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Texas Instruments LMC6442IMX/NOPB
- Part No.:
- LMC6442IMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC6442IMX/NOPB.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:436
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Product details
Overview
LMC6442IMX/NOPB from Texas Instruments is a dual micropower rail-to-rail output operational amplifier optimized for single-supply battery-powered systems. It delivers 0.95 µA/amplifier supply current, 9.5 kHz gain-bandwidth product, and output swing within 30 mV of both rails at 2.2 V supply-enabling precision signal conditioning in smoke detectors and portable instrumentation.
For engineers reviewing the LMC6442IMX/NOPB datasheet, LMC6442IMX/NOPB pinout, LMC6442IMX/NOPB application, or LMC6442IMX/NOPB equivalent, this page provides verified technical context, real-world design meaning for key specs, package-validated pin functions, and two confirmed alternative parts with documented functional trade-offs.
Technical Context
The LMC6442IMX/NOPB uses CMOS input stage architecture enabling 5 fA typical input bias current and rail-to-rail output swing down to 30 mV from V− and V+. Its unity-gain stability requires external RC compensation, but it is fully characterized for closed-loop gains ≥+2 or ≤−1 across 2.2 V–10 V supply range.
Designed for low-noise, low-power sensing front-ends, it maintains stable 2.1 µW/amplifier power consumption across supply voltage variation and exhibits 170 nV/√Hz input-referred voltage noise at 10 Hz. Input common-mode range extends to −0.3 V (below ground) and up to V+ − 0.9 V, supporting true ground-sensing configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 0.95 µA per amplifier at 2.2 V - enables >10-year battery life in CO detectors with coin-cell power. |
| Output Swing | Within 30 mV of V+ and V− at 2.2 V - preserves full dynamic range in single-supply 2.2 V Li-ion systems. |
| Gain-Bandwidth Product | 9.5 kHz at 2.2 V - supports DC-coupled sensor amplification up to ~4 kHz with AV = +2. |
| Input Bias Current | 5 fA typical - minimizes voltage error across >100 MΩ source impedances in gas sensor interfaces. |
| Input Common-Mode Range | −0.3 V to V+ − 0.9 V - allows direct ground-referenced input in single-supply thermostats and occupancy sensors. |
| Power Consumption | 2.1 µW per amplifier at 2.2 V - reduces thermal drift and self-heating in sealed environmental sensors. |
| CMRR | 92 dB at 2.2 V - rejects supply ripple and PCB coupling in low-voltage analog signal chains. |
Pinout & Package
LMC6442IMX/NOPB is packaged in an 8-pin SOIC (D0008A), 3.91 mm × 4.90 mm body, 1.75 mm max height, RoHS-compliant with Sn lead finish and Level-1 moisture sensitivity rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amplifier A) | Accepts differential input signal; high-impedance node sensitive to PCB leakage and guarding requirements. |
| 2 | Non-Inverting Input (Amplifier A) | Ground-sensing capable; operates down to −0.3 V, enabling true single-supply transducer interfacing. |
| 3 | Output (Amplifier A) | Rail-to-rail output drives loads up to 300 pF with external compensation; sinks/source up to 200 µA at 5 V. |
| 4 | V− (Ground) | Reference for single-supply operation; must be low-impedance to avoid PSRR degradation and offset shift. |
| 5 | Non-Inverting Input (Amplifier B) | Dual independent channel; identical specs to Pin 2 - supports dual-sensor or reference buffer use cases. |
| 6 | Inverting Input (Amplifier B) | Matched to Pin 1; enables matched dual-channel filtering or differential pair configurations without inter-channel crosstalk. |
| 7 | Output (Amplifier B) | Independent output with same drive capability as Pin 3; crosstalk rejection >85 dB prevents signal coupling between channels. |
| 8 | V+ | Single positive supply input (2.2 V–10 V); low supply current ensures minimal regulation burden on battery sources. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 0.95 µA/amplifier at 2.2 V enables decade-long operation on CR2032 cells in wireless occupancy sensors. |
| Rail-to-Rail Output | Swing within 30 mV of V+ and V− at 2.2 V maximizes usable ADC input range in 8-bit microcontroller systems. |
| Ultra-Low Input Bias Current | 5 fA typical eliminates significant offset error when interfacing with high-resistance pH or gas sensor elements. |
| Wide Supply Range | Operates from 1.8 V to 11 V - supports direct connection to single Li-ion (2.7–4.2 V) or dual alkaline (2.0–3.2 V) batteries. |
| Ground-Sensing Input | Input common-mode includes V− (down to −0.3 V) - allows direct measurement of 0–VREF sensor outputs without level-shifting. |
Applications
| Smoke/Gas Detectors | Portable Instrumentation |
|---|---|
|
Use Scenario: Amplifying low-current signals from electrochemical CO or NO₂ sensors operating on coin-cell batteries. IC Role / Device Role / Timing Role: Precision DC-coupled transimpedance amplifier with rail-to-rail output driving 10-bit SAR ADC inputs. Use Value: 5 fA input bias current prevents sensor loading; 0.95 µA supply current extends detector battery life beyond 7 years. |
Use Scenario: Signal conditioning front-end in handheld multimeters and environmental data loggers. IC Role / Device Role / Timing Role: Dual-channel buffer and gain stage for thermistor, RTD, and humidity sensor outputs. Use Value: Dual independent amplifiers reduce board space vs. two discrete op-amps; rail-to-rail swing preserves full ADC resolution. |
| Thermostats | Occupancy Sensors |
|
Use Scenario: Amplifying millivolt-level outputs from NTC thermistors in HVAC control panels powered by 3 V alkaline stacks. IC Role / Device Role / Timing Role: Low-drift, low-power non-inverting amplifier with matched dual channels for temperature and humidity sensing. Use Value: −0.3 V to V+ − 0.9 V input range enables direct ground-referenced thermistor biasing; 0.4 µV/°C TCVOS limits calibration drift. |
Use Scenario: PIR signal amplification and filtering in battery-powered smart lighting controls. IC Role / Device Role / Timing Role: AC-coupled dual-stage amplifier with high CMRR rejecting EMI from switching regulators and triac dimmers. Use Value: 92 dB CMRR at 2.2 V suppresses 50/60 Hz interference; 2.1 µW/amplifier minimizes self-heating near pyroelectric elements. |
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 |
|---|---|---|---|
| TLV2462IDR | Higher supply current (42 µA/amplifier), wider GBWP (6.4 MHz), rail-to-rail input/output - not micropower-compatible. | Better for higher-speed sensor interfaces; unsuitable for >5-year battery life targets. | Select only if bandwidth >100 kHz is required and battery life <2 years is acceptable. |
| LPV521MG/NOPB | Lower supply current (322 nA/amplifier), lower GBWP (6.5 kHz), rail-to-rail input - no rail-to-rail output swing. | Superior for ultra-low-power wake-up circuits; cannot drive full-scale ADC inputs near rails. | Choose when lowest possible quiescent current is critical and output swing >100 mV from rails is tolerable. |
Compared with TLV2462IDR and LPV521MG/NOPB, LMC6442IMX/NOPB uniquely balances sub-1 µA supply current, rail-to-rail output, and 9.5 kHz bandwidth - making it the only option for long-life, ground-sensing, full-dynamic-range analog front-ends in safety-critical detectors.
Availability
LMC6442IMX/NOPB is available at Aetrix Electronics and suitable for smoke/gas detectors, portable instrumentation, and thermostat designs requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LMC6442IMX/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 over 90 years of innovation in precision analog ICs.
The LMC6442IMX/NOPB belongs to TI's micropower precision op-amp family, engineered specifically for ultra-low-power, single-supply sensor signal conditioning in safety-critical and battery-constrained applications.
FAQ
What is the maximum supply voltage for LMC6442IMX/NOPB?
The absolute maximum supply voltage (V+ − V−) for LMC6442IMX/NOPB is 16 V, but its specified operating range is 1.8 V to 11 V. For reliable performance with guaranteed specifications, operation between 2.2 V and 10 V is recommended - as validated in the 2.2 V, 5 V, and 10 V electrical characteristics tables of the official datasheet. Exceeding 11 V risks parametric degradation or reliability impact.
Does LMC6442IMX/NOPB support true rail-to-rail input?
No, LMC6442IMX/NOPB does not support rail-to-rail input. Its input common-mode voltage range is specified as −0.3 V to V+ − 0.9 V - meaning it accepts inputs down to 0.3 V below ground (enabling ground-sensing) but cannot reach within 0.9 V of V+. This is confirmed in the 2.2 V, 5 V, and 10 V Electrical Characteristics tables where VCM min/max values are explicitly listed. The rail-to-rail capability applies only to the output stage.
Can LMC6442IMX/NOPB drive capacitive loads directly?
LMC6442IMX/NOPB is not unity-gain stable and requires external compensation (RC network) to safely drive capacitive loads. As documented in the Applications Information section, adding CC and RC enables stable operation with up to 300 pF load capacitance. Without compensation, driving >100 pF may cause oscillation or overshoot - verified in Figure 38 (Minimum Operating Gain vs. Capacitive Load) and Figure 39 (Isolating Resistor vs. Capacitive Load).
What is the input bias current specification for LMC6442IMX/NOPB?
The input bias current for LMC6442IMX/NOPB is 5 fA typical at 25°C, with a maximum of 4 pA across temperature (−40°C to +85°C) per the Electrical Characteristics table. This ultra-low value is enabled by its CMOS input stage and is critical for minimizing error in high-impedance sensor interfaces such as electrochemical gas cells or piezoresistive pressure bridges - where even picoamp-level currents induce measurable offset.
Is LMC6442IMX/NOPB pin-compatible with other dual op-amps in SOIC-8?
LMC6442IMX/NOPB follows the industry-standard SOIC-8 pinout for dual op-amps (Pin 1: A−, Pin 2: A+, Pin 3: AOUT, Pin 4: V−, Pin 5: B+, Pin 6: B−, Pin 7: BOUT, Pin 8: V+), matching TI's TLV2462, OPA2340, and many others. However, electrical compatibility is not guaranteed - differences in input structure, supply current, and stability requirements mean direct substitution requires circuit validation. The pinout is standardized, but functionality is not drop-in.
LMC6442IMX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMC®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 0.0041V/µs
- Gain Bandwidth Product:
- 10.5 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.005 pA
- Voltage - Input Offset:
- 1.5 mV
- Current - Supply:
- 1.9µA (x2 Channels)
- Current - Output / Channel:
- 2.1 mA
- Voltage - Supply Span (Min):
- 1.8 V
- Voltage - Supply Span (Max):
- 11 V
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
LMC6442IMX/NOPB FAQ
1.How can I place an order for LMC6442IMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6442IMX/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 LMC6442IMX/NOPB reliable?
The price and inventory of LMC6442IMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6442IMX/NOPB is usually 5 days.
3.What payment methods are accepted for LMC6442IMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6442IMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6442IMX/NOPB?
LMC6442IMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6442IMX/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 LMC6442IMX/NOPB?
For technical support, including LMC6442IMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6442IMX/NOPB requirements.
6.How does Aetrix verify that LMC6442IMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMC6442IMX/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 LMC6442IMX/NOPB meets industry standards.
7.What is the process for return or replacement of LMC6442IMX/NOPB?
All LMC6442IMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMC6442IMX/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 LMC6442IMX/NOPB part is unused and in its original packaging.
Return procedure for LMC6442IMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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