Texas Instruments LMC6482AI MDA

Overview

LMC6482AIMDA from Texas Instruments is a dual-channel CMOS rail-to-rail input and output operational amplifier optimized for precision, low-power, single-supply operation. It delivers ±0.11 mV typical input offset voltage (25°C), 82 dB CMRR/PSRR, ultra-low 20 fA input bias current, rail-to-rail output swing within 20 mV of supply rails (100 kΩ load), and operates across 3 V to 15 V supply range - enabling high-accuracy signal conditioning in data acquisition systems.

For engineers reviewing the LMC6482AIMDA datasheet, LMC6482AIMDA pinout, LMC6482AIMDA application, or LMC6482AIMDA equivalent, key selection criteria include its verified rail-to-rail input common-mode range extending beyond both supply rails, guaranteed performance at 3 V/5 V/15 V, specified operation down to 600 Ω loads, low 0.7 mA per amplifier supply current, and compatibility with battery-powered and industrial sensor front-ends requiring wide dynamic range and minimal DC error.

Technical Context

The LMC6482AIMDA employs a proprietary CMOS rail-to-rail input stage that extends the common-mode voltage range to (V−) − 0.3 V and (V+) + 0.3 V while avoiding phase inversion - unlike Bi-FET amplifiers. Its output stage sustains rail-to-rail swing under 600 Ω loads, maintaining linearity critical for precision buffering and instrumentation circuits.

This dual op-amp integrates ultra-low input current (20 fA typ.) with high CMRR (82 dB) and PSRR (82 dB), enabling accurate amplification of high-impedance sensor signals (e.g., pH electrodes, gas sensors) without significant common-mode or supply-induced error - even in noisy industrial or medical environments.

Key Specifications

Pinout & Package

LMC6482AIMDA is packaged in an 8-pin SOIC (D package), with thermal resistance R_θJA = 128.9 °C/W and footprint compatible with industry-standard dual op-amp layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC272CDR and OPA2333AIDR, the LMC6482AIMDA uniquely combines rail-to-rail input/output, 20 fA bias, and 3–15.5 V operation - making it the only option among the three suitable for battery-powered pH meters, 15 V industrial DAQ front-ends, and dual-supply instrumentation where input overvoltage tolerance and zero-phase-inversion behavior are mandatory.

Availability

LMC6482AIMDA is available at Aetrix Electronics and suitable for data acquisition systems, medical instrumentation, industrial process analytics, and telecom power management requiring stable component supply across extended temperature and voltage ranges.

Supply support for LMC6482AIMDA 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 LMC6482AIMDA belongs to TI's LMC648x rail-to-rail CMOS op-amp family, designed specifically for high-accuracy, low-power, single-supply applications in sensor interfaces, medical devices, and industrial measurement systems.

FAQ

What is the maximum supply voltage for LMC6482AIMDA?

The LMC6482AIMDA has an absolute maximum supply voltage (V_S = V₊ − V₋) of 16 V, with recommended operating range from 3 V to 15.5 V. Operation at 15.5 V is fully characterized per datasheet Section 5.3, including output swing, CMRR, and supply current - making LMC6482AIMDA suitable for industrial 15 V analog rails without derating.

Does LMC6482AIMDA support true rail-to-rail input beyond the supply rails?

Yes, the LMC6482AIMDA features a rail-to-rail input stage with common-mode voltage range extending to (V₋) − 0.3 V and (V₊) + 0.3 V at room temperature. This allows input signals to exceed supply rails without phase inversion - a key advantage over Bi-FET amplifiers - and is explicitly verified in Figure 6-2 and Section 6.3.2 of the LMC6482AIMDA datasheet.

What load impedance can LMC6482AIMDA drive while maintaining rail-to-rail output swing?

The LMC6482AIMDA maintains rail-to-rail output swing down to 600 Ω loads at 5 V and 15 V supplies, as specified in Section 5.6 (VO parameter). At 5 V, swing is 4.5–4.7 V high and 0.3–0.5 V low into 600 Ω; at 15 V, swing is 13.4–14.1 V high and 0.5–1.0 V low - enabling direct driving of low-impedance DAC references or active filter stages without external buffers.

How does LMC6482AIMDA compare to TLC272 in terms of input bias current and common-mode range?

The LMC6482AIMDA offers 20 fA typical input bias current - five orders of magnitude lower than TLC272's 10 pA - and a rail-to-rail input common-mode range extending beyond both supply rails, whereas TLC272 is limited to 0–10 V. These differences make LMC6482AIMDA viable for pH electrodes and high-impedance sensors where TLC272 would introduce significant error or saturation.

Is LMC6482AIMDA pin-compatible with standard dual op-amp footprints?

Yes, LMC6482AIMDA uses the industry-standard 8-pin SOIC (D package) pinout defined in Table 4-1 of its datasheet: Pin 1 = OUT A, Pin 2 = −IN A, Pin 3 = +IN A, Pin 4 = V−, Pin 5 = +IN B, Pin 6 = −IN B, Pin 7 = OUT B, Pin 8 = V+. This matches legacy dual op-amps like TLC272, allowing drop-in replacement in existing PCB layouts without redesign.