Texas Instruments LMC6482IM/NOPB

Overview

LMC6482IM/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, ±20 fA input bias current, 1.5 MHz gain bandwidth, and rail-to-rail output swing within 20 mV of supply rails into 100 kΩ - enabling high-accuracy data acquisition, medical sensor front-ends, and battery-powered instrumentation.

For engineers reviewing the LMC6482IM/NOPB datasheet, LMC6482IM/NOPB pinout, LMC6482IM/NOPB application, or LMC6482IM/NOPB equivalent, key selection criteria include ultra-low input current for high-impedance source interfacing, guaranteed rail-to-rail operation at 3 V/5 V/15 V, thermal performance in SOIC-8 (R_θJA = 128.9 °C/W), and compatibility with legacy TLC272-based designs requiring improved common-mode range and accuracy.

Technical Context

The LMC6482IM/NOPB employs a complementary CMOS input stage that extends the input common-mode voltage range to 300 mV beyond both supply rails - eliminating phase inversion when inputs exceed V– or approach V+, unlike Bi-FET amplifiers. Its output stage sustains rail-to-rail swing into loads as low as 600 Ω while maintaining 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, supporting high-fidelity buffering of ADC inputs (e.g., ADC12038), precision instrumentation amplifiers using matched resistor networks (e.g., RES11A series), and low-drift transducer signal chains where input bias current < 0.02 pA minimizes error in high-Z pH/gas/concentration sensors.

Key Specifications

Pinout & Package

LMC6482IM/NOPB is packaged in an 8-pin SOIC (D package) with standard industry pinout compatible with TLC272 and other dual op-amps. The package provides adequate thermal dissipation (R_θJA = 128.9 °C/W) for ambient temperatures up to +85°C in typical PCB layouts with 2 oz copper.

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 TLC272CDR and OPA2333AIDR, LMC6482IM/NOPB uniquely balances rail-to-rail I/O, ultra-low bias current, 3–15.5 V operation, and 600 Ω drive - making it optimal for cost-sensitive, wide-supply industrial and medical signal chains where zero-drift isn't mandatory but extended dynamic range is.

Availability

LMC6482IM/NOPB 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 automotive, industrial, and medical OEM programs.

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

LMC6482IM/NOPB belongs to TI's LMC648x family of rail-to-rail CMOS op-amps engineered for high-accuracy, low-power signal conditioning in battery-operated and industrial measurement systems - emphasizing input bias current, common-mode range, and supply flexibility.

FAQ

What is the maximum supply voltage for LMC6482IM/NOPB?

The absolute maximum supply voltage (V+ − V−) for LMC6482IM/NOPB is 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, supporting industrial 12 V and telecom 15 V rails while maintaining rail-to-rail output swing and 82 dB CMRR.

Does LMC6482IM/NOPB support true rail-to-rail input beyond the supply rails?

Yes - LMC6482IM/NOPB features a CMOS input stage that allows input common-mode voltage to extend 300 mV beyond both V− and V+, enabling operation with inputs up to (V− − 0.25 V) and (V+ + 0.25 V) without phase inversion or clipping, as verified in Figure 6-1 and Section 6.3.2 of the datasheet.

Can LMC6482IM/NOPB drive a 600 Ω load while maintaining rail-to-rail output?

Yes - LMC6482IM/NOPB is explicitly specified for 600 Ω loads in Section 5.6: at V+ = 5 V, output swing is 4.24 V (high) and 0.65 V (low); at V+ = 15 V, swing is 13 V (high) and 1.3 V (low). This capability enables direct interfacing with low-impedance analog multiplexers and transmission lines without external buffers.

How does LMC6482IM/NOPB compare to TLC272 in terms of input bias current?

LMC6482IM/NOPB delivers ±0.02 pA typical input bias current - over 10⁶× lower than TLC272's ±100 pA - reducing voltage error across high-impedance sources (e.g., 10 GΩ pH electrodes) from millivolts to sub-microvolts, directly improving measurement accuracy and long-term stability in analytical instruments.

Is LMC6482IM/NOPB pin-compatible with TLC272?

Yes - LMC6482IM/NOPB uses the industry-standard 8-pin SOIC (D) pinout matching TLC272, TLC277, and other dual op-amps. Pin functions (OUT A, −IN A, +IN A, V−, +IN B, −IN B, OUT B, V+) are identical, enabling drop-in replacement in existing PCB layouts without redesign.