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Texas Instruments LMC6484AIMX
- Part No.:
- LMC6484AIMX
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC6484AIMX.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,521
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Product details
Overview
LMC6484AIMX from Texas Instruments is a quad-channel CMOS rail-to-rail input and output operational amplifier optimized for precision, low-power, single-supply operation. It delivers 82 dB CMRR and PSRR, 20 fA ultra-low input bias current, rail-to-rail output swing within 20 mV of supply rails (at 100 kΩ load), and specified performance at 3 V, 5 V, and 15 V supplies - enabling high-accuracy signal conditioning in data acquisition systems and battery-powered medical instrumentation.
For engineers reviewing the LMC6484AIMX datasheet, LMC6484AIMX pinout, LMC6484AIMX application, or LMC6484AIMX equivalent, key selection criteria include its guaranteed rail-to-rail input common-mode range extending beyond both supply rails, low-voltage 3 V operation with 0.2–0.6 V output swing headroom at 600 Ω load, thermal performance in SOIC-14 (RθJA = 83.0 °C/W), and compatibility with legacy TLC27x designs requiring upgrade paths without layout changes.
Technical Context
The LMC6484AIMX employs a complementary CMOS input stage that enables true rail-to-rail input operation - with common-mode voltage range extending 300 mV beyond either supply rail - while avoiding phase inversion when inputs exceed supply limits. Its output stage sustains rail-to-rail swing down to 600 Ω loads, maintaining linearity across temperature (–40°C to +85°C) and supply voltages (3–15.5 V).
This architecture supports high-precision DC-coupled applications such as instrumentation amplifiers and sensor front-ends, where 82 dB CMRR preserves 12-bit ADC integral linearity (±0.325 LSB), and ultra-low 20 fA input current minimizes leakage-induced errors in high-impedance pH/gas sensor interfaces and electrophysiological monitoring circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3 V to 15.5 V - supports single-supply battery operation and industrial 12/15 V rails without level-shifting. |
| Input Offset Voltage (TA = 25°C) | ±0.75 mV max - ensures <±0.325 LSB error in 12-bit DAQ systems referenced to 2.5 V. |
| CMRR / PSRR | 82 dB - maintains accuracy under varying supply noise and common-mode interference in noisy environments. |
| Input Bias Current | 20 fA - enables stable DC coupling to >10 GΩ sensor sources (e.g., glass pH electrodes, piezoresistive transducers). |
| Output Swing (5 V, 600 Ω) | 0.3–4.7 V - delivers full dynamic range into moderate loads without external boost circuitry. |
| Slew Rate | 1.3 V/µs - supports bandwidth-limited signal conditioning up to ~100 kHz for pulse and step responses. |
| Gain Bandwidth Product | 1.5 MHz - sufficient for closed-loop gains up to 150× at DC–10 kHz with stable phase margin (50°). |
Pinout & Package
LMC6484AIMX is packaged in a 14-pin SOIC (D package), with 1.27 mm pitch, 8.65 mm × 3.91 mm body, and JEDEC MS-012AC compliant footprint. Thermal resistance is RθJA = 83.0 °C/W, suitable for ambient temperatures up to +85°C with standard PCB copper pour.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUT A–D | Amplifier output terminals - each drives independent loads; rail-to-rail swing enables direct interface to SAR ADC references. |
| 2, 6, 9, 12 | −IN A–D | Inverting inputs - matched to +IN pins; support differential configurations and active filtering without external bias networks. |
| 3, 5, 10, 13 | +IN A–D | Noninverting inputs - accept signals from 0 V to V+ + 0.25 V; enable single-supply sensor buffering with no level shift. |
| 4 | V+ | Positive supply - accepts 3–15.5 V; decoupling required within 1 cm for stability at high frequencies. |
| 11 | V− | Negative supply - grounded in single-supply mode; supports dual-supply operation down to –15 V. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends 300 mV beyond both supply rails - eliminates need for input clamping or level-shifting in wide-dynamic-range sensors. |
| Rail-to-rail output swing | Within 20 mV of rails at 100 kΩ; 0.3–4.7 V at 5 V/600 Ω - maximizes usable ADC input range in portable equipment. |
| Ultra-low input bias current | 20 fA - reduces voltage error across 10 MΩ source impedances to <0.2 µV, critical for electrochemical and capacitive sensing. |
| Specified 3 V, 5 V, and 15 V operation | Guaranteed performance across battery, USB, and industrial power domains - simplifies BOM consolidation. |
| High CMRR and PSRR (82 dB) | Maintains 12-bit linearity in noisy industrial settings - outperforms typical rail-to-rail op-amps (50–65 dB) by >15 dB. |
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 ion-selective electrodes and Clark-type sensors. Use Value: 20 fA input bias prevents electrode polarization drift; rail-to-rail input captures full sensor output swing without clipping. |
Use Scenario: Analog front-end for 12-bit SAR ADCs in portable test equipment and environmental loggers. IC Role / Device Role / Timing Role: Precision unity-gain buffer isolating sensor outputs from ADC input capacitance. Use Value: 82 dB CMRR preserves ±0.325 LSB integral linearity; 3 V operation extends battery life in handheld DAQ units. |
| Industrial Process Analytics | Telecom Power Management |
Use Scenario: Signal conditioning in pH meters, gas analyzers, and humidity sensors deployed in factory-floor control cabinets. 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 offsets from 4–20 mA loop receivers; low drift ensures calibration stability over temperature. |
Use Scenario: Voltage monitoring and feedback control in merchant telecom rectifiers and three-phase UPS systems. IC Role / Device Role / Timing Role: Precision comparator input buffer and isolated reference scaling amplifier. Use Value: 15.5 V absolute max supply rating supports direct connection to 12 V bus rails; 600 Ω drive capability interfaces with optocoupler inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision rail-to-rail operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMC6484IMX | Wider input offset voltage (±3 mV vs. ±0.75 mV) and lower CMRR (62 dB vs. 82 dB) at temperature extremes. | Acceptable for cost-sensitive industrial controls where 10-bit accuracy suffices; not recommended for medical-grade DAQ. | Select LMC6484AIMX when sub-mV offset and stable CMRR over –40°C to +85°C are required. |
| TLC277CDR | Non-rail-to-rail input (VCM = 1.5–3.5 V at 5 V), higher input bias current (1 pA), and no 3 V specification. | Limited to mid-supply-swing applications; requires external biasing for single-supply sensor interfaces. | Choose LMC6484AIMX to eliminate input bias networks and extend dynamic range in low-voltage systems. |
Compared with LMC6484IMX and TLC277CDR, the LMC6484AIMX provides superior DC precision, wider input common-mode range, and verified 3 V operation - making it the only option among the three qualified for battery-powered medical instrumentation and high-resolution DAQ where rail-to-rail signal capture is mandatory.
Availability
LMC6484AIMX 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 extended temperature ranges and long production lifecycles.
Supply support for LMC6484AIMX 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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers, data converters, and power management ICs.
The LMC6484AIMX belongs to TI's LMC648x family of rail-to-rail CMOS op-amps, designed specifically for high-accuracy, low-power signal conditioning in battery-operated and industrial measurement systems where input/output voltage headroom is constrained.
FAQ
What is the maximum supply voltage for LMC6484AIMX?
The LMC6484AIMX has an absolute maximum supply voltage (VS = V+ – V−) of 16 V. The recommended operating range is 3 V to 15.5 V. Exceeding 16 V risks permanent damage; operation above 13 V with output shorted to V+ degrades reliability per TI's datasheet warning. The LMC6484AIMX must be operated within these limits to ensure long-term stability and parametric compliance.
Does LMC6484AIMX support true rail-to-rail input operation?
Yes, the LMC6484AIMX supports true rail-to-rail input operation with a common-mode voltage range extending 300 mV beyond both supply rails (e.g., –0.3 V to V+ + 0.3 V at room temperature). This eliminates phase inversion when inputs exceed supply limits and enables direct interfacing with unconditioned sensor outputs - a capability confirmed in Section 6.3.2 of the official datasheet and validated in Figure 6-2.
What is the output drive capability of LMC6484AIMX at 5 V supply?
At VS = 5 V, the LMC6484AIMX delivers rail-to-rail output swing: 0.1–4.9 V into 2 kΩ and 0.3–4.7 V into 600 Ω loads. Short-circuit current is 16–20 mA (sourcing) and 11–15 mA (sinking). These values are measured per TI's datasheet Section 5.6 and define usable dynamic range for driving ADC references, LED drivers, or optocouplers without external buffers.
How does LMC6484AIMX compare to TLC277 in terms of upgrade path?
The LMC6484AIMX is explicitly positioned as an improved replacement for TLC277, offering rail-to-rail input/output, 20 fA vs. 1 pA input bias current, and 82 dB vs. ~65 dB CMRR. Its industry-standard SOIC-14 pinout allows drop-in replacement in many TLC277 layouts, though designers must verify supply decoupling and load drive requirements due to higher output current capability in the LMC6484AIMX.
Is LMC6484AIMX suitable for 3 V battery-powered applications?
Yes, the LMC6484AIMX is fully specified at 3 V supply, delivering 2.5–2.7 V high-side and 0.37–0.6 V low-side output swing into 600 Ω, 0.9 mA max supply current per amplifier, and 74 dB CMRR. These parameters - documented in Section 5.7 of the datasheet - confirm suitability for portable medical devices, handheld analyzers, and IoT edge sensors powered by single-cell Li-ion or alkaline batteries.
LMC6484AIMX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
LMC6484AIMX FAQ
1.How can I place an order for LMC6484AIMX through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6484AIMX 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 LMC6484AIMX reliable?
The price and inventory of LMC6484AIMX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6484AIMX is usually 5 days.
3.What payment methods are accepted for LMC6484AIMX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6484AIMX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6484AIMX?
LMC6484AIMX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6484AIMX 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 LMC6484AIMX?
For technical support, including LMC6484AIMX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6484AIMX requirements.
6.How does Aetrix verify that LMC6484AIMX is sourced from the original manufacturer or authorized distributors?
All LMC6484AIMX 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 LMC6484AIMX meets industry standards.
7.What is the process for return or replacement of LMC6484AIMX?
All LMC6484AIMX units undergo pre-shipment inspection (PSI). If there is an issue with LMC6484AIMX, 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 LMC6484AIMX part is unused and in its original packaging.
Return procedure for LMC6484AIMX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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