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Texas Instruments LMC6082IM/NOPB
- Part No.:
- LMC6082IM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC6082IM/NOPB.pdf
- Description:
- IC CMOS 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,136
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Product details
Overview
LMC6082IM/NOPB from Texas Instruments is a precision dual CMOS operational amplifier optimized for low-offset, ultra-low-input-bias-current applications in single-supply instrumentation circuits. It delivers 150 μV typical input offset voltage, 10 fA typical input bias current, rail-to-rail output swing within 20 mV of supply rails (at 100 kΩ load), and operates from 4.5 V to 15 V. It is used in photodiode preamplifiers, medical sensor front-ends, and high-impedance transducer interfaces where leakage and drift must be minimized.
For engineers reviewing the LMC6082IM/NOPB datasheet, LMC6082IM/NOPB pinout, LMC6082IM/NOPB application, or LMC6082IM/NOPB equivalent, key selection considerations include guaranteed input bias current ≤100 fA over temperature, rail-to-rail output capability with 130 dB open-loop gain, and SOIC-8 packaging suitable for space-constrained analog signal chains requiring long-term DC stability.
Technical Context
The LMC6082IM/NOPB employs a proprietary CMOS input stage with double-poly silicon-gate process, enabling femtoampere-level input bias current and input common-mode range extending to V− (ground). Its output stage uses direct integrator feedback-not a conventional push-pull buffer-delivering rail-to-rail swing while maintaining low output impedance and high large-signal voltage gain (≥300 V/mV at 2 kΩ).
This architecture supports stable operation with capacitive loads when paired with external compensation (e.g., pull-up resistor or feed-forward capacitor), and provides >140 dB amp-to-amp isolation. The device achieves 1.3 MHz gain-bandwidth product and 1.5 V/μs slew rate while consuming only 1.1 mA per amplifier at 15 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | 150 μV typical; ensures ≤0.01% error in 10 V full-scale precision gain stages without trimming. |
| Input Bias Current | 10 fA typical; enables use with >1014 Ω source impedances (e.g., piezoelectric sensors, pH electrodes) without significant DC error. |
| Supply Voltage Range | 4.5 V to 15 V single supply; supports battery-powered (5 V) and industrial (12–15 V) systems without split-rail generation. |
| Output Swing | Within 20 mV of rails at 100 kΩ; delivers true 0–5 V or 0–12 V dynamic range for ADC interfacing and active filtering. |
| Open-Loop Gain | 130 dB typical; maintains ≥60 dB CMRR and PSRR across 0–12 V common-mode range for robust noise rejection. |
| Gain-Bandwidth Product | 1.3 MHz; supports stable unity-gain buffering and closed-loop gains up to ~100 at 10 kHz for sensor signal conditioning. |
| Slew Rate | 1.5 V/μs typical; enables accurate reproduction of 10 kHz sine waves at 10 VPP with <0.01% THD. |
| Input Common-Mode Range | Includes V− (ground); allows direct sensing of unipolar signals referenced to system ground without level-shifting circuitry. |
Pinout & Package
LMC6082IM/NOPB is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package per JEDEC MS-012 variation AA, with 1.27 mm lead pitch, 3.91 mm body width, and 1.75 mm max height. Pin 1 is marked by a beveled corner or dot; the package is RoHS-compliant and green (halogen-free).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (Amplifier A) | High-impedance node accepting differential signal; requires guarding for sub-pA leakage control. |
| 2 | Non-Inverting Input (Amplifier A) | Reference point for A-channel gain setting; shares same ultra-low bias current spec as Pin 1. |
| 3 | Output (Amplifier A) | Rail-to-rail capable; drives loads down to 600 Ω while maintaining 20 mV headroom to supply rails. |
| 4 | V− (Ground / Negative Supply) | Return path for both amplifiers; input common-mode extends to this pin, enabling true single-supply operation. |
| 5 | Non-Inverting Input (Amplifier B) | Independent high-Z input for second channel; identical bias current and offset specs as Pins 1 and 2. |
| 6 | Inverting Input (Amplifier B) | Second differential input; usable in dual-channel instrumentation or cascaded filter topologies. |
| 7 | Output (Amplifier B) | Fully independent output; >140 dB isolation prevents crosstalk in multi-channel precision acquisition. |
| 8 | V+ (Positive Supply) | Power rail for both amplifiers; accepts 4.5–15 V; internal ESD protection rated to 2 kV HBM. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 10 fA typical - enables direct connection to high-impedance sources (e.g., photodiodes, glass electrodes) without guard-ring complexity in most layouts. |
| Rail-to-rail output swing | Within 20 mV of V+ and V− at 100 kΩ - maximizes dynamic range for 12-bit+ ADCs operating on single 5 V or 12 V rails. |
| Input common-mode range includes V− | Operates with inputs at ground potential - eliminates need for negative supply or level-shifting in unipolar sensor interfaces. |
| High DC precision | 150 μV VOS, 1.0 μV/°C TCVOS, 130 dB AV - supports 16-bit-equivalent resolution in DC-coupled measurement paths. |
| Improved latchup immunity | Withstands 100 mA surge on I/O pins - enhances reliability in noisy industrial environments with transient coupling. |
| Low-noise performance | 22 nV/√Hz voltage noise at 1 kHz - preserves SNR in low-level signal amplification before digitization. |
Applications
| Photodiode Preamplifier | Medical Transducer Amplifier |
|---|---|
|
Use Scenario: Amplifying weak current from reverse-biased silicon photodiodes in pulse oximetry or spectroscopy modules. IC Role / Device Role / Timing Role: Transimpedance amplifier with >1012 Ω feedback resistance; LMC6082IM/NOPB provides femtoampere input bias and rail-to-rail output for full-scale 0–3.3 V ADC input. Use Value: Enables detection of sub-nA photocurrents without calibration drift; 10 fA bias current limits dark-current-induced offset to <1 μV at 1 MΩ feedback. |
Use Scenario: Conditioning signals from piezoresistive pressure sensors in portable ventilators or infusion pumps. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier front-end; one channel for bridge excitation reference, second for differential bridge output. Use Value: 150 μV offset and 130 dB CMRR ensure <0.01% gain error across 0–100 kPa range; input range including ground simplifies single-supply bridge biasing. |
| Charge Amplifier for Piezo Sensors | Low-Leakage Sample-and-Hold |
|
Use Scenario: Integrating charge from accelerometers or knock sensors in automotive engine control units. IC Role / Device Role / Timing Role: Precision integrator using LMC6082IM/NOPB's ultra-low input current to minimize integration drift over 100 ms windows. Use Value: 10 fA bias current contributes <0.1 pC/s integration error - less than 0.05% of typical 200 pC sensor output over 100 ms hold time. |
Use Scenario: Capturing and holding analog outputs from high-precision DACs in automated test equipment. IC Role / Device Role / Timing Role: Unity-gain buffer with guarded input; LMC6082IM/NOPB holds sampled voltage with <10 μV/s droop due to input bias current. Use Value: Achieves >16-bit hold accuracy for >10 ms intervals without active refresh; rail-to-rail swing matches DAC output range exactly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision dual op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC6062IM/NOPB | Lower supply current (1.0 μA vs 1.1 mA), but higher VOS (250 μV typ) and lower GBW (0.14 MHz). | Better suited for micropower (<10 μA) battery-critical designs where speed and offset are secondary. | Select LMC6062IM/NOPB only when power budget is <2 μA per amplifier and bandwidth <100 kHz is acceptable. |
| OPA2188AIDR | Zero-drift architecture, 0.003 μV/°C drift, but higher input bias current (±120 pA) and no V−-inclusive common-mode range. | Preferred for ultra-stable DC offsets over temperature, but requires dual supply or level-shifting for ground-referenced inputs. | Choose OPA2188AIDR when long-term drift dominates design requirements and input signals are centered away from ground. |
Compared with LMC6062IM/NOPB and OPA2188AIDR, the LMC6082IM/NOPB uniquely balances femtoampere input bias, rail-to-rail output, and ground-inclusive input range-making it the only option among the three for high-impedance, single-supply, DC-precision applications like pH probes or piezoelectric charge integration.
Availability
LMC6082IM/NOPB is available at Aetrix Electronics and suitable for medical instrumentation, industrial sensor interfaces, and portable analytical equipment requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LMC6082IM/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-chain solutions.
The LMC6082IM/NOPB belongs to TI's LMC precision CMOS op-amp family, designed specifically for single-supply, high-impedance, low-drift applications in medical, scientific, and industrial instrumentation where input leakage and DC accuracy are critical.
FAQ
What is the maximum operating temperature range for the LMC6082IM/NOPB?
The LMC6082IM/NOPB is specified for operation from −40°C to +85°C (industrial grade). This range is confirmed in the Operating Ratings table of the official datasheet (SNOS630D, Rev. March 2013), and applies to the IM/NOPB variant in SOIC-8 packaging. Junction temperature must not exceed 150°C under any condition.
Does the LMC6082IM/NOPB support true single-supply operation with inputs at ground potential?
Yes. The LMC6082IM/NOPB features an input common-mode voltage range that explicitly includes V− (ground), as verified in the DC Electrical Characteristics table (VCM min = −0.1 V at V+ = 5 V). This allows direct connection of sensors referenced to ground without level-shifting circuitry-confirmed in Figure 31 (Instrumentation Amplifier) and Applications Hints sections.
What is the guaranteed input bias current limit for LMC6082IM/NOPB over temperature?
The datasheet specifies a maximum input bias current of 100 fA for the LMC6082I grade (which includes LMC6082IM/NOPB) across the full −40°C to +85°C operating range. This is listed under "IB Input Bias Current" in the DC Electrical Characteristics table, with "Max" values bolded for temperature extremes.
Can LMC6082IM/NOPB drive capacitive loads directly, and if not, what compensation is recommended?
The LMC6082IM/NOPB is not optimized for direct capacitive loading; unbuffered capacitive loads degrade phase margin and cause ringing. Per Applications Hints (page 10), recommended compensation includes adding a pull-up resistor to V+ (≥500 μA current) or using feed-forward capacitance (Cf) in parallel with the feedback resistor to cancel input capacitance effects-both methods validated in Figures 26 and 27.
Is LMC6082IM/NOPB pin-compatible with other dual op-amps in SOIC-8 packages, such as LM358 or TL072?
No. While all share the SOIC-8 footprint, LMC6082IM/NOPB has different electrical behavior and layout requirements: its ultra-low bias current demands guarded traces and clean PCB surfaces, unlike LM358 (nA-level bias) or TL072 (pA-level but no rail-to-rail output). Pin mapping matches standard dual op-amp conventions (Pins 1–3/A, 4/V−, 5–7/B, 8/V+), but functional substitution requires full circuit revalidation.
LMC6082IM/NOPB 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:
- 1.5V/µs
- Gain Bandwidth Product:
- 1.3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.01 pA
- Voltage - Input Offset:
- 150 µV
- Current - Supply:
- 1.1mA (x2 Channels)
- Current - Output / Channel:
- 34 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
LMC6082IM/NOPB FAQ
1.How can I place an order for LMC6082IM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6082IM/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 LMC6082IM/NOPB reliable?
The price and inventory of LMC6082IM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6082IM/NOPB is usually 5 days.
3.What payment methods are accepted for LMC6082IM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6082IM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6082IM/NOPB?
LMC6082IM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6082IM/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 LMC6082IM/NOPB?
For technical support, including LMC6082IM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6082IM/NOPB requirements.
6.How does Aetrix verify that LMC6082IM/NOPB is sourced from the original manufacturer or authorized distributors?
All LMC6082IM/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 LMC6082IM/NOPB meets industry standards.
7.What is the process for return or replacement of LMC6082IM/NOPB?
All LMC6082IM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMC6082IM/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 LMC6082IM/NOPB part is unused and in its original packaging.
Return procedure for LMC6082IM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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