Texas Instruments LMC6482IM

Overview

LMC6482IM 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, ultra-low 20 fA input bias current, rail-to-rail output swing within 20 mV of supply rails (at 100 kΩ load), and specified operation from 3 V to 15 V. It is widely deployed in data acquisition systems where full-supply-range input handling and high DC accuracy are critical.

For engineers reviewing the LMC6482IM datasheet, LMC6482IM pinout, LMC6482IM application, or LMC6482IM equivalent, key selection considerations include its rail-to-rail common-mode range extending 300 mV beyond supply rails, guaranteed performance at 3 V/5 V/15 V, 1.5 MHz gain-bandwidth product, 1.3 V/µs slew rate, and compatibility with 600 Ω loads - all essential for battery-powered instrumentation and medical sensor front-ends.

Technical Context

The LMC6482IM employs a complementary CMOS input stage enabling true rail-to-rail input operation with no phase inversion even when inputs exceed supply rails by up to 300 mV. Its output stage sustains rail-to-rail swing under 600 Ω loads while maintaining 82 dB CMRR and PSRR across temperature.

This architecture supports both single-supply (e.g., 3 V or 5 V) and split-supply (±7.5 V) configurations, with input offset voltage drift limited to ±1 µV/°C and input-referred voltage noise of 37 nV/√Hz at 1 kHz - making it suitable for high-resolution, low-drift analog front-ends in precision measurement.

Key Specifications

Pinout & Package

LMC6482IM is packaged in an 8-pin SOIC (D package), with industry-standard dual-op-amp pinout optimized for PCB layout reuse and drop-in replacement of legacy amplifiers like TLC272.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC272CDR and OPA2333AIDR, the LMC6482IM uniquely combines rail-to-rail input beyond supply rails, 20 fA input bias, and 1.5 MHz bandwidth at sub-1 mA per amplifier - delivering superior dynamic range and power efficiency for portable precision analog systems.

Availability

LMC6482IM is available at Aetrix Electronics and suitable for data acquisition, medical instrumentation, and portable test equipment requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.

Supply support for LMC6482IM 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 innovation in precision op-amps and signal-chain solutions.

The LMC648x family was engineered specifically for high-accuracy, low-power, rail-to-rail signal conditioning in battery-operated and single-supply industrial instrumentation - addressing limitations of earlier BiFET and bipolar op-amps in VCM range and input leakage.

FAQ

What supply voltage range does the LMC6482IM support?

The LMC6482IM operates from 3 V to 15 V total supply voltage (V+ to V−), with full electrical specifications guaranteed at 3 V, 5 V, and 15 V. It functions reliably in both single-supply (e.g., V− = 0 V, V+ = 3–15 V) and split-supply (e.g., ±7.5 V) configurations. The LMC6482IM maintains rail-to-rail input and output performance across this entire range, enabling flexible system-level power architecture design.

Does the LMC6482IM exhibit phase inversion when input voltages exceed the supply rails?

No, the LMC6482IM does not exhibit phase inversion when input voltages exceed the supply rails - a key advantage over many Bi-FET amplifiers. Its CMOS input stage allows input common-mode voltage to extend up to 300 mV beyond either rail (V− −0.3 V to V+ +0.3 V) without output polarity reversal. However, input currents must be externally limited to ±5 mA using series resistors if voltages exceed absolute maximum ratings, as specified in the LMC6482IM datasheet.

What is the maximum load the LMC6482IM can drive while maintaining rail-to-rail output swing?

The LMC6482IM maintains rail-to-rail output swing down to 600 Ω loads, with typical swing of 4.7 V high / 0.24 V low at 5 V supply and 600 Ω. At lighter loads (e.g., 2 kΩ), swing improves to 4.9 V high / 0.18 V low. This capability is explicitly characterized and guaranteed in the LMC6482IM datasheet, enabling direct interface with low-impedance ADC references, transmission lines, or active filters without external buffers.

How does the LMC6482IM compare to TLC272 in terms of input bias current and CMRR?

The LMC6482IM offers 20 fA maximum input bias current - five orders of magnitude lower than the TLC272's typical 10 pA - making it suitable for ultra-high-impedance sensor interfaces. Its CMRR is guaranteed at 82 dB (min 67 dB over temperature), significantly exceeding the TLC272's typical 70 dB and ensuring superior rejection of common-mode noise in precision measurement circuits using the LMC6482IM.

Is the LMC6482IM pin-compatible with standard dual op-amp packages?

Yes, the LMC6482IM in SOIC-8 (D package) uses the industry-standard dual-op-amp pinout defined in JEDEC MS-012, matching pin-for-pin the TLC272, LM358, and many other dual amplifiers. This enables drop-in replacement in existing layouts without PCB revision. The LMC6482IM pinout is validated per TI's SNOS674J datasheet Figure 4-1 and Table 4-1, confirming identical terminal mapping for OUT A, −IN A, +IN A, V−, +IN B, −IN B, OUT B, and V+.