Texas Instruments LMC6022IMX/NOPB

Overview

LMC6022IMX/NOPB from Texas Instruments is a low-power CMOS dual operational amplifier designed for high-impedance signal conditioning in single-supply (4.75–15.5 V) or split-supply systems. It delivers 120 dB voltage gain into 100 kΩ, ultra-low 40 fA input bias current, and rail-to-rail output swing down to V−, enabling precision current-to-voltage conversion and long-term integration in medical instrumentation and industrial controls.

For engineers reviewing the LMC6022IMX/NOPB datasheet, LMC6022IMX/NOPB pinout, LMC6022IMX/NOPB application, or LMC6022IMX/NOPB equivalent, key selection criteria include guaranteed 2.5 μV/°C offset drift, 0.11 V/μs slew rate at 15 V, micropower operation at 86 μA per amplifier, and validated stability with ≥500 Ω resistive loads - all critical for low-leakage sample-and-hold and photodiode preamplifier designs.

Technical Context

The LMC6022IMX/NOPB uses a nonstandard topology: output is taken directly from the integrator stage-not a unity-gain buffer-enabling rail-to-rail output swing while maintaining high open-loop gain. Its compound integrator includes dual feed-forward paths (C_f, C_ff) and a push-pull output stage capable of sourcing 40 mA and sinking 39 mA at 15 V.

This architecture yields asymmetric large-signal gain: 1000 V/mV sourcing into 5 kΩ (min 75 V/mV), and 1000 V/mV sinking into 5 kΩ (min 50 V/mV), with CMRR ≥63 dB over 0–12 V common-mode range and PSRR ≥61 dB on both supply rails - making it suitable for DC-coupled sensor interfaces where input bias current and offset stability dominate performance.

Key Specifications

Pinout & Package

LMC6022IMX/NOPB is housed in an 8-pin SOIC (D) package, 3.91 mm × 4.90 mm, 1.75 mm max height, RoHS-compliant with Sn lead finish and MSL Level-1 rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC27L2CDR and OPA2333AIDR, the LMC6022IMX/NOPB uniquely balances femtoampere input bias, rail-to-rail output, and micropower operation - making it irreplaceable in photodiode preamps and long-integration circuits where leakage-induced error must be minimized without sacrificing supply efficiency.

Availability

LMC6022IMX/NOPB is available at Aetrix Electronics and suitable for medical instrumentation, industrial sensor interfaces, and portable diagnostic equipment requiring stable component supply across extended production lifecycles.

Supply support for LMC6022IMX/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 low-power signal-chain solutions.

The LMC6022IMX/NOPB belongs to TI's legacy LMC-series CMOS op-amp family, engineered specifically for ultra-high-impedance, micropower applications where input bias current and offset stability are primary design constraints - not general-purpose amplification.

FAQ

What is the maximum capacitive load the LMC6022IMX/NOPB can drive without oscillation?

The LMC6022IMX/NOPB is unstable with purely capacitive loads above ~100 pF in unity-gain follower configuration. For reliable operation, add a 50–100 Ω series resistor at the output and a 5–10 pF capacitor from inverting input to output. With these components, stable operation is confirmed up to 1 nF. The LMC6022IMX/NOPB datasheet Figure 23 and Figure 25 provide measured stability boundaries versus load capacitance.

Does the LMC6022IMX/NOPB support true single-supply operation with inputs at ground?

Yes. The LMC6022IMX/NOPB input common-mode voltage range extends to V− (−0.1 V minimum at 5 V supply), allowing direct connection of grounded sensors or current-sense resistors without level-shifting circuitry. This capability is verified in the Electrical Characteristics table under "VCM Input Common-Mode Voltage Range" and confirmed in Figure 5 of the LMC6022IMX/NOPB datasheet.

What is the guaranteed output voltage swing for LMC6022IMX/NOPB at 5 V supply?

At V+ = 5 V and RL = 100 kΩ to 2.5 V, the LMC6022IMX/NOPB guarantees output swing from 0.09 V (min) to 4.40 V (min). At RL = 5 kΩ, swing is 0.35 V (min) to 4.00 V (min). These values are specified in the DC Electrical Characteristics table under "VO Output Voltage Swing" and apply across −40°C to +85°C junction temperature.

Can LMC6022IMX/NOPB replace bipolar op-amps in high-gain DC applications?

The LMC6022IMX/NOPB provides comparable large-signal voltage gain (≥100 V/mV into 5 kΩ) and superior input bias performance vs. bipolar equivalents, but its 2.5 μV/°C offset drift is higher than precision bipolar op-amps like OP27 (0.1 μV/°C). Use LMC6022IMX/NOPB where input leakage dominates error budget; choose bipolar alternatives only when sub-microvolt drift is mandatory and leakage is negligible.

Is LMC6022IMX/NOPB pin-compatible with other dual op-amps in SOIC-8?

LMC6022IMX/NOPB follows standard SOIC-8 pinout (dual op-amp, V− on Pin 4, V+ on Pin 8), matching industry conventions used by LM358, TL072, and OPA234. However, its ultra-low bias current and rail-to-rail output require layout adaptations (guard rings, clean PCB surfaces) not needed for those parts - so electrical compatibility does not imply drop-in replacement without validation.