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Texas Instruments LMC7111BIM5
- Part No.:
- LMC7111BIM5
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMC7111BIM5.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,976
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Product details
Overview
LMC7111BIM5 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 5V, 25 µA typical supply current, and ±0.9 mV input offset voltage - enabling precision low-power signal conditioning in space-constrained battery-powered systems such as portable medical sensors and GaAs RF bias circuits.
For engineers reviewing the LMC7111BIM5 datasheet, LMC7111BIM5 pinout, LMC7111BIM5 application, or LMC7111BIM5 equivalent, key selection criteria include its 20 mV rail-to-rail output swing at 100 kΩ load, ultra-low input bias current (±0.1 pA), wide 2.5–11 V supply range, and verified capacitive load drive up to 300 pF - all critical for reference buffering, current sensing, and sensor interface designs where board area and quiescent power are constrained.
Technical Context
The LMC7111BIM5 employs a CMOS input stage with >10 TΩ input resistance and 3 pF input capacitance, enabling high-impedance sensor interfacing without significant loading. Its rail-to-rail input extends to within 0.1 V of V− and beyond V+ (to +2.8 V at 2.7 V supply), supporting battery-monitoring circuits that sense voltages exceeding the positive rail.
Internally compensated for unity-gain stability, it achieves 50 kHz GBW and 0.027 V/µs slew rate at 5 V, with phase margin ≥50° into 100 pF loads when resistively isolated. Output stage delivers ±7 mA short-circuit current and swings to within 20 mV of either rail under light load - essential for driving MOSFET gates or ADC reference inputs directly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5 V to 11 V - supports single-cell Li-ion (3.0–4.2 V), dual-cell alkaline (3.0 V), and 10 V industrial rails without level-shifting. |
| Quiescent Current | 25 µA typical at 5 V - enables multi-year operation on coin-cell batteries in always-on sensor nodes. |
| Gain-Bandwidth Product | 50 kHz at 5 V - sufficient for DC–10 kHz signal conditioning in ECG front-ends and thermistor amplifiers. |
| Input Offset Voltage | ±0.9 mV max at 25°C - ensures <0.1% error in 1 V full-scale current-sense applications with 100 Ω shunt. |
| Rail-to-Rail Output Swing | Within 20 mV of V+ or V− at 100 kΩ load - allows direct interface to 1.8 V logic or ADC reference pins without external level shifters. |
| Input Bias Current | ±0.1 pA typical - preserves accuracy in high-Z pH electrode or photodiode transimpedance amplifiers. |
| Common-Mode Input Range | Extends 0.1 V beyond V− and to V+ − 0.1 V at 5 V - enables high-side current sensing above supply rail using simple resistor dividers. |
Pinout & Package
SOT-23-5 (DBV) package: 2.9 mm × 2.8 mm footprint, 1.43 mm height, surface-mount, RoHS-compliant tin (Sn) lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output node - drives loads up to 100 kΩ with 20 mV rail compliance; requires series resistor for >300 pF capacitive loads. |
| 2 | V+ | Positive supply connection - accepts 2.5–11 V; decoupling capacitor (100 nF) required within 5 mm for stability. |
| 3 | +IN | Noninverting input - high-impedance CMOS node (>10 TΩ); sensitive to PCB leakage; guard ring recommended. |
| 4 | −IN | Inverting input - matched to +IN for offset minimization; used in transimpedance or difference amplifier configurations. |
| 5 | V− | Negative supply (ground in single-supply) - return path for input bias current and output sink current. |
Key Features
| Feature | Design Value |
|---|---|
| Tiny SOT-23-5 footprint | 2.9 mm × 2.8 mm area - enables placement adjacent to sensors or ADCs, reducing noise pickup and trace inductance. |
| Rail-to-rail input & output | Operates with inputs from V− −0.1 V to V+ +0.1 V and outputs within 20 mV of rails - eliminates need for dual supplies in portable systems. |
| Ultra-low input bias current | ±0.1 pA typical - prevents voltage error across high-value feedback resistors (>10 MΩ) in precision integrators. |
| Capacitive load tolerance | Stable with ≤300 pF at unity gain (with resistive isolation) - suitable for driving multiplexer inputs and ADC sample-hold capacitors. |
| Wide supply voltage range | Specified from 2.7 V to 10 V - accommodates aging battery discharge curves without recalibration in handheld instruments. |
Applications
| Battery Voltage Monitoring | ADC Reference Buffering |
|---|---|
|
Use Scenario: Monitoring Li-ion cell voltage during charge/discharge cycles in wearables, where supply rails drop from 4.2 V to 2.7 V. IC Role / Device Role / Timing Role: Single-supply op-amp configured as unity-gain buffer, accepting input up to 4.5 V while powered from 3.3 V rail. Use Value: Input common-mode range extends beyond V+, enabling direct high-side sensing without resistor dividers or level shifters - reducing BOM count and voltage error. |
Use Scenario: Isolating and driving the reference input of a 16-bit SAR ADC in a portable data logger. IC Role / Device Role / Timing Role: Low-noise, low-drift buffer between precision voltage reference (e.g., LM4040) and ADC REF pin. Use Value: 25 µA quiescent current minimizes reference loading error; rail-to-rail output ensures full 0–VREF swing without headroom loss - preserving ADC ENOB. |
| Current Sensing in Chargers | GaAs RF Amplifier Bias |
|
Use Scenario: Measuring charge current in USB-C PD battery chargers using a 10 mΩ shunt resistor. IC Role / Device Role / Timing Role: High-side current sense amplifier with gain = 100 V/V, operating from 5 V supply. Use Value: Input offset voltage ≤ ±0.9 mV limits current measurement error to <1% at 1 A; rail-to-rail output interfaces directly to MCU ADC. |
Use Scenario: Providing stable negative gate bias to GaAs FETs in 5G mmWave front-end modules. IC Role / Device Role / Timing Role: Precision voltage source generating –1.2 V from 3.3 V rail, driving low-capacitance gate nodes. Use Value: 3 pF input capacitance and 300 pF capacitive load drive ensure stable bias without oscillation; tiny SOT-23 fits near RF ICs on dense RF PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC6462IMX | Dual-channel, 55 kHz GBW, ±0.25 mV max VOS, 50 pA IB - higher channel density but larger SOIC-8 package (4.9 × 6.0 mm). | Preferred for dual-sensor systems requiring matched pair performance; not suitable for ultra-small footprints. | Select LMC6462IMX when two matched amplifiers are needed and board area permits SOIC-8; choose LMC7111BIM5 for single-channel, space-critical placements. |
| LMC7101IM5X | Higher-speed variant: 150 kHz GBW, 0.08 V/µs SR, same SOT-23-5 package and 25 µA IQ - optimized for faster settling in dynamic references. | Better suited for ADCs with dynamic reference loads (e.g., sigma-delta modulators) requiring faster transient response. | Choose LMC7101IM5X when reference load current varies significantly during conversion; retain LMC7111BIM5 for static-reference buffering with lowest power. |
Compared with LMC6462IMX and LMC7101IM5X, the LMC7111BIM5 uniquely balances ultra-low power (25 µA), rail-to-rail operation, and minimal 2.9 mm × 2.8 mm footprint - making it optimal for single-channel, battery-sensitive applications where size and quiescent current outweigh speed or multi-channel needs.
Availability
LMC7111BIM5 is available at Aetrix Electronics and suitable for portable computing, mobile communications, and current-sensing battery charger designs requiring stable component supply across long production lifecycles.
Supply support for LMC7111BIM5 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 specializing in analog and embedded processing technologies, with over 50 years of leadership in precision op-amps and low-power signal chain solutions.
The LMC7111BIM5 belongs to TI's LMC71xx micropower op-amp family, designed specifically for space- and energy-constrained applications including portable instrumentation, sensor signal conditioning, and battery management systems.
FAQ
What is the maximum supply voltage for the LMC7111BIM5?
The LMC7111BIM5 has an absolute maximum supply voltage (VS = V+ − V−) of 11 V, with recommended operation from 2.5 V to 11 V. Operation beyond 11 V risks permanent damage per Absolute Maximum Ratings. At 10 V supply, it delivers 9.98 V output swing into 100 kΩ, confirming robust high-voltage capability within spec.
Does the LMC7111BIM5 support rail-to-rail input at 3.3 V supply?
Yes - at 3.3 V supply, the LMC7111BIM5 input common-mode range extends to 3.4 V (beyond V+) and down to –0.25 V (below V−), meeting rail-to-rail input specification with CMRR ≥ 47 dB. This is confirmed in Section 5.5 of the datasheet for V+ = 3.3 V conditions.
Can the LMC7111BIM5 drive a 1000 pF capacitive load?
No - the LMC7111BIM5 is stable up to 300 pF at unity gain with resistive isolation. Driving 1000 pF directly causes oscillation due to phase margin degradation. For >300 pF loads, use a 10–100 Ω series resistor between OUT and the capacitive node, as shown in Figure 7-1 of the datasheet.
What is the input bias current specification for LMC7111BIM5 over temperature?
The LMC7111BIM5 input bias current is ±0.1 pA typical at 25°C and ±20 pA maximum over –40°C to +85°C. This ultra-low value is enabled by its CMOS input stage and remains stable across the full operating range, critical for high-impedance sensor interfaces.
Is the LMC7111BIM5 pin-compatible with other SOT-23 op-amps like the TLV2461?
No - the LMC7111BIM5 uses standard SOT-23-5 pinout (OUT, V+, +IN, −IN, V−), but TLV2461 follows different pin assignment (V+, OUT, −IN, +IN, V−). Physical compatibility does not imply functional or pinout compatibility; PCB layout must match LMC7111BIM5's DBV pin mapping exactly.
LMC7111BIM5 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 FAQ
1.How can I place an order for LMC7111BIM5 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC7111BIM5 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 reliable?
The price and inventory of LMC7111BIM5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC7111BIM5 is usually 5 days.
3.What payment methods are accepted for LMC7111BIM5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC7111BIM5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC7111BIM5?
LMC7111BIM5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC7111BIM5 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?
For technical support, including LMC7111BIM5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC7111BIM5 requirements.
6.How does Aetrix verify that LMC7111BIM5 is sourced from the original manufacturer or authorized distributors?
All LMC7111BIM5 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 meets industry standards.
7.What is the process for return or replacement of LMC7111BIM5?
All LMC7111BIM5 units undergo pre-shipment inspection (PSI). If there is an issue with LMC7111BIM5, 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 part is unused and in its original packaging.
Return procedure for LMC7111BIM5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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