My Inquiry
My Account
Texas Instruments LM211DRG4
- Part No.:
- LM211DRG4
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM211DRG4.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,961
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM211DRG4 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 drives loads up to 50 V at 50 mA - used in zero-crossing detectors, peak detectors, and oscillator circuits.
For engineers reviewing the LM211DRG4 datasheet, LM211DRG4 pinout, LM211DRG4 application, or LM211DRG4 equivalent, this page provides verified electrical parameters, thermal metrics, strobe/balance functionality, wire-OR capability, and real-world design context for comparator selection in noise-immune analog-digital interface applications.
Technical Context
The LM211DRG4 employs a PNP input stage enabling input common-mode range down to VCC− − 0.7 V, and features dual output terminals (COL OUT and EMIT OUT) for flexible load referencing - ground, VCC+, or VCC−. Its strobe input (BAL/STRB) enables external current-driven gating (–3 mA to –5 mA), while BALANCE allows offset trimming via external resistor network.
It operates across –40°C to +85°C, with maximum input bias current of 300 nA and input offset voltage of 7.5 mV (max). The open-collector NPN output stage isolates emitter from VCC−, permitting precise control of low-level output voltage (VOL) independent of supply rail.
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 and fast edge detection. |
| Supply Voltage Range | 3.5 V to 30 V total (VCC+ − VCC−) - supports single 5-V logic rails and dual ±15-V op-amp supplies without level-shifting. |
| Input Offset Voltage | 7.5 mV max (25°C) - defines minimum detectable differential voltage before output switching; impacts accuracy in precision thresholding. |
| Input Bias Current | 300 nA max (full temp range) - ensures minimal loading on high-impedance sources like photodiodes or RC timing networks. |
| Output Drive Capability | 50 V / 50 mA (collector output) - directly switches relays, lamps, or MOSFET gates without external driver stages. |
| Common-Mode Input Range | –14.7 V to +13.8 V (±15 V supply) - accommodates signals near supply rails, critical for rail-to-rail sensing in power monitoring. |
| Strobe Input Current | –3 mA to –5 mA (sinking) - requires active current source for reliable disable; direct grounding causes undefined behavior. |
Pinout & Package
LM211DRG4 is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package measuring 4.90 mm × 3.91 mm, with standard JEDEC MS-012AC footprint and gull-wing leads. Thermal resistance RθJA = 114.3°C/W enables operation up to 85°C ambient with moderate PCB copper area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: EMIT OUT | Emitter output terminal | Provides emitter-follower output referenced to VCC−; used for low-impedance sourcing or complementary drive with COL OUT. |
| 2: IN+ | Noninverting input | Accepts reference or signal input; high-impedance PNP input enables accurate comparison without loading source. |
| 3: IN− | Inverting input | Accepts monitored signal; differential comparison against IN+ determines output state (low/high-Z). |
| 4: VCC− | Negative supply rail | Reference for internal circuitry and EMIT OUT; supports dual-supply operation or ground-referenced single-supply use. |
| 5: BALANCE | Offset null adjustment | Connects external potentiometer (typically 10 kΩ) between VCC+ and VCC− to trim input offset voltage to ≤1 mV. |
| 6: BAL/STRB | Strobe control input | Sinking current (–3 to –5 mA) disables output regardless of input; must be actively driven - not tied to ground. |
| 7: COL OUT | Collector output terminal | Open-collector NPN output; requires external pullup to define logic-high level and sink up to 50 mA to VCC−. |
| 8: VCC+ | Positive supply rail | Power for internal circuitry and pullup reference; supports 5 V to +18 V (with VCC− ≥ –18 V). |
Key Features
| Feature | Design Value |
|---|---|
| Strobe-enabled output disable | Active-low current-sink control (BAL/STRB) allows synchronized blanking in multiplexed or time-gated measurement systems. |
| Wire-OR compatible output | Open-collector COL OUT enables multiple comparators to share one pullup and bus - simplifies priority encoder or alarm OR-ing. |
| Isolated input/output grounding | Both inputs and outputs float relative to system ground - supports level-shifting, isolated sensing, and mixed-supply interfacing. |
| Wide supply voltage flexibility | Operates from 3.5 V to 30 V total supply - eliminates need for dedicated comparator rails in 5-V or ±15-V systems. |
| High-voltage output switching | COL OUT switches up to 50 V at 50 mA - directly drives solenoids, optocouplers, or logic families requiring >5 V swing. |
Applications
| Zero-Crossing Detection | Oscillator Circuits |
|---|---|
|
Use Scenario: Detecting AC line voltage polarity transitions in motor control or power supply synchronization. IC Role / Device Role / Timing Role: High-speed comparator comparing sine wave against 0 V reference with <165 ns latency. Use Value: Enables precise phase-aligned switching, reducing EMI and improving efficiency in TRIAC/SCR firing circuits. |
Use Scenario: Building free-running multivibrators or crystal oscillators for clock generation in legacy systems. IC Role / Device Role / Timing Role: Core timing element in relaxation oscillator topology using RC feedback and hysteresis. Use Value: Delivers stable 100-kHz square wave output without external logic gates - reduces BOM count and layout complexity. |
| Peak Detection | TTL/MOS Interface Level Shifting |
|
Use Scenario: Capturing maximum amplitude of analog sensor outputs (e.g., vibration, audio envelope) for microcontroller ADC sampling. IC Role / Device Role / Timing Role: Comparator driving diode-capacitor hold circuit; strobe (BAL/STRB) freezes capture on command. Use Value: Achieves sub-µs capture window with <10 mV offset error - preserves signal fidelity in data acquisition front-ends. |
Use Scenario: Converting 3.3 V or 5 V logic signals to 12 V or 24 V control levels for industrial I/O modules. IC Role / Device Role / Timing Role: Voltage translator with open-collector output pulled to higher rail; supports bidirectional logic compatibility. Use Value: Eliminates level-shifter ICs - single LM211DRG4 interfaces MCU GPIO to PLC backplane or relay drivers. |
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 voltage (10 mV max), narrower temperature range (0°C to +70°C), same pinout and function. | Not qualified for extended industrial environments; unsuitable for designs requiring operation below 0°C or above 70°C. | Select LM311DR only for cost-sensitive commercial-grade applications where full –40°C to +85°C operation is unnecessary. |
| TLV1701IDBVR | Rail-to-rail input, 1.8–36 V supply, 1.2 µs response, CMOS push-pull output - no open-collector or strobe capability. | Lacks wire-OR support and external strobe; requires external pullup for open-drain emulation; lower drive strength (20 mA). | Choose TLV1701IDBVR when ultra-low supply voltage, rail-to-rail sensing, or low quiescent current (<10 µA) outweighs strobe and high-voltage drive needs. |
Compared with LM311DR and TLV1701IDBVR, the LM211DRG4 uniquely combines –40°C to +85°C operation, 165 ns speed, 50 V/50 mA output drive, and integrated strobe - making it the only choice for ruggedized, high-speed, high-voltage comparator applications requiring deterministic disable control.
Availability
LM211DRG4 is available at Aetrix Electronics and suitable for industrial automation, building management systems, and power supply monitoring requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM211DRG4 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 industrial-grade components.
The LM211DRG4 belongs to TI's legacy high-speed comparator family, engineered for reliability in harsh environments - targeting applications demanding wide supply range, high-voltage output, and robust strobe-controlled operation.
FAQ
What is the operating temperature range of the LM211DRG4?
The LM211DRG4 is specified for operation from –40°C to +85°C, making it suitable for industrial and automotive under-hood applications where ambient temperatures exceed commercial-grade limits. This range is confirmed in TI's SLCS007K datasheet Section 6.3 and distinguishes it from the LM311 (0°C to +70°C) and LM111 (–55°C to +125°C). The LM211DRG4 maintains all key specifications - including response time and input bias current - across this full range.
Can the LM211DRG4 operate from a single 5-V supply?
Yes, the LM211DRG4 can operate from a single 5-V supply (VCC+ = 5 V, VCC− = 0 V), as explicitly stated in the Features section of the datasheet. In this configuration, the input common-mode range extends from 0.5 V to 3.5 V, and the low-level output voltage (VOL) is guaranteed ≤0.4 V at 8 mA sink current. This enables direct interfacing with 5-V TTL or CMOS logic without level-shifting components.
What is the purpose of the BAL/STRB pin on the LM211DRG4?
The BAL/STRB pin on the LM211DRG4 serves a dual function: as a strobe input to disable the output (forcing high-impedance state regardless of input differential), and as a balance connection point for offset trimming when used with the BALANCE pin. For strobe operation, it must be actively sunk with –3 mA to –5 mA - tying it directly to ground violates the datasheet requirement and may cause unpredictable behavior.
Does the LM211DRG4 support wire-OR connection of multiple outputs?
Yes, the LM211DRG4 supports wire-OR connection via its open-collector COL OUT pin. Multiple LM211DRG4 devices can share a single pullup resistor to VCC+, allowing logical OR of their outputs - commonly used in alarm consolidation, priority encoding, or fault-bus architectures. The datasheet confirms this capability in Section 3 (Description) and Figure 16 (Multivibrator), where outputs are explicitly wired together.
What is the maximum output current the LM211DRG4 can sink through COL OUT?
The LM211DRG4 can sink up to 50 mA through its COL OUT pin while maintaining VOL ≤1.5 V (at ±15 V supply) or ≤0.4 V (at 5 V single supply), per datasheet Section 6.6. This rating applies with VCC− connected and adequate heatsinking; continuous operation near 50 mA requires attention to power dissipation (P = VOL × IOL) and thermal derating above 25°C ambient.
LM211DRG4 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 ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
LM211DRG4 FAQ
1.How can I place an order for LM211DRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM211DRG4 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 LM211DRG4 reliable?
The price and inventory of LM211DRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM211DRG4 is usually 5 days.
3.What payment methods are accepted for LM211DRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM211DRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM211DRG4?
LM211DRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM211DRG4 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 LM211DRG4?
For technical support, including LM211DRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM211DRG4 requirements.
6.How does Aetrix verify that LM211DRG4 is sourced from the original manufacturer or authorized distributors?
All LM211DRG4 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 LM211DRG4 meets industry standards.
7.What is the process for return or replacement of LM211DRG4?
All LM211DRG4 units undergo pre-shipment inspection (PSI). If there is an issue with LM211DRG4, 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 LM211DRG4 part is unused and in its original packaging.
Return procedure for LM211DRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM211DRG4 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…
