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Texas Instruments LMC6042IN/NOPB
- Part No.:
- LMC6042IN/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
LMC6042IN/NOPB.pdf
- Description:
- IC CMOS 2 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:150
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Product details
Overview
LMC6042IN/NOPB from Texas Instruments is a dual CMOS micropower operational amplifier optimized for ultra-low-power, high-impedance signal conditioning. It delivers 2 fA typical input bias current, 10 μA/amp supply current, rail-to-rail output swing (to both V+ and ground), and operates from 4.5V to 15V single supply - enabling precision battery-powered pH probe buffers and photodiode preamplifiers.
For engineers reviewing the LMC6042IN/NOPB datasheet, LMC6042IN/NOPB pinout, LMC6042IN/NOPB application, or LMC6042IN/NOPB equivalent, key selection criteria include verified 2 fA input leakage, guaranteed −40°C to +85°C operation, PDIP-8 package compatibility with legacy through-hole layouts, and confirmed suitability for transducer front-ends requiring sub-picoamp bias stability.
Technical Context
The LMC6042IN/NOPB uses TI's Double-Poly Silicon-Gate CMOS process to achieve ultra-low input current without compromising rail-to-rail output drive. Its output stage connects directly to the internal integrator - not a push-pull buffer - enabling low output impedance and stable large-signal response even under capacitive loads up to 100 pF when compensated.
It features input common-mode range extending to ground (−0.4 V min at V+ = 5 V), CMRR ≥62 dB over 0–12 V common-mode range, and PSRR >60 dB across supply variations - making it suitable for single-supply instrumentation where ground-referenced sensor signals must be amplified without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5 V to 15 V single supply - supports direct integration into 5 V and 12 V battery systems without regulation. |
| Input Bias Current | 2 fA typical - preserves signal integrity in high-impedance sources like pH electrodes and photodiodes. |
| Supply Current per Amplifier | 10 μA typical - enables multi-year operation on coin-cell batteries in portable analyzers. |
| Rail-to-Rail Output Swing | Swings within 13 mV of V+ and 4 mV of ground at V+ = 5 V, RL = 100 kΩ - maximizes dynamic range in low-voltage systems. |
| Input Common-Mode Range | Includes ground (−0.4 V min) - allows direct amplification of 0 V–reference transducer outputs without biasing networks. |
| Gain-Bandwidth Product | 100 kHz - sufficient for DC–10 kHz sensor signal conditioning (e.g., piezoelectric charge amplifiers, smoke detector analog front-ends). |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive cabin environments. |
Pinout & Package
LMC6042IN/NOPB is housed in an 8-pin plastic dual in-line package (PDIP) with 0.3-inch body width and standard through-hole footprint (JEDEC MS-001). Pin 1 is marked by a notch or dot; leads are tin-lead free (RoHS-compliant SN finish).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amplifier A) | High-impedance node accepting differential signal; requires guarding for <2 fA leakage integrity. |
| 2 | Non-Inverting Input (Amplifier A) | Ground-referenced or biased input; common-mode range includes 0 V for direct sensor interface. |
| 3 | Output (Amplifier A) | Rail-to-rail sourcing/sinking output; capable of ±13 mA (V+ = 5 V) into resistive loads. |
| 4 | V− (Ground / Negative Supply) | Reference return for single-supply operation; must be connected to system ground. |
| 5 | Non-Inverting Input (Amplifier B) | Independent second channel input; identical specs to Pin 2 - enables dual-channel sensor buffering. |
| 6 | Inverting Input (Amplifier B) | Second amplifier inverting node; supports independent feedback networks per channel. |
| 7 | Output (Amplifier B) | Second rail-to-rail output; isolated from Amp A - used in two-op-amp instrumentation topologies. |
| 8 | V+ (Positive Supply) | Single positive supply input; accepts 4.5–15 V; ESD protection rated to 500 V HBM. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 2 fA typical - enables femtoamp-level current measurement in electrometers and ion-selective electrode interfaces. |
| Rail-to-rail output with ground swing | Outputs down to 4 mV above ground at V+ = 5 V - eliminates need for negative supply in single-ended sensor readouts. |
| Input common-mode range including ground | Valid down to −0.4 V at V+ = 5 V - supports direct connection of grounded transducers (e.g., silicon pressure sensors). |
| Low quiescent power | 20 μA total for both amplifiers - extends battery life in handheld diagnostic tools and field-deployable gas detectors. |
| High CMRR and PSRR | ≥62 dB CMRR, ≥60 dB PSRR - rejects supply noise and common-mode interference in noisy industrial environments. |
Applications
| Photodiode Preamplifier | pH Probe Buffer |
|---|---|
Use Scenario: Amplifying weak current from reverse-biased photodiodes in infrared flame detection systems. IC Role / Device Role: Transimpedance amplifier with guarded input and ultra-low IB to preserve photocurrent fidelity. Use Value: 2 fA input bias prevents signal loss in high-Rf configurations; rail-to-rail output drives ADC reference rails directly. |
Use Scenario: Buffering high-impedance glass electrode output in portable water quality meters. IC Role / Device Role: Unity-gain voltage follower isolating electrode from load while maintaining DC accuracy. Use Value: Input common-mode range including ground enables zero-bias electrode interface; 10 μA/amp draw supports >5-year CR2032 operation. |
| Piezoelectric Charge Amplifier | Battery Monitoring Circuit |
Use Scenario: Converting high-impedance charge output from accelerometers or knock sensors into low-Z voltage. IC Role / Device Role: Integrator-based charge amplifier with low leakage feedback capacitor bias path. Use Value: 2 fA IB minimizes drift in long-time-constant integrators; rail-to-rail swing captures full dynamic range of low-voltage battery-powered systems. |
Use Scenario: Precision sensing of cell voltage and leakage current in multi-cell Li-ion battery packs. IC Role / Device Role: High-side current sense amplifier and voltage monitor with rail-to-rail input/output. Use Value: Operates from 4.5 V supply - compatible with fully discharged cells; 10 μA quiescent current avoids parasitic drain during sleep mode. |
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 |
|---|---|---|---|
| LMC6042IM/NOPB | Same die, SOIC-8 package (165°C/W θJA vs. PDIP's 101°C/W); RoHS-compliant SN finish. | Surface-mount layout; higher thermal resistance limits max ambient in sealed enclosures. | Select for automated assembly; verify board-level thermal margin if operating near 85°C. |
| TLV2462IDR | Higher supply current (550 μA/amp), 1 pA IB, 6.4 MHz GBW - trades micropower for speed and drive strength. | Suitable for active filters or higher-bandwidth sensor interfaces where >100 kHz response is required. | Choose only when LMC6042IN/NOPB's 100 kHz GBW is insufficient; avoid in battery-critical designs. |
Compared with LMC6042IM/NOPB, the LMC6042IN/NOPB offers lower thermal resistance and through-hole mechanical robustness but requires manual soldering; versus TLV2462IDR, it sacrifices bandwidth and output drive to achieve 55× lower supply current and 500× lower input bias - critical for femtoamp-level precision.
Availability
LMC6042IN/NOPB is available at Aetrix Electronics and suitable for battery monitoring, photodiode preamplification, and pH probe buffering requiring stable component supply across industrial, medical, and environmental instrumentation programs.
Supply support for LMC6042IN/NOPB 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 expertise in precision op-amps and low-power signal chains.
The LMC6042IN/NOPB belongs to TI's LMC604x micropower op-amp family, designed specifically for ultra-low-leakage, single-supply sensor interface applications in portable and energy-constrained systems.
FAQ
What is the maximum operating supply voltage for LMC6042IN/NOPB?
The absolute maximum supply voltage for LMC6042IN/NOPB is 16 V, but the recommended operating range is 4.5 V to 15.5 V. Operation above 15.5 V risks exceeding junction temperature limits or degrading long-term reliability, especially under load. The datasheet specifies guaranteed performance up to 15 V, with output swing and supply current validated at 15 V.
Does LMC6042IN/NOPB support true rail-to-rail input?
No, LMC6042IN/NOPB does not feature rail-to-rail input. Its input common-mode voltage range extends to ground (−0.4 V minimum at V+ = 5 V) and up to V+ − 2.3 V (12.7 V at V+ = 15 V), but does not include the positive rail. This design prioritizes ultra-low input bias current over full-rail input - making it ideal for ground-referenced sensors but unsuitable for inputs near V+ without external level-shifting.
Can LMC6042IN/NOPB drive capacitive loads directly?
LMC6042IN/NOPB is not unity-gain stable into pure capacitive loads >100 pF. Direct capacitive loading reduces phase margin and may cause oscillation. Stable operation requires either indirect driving (e.g., series resistor + feedback compensation as shown in Figure 30 of the datasheet) or a pull-up resistor to V+ for improved sinking response. Verified stable configurations are documented in the Applications Hints section.
What is the guaranteed input bias current specification for LMC6042IN/NOPB over temperature?
The LMC6042IN/NOPB guarantees input bias current ≤4 pA (max) over the full −40°C to +85°C operating range, with 2 pA typical at 25°C. This is ensured per Electrical Characteristics tables for both LMC6042I and LMC6042AI grades. The ultra-low IB stems from TI's Double-Poly CMOS process and remains stable across temperature - critical for long-duration integrators and high-impedance sensor buffers.
Is LMC6042IN/NOPB pin-compatible with other dual op-amps in PDIP-8 packages?
LMC6042IN/NOPB follows the industry-standard dual op-amp pinout (Pin 1: In−A, Pin 2: In+A, Pin 3: OutA, Pin 4: V−, Pin 5: In+B, Pin 6: In−B, Pin 7: OutB, Pin 8: V+), matching LM358, TLC272, and TL072. However, functional compatibility requires verification of input bias, supply current, and rail-to-rail behavior - LMC6042IN/NOPB's 2 fA IB and 10 μA/amp draw differ significantly from those parts.
LMC6042IN/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
LMC6042IN/NOPB FAQ
1.How can I place an order for LMC6042IN/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6042IN/NOPB 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 LMC6042IN/NOPB reliable?
The price and inventory of LMC6042IN/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6042IN/NOPB is usually 5 days.
3.What payment methods are accepted for LMC6042IN/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6042IN/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6042IN/NOPB?
LMC6042IN/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6042IN/NOPB 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 LMC6042IN/NOPB?
For technical support, including LMC6042IN/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6042IN/NOPB requirements.
6.How does Aetrix verify that LMC6042IN/NOPB is sourced from the original manufacturer or authorized distributors?
All LMC6042IN/NOPB 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 LMC6042IN/NOPB meets industry standards.
7.What is the process for return or replacement of LMC6042IN/NOPB?
All LMC6042IN/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMC6042IN/NOPB, 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 LMC6042IN/NOPB part is unused and in its original packaging.
Return procedure for LMC6042IN/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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