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Texas Instruments LM111H/NOPB
- Part No.:
- LM111H/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- TO-99-8 Metal Can
- Datasheet:
-
LM111H/NOPB.pdf
- Description:
- IC COMPARATOR 1 GEN PUR TO99-8
- Quantity:
- Payment:
- Shipping:
Inventory:3,329
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Product details
Overview
LM111H/NOPB from Texas Instruments is a precision voltage comparator with ±30V differential input range, 200 ns response time, and operation from single 5V or dual ±15V supplies. It features strobe control, offset balancing pins, open-collector output capable of switching up to 50V/50mA loads, and is rated for −55°C to +125°C industrial/military temperature range.
For engineers reviewing the LM111H/NOPB datasheet, LM111H/NOPB pinout, LM111H/NOPB application, or LM111H/NOPB equivalent, this page delivers verified electrical specs, TO-99 package layout, real-world use cases including zero-crossing detection and relay driving, and validated alternative options for high-reliability analog signal conditioning designs.
Technical Context
The LM111H/NOPB uses a bipolar input stage with 150 nA max input bias current and 20 nA max offset current over temperature, enabling accurate threshold detection in high-impedance sensor interfaces. Its open-collector output supports wire-OR configurations and direct drive of TTL, DTL, MOS, lamps, or relays without external pull-up constraints.
Strobe functionality disables the output when 3–5 mA is drawn from Pin 6, allowing synchronized sampling or power-gated operation. Offset adjustment via Pins 5 and 6 permits trimming of up to ±8 mV input offset voltage, critical for precision level detection in measurement systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | Single 5V or dual ±15V - supports logic-level and op-amp-compatible rails in mixed-signal systems. |
| Response Time | 200 ns (100 mV step, 5 mV overdrive) - enables fast edge detection in timing-critical comparators. |
| Differential Input Voltage | ±30V - allows direct comparison of signals referenced to different potentials, e.g., isolated transducer outputs. |
| Output Drive Capability | 50V/50mA sink - directly switches relays, lamps, or logic gates without buffer stages. |
| Input Bias Current | 150 nA max over temperature - preserves accuracy in high-Z resistor-divider or photodiode front-ends. |
| Operating Temperature | −55°C to +125°C - qualified for aerospace, military, and extended-temperature industrial environments. |
| Strobe Control Current | 3–5 mA draw from Pin 6 - enables precise timing-gated output disable without grounding risk. |
Pinout & Package
LM111H/NOPB is housed in an 8-pin hermetic TO-99 metal can package (LMC outline), with center tab connected to Pin 4 (Ground). The package provides excellent thermal stability and EMI shielding for precision analog applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Output Collector | Open-collector NPN output - requires external pull-up; sinks up to 50 mA at ≤1.5 V saturation. |
| 2 | Inverting Input (−) | Differential input node - accepts voltages from −14.5 V to +13.8 V with ±15 V supplies. |
| 3 | Non-Inverting Input (+) | Differential input node - same common-mode range as Pin 2; used for reference or signal input. |
| 4 | Ground | Reference node for internal circuitry; also connects to metal can tab for shielding and thermal path. |
| 5 | Offset Null (−) | Adjusts input offset voltage negative side - used with Pin 6 and external potentiometer for trimming. |
| 6 | Strobe / Offset Null (+) | Strobe enable (current-sink mode) or positive offset adjust - never grounded; 3–5 mA draw disables output. |
| 7 | Positive Supply (V+) | Connects to +5V or +15V rail - powers internal circuitry and defines upper output swing limit. |
| 8 | Negative Supply (V−) | Connects to ground (single supply) or −15V rail - sets lower reference and enables bipolar operation. |
Key Features
| Feature | Design Value |
|---|---|
| Isolated Inputs & Outputs | Both input terminals and output collector float relative to system ground - enables level-shifting and ground-loop-free interfacing. |
| Wire-OR Output Capability | Multiple LM111H/NOPB outputs can share a single pull-up resistor - simplifies multi-channel alarm or priority encoder logic. |
| Strobe-Controlled Output Disable | Pin 6 current-sink action fully disables output state - eliminates need for external gate logic in time-multiplexed systems. |
| Offset Voltage Trim Range | Up to ±8 mV adjustable via Pins 5/6 - corrects sensor drift or reference inaccuracies in precision threshold applications. |
| High Common-Mode Rejection | Input stage rejects noise up to ±15 V common-mode voltage - maintains accuracy in noisy motor-drive or power-supply monitoring. |
Applications
| Zero-Crossing Detection | Relay & Solenoid Driving |
|---|---|
|
Use Scenario: Detecting AC line voltage polarity transitions in power inverters or energy metering systems. IC Role / Device Role / Timing Role: Comparator compares sinusoidal input against 0 V reference to generate clean digital zero-cross pulses. Use Value: 200 ns propagation delay ensures sub-microsecond timing resolution; ±30 V input range accommodates full-wave rectified inputs without attenuation. |
Use Scenario: Controlling industrial relays or solenoids from microcontroller GPIOs with galvanic isolation. IC Role / Device Role / Timing Role: Acts as high-voltage interface between low-power logic and inductive load, absorbing kickback via internal clamp design. Use Value: 50V/50mA output sink drives coils directly; strobe pin enables synchronized de-energization to suppress arcing. |
| Photodiode Signal Conditioning | Peak Detector Circuits |
|
Use Scenario: Amplifying and thresholding low-current photodiode outputs in optical encoders or smoke detectors. IC Role / Device Role / Timing Role: Compares photodiode current-derived voltage against programmable reference to detect light intensity thresholds. Use Value: 150 nA max input bias current prevents signal loss in high-impedance transimpedance amplifier outputs. |
Use Scenario: Capturing and holding maximum amplitude of analog waveforms in test equipment or audio peak meters. IC Role / Device Role / Timing Role: Comparator triggers MOSFET switch to charge hold capacitor when input exceeds stored peak value. Use Value: Open-collector output interfaces cleanly with external FET gate drivers; strobe function freezes capture during readout cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM311H/NOPB | Same TO-99 package and pinout; wider input bias current (300 nA max) and reduced temp range (0°C to +70°C). | Not suitable for extended-temperature or ultra-low-input-bias applications like precision sensor front-ends. | Select LM111H/NOPB when −55°C to +125°C operation or sub-200 nA input bias is required. |
| LM211H/NOPB | Identical electrical specs to LM111H/NOPB except operating temperature range limited to −25°C to +85°C. | Acceptable for commercial-grade instrumentation but not aerospace or under-hood automotive use. | Choose LM111H/NOPB for full military-spec temperature compliance and long-term reliability validation. |
Compared with LM311H/NOPB and LM211H/NOPB, the LM111H/NOPB uniquely guarantees −55°C to +125°C performance with ≤150 nA input bias current, making it the only option qualified for high-reliability, extended-temperature analog threshold detection where parametric stability is non-negotiable.
Availability
LM111H/NOPB is available at Aetrix Electronics and suitable for precision analog threshold detection, industrial relay control, zero-crossing sensing, and high-reliability sensor interface applications requiring stable component supply across extended temperature ranges.
Supply support for LM111H/NOPB 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 with decades of heritage in precision linear ICs.
The LM111 series was designed for high-stability, wide-supply-range voltage comparison in mission-critical analog systems - particularly where input isolation, strobe control, and extended temperature operation are mandatory.
FAQ
What is the maximum differential input voltage rating for LM111H/NOPB?
The LM111H/NOPB has a maximum differential input voltage rating of ±30V, as specified in the Absolute Maximum Ratings table. This allows the device to compare signals referenced to different supply domains - for example, detecting overvoltage on a +24V rail using a ground-referenced reference. Exceeding ±30V risks permanent damage to the input stage, regardless of common-mode voltage.
Can LM111H/NOPB operate from a single 5V supply?
Yes, the LM111H/NOPB is explicitly characterized for operation from a single 5V supply, as confirmed in the Features section and Electrical Characteristics tables. With V− tied to ground and V+ at +5V, it delivers 0.23 V typical saturation voltage at 8 mA load and maintains full functionality including strobe and offset trim - making it suitable for modern low-voltage embedded systems.
What is the purpose of the strobe pin (Pin 6) on LM111H/NOPB?
Pin 6 serves as the strobe input: drawing 3–5 mA from this pin disables the output transistor, forcing the collector (Pin 1) into high-impedance state. This is not a logic-level enable - grounding Pin 6 will damage the device. The strobe function enables time-gated comparisons, such as sampling during specific phases of a switching cycle or synchronizing multiple comparators in data acquisition systems.
How does LM111H/NOPB differ from LM311H/NOPB in terms of temperature rating?
The LM111H/NOPB is rated for −55°C to +125°C operation, while the LM311H/NOPB is limited to 0°C to +70°C. This difference stems from distinct process qualifications and screening - the LM111H/NOPB undergoes military-grade testing per RETS111X specifications, making it appropriate for avionics, downhole tools, and other extreme-environment applications where the LM311H/NOPB would fail qualification.
Is LM111H/NOPB pin-compatible with LM106 or LM710 comparators?
Yes, the LM111H/NOPB shares identical pin configuration with the LM106 and LM710 in the TO-99 package, as stated in the datasheet Description section. However, it is not a drop-in replacement due to key differences: LM111H/NOPB has much lower input bias current (150 nA vs. ~500 nA), slower response (200 ns vs. 40 ns), and added strobe/offset features - requiring circuit review before substitution.
LM111H/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-99-8 Metal Can
- Series:
- -
- Packaging:
- Box
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 1
- Output Type:
- DTL, MOS, Open-Collector, Open-Emitter, RTL, TTL
- Voltage - Supply, Single/Dual (±):
- 5V ~ 36V, ±2.5V ~ 18V
- :
- 3mV @ ±15V
- Voltage - Input Offset (Max):
- 0.1µA @ ±15V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 6mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -55°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Through Hole
- :
- TO-99-8
LM111H/NOPB FAQ
1.How can I place an order for LM111H/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM111H/NOPB 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 LM111H/NOPB reliable?
The price and inventory of LM111H/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM111H/NOPB is usually 5 days.
3.What payment methods are accepted for LM111H/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM111H/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM111H/NOPB?
LM111H/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM111H/NOPB 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 LM111H/NOPB?
For technical support, including LM111H/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM111H/NOPB requirements.
6.How does Aetrix verify that LM111H/NOPB is sourced from the original manufacturer or authorized distributors?
All LM111H/NOPB 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 LM111H/NOPB meets industry standards.
7.What is the process for return or replacement of LM111H/NOPB?
All LM111H/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM111H/NOPB, 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 LM111H/NOPB part is unused and in its original packaging.
Return procedure for LM111H/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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