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Texas Instruments LMC6041AIM
- Part No.:
- LMC6041AIM
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC6041AIM.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:155
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Product details
Overview
LMC6041AIM 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 output swing within 30 mV of both rails at 5V supply - enabling precision signal conditioning in battery-powered pH probes, photodiode preamplifiers, and piezoelectric charge amplifiers.
For engineers reviewing the LMC6041AIM datasheet, LMC6041AIM pinout, LMC6041AIM application, or LMC6041AIM equivalent, key selection criteria include confirmed 2 fA input bias current, verified rail-to-rail output swing under 25 kΩ load, documented −40°C to +85°C operating range, and SOIC-8 package compatibility with standard PCB footprints for low-leakage analog front-ends.
Technical Context
The LMC6041AIM uses TI's double-poly silicon-gate CMOS process to achieve ultra-low input leakage while maintaining insensitivity to latch-up and stable unity-gain operation. Its input common-mode range includes ground, and its output stage drives to both supply rails without external pulldown resistors - critical for single-supply sensor interfaces.
It features a 75 kHz gain-bandwidth product, 0.015 V/µs slew rate (typ), and >10 TΩ input resistance. The device supports stable operation with capacitive loads up to 1 nF when compensated with external pullup or feedback networks, as validated in TI's application notes SNOS611F Section 6.1.3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input bias current | 2 fA typical - enables femtoamp-level current measurement in photodiode and ion-selective electrode circuits without significant error. |
| Supply current | 14–20 µA at 5V - allows multi-year battery life in portable analyzers and smoke detectors with minimal quiescent power overhead. |
| Rail-to-rail output | Swings to within 30 mV of V− and 13 mV of V+ at 5V/100 kΩ - maximizes dynamic range in single-supply systems with limited headroom. |
| Input common-mode range | Includes ground (0 V) and extends to (V+) − 2.3 V - supports direct interfacing with grounded sensors like pH electrodes and transducers. |
| Gain-bandwidth product | 75 kHz - sufficient for DC–10 kHz signal conditioning in instrumentation amplifiers and charge amplifiers without stability compromise. |
| Open-loop gain | 300–1000 V/mV - ensures <100 µV error in unity-gain buffer configurations with high-impedance sources. |
| CMRR | 68–75 dB (25°C) - maintains accuracy in noisy industrial environments where common-mode interference exceeds 100 mV. |
Pinout & Package
LMC6041AIM is housed in an 8-pin SOIC (D package) with industry-standard footprint. Pin 1 and Pin 5 are no-connect (NC); all NC pins must remain unconnected or floated to avoid parasitic coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 2 (−IN) | Inverting input | High-impedance node accepting differential signals; guard ring routing required to preserve 2 fA input bias spec. |
| Pin 3 (+IN) | Noninverting input | Reference input for follower/buffer configurations; must be guarded identically to −IN to prevent surface leakage. |
| Pin 4 (V−) | Negative supply | Ground reference in single-supply operation; connects directly to system GND plane with low-inductance path. |
| Pin 6 (OUT) | Amplifier output | Capable of sourcing/sinking ≥16 mA; rail-to-rail swing enables full utilization of ADC input range. |
| Pin 7 (V+) | Positive supply | Accepts 4.5V–15V; decoupling capacitor (0.1 µF ceramic) required within 5 mm of this pin for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 2 fA typical - preserves signal integrity in femtoamp-level current sources (e.g., photodiodes, ISFETs) without calibration drift. |
| Rail-to-rail output with ground-swing capability | Outputs down to 4 mV above V− at 5V/100 kΩ - eliminates need for negative rail in pH probe buffers and single-supply transducer interfaces. |
| Single-supply operation from 4.5V | Operates from coin-cell (3V) with boost or standard alkaline (6V–9V) - reduces bill-of-materials vs dual-supply alternatives. |
| Insensitivity to latch-up | CMOS process prevents destructive latch-up under overvoltage or ESD stress - improves field reliability in unregulated sensor nodes. |
| High input impedance | >10 TΩ - minimizes loading error on high-Z sources such as glass pH electrodes (100 MΩ–1 GΩ) and piezoelectric elements. |
Applications
| pH-Probe Buffer Amplifier | Photodiode Preamplifier |
|---|---|
|
Use Scenario: High-impedance pH electrode (≥1 GΩ) outputs mV-level signals in portable water quality meters. IC Role / Device Role / Timing Role: Unity-gain voltage follower isolating electrode from ADC input while preserving signal fidelity. Use Value: 2 fA input bias current prevents electrode polarization drift; rail-to-rail output ensures full 0–5V ADC range utilization. |
Use Scenario: Low-light detection in handheld spectrophotometers using reverse-biased silicon photodiodes. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photocurrent (100 fA–10 nA) to measurable voltage. Use Value: Ultra-high input resistance (>10 TΩ) avoids signal attenuation; low noise (83 nV/√Hz) maintains SNR at sub-nA levels. |
| Piezoelectric Charge Amplifier | Battery Voltage Monitor |
|
Use Scenario: Shock/vibration sensing in predictive maintenance edge nodes using ceramic piezoelectric transducers. IC Role / Device Role / Timing Role: Integrator-based charge amplifier converting high-impedance charge pulses into stable voltage steps. Use Value: Input bias current ≤2 fA prevents integrator drift over seconds-scale measurement windows; low IQ extends battery life. |
Use Scenario: Long-term state-of-charge tracking in lithium-thionyl chloride primary battery systems (10+ year life). IC Role / Device Role / Timing Role: Precision resistor-divider buffer feeding ADC, rejecting supply ripple and temperature drift. Use Value: 1.3 µV/°C offset drift minimizes calibration frequency; 14 µA supply current adds negligible load to aging cells. |
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 offset, but 50 µA IQ and 1.5 µV/°C drift. | Better DC accuracy, higher power - suited for lab-grade instruments, not ultra-long-life battery systems. | Choose LMC6041AIM when <20 µA supply current and femtoamp input bias are mandatory; LTC1050 when microvolt-level offset dominates design. |
| OPA348AIDBVR | CMOS; 0.5 pA input bias (500× higher than LMC6041AIM), 45 µA IQ, 1 MHz GBW. | Higher speed and drive strength, but insufficient for fA-level current measurement or decade-long battery operation. | Choose LMC6041AIM for photodiode/pH applications demanding true femtoamp bias; OPA348 for general-purpose low-power signal chains above 100 kHz. |
Compared with LTC1050CS8#PBF and OPA348AIDBVR, the LMC6041AIM uniquely balances femtoamp input bias, sub-20 µA quiescent current, and rail-to-rail output - making it irreplaceable in ultra-low-leakage, multi-year battery-powered sensor front-ends where offset drift and power budget are co-constrained.
Availability
LMC6041AIM is available at Aetrix Electronics and suitable for pH-probe buffering, photodiode preamplification, and piezoelectric charge amplification requiring stable component supply across extended production lifecycles.
Supply support for LMC6041AIM 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 and embedded processing technologies, with decades of heritage in precision op-amps and low-power signal conditioning.
The LMC6041AIM belongs to TI's LMC604x micropower CMOS op-amp family, designed specifically for ultra-low-leakage, single-supply instrumentation in portable and battery-critical systems.
FAQ
What is the maximum operating temperature range for the LMC6041AIM?
The LMC6041AIM is specified for operation from −40°C to +85°C ambient temperature. Electrical characteristics including input offset voltage drift (1.3 µV/°C), input bias current (±4 pA max), and output swing are guaranteed across this full industrial temperature range - critical for deployment in outdoor environmental sensors and automotive cabin modules.
Does the LMC6041AIM require external pullup resistors for rail-to-rail output operation?
No, the LMC6041AIM does not require external pulldown or pullup resistors to achieve rail-to-rail output swing. Its CMOS output stage actively drives to within 30 mV of V− and 13 mV of V+ at 5V/100 kΩ, as confirmed in TI's SNOS611F datasheet Section 5.7. External resistors are only needed for specific capacitive-load compensation per Section 6.1.3.
Can the LMC6041AIM be used in a two-op-amp instrumentation amplifier topology?
Yes, the LMC6041AIM is explicitly recommended for two-op-amp instrumentation amplifiers in TI's SNOS611F datasheet Section 6.2.1. Its ultra-high input impedance (>10 TΩ), low input bias current (2 fA), and rail-to-rail output enable sub-20 µA total quiescent current while maintaining >80 dB CMRR - ideal for portable medical and analytical instruments.
What is the absolute maximum supply voltage rating for the LMC6041AIM?
The absolute maximum supply voltage (V+ − V−) for the LMC6041AIM is 16 V, per Section 5.1 of SNOS611F. Operation beyond this risks permanent damage. For reliable long-term use, TI recommends staying within the recommended operating range of 4.5 V to 15.5 V - validated for performance and lifetime across temperature.
How does the LMC6041AIM handle capacitive loads in sensor interface circuits?
The LMC6041AIM remains stable with capacitive loads up to 1 nF when compensated using TI-recommended techniques: adding a series resistor (e.g., 20 Ω) between output and load, or using a pullup resistor to V+ (Section 6.1.3, Figure 6-3). Uncompensated direct capacitive loading degrades phase margin and causes ringing - verified in Figure 5-25 of SNOS611F.
LMC6041AIM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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
LMC6041AIM FAQ
1.How can I place an order for LMC6041AIM through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6041AIM 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 LMC6041AIM reliable?
The price and inventory of LMC6041AIM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6041AIM is usually 5 days.
3.What payment methods are accepted for LMC6041AIM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6041AIM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6041AIM?
LMC6041AIM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6041AIM 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 LMC6041AIM?
For technical support, including LMC6041AIM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6041AIM requirements.
6.How does Aetrix verify that LMC6041AIM is sourced from the original manufacturer or authorized distributors?
All LMC6041AIM 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 LMC6041AIM meets industry standards.
7.What is the process for return or replacement of LMC6041AIM?
All LMC6041AIM units undergo pre-shipment inspection (PSI). If there is an issue with LMC6041AIM, 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 LMC6041AIM part is unused and in its original packaging.
Return procedure for LMC6041AIM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMC6041AIM Tags
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