Texas Instruments LMC6482AIM

Overview

LMC6482AIM 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 datasheet, LMC6482AIM pinout, LMC6482AIM application, or LMC6482AIM 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 performance in SOIC-8 (R_θJA = 128.9°C/W), and compatibility with 600 Ω loads - critical for pH sensors, patient monitors, and metro interconnect circuits.

Technical Context

The LMC6482AIM employs a complementary CMOS input stage that extends common-mode voltage range to 300 mV beyond both supply rails without phase inversion, unlike Bi-FET amplifiers. Its output stage maintains rail-to-rail swing down to 600 Ω loads while sustaining 82 dB PSRR and CMRR across –40°C to +85°C.

This architecture enables true linear operation over full supply range in single-supply configurations - essential for buffering 12-bit ADCs like ADC12038 without signal scaling, and for instrumentation amplifiers using matched resistor networks (e.g., RES11A-Q1) where CMRR directly determines system linearity (±0.325 LSB error at 82 dB).

Key Specifications

Pinout & Package

LMC6482AIM is packaged in an 8-pin SOIC (D package), with thermal resistance R_θJA = 128.9°C/W and footprint compatible with industry-standard op-amp layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC272CDR, LMC6482AIM enables true single-supply operation with 300 mV beyond-rail input tolerance and 40× lower input bias current - critical for electrochemical sensors. Versus OPA2333AIDR, LMC6482AIM reduces supply current by 96% while retaining rail-to-rail functionality, making it superior for multi-channel battery-powered devices.

Availability

LMC6482AIM is available at Aetrix Electronics and suitable for medical instrumentation, industrial sensor interfaces, data acquisition systems, and telecom power monitoring requiring stable component supply across extended temperature ranges (–40°C to +85°C).

Supply support for LMC6482AIM 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 over 50 years of op-amp innovation and broad industrial qualification.

The LMC6482AIM belongs to TI's precision CMOS op-amp product line, engineered specifically for rail-to-rail signal conditioning in low-voltage, high-impedance applications such as medical diagnostics, environmental sensing, and energy infrastructure monitoring.

FAQ

What is the maximum supply voltage for LMC6482AIM?

The LMC6482AIM has an absolute maximum supply voltage (V+ − V−) of 16 V, with recommended operating range from 3 V to 15.5 V. Operation at 15.5 V is fully specified for DC and AC parameters including CMRR, PSRR, and output swing - making LMC6482AIM suitable for industrial 12 V systems with headroom for transients.

Does LMC6482AIM support true rail-to-rail input at 3 V supply?

Yes, LMC6482AIM supports rail-to-rail input common-mode voltage from (V−) − 0.25 V to (V+) + 0.25 V at 3 V supply, with CMRR ≥ 50 dB across this range. This allows direct interfacing with 0–3 V sensor outputs without external level-shifting circuitry - a key advantage over legacy op-amps like TLC272.

Can LMC6482AIM drive 600 Ω loads while maintaining rail-to-rail output?

Yes, LMC6482AIM is explicitly specified to deliver rail-to-rail output swing into 600 Ω loads at 5 V and 15 V supplies. At 5 V, output swing is 4.24 V high / 0.65 V low over temperature - confirming usable dynamic range >3.5 V for driving analog inputs of SAR ADCs or analog switches.

What is the input bias current of LMC6482AIM and why does it matter?

LMC6482AIM has a typical input bias current of 20 fA, with ±4 pA maximum over temperature. This ultra-low value prevents voltage errors in high-impedance sensor circuits - for example, a 10 GΩ pH electrode sees <0.04 mV offset error, versus >40 mV with TLC272's 1 pA bias - directly preserving measurement accuracy.

Is LMC6482AIM pin-compatible with TLC272?

LMC6482AIM uses the same 8-pin SOIC (D) package and pinout as TLC272, enabling drop-in replacement in existing PCB layouts. However, LMC6482AIM adds rail-to-rail input/output capability, 40× lower input bias current, and guaranteed 3 V operation - delivering measurable performance upgrades without hardware changes.