Texas Instruments LMC6482IMM

Overview

LMC6482IMM 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 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 systems.

For engineers reviewing the LMC6482IMM datasheet, LMC6482IMM pinout, LMC6482IMM application, or LMC6482IMM equivalent, this page provides verified technical context, real-world use cases, validated alternatives, and supply-chain support details specific to the LMC6482IMM in VSSOP-8 packaging.

Technical Context

The LMC6482IMM employs a complementary CMOS input stage that extends the common-mode voltage range 300 mV beyond both supply rails without phase inversion, unlike Bi-FET amplifiers. Its output stage sustains rail-to-rail swing down to 600 Ω loads while maintaining 82 dB PSRR and 82 dB CMRR across temperature.

This architecture enables full-scale signal handling in single-supply systems - e.g., buffering 12-bit ADCs like the ADC12038 without input scaling - while preserving integral linearity to ±0.325 LSB. The device operates over –40°C to +85°C with 0.7 mA per amplifier supply current at 5 V.

Key Specifications

Pinout & Package

LMC6482IMM is packaged in an 8-pin VSSOP (DGK) with 0.65 mm pitch, 3.0 mm × 3.0 mm body, and exposed thermal pad (non-electrical). This thermally enhanced package supports junction-to-board resistance of 91.2 °C/W, enabling reliable operation up to 85°C ambient in compact layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV2462IDR and OPA2333AIDR, the LMC6482IMM uniquely balances ultra-low input current (20 fA), 82 dB CMRR, and 0.7 mA supply current - making it optimal for portable, high-accuracy, single-supply instrumentation where leakage and noise rejection dominate design constraints.

Availability

LMC6482IMM is available at Aetrix Electronics and suitable for data acquisition systems, medical patient monitors, and portable test equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for LMC6482IMM 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 LMC6482IMM belongs to TI's LMC648x rail-to-rail CMOS op amp family, designed specifically for high-accuracy, low-power, single-supply applications in instrumentation, medical devices, and industrial sensing.

FAQ

What is the maximum supply voltage for LMC6482IMM?

The LMC6482IMM supports a recommended operating supply voltage range of 3 V to 15.5 V. Absolute maximum supply voltage is 16 V. Operation above 15.5 V risks reliability degradation, especially when output is shorted to V+ above 13 V - a condition explicitly cautioned in the datasheet.

Does LMC6482IMM support true rail-to-rail input beyond the supply rails?

Yes. The LMC6482IMM input common-mode voltage range extends 300 mV beyond both V+ and V− rails (e.g., from –0.3 V to 5.3 V at 5 V supply), with no phase inversion - a key differentiator from Bi-FET amplifiers. This allows direct interfacing with overvoltage-safe sensors without external clamping.

What is the output drive capability of LMC6482IMM at 3 V supply?

At 3 V supply, the LMC6482IMM delivers rail-to-rail output swing: 2.8 V high and 0.2 V low into 2 kΩ, and 2.7 V high and 0.6 V low into 600 Ω. This enables full utilization of 3 V ADC references while driving moderate loads typical in portable instrumentation.

How does LMC6482IMM compare to TLC272 in upgrade scenarios?

The LMC6482IMM is documented as an improved replacement for TLC272, offering rail-to-rail I/O (vs. limited common-mode range), 20 fA vs. 1 pA input bias current, and 82 dB vs. ~65 dB CMRR. These improvements eliminate phase inversion in DAQ front-ends and improve 12-bit system linearity without layout changes.

Is thermal performance of LMC6482IMM validated for VSSOP-8 package?

Yes. The LMC6482IMM in DGK (VSSOP-8) package has characterized thermal metrics: RθJA = 169.5 °C/W, RθJB = 91.2 °C/W, and ψJB = 89.6 °C/W. These values are measured per JEDEC standards and confirm suitability for continuous operation at 85°C ambient in properly laid-out PCBs with thermal vias.