My Inquiry
My Account
Texas Instruments LM211DG4
- Part No.:
- LM211DG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM211DG4.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,910
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM211DG4 from Texas Instruments is a single high-speed voltage comparator with open-collector output, designed for precision level detection in industrial and embedded 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 / 50 mA and operates across –40°C to +85°C.
For engineers reviewing the LM211DG4 datasheet, LM211DG4 pinout, LM211DG4 application, or LM211DG4 equivalent, this page provides verified electrical specs, thermal metrics, strobe timing behavior, collector/emitter output configuration, and real-world use cases including zero-crossing detection, peak detection, and TTL/MOS interfacing.
Technical Context
The LM211DG4 uses a PNP input stage enabling input common-mode range down to VCC– – 14.7 V, making it suitable for ground-referenced or negative-rail sensing. Its high-gain internal stage ensures fast decision-making, while the isolated-emitter NPN output stage allows flexible load referencing - to ground, VCC+, or VCC−.
Strobe (BAL/STRB) enables external gating of output state: when pulled low (–3 mA), output is forced high-impedance regardless of input differential. Offset adjustment via BALANCE pin permits trimming of input offset voltage up to ±7.5 mV at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Response time | 165 ns high-to-low (±15 V, 100-mV step, 5-mV overdrive); enables sub-6-MHz comparator-based oscillators |
| Input offset voltage | Max 7.5 mV at 25°C; defines minimum detectable voltage difference before output transition |
| Input bias current | Max 300 nA at full temperature range; supports high-impedance sensor interfaces without loading |
| Supply voltage range | 3.5 V to 30 V total (VCC+ – VCC–); compatible with ±15 V op-amp rails and single 5-V logic supplies |
| Output capability | Open-collector COL OUT sinks 50 mA at VOL ≤ 1.5 V (VCC+ = ±15 V); EMIT OUT provides emitter-follower sourcing |
| Operating temperature | –40°C to +85°C; qualified for industrial and automotive body-control applications |
| ESD rating | HBM ±500 V, CDM ±750 V; meets standard manufacturing ESD control requirements |
Pinout & Package
LM211DG4 is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package measuring 4.90 mm × 3.91 mm, with gull-wing leads and standard JEDEC MS-012AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: EMIT OUT | Emitter-follower output | Sources current; referenced to VCC–; used for level-shifting or driving grounded loads |
| 2: IN+ | Noninverting input | Accepts analog signal or reference; common-mode range extends to VCC– – 14.7 V |
| 3: IN− | Inverting input | Accepts threshold or feedback signal; differential comparison determines output state |
| 4: VCC− | Negative supply rail | Reference for internal circuitry and EMIT OUT; supports dual-supply or single-supply (ground) operation |
| 5: BALANCE | Offset null terminal | Connects to potentiometer wiper for manual VIO trimming; improves DC accuracy in precision thresholds |
| 6: BAL/STRB | Strobe control input | Sinking ≥3 mA forces high-Z output; enables synchronized sampling or gated comparison windows |
| 7: COL OUT | Open-collector output | Sinks current to VCC−; requires external pullup; supports wire-OR logic and mixed-voltage interfacing |
| 8: VCC+ | Positive supply rail | Power for internal amplifier stages; sets upper limit for output swing and input common-mode range |
Key Features
| Feature | Design Value |
|---|---|
| Strobe-enabled output disable | Guaranteed high-impedance state on COL OUT and EMIT OUT when BAL/STRB is actively sunk (–3 mA) |
| Wide supply flexibility | Operates from 3.5 V to 30 V total supply; supports legacy ±15 V, modern 5 V, and asymmetric rails |
| Isolated output referencing | COL OUT and EMIT OUT can drive loads tied to ground, VCC+, or VCC− - no shared return path required |
| Low input bias current | ≤300 nA max over full temperature range; preserves signal integrity in high-Z sensor or RC timing networks |
| Wire-OR compatible output | Open-collector COL OUT allows multiple comparators to share a single pullup and bus line without contention |
Applications
| Zero-Crossing Detection | Oscillator & Timing Circuits |
|---|---|
|
Use Scenario: Detecting AC waveform polarity transitions in motor control, power inverters, or audio signal processing. IC Role / Device Role / Timing Role: Voltage comparator comparing sinusoidal input against 0 V reference; triggers edge-sensitive logic on each crossing. Use Value: 165 ns propagation delay ensures accurate phase alignment; strobe capability allows synchronous sampling at specific grid cycles. |
Use Scenario: Building free-running multivibrators, crystal oscillators, or relaxation oscillators for clock generation or PWM timing. IC Role / Device Role / Timing Role: Core decision element in feedback loop with RC or crystal network; defines frequency via hysteresis or delay. Use Value: Open-collector output simplifies connection to capacitor charging paths; wide supply range supports 5 V to ±15 V oscillator topologies. |
| Peak Detector | TTL/MOS Level Translation |
|
Use Scenario: Capturing maximum amplitude of transient signals in instrumentation, battery monitoring, or envelope detection. IC Role / Device Role / Timing Role: Comparator latching peak voltage onto hold capacitor via diode; reset by external control or timed discharge. Use Value: Low input bias current (<300 nA) minimizes capacitor leakage error; strobe pin enables precise capture window control. |
Use Scenario: Interfacing microcontrollers (3.3 V/5 V) with higher-voltage peripherals (12 V relays, 24 V sensors, or industrial buses). IC Role / Device Role / Timing Role: Logic-level translator using COL OUT pullup to target voltage; isolates MCU I/O from high-side switching noise. Use Value: Output capable of sinking 50 mA at ≤1.5 V drop enables direct drive of LEDs, optocouplers, or small solenoids without buffer transistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM311DR | Same architecture but rated for 0°C to +70°C; lower max input offset (2 mV typ) and reduced output voltage capability (40 V vs 50 V) | Better suited for commercial-grade cost-sensitive designs where extended temperature range is unnecessary | Select LM311DR only if ambient operating temperature stays within 0–70°C and 40 V output swing suffices |
| TLV3011DBVR | CMOS input (0.5 pA bias), rail-to-rail input, 1.8–5.5 V supply only; 300 ns response time; no strobe or balance pins | Optimized for ultra-low-power, single-supply portable systems - lacks industrial voltage and temperature robustness | Choose TLV3011DBVR for battery-powered applications requiring nanoamp inputs and 3.3 V compatibility, not for 50 V loads or –40°C environments |
Compared with LM311DR and TLV3011DBVR, the LM211DG4 uniquely combines industrial temperature range (–40°C to +85°C), 50 V output drive, strobe control, and offset trimming - making it irreplaceable in ruggedized timing, relay control, and AC sensing where reliability under stress is non-negotiable.
Availability
LM211DG4 is available at Aetrix Electronics and suitable for industrial automation, building control systems, and power supply monitoring requiring stable component supply across extended temperature and voltage ranges.
Supply support for LM211DG4 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, longevity, and industrial-grade qualification.
The LM211DG4 belongs to TI's legacy high-speed comparator family, engineered for robust performance in noisy, high-voltage, and thermally demanding environments - especially where precision timing, load switching, and system-level isolation are critical.
FAQ
What is the maximum output voltage swing supported by the LM211DG4?
The LM211DG4 COL OUT pin can switch loads up to 50 V referenced to VCC–, as specified in Absolute Maximum Ratings. When used with VCC+ = 30 V and VCC– = 0 V, the collector output safely drives 30 V loads; with VCC+ = 15 V and VCC– = –15 V, it supports 50 V differential swing. This makes LM211DG4 suitable for driving relays, lamps, and industrial sensors directly without level-shifting circuitry.
Does the LM211DG4 support single-supply operation?
Yes, the LM211DG4 supports true single-supply operation from as low as 3.5 V total supply (VCC+ – VCC–). It functions correctly with VCC– tied to ground and VCC+ at 5 V, enabling direct interface with TTL and CMOS logic. Input common-mode range extends down to VCC– + 0.5 V, allowing ground-referenced signal comparison - a key advantage over many comparators requiring split supplies.
How does the BAL/STRB pin function in the LM211DG4?
The BAL/STRB pin on the LM211DG4 serves dual roles: as a strobe input and as a balance control. When actively sunk with –3 mA to –5 mA, it forces both COL OUT and EMIT OUT into high-impedance states - independent of input conditions. When left open or connected to VCC+, it enables normal comparator operation. This pin must never be shorted to ground; current-driving is mandatory for reliable strobe action.
Can the LM211DG4 drive a 50 mA load reliably?
Yes, the LM211DG4 COL OUT is rated to sink 50 mA with a guaranteed low-level output voltage (VOL) of ≤1.5 V at ±15 V supplies and 25°C. At full temperature range (–40°C to +85°C) and VCC+ = 4.5 V, VOL remains ≤0.4 V at 8 mA - confirming robust performance for driving LEDs, small relays, and optocouplers. Thermal derating should be applied for continuous 50 mA operation in high-ambient environments.
What is the purpose of the EMIT OUT pin on the LM211DG4?
The EMIT OUT pin on the LM211DG4 provides an emitter-follower output that sources current relative to VCC–. Unlike COL OUT, which sinks current, EMIT OUT actively pulls up toward VCC– + VBE (~0.7 V below VCC–). This enables level-shifting applications - for example, converting a 5 V logic signal to a –14.3 V referenced output - and supports driving grounded loads without external transistors. It cannot be wire-OR'd but offers complementary drive capability.
LM211DG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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 ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
LM211DG4 FAQ
1.How can I place an order for LM211DG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM211DG4 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 LM211DG4 reliable?
The price and inventory of LM211DG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM211DG4 is usually 5 days.
3.What payment methods are accepted for LM211DG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM211DG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM211DG4?
LM211DG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM211DG4 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 LM211DG4?
For technical support, including LM211DG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM211DG4 requirements.
6.How does Aetrix verify that LM211DG4 is sourced from the original manufacturer or authorized distributors?
All LM211DG4 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 LM211DG4 meets industry standards.
7.What is the process for return or replacement of LM211DG4?
All LM211DG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM211DG4, 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 LM211DG4 part is unused and in its original packaging.
Return procedure for LM211DG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM211DG4 Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
