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Texas Instruments LMC6084AIMX/NOPB
- Part No.:
- LMC6084AIMX/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC6084AIMX/NOPB.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,408
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Product details
Overview
LMC6084AIMX/NOPB from Texas Instruments is a precision quad CMOS operational amplifier optimized for ultra-low-input-bias-current, single-supply instrumentation circuits. It delivers 150 µV typical offset voltage, 10 fA input bias current, rail-to-rail output swing within 20 mV of supply rails (at 2 kΩ), and 123 dB open-loop gain - enabling high-accuracy signal conditioning in photodiode preamplifiers, medical transducer interfaces, and DAC output buffers.
For engineers reviewing the LMC6084AIMX/NOPB datasheet, LMC6084AIMX/NOPB pinout, LMC6084AIMX/NOPB application, or LMC6084AIMX/NOPB equivalent, key selection considerations include guaranteed 10 fA input bias current at 25°C, ±800 µV max offset over –40°C to +85°C, SOIC-14 package compatibility, and verified performance in charge-amplifier and single-supply instrumentation amplifier topologies.
Technical Context
The LMC6084AIMX/NOPB employs a proprietary CMOS input stage with guarded differential pair architecture to achieve sub-10 fA input bias current while maintaining >10 TΩ input resistance. Its rail-to-rail output stage uses complementary push-pull drivers with internal compensation tuned for stability with ≥600 Ω resistive loads and moderate capacitive loads.
It supports true single-supply operation from 4.5 V to 15.5 V (or ±2.25 V to ±7.75 V dual supply), with input common-mode range extending to V– and output swing to within 20 mV of both rails under 2 kΩ load - critical for maximizing dynamic range in low-voltage sensor front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input bias current | 10 fA typical at 25°C - enables leakage-limited measurements in piezoelectric/photodiode circuits without guard-ring degradation |
| Input offset voltage | ±150 µV typical, ±800 µV max over –40°C to +85°C - ensures <0.1% gain error in 100× transducer amplifiers |
| Open-loop gain | 123 dB typical (400 V/mV) at 15 V supply - provides >80 dB loop gain at 100× closed-loop gain for stable precision DC amplification |
| Output swing | Within 20 mV of V+ and V– at 2 kΩ load - preserves full 14.6 Vpp dynamic range on 15 V single supply |
| Gain bandwidth product | 1.3 MHz - supports stable 10× amplification up to ~100 kHz with adequate phase margin |
| Supply voltage range | 4.5 V to 15.5 V single supply - compatible with 5 V and 12 V industrial rails without level-shifting |
| Quiescent current | 0.75 mA per amplifier at 5 V - enables four-channel precision amplification in battery-powered handheld instruments |
Pinout & Package
LMC6084AIMX/NOPB is housed in a 14-pin SOIC (D package) with exposed pad not present. The device integrates four independent amplifiers sharing common V+ (Pin 4) and V– (Pin 11) supply pins, with fully isolated input/output terminals per channel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input, Channel A | High-impedance node for reference-signal injection or sensor-positive connection |
| –IN A (Pin 2) | Inverting input, Channel A | Feedback node for transimpedance or difference amplifier configurations |
| OUT A (Pin 1) | Output, Channel A | Rail-to-rail capable driver for ADC input or analog multiplexer interface |
| +IN B (Pin 5) | Noninverting input, Channel B | Independent high-Z input for second sensor channel or reference buffer |
| –IN B (Pin 6) | Inverting input, Channel B | Isolated feedback path preventing crosstalk between adjacent channels |
| OUT B (Pin 7) | Output, Channel B | Dedicated output minimizing inter-channel loading in multi-channel data acquisition |
| +IN C (Pin 10) | Noninverting input, Channel C | Third channel input supporting simultaneous multi-parameter sensing |
| –IN C (Pin 9) | Inverting input, Channel C | Separate feedback node enabling independent gain setting per channel |
| OUT C (Pin 8) | Output, Channel C | Output routed to dedicated trace to avoid shared trace impedance modulation |
| +IN D (Pin 12) | Noninverting input, Channel D | Fourth high-Z input for calibration reference or auxiliary signal path |
| –IN D (Pin 13) | Inverting input, Channel D | Final isolated feedback node supporting independent channel trimming |
| OUT D (Pin 14) | Output, Channel D | Output with matched drive strength ensuring consistent settling across all four channels |
| V+ (Pin 4) | Positive power supply | Common rail for all four amplifiers; decoupling required within 10 mm of pin |
| V– (Pin 11) | Negative power supply | Ground or negative rail return; must be low-impedance for bias current return path |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 10 fA typical enables femtoampere-level photocurrent measurement without guard-ring complexity |
| Rail-to-rail output swing | 20 mV from rails at 2 kΩ preserves >98% of available voltage headroom in 5 V systems |
| Input common-mode range includes V– | Supports ground-referenced sensor inputs without level-shifting circuitry or dual supplies |
| High CMRR (85 dB typical) | Maintains accuracy in noisy industrial environments with bridge-based transducers |
| Improved latch-up immunity | Robust against ESD-induced SCR triggering during board handling or system hot-plug events |
Applications
| Photodiode Preamp | Medical Transducer Interface |
|---|---|
|
Use Scenario: Amplifying weak current from silicon photodiodes in pulse oximetry sensors. IC Role / Device Role / Timing Role: Transimpedance amplifier converting 100 fA–1 nA photocurrent to measurable voltage with minimal input loading. Use Value: 10 fA input bias current prevents signal corruption; rail-to-rail output maximizes ADC utilization in 3.3 V portable systems. |
Use Scenario: Conditioning signals from piezoelectric pressure sensors in ultrasound probe front-ends. IC Role / Device Role / Timing Role: Charge amplifier integrating high-impedance sensor output while rejecting cable capacitance effects. Use Value: Input resistance >10 TΩ avoids signal attenuation; 150 µV offset ensures sub-mmHg pressure resolution. |
| Single-Supply Instrumentation Amp | DAC Output Buffer |
|
Use Scenario: Building 3-op-amp instrumentation amplifiers for pH electrode readout in handheld analyzers. IC Role / Device Role / Timing Role: Dual-channel configuration as input buffers and difference amplifier in RES11A-matched topology. Use Value: Matched channel specs ensure <0.01% gain error; 85 dB CMRR rejects common-mode noise from electrode cables. |
Use Scenario: Buffering 16-bit DAC outputs in programmable power supply control loops. IC Role / Device Role / Timing Role: Quad-channel unity-gain follower driving multiple DAC outputs with independent settling. Use Value: 123 dB open-loop gain guarantees <0.0015% gain error; 1.3 MHz GBW supports fast DAC update rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC6084IMX/NOPB | Same die, industrial-grade temperature range (–40°C to +125°C) vs. LMC6084AIMX/NOPB's extended range (–40°C to +85°C); identical electrical specs | Required for automotive under-hood or industrial motor-control ambient conditions above 85°C | Select LMC6084IMX/NOPB only when junction temperature exceeds 85°C; otherwise LMC6084AIMX/NOPB offers same precision at lower cost |
| OPA2182IDR | Lower offset drift (0.003 µV/°C vs. 1 µV/°C), higher PSRR (140 dB), but 20× higher input bias current (200 fA) | Better for high-precision DC-coupled systems with wide temperature swings; unsuitable for femtoampere photodiode apps | Choose OPA2182IDR when offset drift dominates error budget; retain LMC6084AIMX/NOPB for ultra-high-Z sensor interfacing |
Compared with LMC6084IMX/NOPB, the LMC6084AIMX/NOPB trades 40°C max operating temperature for cost efficiency in commercial-grade instrumentation; versus OPA2182IDR, it sacrifices drift performance to achieve 20× lower input bias current essential for charge-integration and photodiode applications.
Availability
LMC6084AIMX/NOPB is available at Aetrix Electronics and suitable for medical transducer interfaces, photodiode preamplifiers, and single-supply instrumentation amplifier designs requiring stable component supply across production lifecycles.
Supply support for LMC6084AIMX/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-low-leakage, single-supply precision signal conditioning - targeting medical instrumentation, analytical sensors, and high-impedance transducer interfaces where femtoampere-level input bias current is mandatory.
FAQ
What is the maximum supply voltage for LMC6084AIMX/NOPB?
The absolute maximum supply voltage for LMC6084AIMX/NOPB is 16 V (single supply) or ±8 V (dual supply), but recommended operation is limited to 4.5 V to 15.5 V. Exceeding 15.5 V risks reliability degradation, especially when output is shorted to V+, as noted in TI's datasheet Section 5.1.
Does LMC6084AIMX/NOPB support true rail-to-rail input?
No - LMC6084AIMX/NOPB features rail-to-rail *output* swing and an input common-mode range that extends to V–, but its input does not reach V+. The datasheet specifies input common-mode range up to (V+) – 1.9 V at 25°C, limiting high-side sensing without level-shifting.
Can LMC6084AIMX/NOPB drive capacitive loads directly?
LMC6084AIMX/NOPB is not optimized for direct capacitive load driving. Stability degrades beyond ~100 pF without external compensation. TI recommends using a series resistor (e.g., 50–500 Ω) between output and load, or adding a pull-up resistor to V+ as described in Section 6.1.3 of the datasheet.
What is the thermal resistance θJA for LMC6084AIMX/NOPB in SOIC-14 package?
The junction-to-ambient thermal resistance (θJA) for LMC6084AIMX/NOPB in the D (SOIC-14) package is 126°C/W, as specified in Section 5.6 of the datasheet. This value assumes standard JEDEC 2-layer board mounting; actual thermal performance depends on PCB copper area and airflow.
How does LMC6084AIMX/NOPB differ from LMC6082?
LMC6084AIMX/NOPB is a quad-channel version in SOIC-14, while LMC6082 is dual-channel in SOIC-8. Both share identical per-channel specifications (150 µV offset, 10 fA bias current, 123 dB gain), but LMC6084AIMX/NOPB provides two additional independent amplifiers in the same footprint density, reducing board space in multi-channel data acquisition systems.
LMC6084AIMX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- LMC®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
LMC6084AIMX/NOPB FAQ
1.How can I place an order for LMC6084AIMX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6084AIMX/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 LMC6084AIMX/NOPB reliable?
The price and inventory of LMC6084AIMX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6084AIMX/NOPB is usually 5 days.
3.What payment methods are accepted for LMC6084AIMX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6084AIMX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6084AIMX/NOPB?
LMC6084AIMX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6084AIMX/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 LMC6084AIMX/NOPB?
For technical support, including LMC6084AIMX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6084AIMX/NOPB requirements.
6.How does Aetrix verify that LMC6084AIMX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMC6084AIMX/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 LMC6084AIMX/NOPB meets industry standards.
7.What is the process for return or replacement of LMC6084AIMX/NOPB?
All LMC6084AIMX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMC6084AIMX/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 LMC6084AIMX/NOPB part is unused and in its original packaging.
Return procedure for LMC6084AIMX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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