Texas Instruments LMV842QMMX/NOPB

Overview

LMV842QMMX/NOPB from Texas Instruments is a dual-channel, CMOS-input, rail-to-rail input/output (RRIO) operational amplifier optimized for high-impedance sensor interface and battery-powered instrumentation. It operates from 2.7 V to 12 V, delivers 4.5 MHz unity-gain bandwidth, draws only 1 mA per channel, and features 500 µV max input offset voltage and 0.3 pA input bias current - enabling precision signal conditioning in space-constrained industrial and portable systems.

For engineers reviewing the LMV842QMMX/NOPB datasheet, LMV842QMMX/NOPB pinout, LMV842QMMX/NOPB application, or LMV842QMMX/NOPB equivalent, key selection criteria include its VSSOP-8 package footprint, −40°C to +125°C operating range, low-noise (20 nV/√Hz) performance at 1 kHz, and guaranteed RRIO operation across full supply range - critical for DAC buffering, active filtering, and high-gain transducer amplification.

Technical Context

The LMV842QMMX/NOPB implements a CMOS input stage with anti-parallel ESD diodes limiting differential input voltage to ±300 mV, and supports single-supply (2.7–12 V) or split-supply (±5 V) operation. Its internal architecture delivers 133 dB open-loop gain and 112 dB CMRR at 25°C, with phase margin of 67° into 20 pF capacitive load - ensuring stable unity-gain buffer and active filter configurations.

Designed for low-power precision analog front-ends, it maintains rail-to-rail output swing within 32 mV of rails (at 10 kΩ load, 5 V supply) and exhibits <5 µV/°C input offset drift over temperature. Input common-mode range extends 0.2 V beyond both rails, enabling direct interfacing with high-impedance pH sensors, thermopiles, and bridge-based strain gauges without level-shifting circuitry.

Key Specifications

Pinout & Package

LMV842QMMX/NOPB is housed in an 8-pin VSSOP package (3.00 mm × 3.00 mm × 1.00 mm), optimized for thermal performance and PCB area efficiency in compact layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV9062IDGKR and OPA2333AIDR, LMV842QMMX/NOPB uniquely balances 4.5 MHz bandwidth, 1 mA/channel power, 125°C rating, and 0.3 pA input bias - making it optimal for dual-channel, wide-temperature, high-impedance sensor interfaces where both speed and precision matter.

Availability

LMV842QMMX/NOPB is available at Aetrix Electronics and suitable for industrial sensor modules, portable medical diagnostics, and automotive cabin air quality monitors requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for LMV842QMMX/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 sensor interface solutions.

The LMV84x family was designed specifically for low-power, high-accuracy signal conditioning in battery-operated and space-constrained systems - emphasizing rail-to-rail operation, CMOS input fidelity, and robustness across industrial and automotive temperature grades.

FAQ

What is the maximum capacitive load LMV842QMMX/NOPB can drive while maintaining stability?

The LMV842QMMX/NOPB is unity-gain stable with capacitive loads up to 100 pF, as confirmed by phase margin measurements of ≥67° in the datasheet. For loads exceeding 100 pF, a series resistor (≥10 Ω) between the output and capacitance is recommended to isolate the pole and preserve stability in DAC buffer or active filter applications using LMV842QMMX/NOPB.

Does LMV842QMMX/NOPB support true single-supply operation with input signals down to ground?

Yes. LMV842QMMX/NOPB features rail-to-rail input capability, allowing the common-mode input voltage to extend 0.2 V below V− (ground in single-supply mode). At 5 V supply, its input common-mode range spans −0.2 V to 5.2 V - enabling direct interface with grounded sensors and zero-referenced transducers without external level-shifting circuitry.

How does the input protection structure of LMV842QMMX/NOPB affect sensor interfacing?

LMV842QMMX/NOPB integrates anti-parallel ESD diodes between inputs, limiting differential input voltage to ±300 mV. When interfacing high-output-impedance sensors, external series resistors (e.g., 500 Ω) are recommended to prevent diode conduction during slewing or overvoltage events - preserving linearity and preventing current injection into sensitive sensor elements connected to LMV842QMMX/NOPB.

Can LMV842QMMX/NOPB be used in a dual-supply ±5 V configuration?

Yes. LMV842QMMX/NOPB is fully specified for ±5 V operation, with electrical characteristics including ±500 µV max input offset voltage, 133 dB open-loop gain, and rail-to-rail output swing measured under ±5 V conditions. Its CMRR remains ≥86 dB across the full common-mode range (−5 V to +5 V), making LMV842QMMX/NOPB suitable for legacy test equipment and bipolar signal chain designs.

What is the thermal performance of LMV842QMMX/NOPB in its VSSOP-8 package?

In the VSSOP-8 (DGK) package, LMV842QMMX/NOPB has a junction-to-ambient thermal resistance (R_θJA) of 179.2°C/W. At 1.5 mA per channel (12 mW total dissipation) and 25°C ambient, this results in a junction temperature rise of ~2.1°C - well within safe limits. For continuous operation at 125°C ambient, derating to ≤1.0 mA/channel is advised to maintain TJ < 150°C, as specified in the absolute maximum ratings of LMV842QMMX/NOPB.