Texas Instruments LMC6482AIM/NOPB

Overview

LMC6482AIM/NOPB from Texas Instruments is a dual-channel CMOS rail-to-rail input and output operational amplifier designed for precision signal conditioning in low-voltage, single-supply systems. It delivers 82 dB CMRR, ±0.75 mV max input offset voltage (25°C), 1.3 V/µs slew rate, and rail-to-rail output swing within 20 mV of supply rails into 100 kΩ - enabling high-accuracy data acquisition and sensor interfacing in battery-powered medical and industrial equipment.

For engineers reviewing the LMC6482AIM/NOPB datasheet, LMC6482AIM/NOPB pinout, LMC6482AIM/NOPB application, or LMC6482AIM/NOPB equivalent, key selection criteria include ultra-low 20 fA input bias current, guaranteed rail-to-rail operation at 3 V/5 V/15 V supplies, thermal stability across –40°C to +85°C, and compatibility with 600 Ω loads - critical for pH sensors, patient monitors, and metrology-grade DAQ front-ends.

Technical Context

The LMC6482AIM/NOPB employs a complementary CMOS input stage that extends common-mode voltage range 300 mV beyond both supply rails without phase inversion, unlike Bi-FET amplifiers. Its output stage maintains rail-to-rail swing even under 600 Ω load conditions, supporting wide dynamic range in single-supply configurations.

It achieves 82 dB CMRR and PSRR across 3 V–15 V supplies, with input offset drift limited to ±1 µV/°C (–40°C to +85°C). The device operates in dual- or single-supply mode and features 37 nV/√Hz input voltage noise at 1 kHz - optimized for low-frequency precision measurement chains requiring minimal DC error accumulation.

Key Specifications

Pinout & Package

LMC6482AIM/NOPB is packaged in an 8-pin SOIC (D package) with exposed pad not present; thermal resistance R_θJA = 128.9°C/W. Pin functions are electrically validated per TI SNOS674J Rev. September 2024.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision rail-to-rail op amp applications.

Compared with TLC272CP and OPA2333AIDR, the LMC6482AIM/NOPB offers uniquely low input bias current among non-zero-drift rail-to-rail op amps, enabling high-Z sensor interfacing without external guarding, while maintaining lower supply current than zero-drift alternatives for portable instrumentation.

Availability

LMC6482AIM/NOPB is available at Aetrix Electronics and suitable for medical patient monitoring, industrial process analytics, telecom rectifier feedback, and portable data acquisition systems requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for LMC6482AIM/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 heritage in precision op amp design and manufacturing.

The LMC648x family was engineered specifically for high-accuracy, low-power signal conditioning in single-supply industrial, medical, and test equipment - emphasizing rail-to-rail operation, ultra-low input current, and robust CMRR across voltage and temperature.

FAQ

What is the maximum supply voltage rating for LMC6482AIM/NOPB?

The absolute maximum supply voltage (V+ to V−) for LMC6482AIM/NOPB is 16 V, with recommended operating range from 3 V to 15.5 V. Exceeding 16 V risks permanent damage; operation above 13 V requires avoiding output short-circuit to V+ to maintain reliability. All electrical specifications in the datasheet are validated within the 3–15.5 V range, including rail-to-rail output swing and 82 dB CMRR.

Does LMC6482AIM/NOPB support true rail-to-rail input beyond the supply rails?

Yes, LMC6482AIM/NOPB supports input common-mode voltage from (V−) − 0.25 V to (V+) + 0.25 V at 25°C - extending 250 mV beyond both rails. This eliminates phase inversion seen in Bi-FET amplifiers and allows direct interfacing with overvoltage-safe sensors. At temperature extremes (–40°C to +85°C), the guaranteed range is (V−) to (V+), with slight degradation in offset voltage near rail edges.

Can LMC6482AIM/NOPB drive a 600 Ω load while maintaining rail-to-rail output swing?

Yes, LMC6482AIM/NOPB is explicitly specified for 600 Ω loads: at 5 V supply, it delivers ≥4.24 V high and ≤0.65 V low swing across temperature. At 15 V supply, swing is ≥13 V high and ≤1.3 V low. This capability enables direct driving of legacy instrumentation inputs, optocouplers, and low-impedance filters without external buffers - verified in Section 5.6 of the SNOS674J datasheet.

What is the input bias current specification for LMC6482AIM/NOPB over temperature?

LMC6482AIM/NOPB exhibits ≤4 pA maximum input bias current across –40°C to +85°C, with typical value of 20 fA at 25°C. This ultra-low current stems from its CMOS input stage and enables accurate interfacing with high-impedance sources such as pH electrodes, photodiodes, and piezoelectric sensors without significant voltage error or signal settling delay.

Is LMC6482AIM/NOPB pin-compatible with TLC272-based designs?

Yes, LMC6482AIM/NOPB uses the industry-standard 8-pin SOIC pinout of TLC272, allowing drop-in replacement in existing layouts. However, due to its rail-to-rail input/output capability and lower input bias current, system performance improves significantly - especially in low-voltage and high-impedance applications - without requiring PCB changes or schematic modifications.