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Texas Instruments LM111WGLQMLV
- Part No.:
- LM111WGLQMLV
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 10-CSOIC (0.241", 6.12mm Width)
- Datasheet:
-
LM111WGLQMLV.pdf
- Description:
- VOLTAGE COMPARATOR 10-CFP -55 TO
- Quantity:
- Payment:
- Shipping:
Inventory:4,457
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Product details
Overview
LM111WGLQMLV from Texas Instruments is a radiation-hardened voltage comparator designed for space and high-reliability military systems. It delivers 200 nA max input current, ±30 V differential input range, and 50 mA output sink capability across −55°C to +125°C. Its strobe function, offset null capability, and compatibility with TTL/DTL/RTL loads enable precise threshold detection in satellite power sequencing and avionics sensor interfaces.
For engineers reviewing the LM111WGLQMLV datasheet, LM111WGLQMLV pinout, LM111WGLQMLV application, or LM111WGLQMLV equivalent, this device supports single 5V or dual ±15V operation, offers radiation assurance up to 100 krad(Si) (ELDRS-free), and provides wire-ORable open-collector output for fault-tolerant monitoring architectures.
Technical Context
The LM111WGLQMLV implements a bipolar input stage with balanced differential pair architecture, enabling low input bias current and stable operation under ionizing radiation exposure. Its internal strobe circuit allows synchronous comparison gating, while the balance/strobe pin (Pin 6) supports both offset nulling and external enable control.
Unlike standard comparators, it features isolated inputs and output referenced to ground, positive supply, or negative supply - critical for floating bus monitoring in spacecraft power distribution units. The device maintains functional integrity after 100 krad(Si) total ionizing dose without ELDRS degradation, verified per MIL-STD-883 Method 1019 Condition D.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | Max 150 nA over temperature - enables high-impedance sensor interfacing without signal loading |
| Offset Voltage | ±4.0 mV max - ensures accurate threshold detection in precision analog monitoring |
| Response Time | 300 ns (min) at 5 mV overdrive - supports fast transient detection in fault protection circuits |
| Supply Range | Single 5V to dual ±15V - interoperates with logic and legacy op-amp rails |
| Output Sink Current | 50 mA - directly drives relays, lamps, or TTL-compatible inputs without external buffers |
| Radiation Tolerance | 100 krad(Si), ELDRS-free - qualified for long-duration missions in geosynchronous orbit |
| Operating Temp | −55°C to +125°C - meets MIL-PRF-38535 Class V requirements for harsh-environment deployment |
Pinout & Package
LM111WGLQMLV is supplied in a 20-lead LCCC (Leadless Chip Carrier) package (Package Number NAJ0020A), hermetically sealed and qualified for space applications. Thermal resistance θJA is 90°C/W (still air) and 65°C/W (500 LF/min airflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 | No Connect | Unused terminals electrically isolated; no internal connection or function |
| 6 | Balance / Strobe | Combined offset null adjustment and external enable/disable control; active-low strobe |
| 7 | Output | Open-collector NPN output; requires external pull-up for logic-level interface |
| 8 | V+ | Positive supply terminal; supports up to +30 V absolute maximum rating |
| 20 | V− | Negative supply terminal; supports down to −30 V absolute maximum rating |
Key Features
| Feature | Design Value |
|---|---|
| Strobe Capability | Enables synchronized comparison windows for time-gated sensing in pulsed systems |
| Offset Null Adjustment | Allows fine-tuning of trip point via external potentiometer between Pins 5 and 6 |
| Wire-ORable Output | Multiple LM111WGLQMLV outputs can share a common pull-up for priority-based alarm aggregation |
| Ground-Isolated I/O | Inputs and output operate independently of system ground - essential for floating bus monitoring |
| High-Voltage Output Drive | Switches loads up to 50 V at 50 mA - eliminates need for external driver stages in actuator control |
Applications
| Power Sequencing Monitor | Satellite Bus Voltage Supervisor |
|---|---|
Use Scenario: Monitoring rail sequencing during satellite payload power-up to prevent latch-up or brownout. IC Role / Device Role / Timing Role: Voltage comparator detecting sequential rise/fall thresholds on 5V, ±15V, and 28V rails. Use Value: Ensures strict ordering compliance per ECSS-E-ST-20-07C, leveraging wide supply range and radiation tolerance. | Use Scenario: Real-time supervision of primary and backup power buses in LEO communication satellites. IC Role / Device Role / Timing Role: Dual-rail comparator with strobe gating to reject EMI during RF transmission bursts. Use Value: Maintains functional integrity after 100 krad(Si) exposure, eliminating recalibration needs over mission lifetime. |
| Avionics Sensor Threshold Detector | Radiation-Hardened Fault Annunciator |
Use Scenario: Converting analog transducer outputs (e.g., pressure, temperature) into discrete fault flags. IC Role / Device Role / Timing Role: Precision comparator with <±4 mV offset ensuring sub-1% trip accuracy across temperature. Use Value: Eliminates drift-induced false alarms in flight-critical systems operating from −55°C to +125°C. | Use Scenario: Aggregating multiple fault signals (overvoltage, overcurrent, thermal) into a single OR'ed alarm line. IC Role / Device Role / Timing Role: Open-collector output enabling wired-OR configuration with other comparators. Use Value: Reduces board area and interconnect complexity while preserving fault isolation integrity. |
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 packaged in 14-lead CDIP (NAB008A); higher θJA (97°C/W) | Preferred where through-hole assembly or manual rework is required; less suitable for high-density PCBs | Select LM111WGLQMLV for surface-mount LCCC integration and improved thermal performance in compact modules. |
| LM111H | Commercial-grade version; no radiation qualification; wider offset voltage (±6 mV) and higher input bias current (250 nA) | Restricted to non-space, non-mission-critical terrestrial applications only | LM111WGLQMLV is mandatory for programs requiring MIL-PRF-38535 Class V or ESA ESCC 22900 compliance. |
Compared with LM111QMLV and LM111H, the LM111WGLQMLV provides superior thermal dissipation in LCCC packaging, guaranteed ELDRS-free operation up to 100 krad(Si), and tighter offset voltage specification - making it the sole choice for flight-critical comparator functions in modern small satellites.
Availability
LM111WGLQMLV is available at Aetrix Electronics and suitable for satellite power management, avionics health monitoring, and radiation-hardened instrumentation requiring stable component supply across extended product lifecycles.
Supply support for LM111WGLQMLV 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 heritage in space-grade component development.
The LM111 family was engineered specifically for high-reliability analog signal conditioning in radiation-intensive environments, supporting NASA, ESA, and DoD programs since the 1970s.
FAQ
What is the maximum allowable differential input voltage for LM111WGLQMLV?
The LM111WGLQMLV supports a differential input voltage range of ±30 V, as specified in Absolute Maximum Ratings. This allows direct interfacing with high-voltage sensor outputs or unregulated power rails without external attenuation, provided common-mode limits (±15 V relative to supplies) are observed.
Does LM111WGLQMLV require external pull-up resistors on its output?
Yes, LM111WGLQMLV features an open-collector NPN output (Pin 7). An external pull-up resistor to V+ or another logic rail is mandatory to establish a defined HIGH state. Typical values range from 1 kΩ to 10 kΩ depending on speed and load requirements.
Can LM111WGLQMLV operate from a single 5V supply?
Yes, LM111WGLQMLV is fully specified for single 5V operation per its datasheet. Input common-mode range extends to within 1.5 V of V− (ground), and output saturation voltage remains ≤0.4 V at 8 mA sink current - enabling robust TTL/CMOS interfacing.
What is the purpose of the Balance/Strobe pin (Pin 6) on LM111WGLQMLV?
Pin 6 serves dual functions: (1) Offset null adjustment when used with an external potentiometer between Pins 5 and 6; (2) Strobe enable/disable control - pulling Pin 6 low disables comparison and forces output HIGH (open-collector inactive), enabling synchronized sampling.
Is LM111WGLQMLV qualified for use in geosynchronous orbit missions?
Yes, LM111WGLQMLV is qualified to 100 krad(Si) total ionizing dose with ELDRS-free performance per MIL-STD-883 Method 1019 Condition D. Its radiation assurance, combined with −55°C to +125°C operation and hermetic LCCC packaging, meets typical GSO mission requirements.
LM111WGLQMLV 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
LM111WGLQMLV FAQ
1.How can I place an order for LM111WGLQMLV through Aetrix?
Please submit a Request for Quotation (RFQ) for LM111WGLQMLV 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 LM111WGLQMLV reliable?
The price and inventory of LM111WGLQMLV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM111WGLQMLV is usually 5 days.
3.What payment methods are accepted for LM111WGLQMLV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM111WGLQMLV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM111WGLQMLV?
LM111WGLQMLV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM111WGLQMLV 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 LM111WGLQMLV?
For technical support, including LM111WGLQMLV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM111WGLQMLV requirements.
6.How does Aetrix verify that LM111WGLQMLV is sourced from the original manufacturer or authorized distributors?
All LM111WGLQMLV 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 LM111WGLQMLV meets industry standards.
7.What is the process for return or replacement of LM111WGLQMLV?
All LM111WGLQMLV units undergo pre-shipment inspection (PSI). If there is an issue with LM111WGLQMLV, 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 LM111WGLQMLV part is unused and in its original packaging.
Return procedure for LM111WGLQMLV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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