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Texas Instruments LMC6084AIM/NOPB
- Part No.:
- LMC6084AIM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC6084AIM/NOPB.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,130
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Product details
Overview
LMC6084AIM/NOPB from Texas Instruments is a precision quad CMOS operational amplifier optimized for low-offset, ultra-low-input-bias-current signal conditioning in single-supply systems. It delivers 150 µV typical offset voltage, 10 fA typical input bias current, rail-to-rail output swing within 20 mV of supply rails (at 2 kΩ load), and operates from 4.5 V to 15.5 V single supply - enabling high-accuracy photodiode preamplification and medical transducer interfacing.
For engineers reviewing the LMC6084AIM/NOPB datasheet, LMC6084AIM/NOPB pinout, LMC6084AIM/NOPB application, or LMC6084AIM/NOPB equivalent, key selection considerations include guaranteed 123 dB open-loop gain, ±1 µV/°C offset drift, 1.3 MHz gain-bandwidth product, 0.8–1.5 V/µs slew rate, and SOIC-14 package compatibility with high-impedance PCB layout requirements.
Technical Context
The LMC6084AIM/NOPB employs a proprietary CMOS input stage with guarded differential pair architecture to achieve 10 fA input bias current and input common-mode range extending to V–. Its output stage uses complementary rail-to-rail drive circuitry enabling 20 mV headroom at 2 kΩ load while maintaining stability across capacitive loads up to 100 pF when properly compensated.
It features internal frequency compensation optimized for unity-gain stability with ≥50° phase margin, supports dual- and quad-channel crosstalk rejection >140 dB at 1 kHz, and integrates latch-up immunity enhancements via substrate guard rings and controlled well structures - critical for reliable operation in high-precision analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset voltage | ±150 µV typical - enables sub-mV DC accuracy in sensor amplifiers without trimming |
| Input bias current | 10 fA typical at 25°C - preserves signal integrity in picoamp-level photodiode and piezoelectric charge amplifiers |
| Supply range | 4.5 V to 15.5 V single supply - supports battery-powered instrumentation and industrial 12 V systems |
| Output swing | Within 20 mV of rails at 2 kΩ - maximizes dynamic range in single-supply data acquisition |
| Open-loop gain | 123 dB (400 V/mV) typical - ensures <0.01% gain error in precision closed-loop configurations |
| Gain bandwidth | 1.3 MHz - supports stable 10× gain at ~130 kHz for anti-aliasing and sensor filtering |
| Slew rate | 0.8–1.5 V/µs - enables accurate reproduction of 10 kHz, 10 Vpp signals with <1% distortion |
| Input impedance | 10 TΩ - prevents loading errors in high-Z sources like pH electrodes and MEMS sensors |
Pinout & Package
LMC6084AIM/NOPB is housed in a 14-pin SOIC (D package) with exposed pad not connected internally. Pin functions are validated per TI SNOS630E Rev F (Feb 2024).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input, Channel A | High-impedance node requiring guard ring routing to maintain <10 fA leakage |
| –IN A (Pin 2) | Inverting input, Channel A | Feedback node; sensitive to stray capacitance - requires short trace and ground guard |
| OUT A (Pin 1) | Output, Channel A | Rail-to-rail capable; drives 2 kΩ load to within 20 mV of V+ or V– |
| V+ (Pin 4) | Positive power supply | Connects to main supply rail; decoupling capacitor required within 10 mm |
| V– (Pin 11) | Negative power supply / Ground reference | Reference for all inputs and outputs; must be low-impedance return path |
| +IN B (Pin 5) | Noninverting input, Channel B | Independent high-Z input; shares same process characteristics as Channel A |
| –IN B (Pin 6) | Inverting input, Channel B | Channel B feedback node; isolated from Channel A to minimize crosstalk |
| OUT B (Pin 7) | Output, Channel B | Electrically isolated output stage; >140 dB crosstalk rejection at 1 kHz |
| +IN C (Pin 10) | Noninverting input, Channel C | Third independent precision input; identical specs to Channels A/B |
| –IN C (Pin 9) | Inverting input, Channel C | Supports three-channel simultaneous sensing without inter-channel coupling |
| OUT C (Pin 8) | Output, Channel C | Enables multi-sensor signal conditioning on single IC - reduces board area and component count |
| +IN D (Pin 12) | Noninverting input, Channel D | Fourth matched input; allows full-bridge transducer readout or 4-wire RTD excitation |
| –IN D (Pin 13) | Inverting input, Channel D | Completes quad-channel architecture; supports independent gain/offset per channel |
| OUT D (Pin 14) | Output, Channel D | Delivers four fully buffered, rail-to-rail outputs - eliminates need for external buffers |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Swings to within 20 mV of V+ or V– at 2 kΩ load - preserves full-scale resolution in 12-bit+ ADC interfaces |
| Ultra-low input bias current | 10 fA typical - avoids voltage error in >1 GΩ source impedances (e.g., glass pH electrodes) |
| Input common-mode range includes V– | Operates with inputs at ground potential - simplifies single-supply level-shifting and reference design |
| High open-loop gain | 123 dB (400 V/mV) - ensures <0.005% gain error in unity-gain buffer and precision integrator applications |
| Low offset voltage drift | ±1 µV/°C - maintains calibration stability over –40°C to +85°C industrial temperature range |
| Improved latch-up immunity | Enhanced substrate isolation - prevents destructive SCR triggering during ESD or overvoltage events |
Applications
| Photodiode Preamp | Medical Transducer Interface |
|---|---|
|
Use Scenario: Amplifying weak current from silicon photodiodes in pulse oximetry or spectroscopy systems. IC Role / Device Role / Timing Role: Transimpedance amplifier with femtoamp-level input bias current and low noise density (22 nV/√Hz). Use Value: Enables detection of sub-picoamp photocurrents without signal degradation from input leakage or thermal drift. |
Use Scenario: Conditioning output from piezoelectric pressure sensors in ultrasound transducers or respiratory monitors. IC Role / Device Role / Timing Role: Charge amplifier with 10 TΩ input resistance and rail-to-rail output for full dynamic range capture. Use Value: Preserves signal fidelity from high-impedance sensors while supporting single-supply 3.3 V or 5 V microcontroller ADCs. |
| Instrumentation Amplifier Core | DAC Output Buffer |
|
Use Scenario: Building 3-op-amp instrumentation amps for biopotential measurement (ECG, EEG) using RES11A matched resistors. IC Role / Device Role / Timing Role: Precision gain stage with >140 dB crosstalk rejection and 85 dB CMRR at DC. Use Value: Achieves >100 dB common-mode rejection without laser-trimmed resistor networks - reducing BOM cost and calibration steps. |
Use Scenario: Buffering voltage outputs from 12–16-bit DACs in programmable power supplies and calibration equipment. IC Role / Device Role / Timing Role: Low-drift, low-noise unity-gain buffer with 150 µV offset and 0.01% gain linearity. Use Value: Eliminates DAC output errors caused by load variation, ensuring monotonicity and integral nonlinearity <0.5 LSB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2189IDR | Lower offset (±2 µV max), higher quiescent current (1 mA/ch), 20 MHz GBW | Better DC precision but higher power; less suitable for battery-powered designs | Select for ultra-low offset-critical metrology; avoid where <1 mA/ch supply budget is constrained |
| ADA4522-4ARUZ | Zero-drift architecture, 0.3 µV max offset, 2.2 V to 5.5 V supply, 3 MHz GBW | Superior long-term drift performance but narrower supply range and lower output drive | Prefer for zero-drift stability in lab equipment; not recommended for 12 V industrial rails or 2 kΩ loads |
Compared with OPA2189IDR and ADA4522-4ARUZ, LMC6084AIM/NOPB offers the widest single-supply range (4.5–15.5 V), lowest input bias current (10 fA), and highest input impedance (10 TΩ), making it uniquely suited for high-Z sensor interfacing where leakage and supply flexibility outweigh raw speed or zero-drift requirements.
Availability
LMC6084AIM/NOPB is available at Aetrix Electronics and suitable for medical instrumentation, industrial transducer signal chains, and portable analytical equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMC6084AIM/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 heritage in precision op amp design and manufacturing.
The LMC608x family was engineered specifically for ultra-high-impedance, low-power precision signal conditioning - targeting applications where femtoamp input bias, rail-to-rail output, and single-supply operation are mandatory, such as medical diagnostics and scientific instrumentation.
FAQ
What is the maximum supply voltage for LMC6084AIM/NOPB?
The absolute maximum supply voltage for LMC6084AIM/NOPB is 16 V (V+ to V–), but the recommended operating range is 4.5 V to 15.5 V single supply. Operation above 15.5 V risks exceeding safe junction temperature and may degrade long-term reliability, especially under load. The LMC6084AIM/NOPB datasheet specifies derating curves for continuous operation at elevated ambient temperatures.
Does LMC6084AIM/NOPB support true rail-to-rail input?
No - LMC6084AIM/NOPB supports rail-to-rail *output* swing (within 20 mV of V+ or V– at 2 kΩ), and its input common-mode range extends *to V–*, but does not reach V+. The input common-mode voltage range is specified as (V–) to (V+) – 1.9 V at 25°C. Therefore, LMC6084AIM/NOPB is not a full rail-to-rail input op amp, though it accommodates ground-referenced inputs in single-supply configurations.
Can LMC6084AIM/NOPB drive capacitive loads directly?
LMC6084AIM/NOPB is not unconditionally stable into pure capacitive loads. Direct capacitive loading degrades phase margin and can cause oscillation. Stable operation requires either a series resistor (≥100 Ω) between output and load, or a parallel RC network (e.g., 1 kΩ + 100 pF) as shown in TI's Figure 6-2. The LMC6084AIM/NOPB datasheet provides detailed guidelines for compensating capacitive loads up to 100 pF.
What is the typical input bias current of LMC6084AIM/NOPB at 85°C?
At +85°C, the typical input bias current of LMC6084AIM/NOPB increases to ±4 pA (max ±10 pA), per Section 5.7 of the TI SNOS630E datasheet. This represents a 400× increase over the 25°C typical value of 10 fA, underscoring the importance of thermal management in high-precision, high-temperature applications using LMC6084AIM/NOPB.
Is LMC6084AIM/NOPB pin-compatible with other LMC608x variants?
No - LMC6084AIM/NOPB (SOIC-14) is not pin-compatible with LMC6082 (SOIC-8) or LMC6081 (SOIC-8). The LMC6084AIM/NOPB has 14 pins to accommodate four independent amplifier channels, while the dual and single versions use 8-pin packages with different pin assignments. Board layout must be specific to the LMC6084AIM/NOPB footprint and pinout.
LMC6084AIM/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMC®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- 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:
- 2.2mA (x4 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LMC6084AIM/NOPB FAQ
1.How can I place an order for LMC6084AIM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6084AIM/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 LMC6084AIM/NOPB reliable?
The price and inventory of LMC6084AIM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6084AIM/NOPB is usually 5 days.
3.What payment methods are accepted for LMC6084AIM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6084AIM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6084AIM/NOPB?
LMC6084AIM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6084AIM/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 LMC6084AIM/NOPB?
For technical support, including LMC6084AIM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6084AIM/NOPB requirements.
6.How does Aetrix verify that LMC6084AIM/NOPB is sourced from the original manufacturer or authorized distributors?
All LMC6084AIM/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 LMC6084AIM/NOPB meets industry standards.
7.What is the process for return or replacement of LMC6084AIM/NOPB?
All LMC6084AIM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMC6084AIM/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 LMC6084AIM/NOPB part is unused and in its original packaging.
Return procedure for LMC6084AIM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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