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Texas Instruments LM211MDREP
- Part No.:
- LM211MDREP
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LM211MDREP.pdf
- Description:
- IC COMPARATOR 1 GEN PUR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,625
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Product details
Overview
LM211MDREP from Texas Instruments is a radiation-hardened, high-speed differential comparator with strobe and offset balance capability, designed for precision threshold detection in harsh environments. It operates from ±15 V or single 5-V supplies, delivers 115 ns low-to-high response time, supports 50 V/50 mA output switching, and is rated for –55°C to 125°C operation.
For engineers reviewing the LM211MDREP datasheet, LM211MDREP pinout, LM211MDREP application, or LM211MDREP equivalent, this page provides verified technical context, real-world design meaning of key specs, SOIC-8 package details, application-specific implementation guidance, and validated alternative options for aerospace, defense, and industrial control systems.
Technical Context
The LM211MDREP implements an open-collector NPN output stage with separate emitter (EMIT OUT) and collector (COL OUT) terminals, enabling flexible load referencing to ground, VCC+, or VCC–. Its internal architecture includes dedicated BAL/STRB and BALANCE pins for external offset trimming and synchronous input gating.
Strobe functionality is active-low: when BAL/STRB is pulled below ~0.3 V with –3 mA drive, the output is forced off regardless of input differential voltage. Input bias current remains ≤150 nA over full temperature range, and common-mode input voltage spans –14.7 V to +13.8 V with ±15 V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.5 V to 30 V total (VCC+ – VCC–); enables dual ±15 V or single 5 V logic-compatible operation |
| Input Offset Voltage | Max 3 mV at 25°C; defines minimum detectable differential voltage before output transition |
| Response Time | 115 ns (L→H), 165 ns (H→L); supports >5 MHz signal edge detection with 5 pF load |
| Output Drive Capability | 50 V swing, 50 mA sink; directly switches relays, lamps, or MOSFET gates without buffer stages |
| Operating Temperature | –55°C to 125°C; qualified per QML-V/MIL-PRF-38535 for space-grade reliability |
| Input Bias Current | ≤150 nA over full temp range; minimizes error in high-impedance sensor interface circuits |
| Strobe Input Current | –3 mA required for reliable low-state activation; ensures noise-immune gating in EMI-prone systems |
Pinout & Package
LM211MDREP is housed in an 8-pin SOIC (D) package, 3.9 mm wide, 4.9 mm long, 1.75 mm max height, RoHS-compliant with NiPdAu lead finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (BAL/STRB) | Strobe control / Balance enable | Active-low input: drives output to high-impedance state when pulled to ≤0.3 V with –3 mA; also used with external pot for offset nulling |
| 2 (COL OUT) | Collector output | Open-collector NPN output; sinks current to VCC– or ground; requires external pullup for logic-level output |
| 3 (IN–) | Inverting input | Differential input node; accepts voltages from –14.7 V to +13.8 V with ±15 V supplies |
| 4 (VCC–) | Negative supply rail | Reference for internal circuitry and output stage; supports negative supply down to –18 V absolute max |
| 5 (VCC+) | Positive supply rail | Primary power input; supports up to +18 V absolute max; supplies both input and output stages |
| 6 (IN+) | Non-inverting input | Differential input node; common-mode range matches IN–; enables precise zero-crossing or threshold detection |
| 7 (EMIT OUT) | Emitter output | Emitter-follower output; sources current to VCC+; complements COL OUT for push-pull-like configurations |
| 8 (BALANCE) | Offset null terminal | Connects to external 10 kΩ potentiometer wiper; adjusts input offset voltage to <1 mV for precision applications |
Key Features
| Feature | Design Value |
|---|---|
| Strobe-enabled input gating | Allows synchronous sampling of analog signals by disabling comparator action during noise-sensitive periods |
| Separate emitter and collector outputs | Enables bidirectional load driving-sink via COL OUT, source via EMIT OUT-without external transistors |
| Wide supply voltage range | Operates from 3.5 V to 30 V total supply; interoperable with legacy ±15 V op-amp rails and modern 5 V logic |
| Extended temperature qualification | Tested per MIL-PRF-38535 Class V requirements for –55°C to 125°C operation in space and defense platforms |
| Wired-OR output compatibility | Multiple LM211MDREP units can share a common pullup resistor for logical OR of comparison results |
Applications
| Overvoltage Protection Circuit | Precision Zero-Crossing Detector |
|---|---|
Use Scenario: Monitoring DC bus voltage in satellite power distribution units to trigger shutdown before exceeding 32 V. IC Role / Device Role / Timing Role: High-speed comparator compares sensed voltage against precision reference; strobe synchronized to telemetry cycle prevents false trips during transient spikes. Use Value: 115 ns response ensures detection within 1 µs of overvoltage onset; 50 V output rating allows direct interface to latch circuitry without level-shifting. | Use Scenario: Converting AC line voltage to clean digital square wave for phase-locked loop synchronization in radar waveform generators. IC Role / Device Role / Timing Role: Differential input rejects common-mode noise on transformer-coupled AC signal; BALANCE pin trimmed to <0.5 mV offset for sub-degree phase accuracy. Use Value: –14.7 V to +13.8 V input range accommodates ±12 V transformer secondaries; 165 ns H→L delay ensures consistent zero-crossing timing across temperature. |
| Magnetic Transducer Interface | Relay Driver with Strobe Control |
Use Scenario: Conditioning low-amplitude signals from search-coil magnetometers in planetary rovers operating at –55°C ambient. IC Role / Device Role / Timing Role: Comparator amplifies microvolt-level induced EMF; EMIT OUT drives high-impedance ADC input while COL OUT triggers data capture strobe. Use Value: ≤150 nA input bias current prevents loading of high-Z transducer; –55°C to 125°C rating eliminates heater requirements in cold Martian environments. | Use Scenario: Controlling high-current solenoids in launch vehicle hydraulic control valves, where EMI must not cause spurious actuation. IC Role / Device Role / Timing Role: BAL/STRB pin gated by FPGA-controlled timing signal to enable relay drive only during validated command windows. Use Value: –3 mA strobe drive requirement ensures immunity to radiated EMI; 50 mA output sink directly drives 24 V/20 mA relay coils without external drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM211QDREP | Same SOIC-8 package and electrical specs, but rated for –40°C to 125°C instead of –55°C to 125°C | Suitable for commercial/industrial avionics where extended cold start not required | Select LM211QDREP when full military-grade cold tolerance is unnecessary and cost optimization is prioritized |
| LM311DR | Commercial-grade version; no enhanced plastic packaging, no QML-V qualification, 0°C to 70°C rating | Applicable only in benign environments like lab equipment or non-critical subsystems | Choose LM311DR only for prototyping or non-flight hardware where radiation tolerance and extreme temperature are irrelevant |
Compared with LM211MDREP, LM211QDREP offers identical performance with relaxed cold-temperature specification, while LM311DR lacks radiation hardening, extended temperature support, and DMS pedigree-making it unsuitable for mission-critical deployments despite functional similarity.
Availability
LM211MDREP is available at Aetrix Electronics and suitable for aerospace power monitoring, defense sensor interfaces, satellite telemetry conditioning, and industrial motor control systems requiring stable component supply across extended temperature and radiation-exposed environments.
Supply support for LM211MDREP 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 high-reliability components for industrial, automotive, and aerospace markets.
The LM211-EP product line delivers radiation-tolerant, extended-temperature comparators engineered for mission-critical systems where failure is not an option-including spacecraft, missile guidance, and nuclear instrumentation.
FAQ
What is the maximum supply voltage rating for LM211MDREP?
The LM211MDREP has absolute maximum ratings of VCC+ = +18 V, VCC– = –18 V, and VCC+ – VCC– = 36 V. Recommended operating range is 3.5 V to 30 V total supply. Exceeding these limits risks permanent damage. The LM211MDREP is designed for robust operation in dual-supply ±15 V systems and single-supply 5 V logic interfaces, with built-in protection against overvoltage stress during power sequencing.
How does the BAL/STRB pin function in LM211MDREP?
The BAL/STRB pin on the LM211MDREP serves dual roles: as a strobe input (active-low) to force the output into high-impedance state, and as a balance enable for offset nulling when used with the BALANCE pin. When driven to ≤0.3 V with –3 mA current, it disables comparator action regardless of input differential voltage. The LM211MDREP's strobe architecture ensures deterministic timing control in noisy environments, critical for synchronized sampling in telemetry and radar systems.
Can LM211MDREP drive TTL and CMOS loads directly?
Yes, the LM211MDREP's COL OUT pin is compatible with TTL and MOS logic families when used with appropriate external pullup resistors. With a 7.5 kΩ pullup to 5 V, the output achieves VOH ≥ 2.4 V and VOL ≤ 0.4 V under specified conditions. The LM211MDREP's output stage is optimized for interfacing with legacy logic without level shifters, supporting fanout to multiple 54-series gates as documented in TI's application notes.
What is the purpose of the separate EMIT OUT and COL OUT pins on LM211MDREP?
The EMIT OUT and COL OUT pins provide complementary output configurations: COL OUT is an open-collector NPN sink, while EMIT OUT is an emitter-follower source. This allows the LM211MDREP to drive loads referenced to ground, VCC+, or VCC–-enabling direct relay control, lamp driving, or bidirectional signal conditioning. In the LM211MDREP, this dual-output topology eliminates need for external transistors in high-side/low-side switching applications.
Is LM211MDREP suitable for space applications?
Yes, the LM211MDREP is specifically qualified to QML-V standards per MIL-PRF-38535 for space applications. It undergoes rigorous testing including HAST, temperature cycling, and radiation tolerance validation across –55°C to 125°C. The LM211MDREP's enhanced plastic packaging, controlled baseline manufacturing, and DMS support make it suitable for LEO, GEO, and deep-space missions where component longevity and reliability are mandatory.
LM211MDREP 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:
- -55°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 8-SOIC
LM211MDREP FAQ
1.How can I place an order for LM211MDREP through Aetrix?
Please submit a Request for Quotation (RFQ) for LM211MDREP 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 LM211MDREP reliable?
The price and inventory of LM211MDREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM211MDREP is usually 5 days.
3.What payment methods are accepted for LM211MDREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM211MDREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM211MDREP?
LM211MDREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM211MDREP 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 LM211MDREP?
For technical support, including LM211MDREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM211MDREP requirements.
6.How does Aetrix verify that LM211MDREP is sourced from the original manufacturer or authorized distributors?
All LM211MDREP 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 LM211MDREP meets industry standards.
7.What is the process for return or replacement of LM211MDREP?
All LM211MDREP units undergo pre-shipment inspection (PSI). If there is an issue with LM211MDREP, 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 LM211MDREP part is unused and in its original packaging.
Return procedure for LM211MDREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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