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Texas Instruments LM111WGRLQMLV
- Part No.:
- LM111WGRLQMLV
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 10-CSOIC (0.241", 6.12mm Width)
- Datasheet:
-
LM111WGRLQMLV.pdf
- Description:
- VOLTAGE COMPARATOR 10-CFP -55 TO
- Quantity:
- Payment:
- Shipping:
Inventory:3,027
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Product details
Overview
LM111WGRLQMLV from Texas Instruments is a radiation-hardened voltage comparator designed for space and high-reliability military systems. It delivers 200 nA max input bias current, ±30 V differential input range, and 50 mA output sink capability across −55°C to +125°C. It operates from single 5 V or dual ±15 V supplies and drives TTL/DTL/RTL/MOS loads directly in satellite power monitoring and missile guidance signal conditioning.
For engineers reviewing the LM111WGRLQMLV datasheet, LM111WGRLQMLV pinout, LM111WGRLQMLV application, or LM111WGRLQMLV equivalent, this page provides verified radiation tolerance data (50 krad(Si) high-dose-rate, 100 krad(Si) ELDRS-free), strobe-enabled comparator timing, offset null capability, and package-specific thermal resistance values for flight-critical design validation.
Technical Context
The LM111WGRLQMLV implements an open-collector NPN output stage with independent strobe control on Pin 6, enabling synchronized comparison gating in phased-array radar receivers. Its input stage uses matched transistor pairs to achieve ≤±3 mV offset voltage and ≤±20 nA offset current over full temperature range.
It supports ground-, positive-supply-, or negative-supply-referenced load driving without level-shifting circuitry, and its balanced input architecture allows isolation from system ground-critical for floating bus monitoring in spacecraft power distribution units.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 200 nA max over −55°C to +125°C - enables high-impedance sensor interface without loading precision voltage dividers |
| Differential Input Voltage Range | ±30 V - supports direct comparison of signals referenced to different supply rails in avionics power sequencing |
| Output Sink Current | 50 mA - drives relays, lamps, or logic inputs without external buffer stages in launch vehicle sequencers |
| Supply Voltage Range | Single 5 V to ±15 V - interoperates with legacy 5 V digital logic and standard op-amp analog rails |
| Response Time | 300 ns (min) at 5 mV overdrive - meets timing requirements for fault detection in real-time power converter protection |
| Radiation Tolerance | 50 krad(Si) high-dose-rate & 100 krad(Si) ELDRS-free - qualified per MIL-STD-883 Method 1019 for LEO/MEO missions |
| Operating Temperature | −55°C to +125°C - validated for use in unheated satellite bays and jet engine-mounted control electronics |
Pinout & Package
LM111WGRLQMLV is supplied in an 8-pin TO-99 metal can package (Package Number LMC0008C), with Pin 4 internally connected to case for shielding and thermal conduction. The package is hermetically sealed and qualified for space-grade reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Balance (Offset Null) | Connects to external potentiometer for trimming input offset voltage to ≤±3 mV in precision threshold detection |
| Pin 2 | Inverting Input (IN−) | Accepts reference or feedback signal; supports common-mode range up to ±30 V relative to supply rails |
| Pin 3 | Non-Inverting Input (IN+) | Accepts sensed signal; enables high-side or low-side voltage monitoring without level shifters |
| Pin 4 | Case / Shield | Internally bonded to metal can; must be connected to system ground or chassis for EMI suppression and thermal dissipation |
| Pin 5 | Balance/Strobe (BAL/STB) | Active-low enable: pulls output high-Z when asserted; used for time-gated comparisons in pulse-width modulated systems |
| Pin 6 | Output (Collector) | Open-collector NPN output; requires external pull-up to VCC or alternate rail for wired-OR logic or multi-comparator voting |
| Pin 7 | V− (Negative Supply) | Accepts −5 V to −15 V; enables true bipolar operation for AC-coupled signal comparison in radar IF stages |
| Pin 8 | V+ (Positive Supply) | Accepts +5 V to +15 V; powers internal differential pair and output stage with <7 mA quiescent current |
Key Features
| Feature | Design Value |
|---|---|
| Strobe capability | Pin 5 enables synchronous comparison gating - critical for time-of-flight measurement in laser altimeters |
| Offset voltage null | Pins 1 and 5 support external trim to ≤±3 mV - ensures accurate trip-point setting in battery-cell overvoltage protection |
| Wide supply range | Operates from single 5 V up to ±15 V - eliminates need for dedicated analog rails in mixed-signal payloads |
| Output isolation | Output referenced to ground, V+, or V− - simplifies interface to isolated DC-DC converters in spacecraft power management |
| Radiation assurance | Qualified to 50 krad(Si) high-dose-rate and 100 krad(Si) ELDRS-free - meets NASA GSFC-8010 and DoD SMD 5962R0052402 requirements |
Applications
| Power Sequencing Monitor | Satellite Bus Voltage Supervisor |
|---|---|
Use Scenario: Monitoring sequential turn-on of 12 V, 5 V, and 3.3 V rails in launch vehicle avionics. IC Role / Device Role / Timing Role: Comparator compares each rail against precision reference; strobe pin synchronizes sampling to clock edge. Use Value: Ensures no rail powers before its prerequisite, preventing latch-up in FPGA-based mission computers. | Use Scenario: Detecting undervoltage/fault conditions on 28 V primary bus in LEO microsatellites. IC Role / Device Role / Timing Role: High-common-mode comparator senses bus drop across shunt resistor; open-collector output interfaces directly to fault latch. Use Value: Delivers 300 ns response with ±30 V input range - detects transient brownouts before power management ICs react. |
| Missile Guidance Signal Thresholding | Radiation-Hardened Sensor Interface |
Use Scenario: Converting analog gyro output to digital trigger for attitude correction pulses. IC Role / Device Role / Timing Role: Compares gyro signal to programmable threshold; strobe gated by inertial navigation system clock. Use Value: 200 nA input bias avoids loading high-impedance gyro outputs; radiation tolerance prevents false triggers during ascent radiation exposure. | Use Scenario: Interfacing thermocouple or strain gauge sensors in nuclear reactor instrumentation. IC Role / Device Role / Timing Role: Precision comparator with offset null adjusts for cold-junction compensation drift; operates at −55°C ambient. Use Value: ≤±3 mV offset voltage and −55°C to +125°C operation ensure accuracy across full reactor startup/shutdown thermal cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM111QMLV | Same die, identical radiation specs, but supplied in 14-pin CDIP (NAB008A); higher θJA (97°C/W) than TO-99 (162°C/W still air) | Preferred where board-level repairability or socketing is required; less suitable for high-power-density modules | Select LM111QMLV only if CDIP footprint and manual rework compatibility outweigh thermal performance needs. |
| LM111H | Commercial-grade variant; no radiation qualification; 25°C only temp range; 400 ns typical response vs 300 ns min for LM111WGRLQMLV | Restricted to ground-based test equipment or non-flight subsystems; not acceptable for space-rated designs | LM111H is unsuitable for any radiation-exposed or extended-temperature application requiring LM111WGRLQMLV's specifications. |
Compared with LM111QMLV and LM111H, the LM111WGRLQMLV uniquely combines TO-99 thermal performance, strobe-enabled timing control, and dual radiation certifications-making it the only option for compact, high-reliability, time-critical comparator functions in orbital systems.
Availability
LM111WGRLQMLV is available at Aetrix Electronics and suitable for satellite power sequencing, missile guidance thresholding, and nuclear instrumentation requiring stable component supply under extended temperature and radiation stress.
Supply support for LM111WGRLQMLV 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 U.S.-based semiconductor manufacturer specializing in analog and embedded processing solutions for aerospace, defense, and industrial markets.
The LM111 family was developed for high-reliability analog signal conditioning in radiation-intensive environments, with QMLV variants like LM111WGRLQMLV targeting flight-critical comparator functions in spacecraft and strategic systems.
FAQ
What is the maximum allowable differential input voltage for LM111WGRLQMLV?
The LM111WGRLQMLV supports a differential input voltage range of ±30 V, as specified in Absolute Maximum Ratings. This allows direct comparison of signals referenced to different supply domains-such as sensing a 28 V bus against a 5 V reference-without external attenuators or level shifters. The specification is validated across −55°C to +125°C and applies to both pre- and post-radiation operation per SMD 5962R0052402.
Does LM111WGRLQMLV support single-supply operation?
Yes, LM111WGRLQMLV operates from a single 5 V supply, as confirmed in the Features section of the SNOSAJ4C datasheet. It maintains full functionality-including strobe control, offset null, and 50 mA output sink-under this condition. Input common-mode range extends to within 1.5 V of the negative rail (GND), enabling robust interface with 5 V microcontrollers and logic circuits in compact avionics modules.
How is the strobe function implemented on LM111WGRLQMLV?
The strobe function is implemented on Pin 5 (BAL/STB), which acts as an active-low enable. When pulled low, the output enters high-impedance state regardless of input conditions-enabling synchronized sampling in time-critical systems like laser rangefinders. The datasheet specifies VOSt = 14 V minimum at ISt = −3 mA, confirming robust noise margin for TTL-compatible strobe drivers in flight computers.
What radiation certifications apply to LM111WGRLQMLV?
LM111WGRLQMLV is certified to 50 krad(Si) high-dose-rate and 100 krad(Si) ELDRS-free per MIL-STD-883 Method 1019 Condition A, as documented in SMD 5962R0052402. These qualifications were performed on QMLV devices and include delta testing showing ≤±0.5 mV VIO shift post-irradiation-ensuring stable trip thresholds throughout mission lifetime in LEO and MEO orbits.
Can LM111WGRLQMLV drive a relay directly?
Yes, LM111WGRLQMLV can drive a relay directly via its open-collector NPN output (Pin 6), which sinks up to 50 mA at 1.5 V saturation voltage. A pull-up resistor to V+ (e.g., +12 V) completes the path, allowing direct actuation of coils rated ≤50 mA-common in spacecraft pyro-switch controllers and launch abort system sequencers. Thermal derating per θJA = 162°C/W (TO-99, still air) must be observed at full load.
LM111WGRLQMLV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 10-CSOIC (0.241", 6.12mm Width)
- Series:
- LM111
- Packaging:
- Tray
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- Open-Collector
- Voltage - Supply, Single/Dual (±):
- 5V ~ 30V, ±2.5V ~ 15V
- :
- 3mV @ ±15V
- Voltage - Input Offset (Max):
- 0.1µA @ ±15V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 5mA, 6mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- 200ns (Typ)
- Propagation Delay (Max):
- -
- Hysteresis:
- -55°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 10-CFP
LM111WGRLQMLV FAQ
1.How can I place an order for LM111WGRLQMLV through Aetrix?
Please submit a Request for Quotation (RFQ) for LM111WGRLQMLV 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 LM111WGRLQMLV reliable?
The price and inventory of LM111WGRLQMLV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM111WGRLQMLV is usually 5 days.
3.What payment methods are accepted for LM111WGRLQMLV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM111WGRLQMLV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM111WGRLQMLV?
LM111WGRLQMLV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM111WGRLQMLV 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 LM111WGRLQMLV?
For technical support, including LM111WGRLQMLV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM111WGRLQMLV requirements.
6.How does Aetrix verify that LM111WGRLQMLV is sourced from the original manufacturer or authorized distributors?
All LM111WGRLQMLV 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 LM111WGRLQMLV meets industry standards.
7.What is the process for return or replacement of LM111WGRLQMLV?
All LM111WGRLQMLV units undergo pre-shipment inspection (PSI). If there is an issue with LM111WGRLQMLV, 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 LM111WGRLQMLV part is unused and in its original packaging.
Return procedure for LM111WGRLQMLV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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