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Texas Instruments LMC6084IM/NOPB
- Part No.:
- LMC6084IM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC6084IM/NOPB.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:410
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Product details
Overview
LMC6084IM/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 and medical sensor front-ends.
For engineers reviewing the LMC6084IM/NOPB datasheet, LMC6084IM/NOPB pinout, LMC6084IM/NOPB application, or LMC6084IM/NOPB equivalent, key selection considerations include its guaranteed 4.5–15.5 V single-supply operation, input common-mode range extending to V–, 1.3 MHz gain-bandwidth product, and SOIC-14 package compatibility with high-impedance PCB layout requirements.
Technical Context
The LMC6084IM/NOPB employs a proprietary CMOS input stage with guarded gate design to achieve 10 fA input bias current and >10 TΩ input resistance. Its rail-to-rail output stage uses complementary push-pull architecture with internal compensation to maintain stability across capacitive loads up to 100 pF when paired with appropriate series resistance.
It supports true single-supply operation with input common-mode voltage range spanning from V– to (V+) – 1.9 V and output swing from V– + 0.10 V to V+ – 0.26 V (at VS = 15 V, RL = 2 kΩ), making it suitable for ground-referenced transducer interfaces without level-shifting circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | ±150 µV typical - enables sub-mV DC accuracy in 12-bit+ data acquisition systems 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 - powers directly from 5 V or 12 V rails without regulators in portable medical devices |
| Output Swing | Within 20 mV of rails at 2 kΩ - maximizes dynamic range in 0–5 V or 0–12 V ADC interfacing |
| Gain-Bandwidth | 1.3 MHz - supports stable closed-loop gains up to ~100 at 10 kHz for sensor signal filtering |
| Open-Loop Gain | 123 dB (1400 V/mV) - ensures <0.01% gain error in unity-gain buffers and precision integrators |
| CMRR | 85 dB typical - rejects common-mode noise in bridge-based pressure/strain transducers |
Pinout & Package
LMC6084IM/NOPB is housed in a 14-pin SOIC (D package) with exposed pad not electrically connected. Pin functions are fully defined per TI SNOS630E Rev FEBRUARY 2024.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUT A/B/C/D | Amplifier outputs - each independently drives 2 kΩ load to rail with <20 mV headroom |
| 2, 6, 9, 13 | –IN A/B/C/D | Inverting inputs - high-impedance nodes requiring guard rings to preserve 10 fA bias spec |
| 3, 5, 10, 12 | +IN A/B/C/D | Noninverting inputs - accept common-mode voltages down to V– (ground in single supply) |
| 4 | V+ | Positive supply - connects to main system rail (4.5–15.5 V); decoupling capacitor required |
| 11 | V– | Negative supply - tied to ground in single-supply mode; must be low-impedance return path |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Swings within 20 mV of V+ and V– at 2 kΩ - eliminates need for dual supplies in battery-powered sensors |
| Ultra-low input bias current | 10 fA typical - enables femtoamp-level current measurement in radiation detectors and electrophysiology |
| Single-supply compatible input stage | Common-mode range includes V– - allows direct connection of grounded thermocouples or strain gauges |
| High open-loop gain | 123 dB - ensures <0.005% gain error in unity-gain follower configurations used for signal buffering |
| Improved latch-up immunity | Robust against ESD-induced SCR triggering - critical for field-deployed industrial instrumentation |
Applications
| Photodiode Preamp | Medical Sensor Front-End |
|---|---|
Use Scenario: Amplifying weak current from silicon photodiodes in pulse oximeters or environmental light sensors. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photocurrent to 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 or 5 V systems. | Use Scenario: Conditioning biopotential signals (ECG, EEG) from dry-contact electrodes with high source impedance. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier input buffer rejecting electrode half-cell potential drift. Use Value: Input common-mode range including V– enables true ground-referenced design; 150 µV offset minimizes baseline wander. |
| Piezoelectric Charge Amp | Bridge Transducer Signal Chain |
Use Scenario: Integrating charge output from accelerometers or pressure sensors in structural health monitoring. IC Role / Device Role / Timing Role: Low-leakage integrator with guarded input node preserving charge integrity over seconds-scale time constants. Use Value: >10 TΩ input resistance and 10 fA bias enable stable integration for >10 s time constants without active reset. | Use Scenario: Amplifying differential output from Wheatstone bridge pressure or load cells in industrial control systems. IC Role / Device Role / Timing Role: Precision difference amplifier with matched gain-setting resistors (e.g., RES11A) for high CMRR. Use Value: 85 dB CMRR and ±150 µV offset ensure <0.02% full-scale error under 10 mV common-mode interference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC6064IM/NOPB | Micropower variant: 80 µA IQ vs 750 µA; lower GBW (0.17 MHz); same 10 fA IB | Better suited for battery life-critical, low-frequency (<10 kHz) sensing where speed is secondary | Select LMC6064IM/NOPB only if quiescent current <100 µA is mandatory and bandwidth ≤200 kHz suffices |
| OPA2189IDR | Zero-drift architecture: 0.005 µV/°C drift vs 1 µV/°C; higher IQ (410 µA); 2.1 MHz GBW | Superior long-term DC stability in temperature-varying environments; requires dual supply for full rail access | Choose OPA2189IDR when offset drift dominates error budget and dual supply is available |
Compared with LMC6064IM/NOPB, LMC6084IM/NOPB trades 9× higher supply current for 7.6× greater bandwidth and superior output drive; versus OPA2189IDR, it offers true single-supply rail-to-rail operation and lower cost but lacks auto-zero correction for ultra-stable DC performance.
Availability
LMC6084IM/NOPB is available at Aetrix Electronics and suitable for medical instrumentation, photodiode signal conditioning, and precision transducer amplification requiring stable component supply across multi-year production cycles.
Supply support for LMC6084IM/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 delivering analog and embedded processing solutions with emphasis on reliability, precision, and power efficiency.
The LMC608x family was designed specifically for high-impedance, low-leakage precision analog signal chains in battery-operated and single-supply instrumentation systems.
FAQ
What is the maximum recommended supply voltage for LMC6084IM/NOPB?
The absolute maximum supply voltage for LMC6084IM/NOPB is 16 V, but the recommended operating range is 4.5 V to 15.5 V for reliable performance. Operation above 15.5 V risks exceeding safe junction temperature and may degrade long-term reliability, especially under sustained output loading. Always observe thermal derating curves in the datasheet when operating near upper limits.
Does LMC6084IM/NOPB support true rail-to-rail input?
LMC6084IM/NOPB supports rail-to-rail output swing but not full rail-to-rail input: its input common-mode range extends to V– (enabling ground-referenced inputs) and up to (V+) – 1.9 V. This means the maximum allowable input voltage is 1.9 V below the positive rail - sufficient for most single-supply sensor interfaces but requiring attenuation for signals near V+.
Can LMC6084IM/NOPB drive capacitive loads directly?
LMC6084IM/NOPB exhibits reduced phase margin with direct capacitive loads >50 pF. For stable operation, use a series resistor (typically 100–500 Ω) between the output and capacitive load, or implement a feedback network with Cf as described in TI's application note SNOS630E Section 6.1.3. Uncompensated direct driving may cause ringing or oscillation.
What is the typical input offset voltage drift of LMC6084IM/NOPB over temperature?
The typical input offset voltage drift of LMC6084IM/NOPB is 1 µV/°C across –40°C to +85°C. This value is specified in the Electrical Characteristics table (dVOS/dT) and reflects the linear coefficient of offset change with ambient temperature - critical for maintaining DC accuracy in uncalibrated industrial sensors operating across wide temperature ranges.
Is LMC6084IM/NOPB pin-compatible with other LMC608x variants?
No, LMC6084IM/NOPB is not pin-compatible with LMC6081 or LMC6082: it uses a 14-pin SOIC package with four independent amplifiers, while LMC6081 (8-pin) and LMC6082 (8-pin) contain one and two channels respectively. Pin mapping differs entirely - e.g., V– is on pin 11 in LMC6084IM/NOPB but pin 4 in LMC6082 - requiring PCB redesign for substitution.
LMC6084IM/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
LMC6084IM/NOPB FAQ
1.How can I place an order for LMC6084IM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6084IM/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 LMC6084IM/NOPB reliable?
The price and inventory of LMC6084IM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6084IM/NOPB is usually 5 days.
3.What payment methods are accepted for LMC6084IM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6084IM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6084IM/NOPB?
LMC6084IM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6084IM/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 LMC6084IM/NOPB?
For technical support, including LMC6084IM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6084IM/NOPB requirements.
6.How does Aetrix verify that LMC6084IM/NOPB is sourced from the original manufacturer or authorized distributors?
All LMC6084IM/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 LMC6084IM/NOPB meets industry standards.
7.What is the process for return or replacement of LMC6084IM/NOPB?
All LMC6084IM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMC6084IM/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 LMC6084IM/NOPB part is unused and in its original packaging.
Return procedure for LMC6084IM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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