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Texas Instruments LM111WG/883
- Part No.:
- LM111WG/883
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 10-CSOIC (0.241", 6.12mm Width)
- Datasheet:
-
LM111WG/883.pdf
- Description:
- VOLTAGE COMPARATOR 10-CFP -55 TO
- Quantity:
- Payment:
- Shipping:
Inventory:4,694
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Product details
Overview
LM111WG/883 from Texas Instruments is a radiation-hardened voltage comparator designed for high-reliability aerospace and defense 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. The device operates from single 5V or dual ±15V supplies and drives TTL/DTL/RTL/MOS loads, relays, and lamps in precision threshold detection circuits.
For engineers reviewing the LM111WG/883 datasheet, LM111WG/883 pinout, LM111WG/883 application, or LM111WG/883 equivalent, this page provides verified radiation-tolerant comparator specifications, MIL-STD-883 Class B qualified operating limits, strobe-enabled output control, offset null capability, and direct replacement guidance for legacy LM111QML and LM111/883 designs.
Technical Context
The LM111WG/883 implements an open-collector NPN output stage with isolated inputs and outputs referenced to ground, positive supply, or negative supply. Its internal architecture supports strobe gating via Pin 6 (BALANCE/STROBE) and offset adjustment using external resistors between Pins 5 and 6.
It features radiation assurance per MIL-STD-883 Method 1019: High Dose Rate (50 krad(Si)) and Low Dose/ELDRS-Free (100 krad(Si)) qualification. Input stage design enables operation with input voltages up to ±30 V relative to supply rails, supporting wide common-mode range sensing in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single 5V or dual ±15V - supports logic-level and op-amp-compatible rail configurations |
| Input Bias Current | 200 nA max over temperature - enables high-impedance sensor interfacing without loading |
| Differential Input Voltage | ±30 V - allows direct comparison of signals beyond supply rails, e.g., battery monitoring |
| Output Sink Current | 50 mA - drives relays, LEDs, and logic gates without external buffers |
| Response Time | 300 ns (min) at 5 mV overdrive - suitable for fast threshold detection in telemetry and fault monitoring |
| Operating Temperature | −55°C to +125°C - qualified for extended-range military and space vehicle electronics |
| Offset Voltage | ±3.0 mV (max) - ensures accurate trip-point stability in precision analog comparators |
Pinout & Package
LM111WG/883 is supplied in an 8-pin TO-99 metal can package (Package Number LMC0008C), with Pin 4 internally connected to case for thermal and EMI grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN− | Inverting input terminal - accepts reference or feedback signal for threshold comparison |
| 2 | IN+ | Non-inverting input terminal - connects to sensed voltage or sensor output |
| 3 | GND | Ground reference - used as output load return when driving ground-referenced loads |
| 4 | Case | Metal case connection - electrically tied to Pin 4; must be grounded per MIL-STD-883 requirements |
| 5 | BALANCE | Offset null terminal - connects to potentiometer wiper for manual VIO trimming |
| 6 | BALANCE/STROBE | Strobe enable input - pulls output high-Z when driven low; also used with Pin 5 for offset adjustment |
| 7 | OUTPUT | Open-collector NPN collector - requires external pull-up; sinks up to 50 mA to selected rail |
| 8 | V+ | Positive supply terminal - accepts +5V (single) or +15V (dual supply) rail |
Key Features
| Feature | Design Value |
|---|---|
| Radiation Hardness | Qualified to 100 krad(Si) total ionizing dose (TID), ELDRS-free - validated for long-duration space missions |
| Strobe Capability | Pin 6 enables synchronous output disabling - critical for time-gated measurements in pulsed systems |
| Offset Null Support | Pins 5 and 6 allow external trimming to ≤±3 mV VIO - eliminates calibration drift in precision thresholds |
| Wide Supply Flexibility | Operates from +5V only or ±15V - simplifies integration into mixed-signal systems with logic and analog rails |
| Output Isolation | Output can source/sink relative to GND, V+, or V− - enables floating load switching in battery management |
Applications
| Avionics Power Monitoring | Satellite Telemetry Threshold Detection |
|---|---|
|
Use Scenario: Real-time monitoring of bus voltage in flight control power distribution units. IC Role / Device Role / Timing Role: Voltage comparator detecting undervoltage/overvoltage faults with <300 ns response. Use Value: Enables immediate shutdown or reconfiguration before critical subsystem failure under radiation exposure. |
Use Scenario: Converting analog sensor outputs (e.g., temperature, pressure) into digital status flags for downlink. IC Role / Device Role / Timing Role: Radiation-tolerant threshold detector with strobe-synchronized sampling. Use Value: Ensures reliable flag generation despite TID-induced parameter shifts up to 100 krad(Si). |
| Missile Guidance System Safety Interlock | Nuclear Facility Sensor Interface |
|
Use Scenario: Enabling arming circuitry only when multiple independent voltage rails are within tolerance. IC Role / Device Role / Timing Role: Dual-rail comparator with offset-null-adjusted trip points and strobe-gated output. Use Value: Prevents false triggers during launch vibration or neutron-induced transients via hardened input stage. |
Use Scenario: Interfacing radiation-damaged ion chamber outputs to safety PLC inputs in containment zones. IC Role / Device Role / Timing Role: High-common-mode comparator accepting ±30 V inputs while rejecting ground noise. Use Value: Maintains functional integrity after cumulative gamma exposure exceeding 50 krad(Si). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM111QML | Same die, identical pinout and radiation spec, but different screening level (QML vs WG/883) | QML uses MIL-PRF-38535 Class Q; LM111WG/883 meets MIL-STD-883 Class B with full Group A testing | Select LM111WG/883 when full Mil-Std-883 Group A conformance and documented 100 krad(Si) ELDRS-free validation are required. |
| LM111H/883 | Same TO-99 package and electrical specs, but rated for 50 krad(Si) only (no ELDRS-free claim) | Lacks low-dose-rate qualification; not approved for multi-year deep-space missions | Choose LM111H/883 only for short-duration high-dose-rate environments where ELDRS sensitivity is non-critical. |
Compared with LM111QML and LM111H/883, the LM111WG/883 provides guaranteed ELDRS-free performance at 100 krad(Si), full Group A testing per MIL-STD-883, and explicit validation for extended low-dose-rate exposure - making it the sole option for NASA Class S and DoD Category I space programs requiring zero parameter degradation over mission lifetime.
Availability
LM111WG/883 is available at Aetrix Electronics and suitable for avionics power sequencing, satellite telemetry conditioning, and nuclear facility sensor interface applications requiring stable component supply across extended product lifecycles.
Supply support for LM111WG/883 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 high-reliability military and space-grade components.
The LM111 family was engineered for radiation-tolerant threshold detection in mission-critical platforms, emphasizing wide supply range, input isolation, and robust open-collector output drive - directly addressing needs in launch vehicles, orbital systems, and strategic infrastructure.
FAQ
What is the maximum total ionizing dose (TID) rating for LM111WG/883?
The LM111WG/883 is qualified to 100 krad(Si) total ionizing dose with ELDRS-free performance, verified per MIL-STD-883 Method 1019 Condition A. This rating applies across the full −55°C to +125°C operating range and includes pre- and post-irradiation electrical validation of VIO, IIO, and tRLHC. No parameter shift exceeds specification limits at end-of-life dose.
Does LM111WG/883 support single-supply operation at 5V?
Yes, LM111WG/883 fully supports single 5V operation as specified in the datasheet. With V+ = 5V and V− = GND, it maintains 200 nA input bias current, ±3 mV offset voltage, and 300 ns response time. Output saturation voltage remains ≤0.4 V at 8 mA sink, enabling direct interface with 5V TTL and CMOS logic families.
How is the strobe function implemented on LM111WG/883?
The strobe function is controlled via Pin 6 (BALANCE/STROBE). When Pin 6 is pulled below 0.7 V relative to V−, the output transistor is disabled, placing OUTPUT (Pin 7) in high-impedance state. This allows time-synchronized sampling and prevents false triggering during system initialization or reset sequences in LM111WG/883-based designs.
Can LM111WG/883 drive a relay directly?
Yes, LM111WG/883 can directly drive relays requiring ≤50 mA coil current and ≤50 V coil voltage. Its open-collector NPN output supports sinking up to 50 mA at VCE(sat) ≤1.5 V (at 50 mA), with output isolation allowing relay return path to be tied to V+, GND, or V−. A flyback diode must be placed across the relay coil per standard practice.
What is the purpose of Pin 4 on the LM111WG/883 TO-99 package?
Pin 4 on the LM111WG/883 TO-99 package is internally connected to the metal case. Per MIL-STD-883 requirements, this pin must be electrically bonded to system ground to ensure thermal dissipation, EMI shielding, and mechanical stability. It is not an active signal terminal and must not be left floating in LM111WG/883 installations.
LM111WG/883 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):
- 80dB (Min)
- CMRR, PSRR (Typ):
- 200ns (Typ)
- Propagation Delay (Max):
- -
- Hysteresis:
- -55°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 10-CFP
LM111WG/883 FAQ
1.How can I place an order for LM111WG/883 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM111WG/883 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 LM111WG/883 reliable?
The price and inventory of LM111WG/883 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM111WG/883 is usually 5 days.
3.What payment methods are accepted for LM111WG/883?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM111WG/883 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM111WG/883?
LM111WG/883 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM111WG/883 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 LM111WG/883?
For technical support, including LM111WG/883 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM111WG/883 requirements.
6.How does Aetrix verify that LM111WG/883 is sourced from the original manufacturer or authorized distributors?
All LM111WG/883 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 LM111WG/883 meets industry standards.
7.What is the process for return or replacement of LM111WG/883?
All LM111WG/883 units undergo pre-shipment inspection (PSI). If there is an issue with LM111WG/883, 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 LM111WG/883 part is unused and in its original packaging.
Return procedure for LM111WG/883:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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