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Texas Instruments LMC6042AIM
- Part No.:
- LMC6042AIM
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC6042AIM.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,263
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Product details
Overview
LMC6042AIM from Texas Instruments is a CMOS dual micropower operational amplifier optimized for ultra-low-power, high-impedance signal conditioning. It delivers 10 μA/amp supply current (typ), 2 fA input bias current (typ), rail-to-rail output swing, and operates from 4.5 V to 15 V single supply - enabling use in battery-powered pH probe buffers and photodiode preamplifiers.
For engineers reviewing the LMC6042AIM datasheet, LMC6042AIM pinout, LMC6042AIM application, or LMC6042AIM equivalent, key selection criteria include guaranteed −40°C to +85°C operation, input common-mode range including ground, ultra-low leakage design, and SOIC-8 packaging with RoHS-compliant lead finish.
Technical Context
The LMC6042AIM uses TI's Double-Poly Silicon-Gate CMOS process to achieve sub-femtoamp input bias current and rail-to-rail output without external pull-down resistors. Its internal integrator-based output stage enables stable rail-to-rail swing under load while maintaining low output impedance and high open-loop gain.
It features feed-forward compensation for wide operating condition stability, supports single-supply operation with input voltage range extending to ground, and exhibits 75 dB typical CMRR and PSRR at 25°C - critical for precision DC-coupled sensor interfaces in portable instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 20 μA (both amps, typ) - enables multi-year battery life in handheld analyzers |
| Input Bias Current | 2 fA (typ) - preserves signal integrity in picoamp-level transducer circuits |
| Rail-to-Rail Output | Swings within 13 mV of V− and 30 mV of V+ at V+ = 5 V - maximizes dynamic range in single-supply systems |
| Input Common-Mode Range | Includes ground (−0.1 V min) - allows direct interfacing with grounded sensors like pH electrodes |
| Gain-Bandwidth Product | 100 kHz - sufficient for DC–10 kHz sensor signal conditioning with stable unity-gain configuration |
| Input Offset Voltage | 1 mV (typ), 3 mV (max) - supports accurate low-gain amplification without trimming in portable instruments |
| Slew Rate | 0.02 V/μs (typ) - adequate for slow-varying biosensor or environmental monitoring signals |
Pinout & Package
LMC6042AIM is housed in an 8-pin SOIC package (Package Drawing D), 3.91 mm × 4.90 mm footprint, 1.75 mm max height, RoHS-compliant matte tin (SN) lead finish, JEDEC MS-012 AA compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amp A) | High-impedance node requiring guard ring layout to preserve 2 fA bias current spec |
| 2 | Non-Inverting Input (Amp A) | Accepts signals down to ground; enables single-supply transducer biasing |
| 3 | Output (Amp A) | Rail-to-rail capable; drives 100 kΩ load to within 13 mV of rails at V+ = 5 V |
| 4 | V− (Ground for single supply) | Reference for both amplifiers; input common-mode extends to this pin |
| 5 | Non-Inverting Input (Amp B) | Independent high-Z input; usable for differential sensing or reference buffering |
| 6 | Inverting Input (Amp B) | Matches Amp A electrical specs; supports matched dual-channel topologies |
| 7 | Output (Amp B) | Electrically identical to Pin 3; enables dual-sensor readout or I/V + buffer stages |
| 8 | V+ | Single-supply rail (4.5–15 V); powers both amplifiers; thermal derating required above 85°C ambient |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 2 fA typical enables >1 TΩ effective source impedance handling without error |
| Rail-to-rail output swing | Eliminates need for external pull-down resistors in single-supply battery systems |
| Input common-mode range includes ground | Allows direct connection of grounded electrochemical sensors (e.g., pH probes) |
| Stable with capacitive loads | Supports direct driving of ADC input capacitance or long cables via simple RC compensation |
| Low quiescent power | 20 μA total supply current permits integration into always-on sensor nodes |
Applications
| Battery-Powered pH Probe Buffer | Photodiode Preamplifier |
|---|---|
Use Scenario: Signal conditioning for glass-electrode pH sensors in handheld field meters, operating from coin-cell batteries. IC Role / Device Role / Timing Role: High-impedance voltage follower and level-shifter, preserving microvolt-level electrode potential with minimal loading. Use Value: 2 fA input bias prevents drift and offset errors in high-resistance pH electrode circuits, extending calibration interval and measurement accuracy. | Use Scenario: Converting weak photocurrent from silicon photodiodes in smoke detectors or spectrophotometers. IC Role / Device Role / Timing Role: Transimpedance amplifier front-end with ultra-low input current to minimize dark-current-induced noise. Use Value: Sub-femtoamp bias current ensures full utilization of photodiode dynamic range without signal corruption from input leakage. |
| Silicon Transducer Interface | Fire/Smoke Detection System |
Use Scenario: Amplifying millivolt outputs from piezoresistive pressure or strain gauges in portable medical devices. IC Role / Device Role / Timing Role: Precision instrumentation amplifier gain stage with matched dual op-amps on single die. Use Value: Matched input specs (VOS, TC, IB) between channels enable high-CMRR two-op-amp architectures consuming <20 μA total. | Use Scenario: Low-power analog front-end for ionization chamber or optical smoke sensors in battery-backed alarms. IC Role / Device Role / Timing Role: Ultra-low-power signal conditioner for microamp-level chamber currents during standby mode. Use Value: 10 μA/amp supply current allows continuous monitoring for >5 years on AA batteries while maintaining detection sensitivity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual micropower op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC6042IMX/NOPB | Same die, industrial-grade temperature range (−40°C to +85°C), identical electrical specs, same SOIC-8 package | No functional difference; differs only in screening/test grade (AI vs I suffix) | Select LMC6042IMX/NOPB if cost-sensitive industrial qualification suffices and AI-grade screening is unnecessary |
| LTC1050CS8#PBF | Chopper-stabilized, 0.5 μV/°C VOS drift, 120 μA supply current, 1.5 V/μs slew rate - higher power, lower offset, better drift | Better DC precision but incompatible with ultra-low-power battery lifetime targets | Choose LTC1050CS8#PBF only when sub-μV offset and <1 μV/°C drift outweigh 6× higher supply current |
Compared with LMC6042AIM, LMC6042IMX/NOPB offers identical performance at lower cost for non-AI-qualified designs, while LTC1050CS8#PBF trades 6× higher supply current for chopper-stabilized precision - making LMC6042AIM optimal for multi-year battery life with fA-level input integrity.
Availability
LMC6042AIM is available at Aetrix Electronics and suitable for battery monitoring, photodiode preamplification, and handheld analytic instrumentation requiring stable component supply across extended production lifecycles.
Supply support for LMC6042AIM 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 broad technical support.
The LMC6042AIM belongs to TI's precision micropower op-amp product line, designed specifically for ultra-low-power, high-impedance sensor interface applications in portable and battery-operated instrumentation.
FAQ
What is the maximum operating supply voltage for the LMC6042AIM?
The LMC6042AIM has an absolute maximum supply voltage of 16 V, with recommended operating range from 4.5 V to 15.5 V. At 15 V supply, output swing remains rail-to-rail (within 150 mV of rails at 25 kΩ load), and supply current increases to 56 μA (max). Exceeding 15.5 V risks permanent damage per Absolute Maximum Ratings.
Does the LMC6042AIM support true single-supply operation with input referenced to ground?
Yes, the LMC6042AIM supports true single-supply operation: its input common-mode voltage range includes ground (−0.1 V min at 25°C), and output swings to within 13 mV of V− (ground) at V+ = 5 V. This allows direct interfacing with grounded sensors such as pH electrodes or thermistors without level-shifting circuitry.
What is the guaranteed input bias current specification for LMC6042AIM over temperature?
The LMC6042AIM guarantees input bias current ≤4 pA (max) across the full operating temperature range of −40°C to +85°C. At 25°C, typical IB is 2 fA; the 4 pA limit reflects worst-case process and temperature variation - critical for ensuring >100 GΩ effective source impedance handling in high-precision transducer circuits.
Can the LMC6042AIM drive capacitive loads directly, and what is the recommended compensation method?
The LMC6042AIM is not unity-gain stable with direct capacitive loads >100 pF. For loads up to 1 nF, TI recommends adding a series resistor (R1) and capacitor (C1) in the feedback path (Figure 30) or using a pull-up resistor to V+ (Figure 31). A 100 kΩ pull-up improves settling time and phase margin without degrading LMC6042AIM output swing or open-loop gain significantly.
Is the LMC6042AIM pin-compatible with other members of the LMC604x family?
Yes, the LMC6042AIM is pin-compatible with all LMC604x dual op-amps in SOIC-8 (D) package, including LMC6042IMX/NOPB and LMC6042AIMX/NOPB. Pinout, footprint, and electrical interface are identical; differences lie only in temperature grade (AI vs I), screening, and packaging (tube vs tape-and-reel). No PCB changes are required when substituting within the same package variant.
LMC6042AIM 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:
- CMOS
- Number of Circuits:
- 2
- Output Type:
- Push-Pull, Rail-to-Rail
- Slew Rate:
- 0.02V/µs
- Gain Bandwidth Product:
- 100 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.002 pA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 26µA (x2 Channels)
- 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 (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LMC6042AIM FAQ
1.How can I place an order for LMC6042AIM through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6042AIM 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 LMC6042AIM reliable?
The price and inventory of LMC6042AIM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6042AIM is usually 5 days.
3.What payment methods are accepted for LMC6042AIM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6042AIM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6042AIM?
LMC6042AIM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6042AIM 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 LMC6042AIM?
For technical support, including LMC6042AIM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6042AIM requirements.
6.How does Aetrix verify that LMC6042AIM is sourced from the original manufacturer or authorized distributors?
All LMC6042AIM 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 LMC6042AIM meets industry standards.
7.What is the process for return or replacement of LMC6042AIM?
All LMC6042AIM units undergo pre-shipment inspection (PSI). If there is an issue with LMC6042AIM, 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 LMC6042AIM part is unused and in its original packaging.
Return procedure for LMC6042AIM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMC6042AIM Tags
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LM358DT
STMicroelectronics
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LM358DR
Texas Instruments
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LM2904DR
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LM358ADR
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LM2904DGKR
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MCP6006T-E/OT
Microchip Technology
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MCP6006UT-E/OT
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LM324PWR
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LM2902DR
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LM358P
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