Texas Instruments LMV842QMM/NOPB

Overview

LMV842QMM/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 LMV842QMM/NOPB datasheet, LMV842QMM/NOPB pinout, LMV842QMM/NOPB application, or LMV842QMM/NOPB equivalent, key selection criteria include its RRIO swing at low supply voltages, ultra-low input bias current for photodiode/bridge sensor buffering, wide temperature range (−40°C to +125°C), and qualification for automotive-grade applications (Q suffix).

Technical Context

The LMV842QMM/NOPB implements a CMOS input stage with anti-parallel ESD diodes limiting differential input voltage to ±300 mV, and a fully complementary output stage supporting rail-to-rail swing within 32–100 mV of either rail (depending on load and supply). Its 133 dB open-loop gain and 112 dB CMRR ensure stable high-gain configurations in noisy environments.

Designed for single-supply operation down to 2.7 V, it maintains specified performance at 3.3 V, 5 V, and ±5 V supplies. The device's 20 nV/√Hz input voltage noise and 2.5 V/µs slew rate support accurate amplification of low-level, wideband sensor signals without distortion.

Key Specifications

Pinout & Package

LMV842QMM/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 designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMV842IDR and TLV9062IDSGR, LMV842QMM/NOPB uniquely balances automotive qualification, ultra-low input bias current, and VSSOP thermal efficiency - making it optimal for space- and reliability-critical sensor nodes where pA-level leakage and 125°C operation are non-negotiable.

Availability

LMV842QMM/NOPB is available at Aetrix Electronics and suitable for medical patient monitoring, industrial bridge sensor interface, battery-powered gas detection, and automotive cabin air quality sensing requiring stable component supply across long product lifecycles.

Supply support for LMV842QMM/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 over 90 years of innovation in precision signal chain solutions.

The LMV84x family was designed specifically for high-impedance, low-power sensor signal conditioning in automotive, industrial, and portable medical equipment - emphasizing rail-to-rail operation, picoampere input bias, and extended temperature reliability.

FAQ

What is the maximum differential input voltage allowed for LMV842QMM/NOPB?

The LMV842QMM/NOPB specifies an absolute maximum differential input voltage of ±300 mV, enforced by internal anti-parallel ESD diodes. Exceeding this risks forward-biasing the diodes and drawing excessive current from the source. For applications with larger differential signals - such as fast slewing or AC-coupled inputs - external series resistors (e.g., 500 Ω) are recommended to limit current to <±10 mA, as defined in the Absolute Maximum Ratings table.

Does LMV842QMM/NOPB support true single-supply operation down to 2.7 V?

Yes, LMV842QMM/NOPB is fully specified for single-supply operation from 2.7 V to 12 V. At 2.7 V, it maintains rail-to-rail input common-mode range (−0.1 V to 2.8 V) and output swing within 120 mV of each rail (RL = 2 kΩ), with 4.5 MHz GBW and 1 mA per channel supply current preserved. This makes LMV842QMM/NOPB suitable for direct integration with 2.7–3.6 V battery chemistries including LiFePO₄ and primary lithium cells.

Is LMV842QMM/NOPB qualified for automotive applications?

Yes, the "Q" suffix in LMV842QMM/NOPB denotes AEC-Q100 Grade 1 qualification (−40°C to +125°C ambient), including stress testing for HTOL, TC, and ESD per automotive standards. It is explicitly listed in TI's automotive-grade op amp portfolio and used in production cabin air quality sensors, battery management monitors, and ADAS auxiliary signal chains - meeting functional safety requirements for ASIL-B capable systems.

How does the input bias current of LMV842QMM/NOPB vary with common-mode voltage?

LMV842QMM/NOPB exhibits <0.3 pA typical input bias current across its full common-mode range (−0.2 V to 5.2 V at 5 V supply), with variation remaining below 10 pA up to 125°C. Unlike bipolar-input op amps, its CMOS architecture ensures near-constant I_B regardless of V_CM, eliminating V_OS drift due to source impedance mismatch - a critical advantage when buffering high-Z sensors like pH probes or capacitive humidity elements.

Can LMV842QMM/NOPB drive a 10 kΩ load while maintaining rail-to-rail output swing?

Yes, LMV842QMM/NOPB delivers rail-to-rail output swing with ≤50 mV drop from either rail when driving a 10 kΩ load at 5 V supply (25°C), and ≤70 mV at 125°C. This performance is guaranteed across the full operating temperature range and supports direct interfacing with 12- to 16-bit SAR ADCs without gain loss. For heavier loads (e.g., 600 Ω), output swing degrades to ~130 mV from rail - consult Figure 17 in the datasheet for exact V_OUT vs I_LOAD curves.