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Texas Instruments LMC6484IM/NOPB
- Part No.:
- LMC6484IM/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMC6484IM/NOPB.pdf
- Description:
- IC CMOS 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,520
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Product details
Overview
LMC6484IM/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, 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 and medical instrumentation.
For engineers reviewing the LMC6484IM/NOPB datasheet, LMC6484IM/NOPB pinout, LMC6484IM/NOPB application, or LMC6484IM/NOPB equivalent, key selection criteria include ultra-low input current for high-impedance sensor interfaces, guaranteed rail-to-rail common-mode range extending beyond supply rails, thermal stability across –40°C to +85°C, and SOIC-14 package compatibility with legacy TLC27x-based layouts.
Technical Context
The LMC6484IM/NOPB uses a proprietary CMOS input stage that extends the common-mode voltage range to (V–) – 0.3 V and (V+) + 0.25 V while avoiding phase inversion - a critical advantage over Bi-FET amplifiers when handling overvoltage transients. Its output stage sustains rail-to-rail swing into 600 Ω loads, supporting wide dynamic range in low-voltage systems.
It operates from 3 V to 15.5 V single or dual supplies, draws only 0.625 mA per amplifier at 3 V, and maintains 74 dB CMRR at 3 V supply - making it suitable for battery-powered pH sensors, portable patient monitors, and industrial process analyzers where supply headroom and dc accuracy are constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 20 fA - enables direct interfacing with high-impedance sources (e.g., glass pH electrodes, piezoresistive sensors) without significant offset error. |
| CMRR | 82 dB (typ, VS = 5 V) - preserves linearity in 12-bit DAQ systems, limiting integral nonlinearity to ±0.325 LSB. |
| Rail-to-Rail Output Swing | Within 20 mV of rails (100 kΩ load); 0.37 V low / 2.5 V high (3 V supply, 600 Ω load) - maximizes usable dynamic range in single-supply systems. |
| Supply Voltage Range | 3 V to 15.5 V - supports both battery-powered (3 V) and industrial (±7.5 V or 15 V) configurations without redesign. |
| Input Offset Voltage | ±2 mV (max, TA = –40°C to +85°C, VS = 3 V) - ensures stable baseline in precision analog front-ends for gas or humidity sensing. |
| Slew Rate | 0.9 V/µs (VS = 3 V) - sufficient for <10 kHz small-signal conditioning in medical biosensors and analytical instruments. |
| Gain Bandwidth Product | 1 MHz (VS = 3 V) - enables stable unity-gain buffering and low-gain signal conditioning without excessive phase lag. |
Pinout & Package
LMC6484IM/NOPB is housed in a 14-pin SOIC (D package) with standard industry footprint and thermal characteristics: RθJA = 83.0 °C/W, RθJB = 42.4 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8, 14 | OUT A, OUT B, OUT C, OUT D | Amplifier output terminals - each drives independent signal paths; rail-to-rail swing supports full-scale ADC interfacing. |
| 2, 6, 9, 12 | −IN A, −IN B, −IN C, −IN D | Inverting inputs - accept differential or single-ended signals; immune to phase inversion beyond supply rails. |
| 3, 5, 10, 13 | +IN A, +IN B, +IN C, +IN D | Noninverting inputs - support high-Z sensor connections; 10 TΩ input resistance minimizes loading error. |
| 4 | V+ | Positive supply terminal - accepts 3–15.5 V; decoupling required near pin for stability in multi-channel operation. |
| 11 | V− | Negative supply terminal - tied to GND in single-supply mode; supports true dual-supply operation down to –15 V. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input common-mode range | Extends to (V−) − 0.3 V and (V+) + 0.25 V - eliminates need for level-shifting circuitry in wide-input-range DAQ front-ends. |
| Ultra-low input current (20 fA) | Reduces voltage error across >100 MΩ source impedances - critical for electrochemical sensors and photodiode transimpedance stages. |
| Specified performance at 3 V, 5 V, and 15 V | Enables drop-in replacement across portable, industrial, and test equipment platforms without recalibration or layout change. |
| 82 dB CMRR and PSRR | Maintains 12-bit accuracy in noisy environments (e.g., motor drives, power supplies) by rejecting supply and common-mode interference. |
| Guaranteed operation into 600 Ω loads | Supports direct driving of analog multiplexers, ADC reference buffers, and low-impedance transducers without external gain stages. |
Applications
| Data Acquisition (DAQ) | Currency Counter |
|---|---|
Use Scenario: Buffering high-impedance sensor outputs (e.g., thermocouples, strain gauges) into 12-bit SAR ADCs under 3 V battery power. IC Role / Device Role / Timing Role: Precision unity-gain buffer with rail-to-rail I/O, preserving full input dynamic range and minimizing offset drift. Use Value: Enables direct interface without scaling resistors or charge pumps - reducing BOM count and improving system SNR by >15 dB vs. TLC274. |
Use Scenario: Amplifying weak analog signals from optical currency validation sensors operating in variable ambient light conditions. IC Role / Device Role / Timing Role: Low-noise, high-CMRR preamplifier rejecting LED driver noise and EMI during high-speed bill scanning. Use Value: 82 dB PSRR suppresses switching noise from adjacent DC-DC converters, preventing false denomination detection. |
| Oscilloscope (DSO) | Multiparameter Patient Monitor |
Use Scenario: Input stage amplification in portable digital storage oscilloscopes requiring wide bandwidth and low distortion at ±5 V supplies. IC Role / Device Role / Timing Role: High-slew-rate (1.3 V/µs) gain stage with THD <0.01% - preserving fast edge fidelity in 10 kHz trigger paths. Use Value: Rail-to-rail output swing ensures full-scale display of ±5 V probe signals without clipping, even at elevated temperatures. |
Use Scenario: Signal conditioning for simultaneous ECG, SpO₂, and temperature channels in compact bedside monitors powered from 3.3 V rails. IC Role / Device Role / Timing Role: Quad-channel analog front-end providing isolated, low-drift amplification with <0.625 mA per channel quiescent current. Use Value: Ultra-low input current prevents electrode polarization errors in dry-contact ECG leads, improving diagnostic reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision 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× higher input bias current (5 pA), 5 V only. | Limited to mid-precision, fixed-supply industrial controls; cannot replace LMC6484IM/NOPB in battery-powered or wide-VCM designs. | Select only if cost sensitivity outweighs accuracy and supply flexibility requirements. |
| OPA2333AIDR | Zero-drift architecture, 0.1 µV/°C offset drift, but 500 nA input bias current and no extended common-mode range beyond rails. | Better for dc-critical applications (e.g., weigh scales), but unsuitable for overvoltage-tolerant sensor front-ends like pH or ion-selective electrodes. | Prefer for ultra-stable offset; avoid where input overvoltage immunity or sub-pA bias is mandatory. |
Compared with TLC277CP and OPA2333AIDR, LMC6484IM/NOPB uniquely combines sub-pA input current, rail-to-rail input beyond supply rails, and guaranteed 3–15 V operation - making it irreplaceable in portable analytical instruments and multi-supply industrial DAQ systems.
Availability
LMC6484IM/NOPB is available at Aetrix Electronics and suitable for data acquisition, medical instrumentation, industrial process analytics, and portable test equipment requiring stable component supply across long production lifecycles.
Supply support for LMC6484IM/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 LMC6484IM/NOPB belongs to TI's LMC648x family of rail-to-rail CMOS op amps, designed specifically for high-accuracy, low-power analog signal conditioning in battery-operated and industrial measurement systems.
FAQ
What is the maximum supply voltage for LMC6484IM/NOPB?
The absolute maximum supply voltage (VS = V+ – V−) for LMC6484IM/NOPB is 16 V. The recommended operating range is 3 V to 15.5 V. Exceeding 16 V risks permanent damage per Absolute Maximum Ratings in the datasheet. Operation at 15.5 V is validated for rail-to-rail output swing and CMRR performance.
Does LMC6484IM/NOPB support true single-supply operation?
Yes, LMC6484IM/NOPB fully supports true single-supply operation from 3 V to 15.5 V. Its rail-to-rail input extends to (V−) − 0.3 V and (V+) + 0.25 V, and output swings within 20 mV of both rails - enabling direct interfacing with unipolar ADCs and microcontroller inputs without level-shifting circuitry.
What is the input bias current specification for LMC6484IM/NOPB over temperature?
LMC6484IM/NOPB specifies input bias current of ±0.02 pA (±20 fA) at +25°C, and ±4 pA over the full –40°C to +85°C operating range. This ultra-low value remains stable across temperature, making LMC6484IM/NOPB ideal for high-impedance sensor interfaces where bias-induced offset must be minimized.
Can LMC6484IM/NOPB drive a 600 Ω load while maintaining rail-to-rail output swing?
Yes - LMC6484IM/NOPB is explicitly specified to maintain rail-to-rail output swing into 600 Ω loads. At 3 V supply, it delivers 0.37 V to 2.5 V swing; at 5 V, 0.3 V to 4.5 V swing; and at 15 V, 0.5 V to 13.4 V swing. This capability is verified across temperature and ensures compatibility with low-impedance analog switches and multiplexers.
Is LMC6484IM/NOPB pin-compatible with TLC274?
No - LMC6484IM/NOPB is not pin-compatible with TLC274. While both are quad op amps in 14-pin packages, their pinouts differ: TLC274 uses V− on pin 4 and V+ on pin 13, whereas LMC6484IM/NOPB places V+ on pin 4 and V− on pin 11. Layout adaptation is required, though the LMC6484IM/NOPB serves as a functional upgrade with superior specs.
LMC6484IM/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
LMC6484IM/NOPB FAQ
1.How can I place an order for LMC6484IM/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMC6484IM/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 LMC6484IM/NOPB reliable?
The price and inventory of LMC6484IM/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMC6484IM/NOPB is usually 5 days.
3.What payment methods are accepted for LMC6484IM/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMC6484IM/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMC6484IM/NOPB?
LMC6484IM/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMC6484IM/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 LMC6484IM/NOPB?
For technical support, including LMC6484IM/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMC6484IM/NOPB requirements.
6.How does Aetrix verify that LMC6484IM/NOPB is sourced from the original manufacturer or authorized distributors?
All LMC6484IM/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 LMC6484IM/NOPB meets industry standards.
7.What is the process for return or replacement of LMC6484IM/NOPB?
All LMC6484IM/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMC6484IM/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 LMC6484IM/NOPB part is unused and in its original packaging.
Return procedure for LMC6484IM/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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