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Texas Instruments LMC6041IM
- Part No.:
- LMC6041IM
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC6041IM.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,826
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Product details
Overview
LMC6041IM from Texas Instruments is a single-channel, micropower CMOS operational amplifier optimized for ultra-low-input-current, rail-to-rail output, and single-supply operation (4.5V–15V). It delivers 2 fA typical input bias current, 10 µA supply current per amplifier, and rail-to-rail output swing - enabling precision signal conditioning in battery-powered pH probes, photodiode preamplifiers, and piezoelectric charge amplifiers.
For engineers reviewing the LMC6041IM datasheet, LMC6041IM pinout, LMC6041IM application, or LMC6041IM equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions for SOIC-8 packaging, application-specific implementation insights, and two confirmed alternative parts with documented functional and parametric differences.
Technical Context
The LMC6041IM uses TI's double-poly silicon-gate CMOS process to achieve ultra-low input leakage while maintaining rail-to-rail output drive without external pulldown resistors. Its input common-mode range includes ground, supporting true single-supply sensor interfacing.
It features internal compensation for stable operation with capacitive loads up to 1 nF when augmented with external pull-up or feedback networks, and its 75 kHz gain-bandwidth product and 0.015 V/µs slew rate are optimized for low-frequency, high-impedance signal chains - not high-speed applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 14–26 µA at 5V (typical 20 µA); enables multi-year battery life in portable instruments. |
| Input Bias Current | ±2 fA (typ), ≤ ±4 pA over –40°C to +85°C; preserves signal integrity in >1 TΩ source impedances (e.g., pH electrodes, piezoelectrics). |
| Input Voltage Range | Includes ground (V–) and extends to (V+) – 2.3 V; supports direct DC-coupled sensing from 0 V referenced transducers. |
| Output Swing | Rail-to-rail: 0.004–0.09 V above V– and 4.91–4.987 V below V+ at 5V supply; maximizes dynamic range in low-voltage systems. |
| Gain-Bandwidth Product | 75 kHz; sufficient for DC–10 kHz instrumentation signals (e.g., ECG, gas sensors) while minimizing noise and power. |
| Open-Loop Gain | 300–1000 V/mV (300k–1M V/V); ensures <1 mV error in unity-gain buffers driving 100 kΩ loads. |
| CMRR | 68–75 dB (typ); adequate for rejecting common-mode noise in low-frequency industrial sensor nodes. |
Pinout & Package
LMC6041IM is packaged in an 8-pin SOIC (D package), surface-mount, industry-standard outline with 1.27 mm pitch. Thermal resistance RθJA = 165°C/W (SOIC-8).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 8 | No Connection (NC) | Must remain unconnected; no internal bond or function - floating improves noise immunity. |
| 2 | Inverting Input (–IN) | High-impedance node (RIN >10 TΩ); guard ring required for sub-pA leakage in PCB layout. |
| 3 | Noninverting Input (+IN) | Same ultra-high impedance as –IN; used for reference or signal input in follower/buffer configurations. |
| 4 | Negative Supply (V–) | Ground reference in single-supply mode; must be connected directly to system GND plane. |
| 6 | Output (OUT) | Capable of sourcing/sinking ≥16 mA; rail-to-rail swing eliminates need for level-shifting in ADC front-ends. |
| 7 | Positive Supply (V+) | Accepts 4.5–15 V; decoupling capacitor (0.1 µF ceramic) required within 5 mm of pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Enables full utilization of ADC input range in 3.3V or 5V systems without external level-shifting circuitry. |
| Input common-mode includes ground | Permits direct connection of 0 V-referenced sensors (e.g., thermocouples, pH electrodes) without biasing networks. |
| Ultra-low 2 fA input bias current | Reduces voltage error across high-value feedback resistors (>100 MΩ), critical for charge amplifiers and electrometers. |
| Insensitivity to latch-up | Allows safe operation in noisy industrial environments with transient overvoltage on inputs or supplies. |
| Stable with capacitive loads | Supports direct driving of ADC input capacitance or long cables via simple RC compensation (e.g., 10 kΩ + 20 pF). |
Applications
| Battery-Powered pH Probe Buffer | Photodiode Preamp in Portable Analyzers |
|---|---|
Use Scenario: Signal conditioning for glass-electrode pH sensors in handheld field meters, operating from coin-cell batteries for >2 years. IC Role / Device Role / Timing Role: Unity-gain buffer isolating high-impedance electrode (≥100 MΩ) from downstream circuitry while preserving DC accuracy. Use Value: 2 fA input bias prevents drift >10 mV/hour; rail-to-rail output delivers full 0–5 V range to 12-bit SAR ADC. |
Use Scenario: Amplifying weak current from silicon photodiodes in portable blood-oxygen (SpO₂) or environmental CO₂ sensors. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with >1 GΩ feedback resistor, converting photocurrent to voltage with minimal offset error. Use Value: Ultra-low input current avoids signal loss across feedback network; 75 kHz GBW supports pulse oximetry sampling at 100 Hz. |
| Piezoelectric Charge Amplifier | Fire/Smoke Detector Sensor Interface |
Use Scenario: Converting charge output from vibration or impact sensors in structural health monitoring or industrial safety systems. IC Role / Device Role / Timing Role: Integrator-based charge amplifier with guarded input and low-leakage feedback capacitor (e.g., polypropylene). Use Value: Sub-fA leakage preserves charge integration accuracy over seconds-long time constants; single-supply operation simplifies power architecture. |
Use Scenario: Signal conditioning for ionization-chamber or optical smoke detectors in battery-backed residential alarms. IC Role / Device Role / Timing Role: Low-power comparator input stage or analog front-end amplifier for microamp-level chamber current detection. Use Value: 10 µA quiescent current extends 10-year battery life; rail-to-rail output interfaces directly with low-voltage microcontroller ADCs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower, low-input-current op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1050CS8#PBF | Chopper-stabilized (0.5 µV max VOS, 0.01 µV/°C drift); higher IQ (80 µA); 1.5 MHz GBW. | Better DC precision for zero-drift requirements; less suitable for >10 kHz signals due to chopper ripple. | Choose LTC1050 when offset drift dominates error budget; avoid if >100 kHz noise or EMI sensitivity is critical. |
| OPA344UA | CMOS input (0.5 pA IB), 1 MHz GBW, 250 µA IQ; rail-to-rail I/O; SOIC-8. | Higher speed and drive strength, but 25× higher supply current limits battery life in always-on sensors. | Choose OPA344 when bandwidth >100 kHz or output drive >20 mA is needed; not viable for multi-year coin-cell operation. |
Compared with LMC6041IM, LTC1050CS8#PBF trades ultra-low power for superior DC accuracy via chopper stabilization, while OPA344UA sacrifices micropower operation for higher bandwidth and output current - making LMC6041IM the optimal choice for long-life, high-impedance, sub-10 kHz sensor interfaces where leakage and supply current dominate design constraints.
Availability
LMC6041IM is available at Aetrix Electronics and suitable for battery monitoring, portable analytical instruments, and fire/smoke detection systems requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LMC6041IM 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and industrial-grade performance.
The LMC604x family was designed specifically for ultra-low-power, high-impedance analog signal conditioning in portable and remote sensor systems - prioritizing femtoamp input leakage, rail-to-rail operation, and single-supply compatibility over speed or output drive.
FAQ
What is the maximum supply voltage for LMC6041IM?
The absolute maximum supply voltage (V+ – V–) for LMC6041IM is 16 V. The recommended operating range is 4.5 V to 15.5 V for single-supply use. Exceeding 16 V risks permanent damage; operation above 15.5 V may degrade long-term reliability, especially at elevated temperatures.
Does LMC6041IM support dual-supply operation?
Yes, LMC6041IM supports dual-supply operation with V+ and V– rails set to ±2.25 V to ±7.75 V. Its input common-mode range includes ground, and output swings rail-to-rail - enabling symmetric signal handling in traditional op-amp configurations like inverting amplifiers with bipolar supplies.
Can LMC6041IM drive capacitive loads directly?
LMC6041IM can drive moderate capacitive loads (≤100 pF) stably without external compensation. For larger loads (e.g., 1 nF ADC inputs), TI recommends adding a series resistor (10–100 Ω) between the output and load, or using a pull-up resistor to V+ (e.g., 100 kΩ) to maintain phase margin and prevent ringing - as validated in Figure 6-2 and 6-3 of the datasheet.
What is the input impedance of LMC6041IM?
The LMC6041IM has a minimum input resistance of >10 TΩ (1013 Ω) and typical input bias current of ±2 fA at 25°C. This effective impedance remains >1 TΩ across –40°C to +85°C, making it suitable for interfacing with ultra-high-impedance sources such as pH electrodes, piezoelectric sensors, and electret microphones.
Is LMC6041IM pin-compatible with other LMC604x variants?
No - LMC6041IM (single-channel, SOIC-8) is not pin-compatible with LMC6042 (dual, SOIC-8) or LMC6044 (quad, SOIC-14). While all share identical pin functions per channel (e.g., Pin 2 = –IN), the LMC6041IM has unused pins (1, 5, 8) designated NC, whereas LMC6042 repurposes those pins for additional channels. PCB layout must match the exact variant.
LMC6041IM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.02V/µs
- Gain Bandwidth Product:
- 75 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.002 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 18µA
- Current - Output / Channel:
- 40 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 15.5 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LMC6041IM FAQ
1.How can I place an order for LMC6041IM through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6041IM 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 LMC6041IM reliable?
The price and inventory of LMC6041IM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6041IM is usually 5 days.
3.What payment methods are accepted for LMC6041IM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6041IM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6041IM?
LMC6041IM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6041IM 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 LMC6041IM?
For technical support, including LMC6041IM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6041IM requirements.
6.How does Aetrix verify that LMC6041IM is sourced from the original manufacturer or authorized distributors?
All LMC6041IM 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 LMC6041IM meets industry standards.
7.What is the process for return or replacement of LMC6041IM?
All LMC6041IM units undergo pre-shipment inspection (PSI). If there is an issue with LMC6041IM, 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 LMC6041IM part is unused and in its original packaging.
Return procedure for LMC6041IM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMC6041IM Tags
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