Texas Instruments LMV881LEX/NOPB

Overview

LMV881LEX/NOPB from Texas Instruments is a 23 MHz, rail-to-rail output CMOS operational amplifier with EMI hardening, 1.8 V logic-compatible shutdown, 1.65 mA supply current, and 1 mV max input offset voltage - designed for precision sensor signal conditioning in noisy RF environments such as medical diagnosis equipment and weight scale systems.

For engineers reviewing the LMV881LEX/NOPB datasheet, LMV881LEX/NOPB pinout, LMV881LEX/NOPB application, or LMV881LEX/NOPB equivalent, key selection criteria include EMI rejection ratio (105 dB at 1.8 GHz), shutdown current (200 pA), input bias current (0.1 pA), rail-to-rail output swing (≤5 mV from rails), and µUQFN-6 package compatibility with space-constrained PCB layouts.

Technical Context

The LMV881LEX/NOPB employs a CMOS input stage enabling ultra-low input bias current (0.1 pA) and wide input common-mode range (down to −0.2 V at 3.3 V supply). Its internal EMI hardening architecture suppresses RF-induced offset shifts via optimized input-stage layout and filtering, delivering 105 dB EMIRR at 1.8 GHz without external components.

It integrates a dedicated 1.8 V logic-level shutdown control pin referenced to V−, enabling direct interface with low-voltage microcontrollers. During shutdown, the output is actively clamped to V− with <10 Ω resistance, ensuring predictable state in battery-powered systems.

Key Specifications

Pinout & Package

LMV881LEX/NOPB is housed in a 6-pin micro-UQFN package (1.5 mm × 1.0 mm × 0.5 mm, package code NKK0006A), optimized for minimal PCB footprint and thermal performance in dense layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar operational amplifier applications.

Compared with LMV882DRX/NOPB and OPA333AIDBVR, LMV881LEX/NOPB uniquely balances 23 MHz bandwidth, 105 dB EMI rejection, and 0.1 pA input bias in a 1.5×1.0 mm package - making it optimal for single-channel, RF-immune, battery-operated signal chains where size and noise robustness are co-primary constraints.

Availability

LMV881LEX/NOPB is available at Aetrix Electronics and suitable for medical diagnosis equipment, weight scale systems, portable electronics filters/buffers, and power line monitors requiring stable component supply across industrial temperature ranges and long production lifecycles.

Supply support for LMV881LEX/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, embedded processing, and connectivity technologies, with decades of op amp innovation and automotive-grade reliability validation.

The LMV881LEX/NOPB belongs to TI's EMI-hardened precision op amp product line, engineered specifically for sensor signal conditioning in RF-hostile environments like portable medical devices and industrial IoT edge nodes.

FAQ

What is the maximum capacitive load the LMV881LEX/NOPB can drive without external compensation?

The LMV881LEX/NOPB is unity-gain stable and can directly drive capacitive loads up to 200 pF without oscillation or peaking. This capability supports direct interfacing with ADC input capacitors, long PCB traces, and RC anti-aliasing filters. For loads exceeding 200 pF, a series isolation resistor (e.g., 50 Ω) between the LMV881LEX/NOPB output and the load restores stability while preserving signal fidelity.

Does the LMV881LEX/NOPB require external level-shifting circuitry to interface with 1.8 V microcontrollers?

No - the LMV881LEX/NOPB shutdown pin (SD) has fixed 1.8 V logic thresholds referenced to V−, enabling direct connection to 1.8 V GPIOs without level shifters. The turn-on threshold is ≥1.0 V and turn-off threshold is ≤0.7 V, ensuring reliable activation/deactivation across all valid supply voltages (2.7–5.5 V). Leaving SD floating is prohibited and will cause undefined behavior.

How does the EMI hardening of the LMV881LEX/NOPB improve performance in real-world RF environments?

The LMV881LEX/NOPB achieves 105 dB EMI rejection ratio (EMIRR) at 1.8 GHz by integrating layout-level RF suppression and input-stage filtering, reducing RF-induced input offset voltage shifts to sub-microvolt levels. In practice, this eliminates visible 2.4 GHz Wi-Fi or LTE carrier artifacts on oscilloscope outputs and maintains ADC effective resolution in proximity to wireless transceivers - verified per JEDEC JESD22-C101-C test methods.

What is the guaranteed input common-mode voltage range for the LMV881LEX/NOPB at 3.3 V supply?

At V+ = 3.3 V, the LMV881LEX/NOPB guarantees an input common-mode voltage range of −0.2 V to 2.2 V while maintaining CMRR ≥65 dB. This includes ground and extends 0.2 V below it, enabling true single-supply operation with sensors that output negative-going transients. The range expands to −0.2 V to 3.8 V at 5 V supply, supporting wider signal excursions in industrial applications.

Can the LMV881LEX/NOPB operate from a 2.7 V supply while delivering full rail-to-rail output swing?

Yes - the LMV881LEX/NOPB is fully specified from 2.7 V to 5.5 V. At 2.7 V supply, it delivers rail-to-rail output swing within 5 mV of V+ and V− under 10 kΩ load, with 1.65 mA supply current and 23 MHz GBW maintained. Output drive remains robust (≥61 mA sourcing), and PSRR exceeds 79 dB, ensuring stable performance in low-voltage battery-powered systems.