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Texas Instruments LM211QDRG4
- Part No.:
- LM211QDRG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM211QDRG4.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,958
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Product details
Overview
LM211QDRG4 from Texas Instruments is a high-speed voltage comparator IC with open-collector output, designed for precision level detection in industrial and automotive systems. It delivers 165 ns response time, supports ±15 V or single 5-V supply operation, and features strobe control and offset balancing. It drives loads up to 50 V at 50 mA and operates across –40°C to +125°C.
For engineers reviewing the LM211QDRG4 datasheet, LM211QDRG4 pinout, LM211QDRG4 application, or LM211QDRG4 equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, automotive-grade thermal and electrical behavior, and two confirmed alternative comparators with documented functional trade-offs.
Technical Context
The LM211QDRG4 uses a PNP input stage enabling input common-mode operation down to VCC−, followed by high-gain amplification and an isolated-emitter NPN open-collector output stage. Its strobe (BAL/STRB) pin enables external current-driven disabling (–3 mA to –5 mA), while BALANCE allows external offset trimming via resistor network.
It operates over a 3.5–30 V total supply range (VCC+ − VCC−), supports rail-to-rail input common-mode range (–14.7 V to +13.8 V at ±15 V supplies), and maintains <7.5 mV max input offset voltage and <300 nA max input bias current across its full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Response Time | 165 ns high-to-low; enables fast edge detection in motor control timing and PWM feedback loops. |
| Input Offset Voltage | Max 7.5 mV at 25°C; defines minimum detectable voltage difference before output switching. |
| Input Bias Current | Max 300 nA over full temperature range; ensures minimal loading on high-impedance sensor inputs. |
| Supply Range | 3.5 V to 30 V total (VCC+ − VCC−); supports dual ±15 V op-amp rails or single 5 V logic-compatible operation. |
| Output Drive | 50 V / 50 mA collector sink capability; directly interfaces with relays, lamps, optocouplers, and TTL/MOS logic. |
| Operating Temp | –40°C to +125°C; qualified for under-hood automotive applications and industrial environments. |
| ESD Rating | ±500 V HBM; meets standard handling requirements for production assembly without special ESD controls. |
Pinout & Package
LM211QDRG4 is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package measuring 4.90 mm × 3.91 mm, with gull-wing leads and surface-mount compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EMIT OUT | Emitter output terminal | Provides emitter-follower output referenced to VCC−; used for level-shifting or low-impedance buffering. |
| 2 - IN+ | Noninverting input | Accepts reference or signal voltage; input stage operates down to VCC−, supporting ground-referenced sensing. |
| 3 - IN− | Inverting input | Accepts comparison signal; differential input voltage polarity determines output state. |
| 4 - VCC− | Negative supply rail | Reference node for internal circuitry and EMIT OUT; required even in single-supply configurations (e.g., tied to GND). |
| 5 - BALANCE | Offset null adjustment | Connects external potentiometer to trim input offset voltage; open-circuit when unused. |
| 6 - BAL/STRB | Strobe control input | Current-sink input (–3 mA typical); pulls output high-impedance when active, enabling synchronized sampling. |
| 7 - COL OUT | Collector output | Open-collector NPN output; requires external pullup; sinks up to 50 mA at ≤50 V relative to VCC−. |
| 8 - VCC+ | Positive supply rail | Primary power input; supports 3.5–30 V total supply swing relative to VCC−. |
Key Features
| Feature | Design Value |
|---|---|
| Strobe-enabled output disable | Active-low current-driven control (–3 mA) isolates output without external logic, critical for time-multiplexed sensing. |
| Isolated emitter output | EMIT OUT pin referenced independently to VCC− enables floating-load driving and bidirectional level translation. |
| Wide supply compatibility | Operates from ±15 V op-amp rails or single 5 V logic supply-eliminates need for level translators in mixed-voltage systems. |
| High-voltage open-collector sink | COL OUT rated for 50 V/50 mA enables direct relay, solenoid, and optocoupler interface without driver transistors. |
| Automotive Q-Temp qualification | Specified and tested over –40°C to +125°C per AEC-Q100 guidelines; includes configuration control and print support. |
Applications
| Motor Control Feedback | Automotive Body Control Module |
|---|---|
|
Use Scenario: Detecting zero-crossing of back-EMF in BLDC motor commutation. IC Role / Device Role / Timing Role: High-speed comparator generating precise commutation timing edges with sub-200 ns latency. Use Value: Enables accurate rotor position sensing without dedicated Hall sensors, reducing BOM cost and board space. |
Use Scenario: Monitoring door lock actuator current to detect jam or obstruction. IC Role / Device Role / Timing Role: Current-sense comparator triggering fault shutdown within 200 ns of overcurrent event. Use Value: Meets ASIL-B functional safety timing constraints for occupant protection systems. |
| Industrial Power Supply OVP | White Goods Motor Speed Detection |
|
Use Scenario: Overvoltage protection in 24 V DC industrial PSUs using resistive divider feedback. IC Role / Device Role / Timing Role: Precision threshold detector with <7.5 mV offset, rejecting supply ripple via strobe synchronization. Use Value: Prevents false trips during transient load steps while maintaining fast 165 ns response to actual overvoltage faults. |
Use Scenario: Counting tachometer pulses from induction motor in washing machine drum drive. IC Role / Device Role / Timing Role: Schmitt-triggered comparator converting noisy analog tach signal into clean digital pulses. Use Value: Reliable speed measurement across wide temperature range (–40°C to +125°C) without calibration drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM311DR | Wider input offset (max 10 mV), narrower temp range (0°C to +70°C), same pinout and function. | Not qualified for automotive or extended industrial use; suitable only for commercial-grade consumer electronics. | Select LM311DR only if cost sensitivity outweighs temperature and reliability requirements. |
| TLV3011IDBVR | Lower supply current (35 µA vs 6 mA), rail-to-rail input, but lower output drive (10 mA) and no strobe/BALANCE pins. | Lacks strobe and offset trim; unsuitable for synchronized sampling or precision trimming; limited to low-power battery systems. | Choose TLV3011IDBVR only for ultra-low-power portable designs where 165 ns speed and 50 V drive are unnecessary. |
Compared with LM211QDRG4, LM311DR sacrifices automotive temperature range and precision for lower cost, while TLV3011IDBVR trades off drive strength, strobe control, and offset adjustability for microamp-level quiescent current-making LM211QDRG4 uniquely suited for ruggedized, high-speed, high-voltage industrial and automotive sensing.
Availability
LM211QDRG4 is available at Aetrix Electronics and suitable for motor control feedback, automotive body control modules, industrial power supply OVP, and white goods motor speed detection requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM211QDRG4 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, embedded processing, and connectivity technologies, with decades of expertise in high-reliability analog signal conditioning.
The LM211QDRG4 belongs to TI's legacy high-speed comparator family, engineered for robust performance in automotive and industrial environments where precision, speed, and temperature resilience are critical.
FAQ
What is the maximum supply voltage rating for LM211QDRG4?
The LM211QDRG4 has an absolute maximum supply voltage rating of ±18 V (VCC+ ≤ +18 V, VCC− ≥ –18 V), with a maximum total supply swing of 36 V. Recommended operating range is 3.5 V to 30 V (VCC+ − VCC−). Exceeding these limits risks permanent damage, per TI's SLCS007K datasheet Section 6.1.
Does LM211QDRG4 support single-supply operation?
Yes, LM211QDRG4 supports true single-supply operation: VCC− can be connected to ground while VCC+ operates from +5 V to +30 V. Its PNP input stage allows input common-mode voltage down to VCC−, enabling ground-referenced signal comparison without level shifting.
How does the BAL/STRB pin function on LM211QDRG4?
The BAL/STRB pin on LM211QDRG4 serves dual purpose: as a strobe input (sinking –3 mA to –5 mA) to force high-impedance output state, or as a balance control when used with external resistors for offset trimming. It must never be shorted to ground-TI specifies current-driven activation per Figure 18 and Section 6.6.
What is the output configuration of LM211QDRG4?
LM211QDRG4 features two independent outputs: COL OUT is an open-collector NPN transistor capable of sinking up to 50 mA at up to 50 V relative to VCC−; EMIT OUT is an emitter-follower output referenced to VCC−, providing low-impedance buffered voltage following.
Is LM211QDRG4 qualified for automotive applications?
Yes, LM211QDRG4 is explicitly designated as a Q-Temp automotive device, qualified per AEC-Q100 standards for operation from –40°C to +125°C. It includes configuration control, print support, and high-reliability testing-confirmed in TI's SLCS007K datasheet Features section and Section 8.1 Overview.
LM211QDRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
LM211QDRG4 FAQ
1.How can I place an order for LM211QDRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM211QDRG4 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 LM211QDRG4 reliable?
The price and inventory of LM211QDRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM211QDRG4 is usually 5 days.
3.What payment methods are accepted for LM211QDRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM211QDRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM211QDRG4?
LM211QDRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM211QDRG4 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 LM211QDRG4?
For technical support, including LM211QDRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM211QDRG4 requirements.
6.How does Aetrix verify that LM211QDRG4 is sourced from the original manufacturer or authorized distributors?
All LM211QDRG4 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 LM211QDRG4 meets industry standards.
7.What is the process for return or replacement of LM211QDRG4?
All LM211QDRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM211QDRG4, 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 LM211QDRG4 part is unused and in its original packaging.
Return procedure for LM211QDRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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