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Texas Instruments LMC7111AIN
- Part No.:
- LMC7111AIN
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LMC7111AIN.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,286
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Product details
Overview
LMC7111AIN from Texas Instruments is a micropower CMOS operational amplifier in a 5-pin SOT-23 package, featuring rail-to-rail input and output, 25 µA typical supply current at 5 V, 50 kHz gain-bandwidth, and output swing to within 20 mV of supply rails at 100 kΩ load - used for precision biasing and reference buffering in portable battery-powered systems.
For engineers reviewing the LMC7111AIN datasheet, LMC7111AIN pinout, LMC7111AIN application, or LMC7111AIN equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in mobile and sensor systems, and two confirmed alternative op-amps with documented technical and application differences.
Technical Context
The LMC7111AIN employs a CMOS input stage enabling picoampere-level input bias current (±0.1 pA typ) and >10 TΩ input resistance, supporting high-impedance sensor interfaces. Its rail-to-rail input extends common-mode range beyond both supply rails - up to –0.3 V below V– and +10.2 V above V– at 10 V supply - eliminating phase inversion under overvoltage conditions.
Output stage design achieves 20 mV rail-to-rail swing at light loads and sustains stable operation driving ≥300 pF capacitive loads without oscillation. Gain-bandwidth remains stable across 2.7 V to 10 V supply range, with PSRR ≥80 dB at 10 V and CMRR ≥85 dB over full common-mode range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5 V to 11 V - supports single-cell Li-ion, dual-cell alkaline, and regulated 3.3/5/10 V rails without level-shifting. |
| Quiescent Current | 25 µA typ 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-coupled signal conditioning, reference buffering, and low-frequency feedback loops. |
| Input Offset Voltage | ±0.9 mV max at 25°C - ensures <1 LSB error when buffering 12-bit ADC references (e.g., 2.5 V ref). |
| Output Swing | To within 20 mV of either rail at 100 kΩ - allows full-swing control of MOSFET gates or rail-referenced comparators. |
| Input Bias Current | ±0.1 pA typ - preserves signal integrity in photodiode, pH electrode, and high-Z transducer interfaces. |
| Common-Mode Range | Extends 0.3 V beyond V– and 0.2 V beyond V+ at 5 V - enables direct sensing of battery voltage above supply rail. |
Pinout & Package
SOT-23-5 (DBV) package: 2.9 mm × 2.8 mm footprint, 1.43 mm height, surface-mount, RoHS-compliant tin finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Amplifier output | Delivers rail-to-rail voltage with 20 mV margin at 100 kΩ; drives capacitive loads up to 300 pF stably. |
| 2 - V+ | Positive supply | Accepts 2.5–11 V; supplies internal bias and output stage; PSRR ≥80 dB at 10 V. |
| 3 - +IN | Noninverting input | CMOS input with ±0.1 pA bias current; common-mode range includes V– –0.3 V and V+ +0.2 V. |
| 4 - –IN | Inverting input | Matches +IN in impedance and offset; enables precision differential or transimpedance configurations. |
| 5 - V– | Negative supply | Ground or negative rail; supports single-supply (0 V) or split-supply (±2.5 V) operation. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full dynamic range utilization in low-voltage systems (e.g., 2.7 V battery), reducing need for external level shifters. |
| 25 µA quiescent current | Extends operating time in coin-cell–powered devices (e.g., >5 years at 1 µA average system current). |
| 300 pF capacitive load drive | Eliminates external isolation resistors when buffering ADC reference inputs or multiplexer channels. |
| Wide supply range (2.5–11 V) | Permits reuse across multiple platforms - from 3.3 V IoT sensors to 10 V industrial analog front-ends. |
| Input overvoltage tolerance | Operates safely with inputs 300 mV beyond rails, simplifying protection circuitry in battery-monitoring applications. |
Applications
| Mobile Communications | Portable Computing |
|---|---|
Use Scenario: Providing stable negative bias voltage to GaAs RF power amplifiers in cellular handsets. IC Role / Device Role / Timing Role: Precision DC bias generator with ultra-low quiescent current and rail-to-rail output swing. Use Value: Enables compact layout adjacent to RF ICs, minimizing parasitic inductance and improving bias stability over temperature. |
Use Scenario: Buffering voltage references for analog-to-digital converters in ultrabooks and tablets. IC Role / Device Role / Timing Role: Low-noise, low-drift reference follower isolating ADC reference input from digital noise coupling. Use Value: Maintains <0.01% reference accuracy under varying load conditions while consuming <25 µA. |
| Current Sensing | Sensor Interface |
Use Scenario: Amplifying shunt voltage in battery charger ICs for accurate charge/discharge current monitoring. IC Role / Device Role / Timing Role: High-input-impedance, low-offset current sense amplifier with rail-to-rail output. Use Value: Resolves sub-mA currents at 2.7 V supply with <10 µV offset contribution, improving Coulomb counting accuracy. |
Use Scenario: Conditioning output of high-impedance pH electrodes and photodiodes in handheld analyzers. IC Role / Device Role / Timing Role: Transimpedance or unity-gain buffer with pA-level input bias and >10 TΩ input resistance. Use Value: Prevents signal degradation from leakage paths, preserving measurement fidelity in sub-nA current ranges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC6462IMX/NOPB | Dual-channel, 1.2 µA per amplifier, 150 kHz GBW, higher supply current but lower offset (±0.25 mV max). | Better for multi-channel signal chains where channel count justifies shared packaging; not suitable for space-constrained single-channel designs. | Select LMC6462IMX/NOPB when dual amplifiers are needed and offset-critical; retain LMC7111AIN for ultra-low-power, single-channel, minimal-footprint use. |
| LMC7101AIM5X/NOPB | Single-channel, 85 µA IQ, 1.5 MHz GBW, faster slew rate (0.45 V/µs), wider supply range (1.8–16 V). | Required for higher-speed reference buffering (e.g., SAR ADCs) or dynamic load driving where LMC7111AIN's 50 kHz GBW is insufficient. | Choose LMC7101AIM5X/NOPB when bandwidth >100 kHz or slew rate >0.02 V/µs is required; LMC7111AIN remains optimal for micropower, low-speed precision. |
Compared with LMC6462IMX/NOPB and LMC7101AIM5X/NOPB, the LMC7111AIN uniquely balances ultra-low quiescent current (25 µA), rail-to-rail I/O, and SOT-23-5 size - making it irreplaceable in single-channel, battery-limited, space-constrained applications where speed is secondary to power and footprint.
Availability
LMC7111AIN is available at Aetrix Electronics and suitable for mobile communications, portable computing, and current sensing applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LMC7111AIN 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 company designing analog ICs, embedded processors, and system solutions for industrial, automotive, and personal electronics markets.
The LMC7111AIN belongs to TI's precision micropower op-amp family, engineered specifically for ultra-low-power, space-constrained signal conditioning in portable and battery-operated equipment.
FAQ
What is the maximum supply voltage for the LMC7111AIN?
The LMC7111AIN supports a maximum supply voltage of 11 V, as specified in its Absolute Maximum Ratings. Operation beyond this limit risks permanent damage. Recommended operating range is 2.5 V to 11 V, with full electrical characterization provided at 2.7 V, 5 V, and 10 V. The LMC7111AIN maintains rail-to-rail performance and stable quiescent current across this entire range.
Does the LMC7111AIN support rail-to-rail input at 2.7 V supply?
Yes, the LMC7111AIN supports rail-to-rail input operation at 2.7 V supply: its common-mode input range extends to –0.10 V below V– and 2.8 V above V– (i.e., to 2.8 V when V– = 0 V), satisfying CMRR ≥41 dB and ≥47 dB respectively. This enables accurate sensing of signals exceeding the positive supply - critical for battery voltage monitoring in low-voltage portable systems using the LMC7111AIN.
Can the LMC7111AIN drive a 100 kΩ load to within 20 mV of the supply rail?
Yes - the LMC7111AIN delivers output voltage swing to within 20 mV of both V+ and V– when driving a 100 kΩ load, as confirmed in Section 5.5 (VS = 2.7 V) and Section 5.6 (VS = 5 V) of the datasheet. At 5 V supply, VO is specified as 4.98–4.99 V (positive rail) and 0.01–0.02 V (negative rail) under these conditions. This capability is essential for fully turning on/off rail-referenced FETs or driving high-impedance ADC references with the LMC7111AIN.
What is the input bias current specification for the LMC7111AIN?
The LMC7111AIN features an input bias current of ±0.1 pA typical and ±1 pA maximum at 25°C, with ±20 pA maximum over –40°C to +85°C. This ultra-low value stems from its CMOS input stage and enables high-fidelity interfacing with photodiodes, pH electrodes, and other high-impedance sources without significant signal error. The LMC7111AIN's input bias current directly supports its role in precision sensor signal conditioning.
Is the LMC7111AIN pin-compatible with the LMC6462?
No - the LMC7111AIN is a single-channel amplifier in a 5-pin SOT-23 (DBV) package, whereas the LMC6462 is a dual-channel device in an 8-pin SOIC or MSOP package. They share functional similarity (micropower, rail-to-rail I/O) but differ in channel count, pin count, and package. Substituting LMC6462 for LMC7111AIN requires PCB redesign. The LMC7111AIN remains the only single-channel, 5-pin SOT-23 option in this performance class.
LMC7111AIN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LMC7111AIN FAQ
1.How can I place an order for LMC7111AIN through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC7111AIN 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 LMC7111AIN reliable?
The price and inventory of LMC7111AIN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC7111AIN is usually 5 days.
3.What payment methods are accepted for LMC7111AIN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC7111AIN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC7111AIN?
LMC7111AIN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC7111AIN 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 LMC7111AIN?
For technical support, including LMC7111AIN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC7111AIN requirements.
6.How does Aetrix verify that LMC7111AIN is sourced from the original manufacturer or authorized distributors?
All LMC7111AIN 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 LMC7111AIN meets industry standards.
7.What is the process for return or replacement of LMC7111AIN?
All LMC7111AIN units undergo pre-shipment inspection (PSI). If there is an issue with LMC7111AIN, 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 LMC7111AIN part is unused and in its original packaging.
Return procedure for LMC7111AIN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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