance states regardless of input differential voltage. The pin must never be shorted to ground - instead, it should be driven by an active current source or transistor switch. This provides hardware-level output blanking for safety-critical timing windows.
What is the purpose of the BALANCE pin on LM211QDRG4Q1?
The BALANCE pin on LM211QDRG4Q1 provides access to the internal input offset nulling network. Connecting an external 10 kΩ potentiometer between VCC+ and VCC−, with its wiper to BALANCE, allows manual trimming of input offset voltage to ≤1 mV. This is essential in precision applications such as reference voltage monitoring or low-level sensor amplification where offset-induced errors must be minimized.
Can LM211QDRG4Q1 outputs be wire-OR connected?
Yes, both the COL OUT (open-collector) and EMIT OUT (open-emitter) pins on LM211QDRG4Q1 support wire-OR configurations. Multiple comparators can share a common pull-up resistor on COL OUT or a common pull-down on EMIT OUT to implement logical OR functions without external diodes. This simplifies bus arbitration and alarm aggregation in multi-sensor systems while maintaining signal integrity.
LM211QDRG4Q1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- DTL, MOS, Open-Collector, Open-Emitter, RTL, TTL
- Voltage - Supply, Single/Dual (±):
- 3.5V ~ 30V, ±1.75V ~ 15V
- :
- 3mV @ ±15V
- Voltage - Input Offset (Max):
- 0.1µA @ ±15V
- Current - Input Bias (Max):
- 50mA
- Current - Output (Typ):
- 6mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- Automotive
- Grade:
- AEC-Q100
- Qualification:
- Surface Mount
- :
- 8-SOIC
LM211QDRG4Q1 FAQ
1.How can I place an order for LM211QDRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM211QDRG4Q1 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 LM211QDRG4Q1 reliable?
The price and inventory of LM211QDRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM211QDRG4Q1 is usually 5 days.
3.What payment methods are accepted for LM211QDRG4Q1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM211QDRG4Q1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM211QDRG4Q1?
LM211QDRG4Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM211QDRG4Q1 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 LM211QDRG4Q1?
For technical support, including LM211QDRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM211QDRG4Q1 requirements.
6.How does Aetrix verify that LM211QDRG4Q1 is sourced from the original manufacturer or authorized distributors?
All LM211QDRG4Q1 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 LM211QDRG4Q1 meets industry standards.
7.What is the process for return or replacement of LM211QDRG4Q1?
All LM211QDRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with LM211QDRG4Q1, 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 LM211QDRG4Q1 part is unused and in its original packaging.
Return procedure for LM211QDRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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