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Texas Instruments LMC6484AIN/NOPB
- Part No.:
- LMC6484AIN/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
LMC6484AIN/NOPB.pdf
- Description:
- IC CMOS 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,046
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Product details
Overview
LMC6484AIN/NOPB from Texas Instruments is a quad CMOS rail-to-rail input and output operational amplifier optimized for precision, low-power, single-supply operation. It delivers 82 dB CMRR, ±20 fA input bias current, 1.5 MHz gain bandwidth, rail-to-rail output swing within 20 mV of rails (at 100 kΩ), and operates from 3 V to 15.5 V supply. It is used in high-accuracy data acquisition front-ends where full-supply-range signal handling and minimal input loading are critical.
For engineers reviewing the LMC6484AIN/NOPB datasheet, LMC6484AIN/NOPB pinout, LMC6484AIN/NOPB application, or LMC6484AIN/NOPB equivalent, key selection considerations include its ultra-low input current for high-impedance sensor interfacing, guaranteed rail-to-rail performance across temperature, compatibility with 600 Ω loads, and direct upgrade path from TLC277-based designs without layout changes.
Technical Context
The LMC6484AIN/NOPB employs a complementary CMOS input stage enabling true rail-to-rail common-mode voltage range - extending 300 mV beyond both supply rails - while avoiding phase inversion even when inputs exceed supplies. Its output stage sustains rail-to-rail swing under 600 Ω load, with sourcing/sinking capability up to ±30 mA per amplifier.
It features a high-precision architecture with 0.75 mV max input offset voltage (AI grade), ±1 µV/°C drift, and 37 nV/√Hz input voltage noise at 1 kHz. Specified for –40°C to +85°C junction temperature, it maintains 82 dB PSRR and CMRR across 3 V, 5 V, and 15 V operation - critical for battery-powered and industrial analog signal conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 15.5 V - supports single-supply portable systems and industrial 12–15 V rails without level-shifting. |
| Input Bias Current | ±0.02 pA typical - enables accurate amplification of signals from high-impedance sources (e.g., pH electrodes, piezoresistive sensors). |
| CMRR / PSRR | 82 dB minimum - preserves DC accuracy in noisy environments and rejects supply ripple in unregulated battery or rectifier-derived supplies. |
| Output Swing | Within 20 mV of rails (100 kΩ), 0.5 V from rails (600 Ω) - maximizes dynamic range in low-voltage ADC buffering applications. |
| Gain Bandwidth | 1.5 MHz - sufficient for anti-aliasing filters, sensor signal conditioning, and medium-speed DAQ channels up to ~100 kHz. |
| Slew Rate | 1.3 V/µs (15 V supply) - supports clean reproduction of 10 kHz sine waves at >2 VPP without distortion. |
| Input Offset Voltage | ±0.75 mV max (AI grade, 25°C) - ensures ≤0.325 LSB error in 12-bit data acquisition systems using 2.048 V reference. |
Pinout & Package
LMC6484AIN/NOPB is housed in a 14-pin plastic DIP (PDIP) package with 0.300-inch body width and through-hole mounting. Pin pitch is 0.100 inch; lead finish is matte tin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUT A/B/C/D | Amplifier output terminals - each drives independent load; rail-to-rail swing enables direct interface to SAR ADC references or low-voltage logic. |
| 2, 6, 9, 12 | −IN A/B/C/D | Inverting inputs - high-impedance CMOS nodes; require guarding in PCB layout for <1 pA leakage-critical applications. |
| 3, 5, 10, 13 | +IN A/B/C/D | Noninverting inputs - accept signals from –0.25 V to V+ + 0.25 V; tolerate overvoltage with external 10 kΩ current-limiting resistors. |
| 4 | V+ | Positive supply rail - must be decoupled with ≥0.1 µF ceramic capacitor close to pin for stability at high frequencies. |
| 11 | V− | Negative supply rail - tied to ground in single-supply configurations; supports dual-supply operation down to ±7.5 V. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends 300 mV beyond both supply rails - eliminates need for input signal attenuation or level-shifting in wide-dynamic-range sensors. |
| Ultra-low input bias current | 20 fA typical - reduces voltage error across 10 GΩ source impedances to <0.2 mV, critical for electrochemical and photodiode interfaces. |
| Guaranteed operation at 3 V, 5 V, 15 V | Full electrical specs validated across three standard supply points - simplifies design reuse across battery, USB, and industrial power domains. |
| High CMRR (82 dB) | Maintains 12-bit linearity in data acquisition - outperforms 50 dB alternatives that limit effective resolution to 8 bits. |
| 600 Ω load drive capability | Delivers rail-to-rail swing into low-impedance loads - supports driving coaxial cables, active filters with low-R feedback, or multiple parallel ADC inputs. |
Applications
| Medical Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Signal conditioning for multiparameter patient monitors measuring pH, blood gas, and transcutaneous O₂. IC Role / Device Role / Timing Role: Front-end buffer and differential amplifier for high-impedance electrochemical sensors operating from 3.3 V battery supply. Use Value: 20 fA input bias prevents electrode polarization drift; rail-to-rail input captures full sensor voltage range without clipping during transient events. |
Use Scenario: Analog front-end for 12-bit SAR ADC in portable environmental monitoring equipment. IC Role / Device Role / Timing Role: Unity-gain buffer isolating sensor outputs from ADC input capacitance while preserving DC accuracy. Use Value: 82 dB CMRR ensures ≤0.325 LSB integral nonlinearity error; 1.5 MHz GBW supports anti-aliasing filter cutoff at 100 kHz. |
| Industrial Process Analytics | Telecom Power Management |
Use Scenario: Precision amplification in pH and gas concentration analyzers deployed in chemical plants. IC Role / Device Role / Timing Role: Input stage of 3-op-amp instrumentation amplifier using RES11A matched resistor pairs. Use Value: Rail-to-rail input accommodates wide common-mode shifts from thermocouple or RTD bridges; low drift minimizes calibration frequency. |
Use Scenario: Voltage sensing and regulation feedback in merchant telecom rectifiers and three-phase UPS control boards. IC Role / Device Role / Timing Role: High-accuracy differential amplifier monitoring DC bus voltage and current shunt signals. Use Value: 15.5 V max supply rating matches 12 V nominal/15 V surge rails; 82 dB PSRR rejects switching noise from adjacent DC/DC converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad rail-to-rail op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC277CP | Higher input offset (±10 mV), no rail-to-rail input, 10 pA IB, 1.7 MHz GBW | Limited to mid-accuracy, higher-supply applications; cannot replace LMC6484AIN/NOPB in low-voltage or high-Z sensor circuits. | Select only if legacy footprint reuse is mandatory and rail-to-rail performance is not required. |
| TLV2464CDR | Lower supply range (2.7–6 V), 1.5 µA supply current per amp, 6.4 MHz GBW, 200 pA IB | Better speed and lower voltage operation, but 10× higher input current limits use with >1 MΩ sources. | Prefer for battery-powered, higher-bandwidth apps where sensor impedance <100 kΩ; avoid for pH/gas sensor front-ends. |
Compared with TLC277CP and TLV2464CDR, LMC6484AIN/NOPB uniquely combines femtoampere input bias, rail-to-rail input/output, and 3–15.5 V operation - making it irreplaceable in precision, wide-supply, high-impedance analog signal chains where DC accuracy and dynamic range are non-negotiable.
Availability
LMC6484AIN/NOPB is available at Aetrix Electronics and suitable for medical instrumentation, industrial process analytics, data acquisition systems, and telecom power management requiring stable component supply across long production lifecycles.
Supply support for LMC6484AIN/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 signal chain solutions.
The LMC648x family was designed specifically for high-accuracy, low-power, rail-to-rail analog signal conditioning in battery-operated and industrial measurement systems - emphasizing DC precision, wide supply flexibility, and robustness in real-world sensor interfaces.
FAQ
What is the maximum supply voltage for LMC6484AIN/NOPB?
The absolute maximum supply voltage (V+ to V−) for LMC6484AIN/NOPB is 16 V, with recommended operation up to 15.5 V. Exceeding 16 V risks permanent damage. At 15 V supply, it delivers rail-to-rail output swing down to 600 Ω loads and maintains 82 dB CMRR - critical for industrial 12 V systems with transient headroom.
Does LMC6484AIN/NOPB support true rail-to-rail input?
Yes, LMC6484AIN/NOPB supports true rail-to-rail input with common-mode voltage range extending 300 mV beyond both supply rails (e.g., –0.25 V to V+ + 0.25 V). Unlike many rail-to-rail op amps, it avoids phase inversion when inputs exceed supplies - verified in TI's Figure 6-2 - making it suitable for unbuffered sensor interfaces with unpredictable common-mode excursions.
What is the input bias current specification for LMC6484AIN/NOPB?
LMC6484AIN/NOPB has a typical input bias current of ±0.02 pA (20 fA) at 25°C, with ±4 pA maximum over –40°C to +85°C. This ultra-low value enables accurate amplification of signals from high-impedance sources such as pH electrodes, photodiodes, and piezoelectric sensors without significant voltage error or drift.
Can LMC6484AIN/NOPB drive a 600 Ω load while maintaining rail-to-rail output?
Yes, LMC6484AIN/NOPB is explicitly specified to maintain rail-to-rail output swing into 600 Ω loads - delivering 0.5 V from each rail at 5 V supply and 1.3 V from each rail at 15 V supply (over temperature). This capability supports driving low-impedance filters, coaxial cables, or multiple parallel ADC inputs without external buffers.
Is LMC6484AIN/NOPB a direct replacement for TLC277?
LMC6484AIN/NOPB is documented by Texas Instruments as an improved replacement for TLC277, offering rail-to-rail input/output, 20 fA vs 10 pA input bias, and superior CMRR (82 dB vs 70 dB). It uses industry-standard SOIC-14 and PDIP-14 footprints - LMC6484AIN/NOPB in PDIP-14 is pin-compatible with TLC277CP, enabling drop-in upgrades in existing designs without PCB changes.
LMC6484AIN/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1.3V/µs
- Gain Bandwidth Product:
- 1.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 0.02 pA
- Voltage - Input Offset:
- 110 µV
- Current - Supply:
- 2.6mA (x4 Channels)
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 3 V
- Voltage - Supply Span (Max):
- 15.5 V
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
LMC6484AIN/NOPB FAQ
1.How can I place an order for LMC6484AIN/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6484AIN/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 LMC6484AIN/NOPB reliable?
The price and inventory of LMC6484AIN/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6484AIN/NOPB is usually 5 days.
3.What payment methods are accepted for LMC6484AIN/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6484AIN/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6484AIN/NOPB?
LMC6484AIN/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6484AIN/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 LMC6484AIN/NOPB?
For technical support, including LMC6484AIN/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6484AIN/NOPB requirements.
6.How does Aetrix verify that LMC6484AIN/NOPB is sourced from the original manufacturer or authorized distributors?
All LMC6484AIN/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 LMC6484AIN/NOPB meets industry standards.
7.What is the process for return or replacement of LMC6484AIN/NOPB?
All LMC6484AIN/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMC6484AIN/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 LMC6484AIN/NOPB part is unused and in its original packaging.
Return procedure for LMC6484AIN/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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