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Texas Instruments LMC6084AIM
- Part No.:
- LMC6084AIM
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC6084AIM.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,121
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Product details
Overview
LMC6084AIM from Texas Instruments is a precision quad CMOS operational amplifier optimized for ultra-low-input-bias-current, single-supply instrumentation applications. 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 medical sensors, photodiode preamps, and piezoelectric charge amplifiers.
For engineers reviewing the LMC6084AIM datasheet, LMC6084AIM pinout, LMC6084AIM application, or LMC6084AIM equivalent, this page provides verified specifications, SOIC-14 package mapping, channel-specific terminal roles, real-world use cases with design-meaning context, and two validated alternative parts with documented functional and application-level differences.
Technical Context
The LMC6084AIM employs a proprietary CMOS input stage with guarded gate 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 0.8–1.5 V/µs slew rate and 1.3 MHz gain-bandwidth product.
It operates from 4.5 V to 15.5 V single supply (or ±2.25 V to ±7.75 V dual supply), supports –40°C to +85°C junction temperature, and features 85 dB PSRR (positive rail) and 94 dB PSRR (negative rail) - making it suitable for battery-powered, high-impedance sensor front-ends where supply rejection and low drift are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | ±150 µV typical - enables sub-mV DC accuracy in 12-bit+ systems without trimming |
| Input Bias Current | 10 fA typical at 25°C - preserves signal integrity in >1 GΩ source impedances (e.g., photodiodes) |
| Supply Range | 4.5 V to 15.5 V single supply - supports direct interfacing with 5 V and 12 V industrial rails |
| Output Swing | Within 20 mV of V+ and V– 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 unity-gain buffers and precision amplifiers |
| Gain Bandwidth | 1.3 MHz - sufficient for 100 kHz closed-loop bandwidth with moderate gain (e.g., G = 10) |
| CMRR | 85 dB typical - rejects common-mode noise in bridge-based transducer interfaces |
Pinout & Package
LMC6084AIM is housed in a 14-pin SOIC (D package) with exposed pad not electrically connected. Pin numbering follows standard JEDEC SOIC-14 convention, with four independent amplifier channels sharing common power rails.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives external load; rail-to-rail capable |
| 2 | –IN A | Inverting input, channel A - connects to feedback network or inverting node |
| 3 | +IN A | Noninverting input, channel A - high-impedance sensor interface point |
| 4 | V+ | Positive supply - must be decoupled locally with ≥0.1 µF ceramic capacitor |
| 5 | +IN B | Noninverting input, channel B - isolated from other inputs for multi-channel sensing |
| 6 | –IN B | Inverting input, channel B - dedicated to second amplifier's feedback path |
| 7 | OUT B | Amplifier B output - independent output stage, no crosstalk below 140 dB |
| 8 | OUT C | Amplifier C output - fully buffered, same specs as OUT A/B/D |
| 9 | –IN C | Inverting input, channel C - supports differential or single-ended configurations |
| 10 | +IN C | Noninverting input, channel C - referenced to same V– as all channels |
| 11 | V– | Negative supply - ground reference in single-supply operation |
| 12 | +IN D | Noninverting input, channel D - enables 4-channel simultaneous sampling |
| 13 | –IN D | Inverting input, channel D - isolated input node for fourth signal path |
| 14 | OUT D | Amplifier D output - identical performance to other outputs; supports parallel drive |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | Operates within 20 mV of V+ and V– at 2 kΩ - eliminates need for dual supplies in portable instrumentation |
| Ultra-low input bias current | 10 fA typical - prevents signal loss in high-Z sources like pH electrodes and piezoelectric transducers |
| Input common-mode range includes V– | Accepts signals down to V– (0 V in single supply) - simplifies level-shifting in grounded-sensor topologies |
| High open-loop gain | 123 dB (400 V/mV) - ensures stable closed-loop gain accuracy even with 1% feedback resistors |
| Low input voltage noise | 22 nV/√Hz at 1 kHz - preserves SNR in low-frequency sensor amplification (e.g., ECG, strain gauges) |
Applications
| Instrumentation Amplifier | Photodiode Preamp |
|---|---|
Use Scenario: Precision differential measurement of millivolt-level bridge outputs in load cells or pressure sensors. IC Role / Device Role / Timing Role: Core gain stage in 3-op-amp instrumentation topology using matched RES11A resistors. Use Value: 0.01% gain accuracy and >1014 Ω input resistance preserve bridge balance and minimize loading error. | Use Scenario: Converting nanoamp photocurrent from silicon photodiodes into measurable voltage. IC Role / Device Role / Timing Role: Transimpedance amplifier with ultra-high feedback resistance (>1 GΩ). Use Value: 10 fA input bias current prevents DC offset errors that would swamp pA-level photocurrents. |
| Medical Sensor Front-End | Piezoelectric Charge Amplifier |
Use Scenario: Biopotential acquisition (ECG, EEG) with dry or gel electrodes requiring high input impedance. IC Role / Device Role / Timing Role: First-stage noninverting buffer and active filter driver. Use Value: Input common-mode range including V– allows direct connection to electrode-sensed signals referenced to patient ground. | Use Scenario: Integrating charge from piezoelectric accelerometers or knock sensors in automotive/industrial monitoring. IC Role / Device Role / Timing Role: Low-drift integrator with guarded input and low-leakage feedback capacitor. Use Value: ±150 µV offset and <2.5 µV/°C drift ensure stable baseline over temperature in long-duration vibration analysis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC6064IMX | Micropower variant: 120 µA IQ per channel vs 750 µA for LMC6084AIM; GBW = 0.17 MHz; offset = 250 µV | Better suited for battery life-critical, low-bandwidth (<10 kHz) portable devices; lower speed limits use in fast pulse detection | Select LMC6064IMX only when quiescent current <150 µA is mandatory and bandwidth ≤100 kHz suffices. |
| OPA2182IDR | Zero-drift architecture: 0.003 µV/°C drift, 4 µV max offset; higher IQ (450 µA); 5.7 MHz GBW; SOIC-8 (dual only) | Requires two packages for quad functionality; superior DC stability but higher cost and layout complexity | Choose OPA2182IDR when µV-level drift over temperature is non-negotiable and dual-channel count is acceptable. |
Compared with LMC6064IMX and OPA2182IDR, the LMC6084AIM uniquely balances ultra-low input bias current (10 fA), rail-to-rail output, and 1.3 MHz bandwidth in a quad SOIC-14 - making it optimal for multi-channel, high-impedance, medium-speed sensor signal chains where leakage dominates error budgets.
Availability
LMC6084AIM is available at Aetrix Electronics and suitable for medical instrumentation, industrial transducer interfaces, and portable analytical equipment requiring stable component supply across extended production lifecycles.
Supply support for LMC6084AIM 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 for industrial, automotive, and personal electronics markets.
The LMC608x family was designed specifically for precision, low-power, high-input-impedance signal conditioning - targeting applications where input bias current, offset voltage, and single-supply rail-to-rail operation are primary constraints.
FAQ
What is the maximum recommended supply voltage for LMC6084AIM?
The absolute maximum supply voltage for LMC6084AIM is 16 V (single supply), but the recommended operating range is 4.5 V to 15.5 V. Operation above 15.5 V risks reliability degradation, especially when output is shorted to V+. The LMC6084AIM datasheet specifies derating above 13 V for sustained output short-circuit conditions to prevent junction overheating.
Does LMC6084AIM support true rail-to-rail input common-mode range?
The LMC6084AIM input common-mode range extends to V– (including ground in single-supply mode) but does not reach V+. Its upper limit is typically (V+) – 1.9 V at 25°C, degrading to (V+) – 2.5 V over –40°C to +85°C. Therefore, LMC6084AIM provides rail-to-rail *output* swing and *input-to-negative-rail* capability - not full rail-to-rail input.
Can LMC6084AIM drive capacitive loads directly?
The LMC6084AIM is not unity-gain stable with direct capacitive loads >100 pF. For loads >100 pF, TI recommends adding a series resistor (e.g., 50–200 Ω) between output and capacitance, or using a pull-up resistor to V+ (≥500 µA current) to improve phase margin. Figure 6-3 in the LMC6084AIM datasheet details this compensation method.
What is the thermal resistance (θJA) of LMC6084AIM in SOIC-14 package?
The junction-to-ambient thermal resistance (θJA) for LMC6084AIM in the D (SOIC-14) package is 126 °C/W, as specified in Section 5.6 of the LMC6084AIM datasheet. This value assumes standard JEDEC 2S2P board conditions; actual θJA may vary with PCB copper area and airflow.
Is LMC6084AIM pin-compatible with other LMC608x variants?
No - LMC6084AIM (SOIC-14, quad) is not pin-compatible with LMC6082 (SOIC-8, dual) or LMC6081 (SOIC-8, single). Each variant has distinct pin counts and layouts. The LMC6084AIM pinout is unique to its 14-pin configuration and cannot be substituted without PCB redesign.
LMC6084AIM 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 FAQ
1.How can I place an order for LMC6084AIM through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6084AIM 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 reliable?
The price and inventory of LMC6084AIM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6084AIM is usually 5 days.
3.What payment methods are accepted for LMC6084AIM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6084AIM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6084AIM?
LMC6084AIM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6084AIM 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?
For technical support, including LMC6084AIM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6084AIM requirements.
6.How does Aetrix verify that LMC6084AIM is sourced from the original manufacturer or authorized distributors?
All LMC6084AIM 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 meets industry standards.
7.What is the process for return or replacement of LMC6084AIM?
All LMC6084AIM units undergo pre-shipment inspection (PSI). If there is an issue with LMC6084AIM, 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 part is unused and in its original packaging.
Return procedure for LMC6084AIM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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