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Texas Instruments LMC6041IMX
- Part No.:
- LMC6041IMX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC6041IMX.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
LMC6041IMX from Texas Instruments is a single-channel, CMOS micropower operational amplifier optimized for ultra-low-input-current, rail-to-rail output applications in battery-powered systems. It delivers 2 fA typical input bias current, 10 µA supply current per amplifier, and operates from 4.5 V to 15 V single supply - enabling precision signal conditioning in pH-probe buffers and photodiode preamplifiers.
For engineers reviewing the LMC6041IMX datasheet, LMC6041IMX pinout, LMC6041IMX application, or LMC6041IMX equivalent, this page provides verified specifications, SOIC-8 package details, real-world use cases in portable instrumentation, and validated alternative options for low-leakage, single-supply op-amp selection.
Technical Context
The LMC6041IMX employs TI's double-poly silicon-gate CMOS process to achieve ultra-low input leakage while maintaining rail-to-rail output swing and ground-sensing input common-mode range. Its architecture supports stable operation with capacitive loads up to 1 nF when compensated with external pull-up resistors or feedback networks.
It features internal compensation for wide supply voltage (4.5–15 V) and temperature (–40°C to +85°C) ranges, with guaranteed open-loop gain ≥200 V/mV and CMRR ≥66 dB across operating conditions - making it suitable for high-impedance sensor interfaces where offset drift and noise must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 14–26 µA at 5 V (typical 20 µA); enables multi-year battery life in portable analyzers. |
| Input Bias Current | ±2 fA typical (±4 pA max over temp); preserves signal integrity in picoamp-level transducer circuits. |
| Input Voltage Range | Includes ground (V–) to (V+) – 2.3 V; supports direct interfacing with grounded sensors like pH electrodes. |
| Output Swing | Rail-to-rail: 0.004–4.987 V at 5 V supply (100 kΩ load); maximizes dynamic range in low-voltage systems. |
| Gain Bandwidth | 75 kHz; sufficient for DC–100 Hz sensor signals (e.g., smoke detection, piezoelectric charge amplification). |
| Input Impedance | >10 TΩ; eliminates loading error on high-Z sources such as silicon transducers and electret microphones. |
| CMRR | 66–75 dB (–40°C to +85°C); ensures stable DC gain in noisy industrial environments. |
Pinout & Package
LMC6041IMX is packaged in an 8-pin SOIC (D package), surface-mountable with standard reflow profiles. Thermal resistance RθJA = 165°C/W enables operation up to +85°C ambient without forced cooling.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NC | No connection; must remain unconnected or floating to avoid parasitic coupling. |
| 2 | –IN | Inverting input; high-impedance node requiring guard ring layout for sub-pA leakage control. |
| 3 | +IN | Noninverting input; accepts common-mode voltages down to ground for single-supply sensor biasing. |
| 4 | V– | Negative supply terminal; tied to ground in single-supply configurations (0 V reference). |
| 5 | NC | No connection; electrically isolated; no PCB trace or pad required. |
| 6 | OUT | Amplifier output; capable of sourcing/sinking ≥16 mA; rail-to-rail swing reduces need for level-shifting. |
| 7 | V+ | Positive supply terminal; supports 4.5–15 V operation; decoupling capacitor required near pin. |
| 8 | NC | No connection; leave unconnected; not internally bonded in SOIC-8 variant. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Enables full utilization of 5 V or 15 V supply rails without external level-shifting circuitry. |
| Ground-sensing input | Accepts input signals referenced to system ground - critical for pH probes and battery monitors. |
| Ultra-low input bias current | 2 fA typical minimizes voltage error across high-value feedback resistors (>1 GΩ) in charge amplifiers. |
| Single-supply operation | Operates from 4.5–15 V with no dual-rail requirement - simplifies power design in portable instruments. |
| Capacitive-load tolerance | Stable with ≥1 nF loads when using pull-up resistor or feedback capacitor compensation per TI guidelines. |
Applications
| Battery Monitoring | pH-Probe Buffer Amplifier |
|---|---|
|
Use Scenario: Real-time voltage tracking of Li-ion or alkaline cells in handheld medical devices. IC Role / Device Role / Timing Role: Precision buffer isolating high-impedance cell voltage from ADC input while rejecting supply ripple. Use Value: 2 fA input bias prevents self-discharge-induced measurement drift; 10 µA quiescent current extends device runtime. |
Use Scenario: Signal conditioning for glass-electrode pH sensors in portable water quality analyzers. IC Role / Device Role / Timing Role: Unity-gain follower preserving mV-level electrode potential without loading the fragile glass junction. Use Value: Input common-mode range including ground allows direct electrode biasing; rail-to-rail output drives 12-bit ADC full scale. |
| Photodiode Preamp | Piezoelectric Charge Amplifier |
|
Use Scenario: Low-noise amplification of weak photocurrents from IR detectors in fire-alarm optical chambers. IC Role / Device Role / Timing Role: Transimpedance amplifier converting pA-level diode current to measurable voltage with minimal added noise. Use Value: 83 nV/√Hz input voltage noise and 12.5 fA/√Hz current noise optimize SNR for low-light detection. |
Use Scenario: Integrating charge output from vibration-sensing piezoelectric elements in structural health monitors. IC Role / Device Role / Timing Role: High-impedance integrator with guarded input nodes to prevent charge leakage during long time constants. Use Value: >10 TΩ input resistance ensures <0.1% signal loss over 10-second integration windows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar micropower, low-input-current operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1050CS8#PBF | Chopper-stabilized; 0.5 µV/°C offset drift vs. LMC6041IMX's 1.3 µV/°C; higher 50 µA supply current. | Better DC accuracy in low-frequency (<1 Hz) thermocouple amps; less suited for high-Z AC-coupled photodiode apps due to chopper noise. | Select LTC1050 when ultra-low offset drift dominates over power and input current specs. |
| OPA344UA | CMOS rail-to-rail; 0.5 pA input bias (500× higher than LMC6041IMX); 80 µA supply current; 1 MHz GBW. | Higher speed suits faster sensor interfaces (e.g., gas detectors), but insufficient for femtoamp-level piezo or pH applications. | Choose OPA344UA only when bandwidth >100 kHz is required and input leakage ≤0.5 pA is acceptable. |
Compared with LTC1050CS8#PBF and OPA344UA, the LMC6041IMX uniquely balances femtoamp input bias, micropower consumption, and rail-to-rail output in a cost-effective SOIC-8 package - making it irreplaceable for battery-operated, ultra-high-impedance analog front-ends where leakage and quiescent current are primary constraints.
Availability
LMC6041IMX is available at Aetrix Electronics and suitable for battery monitoring, portable analytical instruments, and fire- and smoke-detection systems requiring stable component supply across extended production lifecycles.
Supply support for LMC6041IMX 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 and embedded processing solutions with emphasis on reliability, precision, and energy efficiency.
The LMC6041IMX belongs to TI's LMC604x micropower op-amp family, engineered specifically for ultra-low-leakage, single-supply signal conditioning in portable and remote sensing applications.
FAQ
What is the maximum supply voltage for LMC6041IMX?
The absolute maximum supply voltage for LMC6041IMX is 16 V, but the recommended operating range is 4.5 V to 15 V for reliable performance. Operation above 15 V risks exceeding junction temperature limits and degrading long-term reliability, especially at elevated ambient temperatures.
Does LMC6041IMX support true rail-to-rail input?
No - LMC6041IMX supports rail-to-rail *output* swing and input common-mode range that *includes ground*, but its positive input limit is (V+) – 2.3 V (typical). This allows ground-referenced inputs but does not extend fully to the positive rail, distinguishing it from full rail-to-rail input op-amps.
Can LMC6041IMX drive a 1000 pF capacitive load directly?
Direct driving of 1000 pF loads may cause instability or ringing. TI recommends adding a pull-up resistor to V+ (≥10 µA current) or using feedback compensation (e.g., capacitor across Rf) to maintain phase margin - as validated in Figure 6-2 and Section 6.1.3 of the LMC6041IMX datasheet.
What is the typical input offset voltage for LMC6041IMX?
The typical input offset voltage for LMC6041IMX is ±1 mV at 25°C, with a maximum of ±3.3 mV over the full –40°C to +85°C temperature range. The "AI" grade (LMC6041AIMX) offers tighter initial offset vs. the "I" grade (LMC6041IMX), which has ±6.3 mV max over temperature.
Is LMC6041IMX pin-compatible with other LMC604x variants?
No - LMC6041IMX (single-channel, 8-pin SOIC) is not pin-compatible with LMC6042 (dual, same 8-pin SOIC) or LMC6044 (quad, 14-pin SOIC). Pin functions differ significantly: LMC6041 uses pins 1,5,8 as NC, while LMC6042 assigns those pins to active channels (e.g., OUT A, ±IN B, +IN B).
LMC6041IMX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
LMC6041IMX FAQ
1.How can I place an order for LMC6041IMX through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6041IMX 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 LMC6041IMX reliable?
The price and inventory of LMC6041IMX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6041IMX is usually 5 days.
3.What payment methods are accepted for LMC6041IMX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6041IMX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6041IMX?
LMC6041IMX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6041IMX 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 LMC6041IMX?
For technical support, including LMC6041IMX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6041IMX requirements.
6.How does Aetrix verify that LMC6041IMX is sourced from the original manufacturer or authorized distributors?
All LMC6041IMX 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 LMC6041IMX meets industry standards.
7.What is the process for return or replacement of LMC6041IMX?
All LMC6041IMX units undergo pre-shipment inspection (PSI). If there is an issue with LMC6041IMX, 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 LMC6041IMX part is unused and in its original packaging.
Return procedure for LMC6041IMX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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