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Texas Instruments LMC7111BIM5/NOPB
- Part No.:
- LMC7111BIM5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMC7111BIM5/NOPB.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LMC7111BIM5/NOPB from Texas Instruments is a micropower CMOS operational amplifier in a 5-pin SOT-23 package, delivering rail-to-rail input and output swing, 50 kHz gain-bandwidth at 5 V, 25 µA quiescent current, and ±0.9 mV input offset voltage - enabling precision low-power signal conditioning in space-constrained battery-powered systems like portable medical sensors and GaAs RF bias circuits.
For engineers reviewing the LMC7111BIM5/NOPB datasheet, LMC7111BIM5/NOPB pinout, LMC7111BIM5/NOPB application, or LMC7111BIM5/NOPB equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, application-specific implementation insights, and two confirmed alternative options for similar micropower rail-to-rail op-amp use cases.
Technical Context
The LMC7111BIM5/NOPB employs a CMOS input stage with >10 TΩ input resistance and sub-picoamp bias current (±0.1 pA typical), supporting high-impedance sensor interfacing without loading. Its rail-to-rail input extends to within 0.1 V of either supply rail, and output swings to within 20 mV of rails under 100 kΩ load - critical for single-supply operation in battery-monitoring and reference buffering.
Specified across 2.7 V, 5 V, and 10 V supplies, it maintains stable phase margin (>50°) and capacitive load drive up to 300 pF at unity gain. The device avoids phase inversion beyond the negative rail and features 110 nV/√Hz input voltage noise at 1 kHz - optimized for DC-coupled, low-frequency precision amplification rather than high-speed signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5 V to 11 V - supports direct integration into Li-ion (3.0–4.2 V), 5 V logic, and 9–10 V industrial rails without level-shifting. |
| Quiescent Current | 25 µA typical at 5 V - enables multi-year battery life in always-on sensor nodes and portable instrumentation. |
| Gain-Bandwidth Product | 50 kHz at 5 V - sufficient for DC–10 kHz signal conditioning (e.g., thermistor, strain gauge, pH electrode outputs). |
| Input Offset Voltage | ±0.9 mV max at 25°C - ensures <0.1% error in 1 V full-scale reference buffering and current-sense amplifier front-ends. |
| Output Swing | To within 20 mV of rails at 100 kΩ load - allows full utilization of ADC reference range and complete saturation control of external FETs or LEDs. |
| Input Bias Current | ±0.1 pA typical - eliminates significant voltage error across >1 MΩ feedback networks used in photodiode transimpedance stages. |
| Common-Mode Range | Extends 0.1 V beyond V− and to V+ − 0.1 V - enables direct sensing of battery voltages exceeding supply rails in fuel gauging circuits. |
Pinout & Package
LMC7111BIM5/NOPB uses the DBV (SOT-23-5) package: 2.9 mm × 2.8 mm footprint, 1.43 mm height, surface-mount, lead-free (Sn), RoHS-compliant, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Delivers rail-to-rail voltage swing; drives 100 kΩ loads to within 20 mV of supply rails; requires isolation resistor for >300 pF capacitive loads. |
| 2 (V+) | Positive supply | Accepts 2.5–11 V; connects to main system rail or regulated LDO output; decoupling capacitor (0.1 µF) required near pin. |
| 3 (+IN) | Noninverting input | High-impedance CMOS node (>10 TΩ); accepts signals from 0.1 V below V− to 0.1 V above V+; no phase inversion on overdrive. |
| 4 (−IN) | Inverting input | Matches +IN in impedance and common-mode range; used in transimpedance, difference, and active filter configurations. |
| 5 (V−) | Negative supply | Ground-referenced in single-supply mode; supports split-rail operation down to –5 V; must be tied to system ground or negative rail. |
Key Features
| Feature | Design Value |
|---|---|
| Tiny SOT-23-5 footprint | Enables placement directly at sensor or ADC reference pins, reducing PCB trace length, noise pickup, and layout complexity in handheld devices. |
| Rail-to-rail I/O | Maximizes dynamic range in single-supply systems: full-scale input sensing and output drive without headroom loss - critical for 3.3 V microcontroller analog interfaces. |
| 25 µA quiescent current | Reduces average power to <125 µW at 5 V, allowing integration into ultra-low-power wake-on-event circuits without compromising battery runtime. |
| 10 TΩ input resistance | Eliminates loading error in high-Z sources (e.g., piezoelectric sensors, pH electrodes, thermocouples with cold-junction compensation), preserving signal fidelity. |
| 300 pF capacitive load drive | Supports direct connection to ADC input capacitance or multiplexer channels without external isolation resistors in most 12-bit–16-bit sampling applications. |
Applications
| Battery Voltage Monitoring | Reference Buffering for ADCs |
|---|---|
|
Use Scenario: Monitoring Li-ion cell voltage during charge/discharge cycles in portable power tools or wearables, where supply voltage drops from 4.2 V to 2.8 V. IC Role / Device Role: Precision unity-gain buffer amplifying the cell voltage to an MCU's ADC input while rejecting supply ripple. Use Value: Rail-to-rail input accepts signals up to 4.2 V even when V+ = 3.3 V; 25 µA IQ minimizes parasitic drain on the monitored battery itself. |
Use Scenario: Stabilizing the 2.5 V reference voltage for a 16-bit SAR ADC in a portable data logger measuring temperature and humidity. IC Role / Device Role: Low-noise, low-offset voltage follower isolating the reference from ADC dynamic current draw. Use Value: ±0.9 mV VOS contributes <0.036% gain error; 20 mV rail-to-rail swing ensures full 2.5 V reference utilization without clipping. |
| Current Sensing in Battery Chargers | Stable Bias for GaAs RF Amplifiers |
|
Use Scenario: Amplifying mV-level shunt voltage in a 2 A USB-C PD charger to enable accurate charge current regulation. IC Role / Device Role: High-common-mode, low-VOS difference amplifier front-end with matched internal resistors or external precision gain network. Use Value: Input common-mode range to V+ − 0.1 V allows direct sensing across shunt placed on high-side of charging path; pA-level IB prevents offset drift over temperature. |
Use Scenario: Generating precise negative gate bias for GaAs FETs in 5G small-cell front-end modules, where thermal stability and board space are critical. IC Role / Device Role: Inverting amplifier configured as stable, low-noise negative voltage source referenced to RF ground. Use Value: 110 nV/√Hz noise and 50° phase margin prevent oscillation in RF-sensitive layouts; SOT-23 size allows placement adjacent to GaAs die on compact RF PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower rail-to-rail op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC6462IMX/NOPB | Dual-channel, 55 kHz GBW, ±0.25 mV VOS (A-grade), 32 µA IQ per channel, SOIC-8 package. | Better offset and bandwidth but larger footprint; suited for dual-sensor systems requiring matched pair performance. | Select when dual amplification is needed and board area permits SOIC-8; not drop-in due to different pinout and package. |
| LMC7101AIM5/NOPB | Single-channel, 150 kHz GBW, ±0.8 mV VOS, 80 µA IQ, same SOT-23-5 package, higher slew rate (0.06 V/µs). | Higher speed and drive capability but 3× higher supply current; preferred for dynamic reference buffering in fast-sampling ADCs. | Choose when >100 kHz closed-loop bandwidth or faster settling is required; pin-compatible replacement with no PCB changes. |
Compared with LMC6462IMX/NOPB, the LMC7111BIM5/NOPB offers superior board-space efficiency and lower power, making it optimal for single-channel, ultra-low-power placements; versus LMC7101AIM5/NOPB, it trades bandwidth for 69% lower IQ - ideal for static or slowly varying sensor signals where battery life dominates speed requirements.
Availability
LMC7111BIM5/NOPB is available at Aetrix Electronics and suitable for portable computing, mobile communications, and battery-powered sensor interface applications requiring stable component supply across long product lifecycles.
Supply support for LMC7111BIM5/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 connectivity technologies, with decades of expertise in precision amplifiers and low-power signal-chain solutions.
The LMC7111BIM5/NOPB belongs to TI's LMC71xx family of micropower CMOS op-amps, designed specifically for space- and energy-constrained applications including portable instrumentation, battery monitoring, and sensor signal conditioning.
FAQ
What is the maximum supply voltage for LMC7111BIM5/NOPB?
The absolute maximum supply voltage (V+ to V−) for LMC7111BIM5/NOPB is 11 V, with recommended operation from 2.5 V to 10 V. Exceeding 11 V risks permanent damage per Absolute Maximum Ratings. At 10 V, it delivers 50 kHz GBW, 25 µA IQ, and rail-to-rail output swing to within 20 mV of rails under 100 kΩ load - confirming robustness across common battery and industrial rails.
Does LMC7111BIM5/NOPB support rail-to-rail input and output simultaneously?
Yes, LMC7111BIM5/NOPB supports true rail-to-rail input (common-mode range extends 0.1 V beyond both V− and V+) and rail-to-rail output (swings to within 20 mV of either rail at 100 kΩ load). This enables full utilization of supply voltage in single-supply configurations - for example, buffering a 2.5 V reference with 0–2.5 V output swing while accepting input signals from 0 V to 2.6 V.
What is the input bias current specification for LMC7111BIM5/NOPB?
The input bias current for LMC7111BIM5/NOPB is ±0.1 pA typical at 25°C, with ±20 pA maximum over –40°C to +85°C. This ultra-low value stems from its CMOS input stage and ensures negligible voltage error across high-value feedback resistors (e.g., 10 MΩ), making it ideal for photodiode amplification and high-impedance sensor interfaces where leakage would otherwise dominate accuracy.
Can LMC7111BIM5/NOPB drive capacitive loads directly?
LMC7111BIM5/NOPB can directly drive up to 300 pF capacitive load at unity gain with VS = 10 V without oscillation, as verified in typical characteristics. For loads >300 pF - such as ADC inputs or multiplexers - a series isolation resistor (e.g., 10–100 Ω) between OUT and the load restores phase margin and prevents ringing, per Figure 7-1 in the official datasheet.
Is LMC7111BIM5/NOPB pin-compatible with other SOT-23-5 op-amps?
LMC7111BIM5/NOPB follows the standard SOT-23-5 pinout (OUT, V+, +IN, −IN, V−), matching industry conventions used by TI's LMC7101, LMC7131, and many third-party micropower op-amps. This allows direct substitution in existing layouts when electrical specs align - though functional validation (e.g., GBW, VOS, IQ) remains essential before replacement.
LMC7111BIM5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.03V/µs
- Gain Bandwidth Product:
- 50 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.1 pA
- Voltage - Input Offset:
- 900 µV
- Current - Supply:
- 25µA
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 11 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LMC7111BIM5/NOPB FAQ
1.How can I place an order for LMC7111BIM5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC7111BIM5/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 LMC7111BIM5/NOPB reliable?
The price and inventory of LMC7111BIM5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC7111BIM5/NOPB is usually 5 days.
3.What payment methods are accepted for LMC7111BIM5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC7111BIM5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC7111BIM5/NOPB?
LMC7111BIM5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC7111BIM5/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 LMC7111BIM5/NOPB?
For technical support, including LMC7111BIM5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC7111BIM5/NOPB requirements.
6.How does Aetrix verify that LMC7111BIM5/NOPB is sourced from the original manufacturer or authorized distributors?
All LMC7111BIM5/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 LMC7111BIM5/NOPB meets industry standards.
7.What is the process for return or replacement of LMC7111BIM5/NOPB?
All LMC7111BIM5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMC7111BIM5/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 LMC7111BIM5/NOPB part is unused and in its original packaging.
Return procedure for LMC7111BIM5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMC7111BIM5/NOPB Tags
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