Texas Instruments LMV344MTX

Overview

LMV344MTX from Texas Instruments is a quad rail-to-rail output CMOS operational amplifier optimized for low-voltage portable applications. It operates from 2.7 V to 5.5 V, draws 100 µA per amplifier, delivers 1 MHz gain bandwidth and 1 V/µs slew rate, and features ultra-low 20 fA input bias current - enabling precision signal conditioning in battery-powered medical sensors and handheld instrumentation.

For engineers reviewing the LMV344MTX datasheet, LMV344MTX pinout, LMV344MTX application, or LMV344MTX equivalent, key selection criteria include its quad-channel TSSOP-14 package, rail-to-rail output swing within 30 mV of rails (at 2 kΩ load), −40°C to +125°C industrial-plus temperature range, and shutdown capability (on LMV341-N only - not applicable to LMV344MTX).

Technical Context

The LMV344MTX implements a PMOS input stage delivering 20 fA typical input bias current and high input impedance, paired with a patented class AB turnaround stage that reduces input-referred voltage noise to 29 nV/√Hz at 10 kHz while maintaining 1 MHz GBW and 1 V/µs slew rate across 2.7–5.5 V supply. Its rail-to-rail output stage supports full-swing operation into loads ≥2 kΩ.

Specified over −40°C to +125°C, it achieves 0.55 mV typical input offset voltage (25°C, 2.7 V), 56 dB minimum CMRR, and 65 dB minimum PSRR. The device lacks an integrated shutdown pin - unlike the LMV341-N - and requires external power control for ultra-low-power states.

Key Specifications

Pinout & Package

LMV344MTX is packaged in a 14-pin TSSOP (PW package), body size 5.00 mm × 4.40 mm, with exposed pad for thermal enhancement. Pin numbering follows standard JEDEC TSSOP top-view convention.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV2464IDR and MCP6004-E/ST, LMV344MTX uniquely balances ultra-low 100 µA per amp supply current, 1 MHz bandwidth, rail-to-rail output, and full −40°C to +125°C operation - making it optimal for long-life, high-precision industrial and automotive sensor nodes.

Availability

LMV344MTX is available at Aetrix Electronics and suitable for battery monitoring, portable medical devices, industrial temperature transmitters, and audio line drivers requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for LMV344MTX 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 innovation in precision amplifiers and low-power signal chain solutions.

The LMV34x-N family was designed specifically for low-voltage portable electronics - delivering rail-to-rail output, ultra-low input bias current, and wide temperature operation in space-constrained SC70/VSSOP/TSSOP packages.

FAQ

Does LMV344MTX have a shutdown pin?

No, LMV344MTX does not include a shutdown pin. Shutdown functionality is exclusive to the LMV341-N (single-channel variant). For power gating in quad-channel designs, external FET-based supply switching or system-level power management must be implemented. LMV344MTX remains fully operational whenever V+ and V− are powered within 2.7–5.5 V.

What is the maximum capacitive load LMV344MTX can drive stably?

LMV344MTX maintains stability with up to 100 pF capacitive load when configured as a unity-gain buffer (AV = +1) with RL ≥ 2 kΩ. Driving larger loads (e.g., >500 pF) requires isolation resistors or compensation networks per Figure 26–27 in the SNOS990H datasheet to prevent peaking or oscillation.

Can LMV344MTX operate from a single 3.3 V supply?

Yes, LMV344MTX is fully specified for single-supply operation from 3.3 V (within its 2.7–5.5 V range). With V− tied to GND, its rail-to-rail output swings from <30 mV above GND to <30 mV below 3.3 V, supporting direct interfacing to 3.3 V SAR ADCs and microcontroller analog inputs.

Is LMV344MTX pin-compatible with other quad op-amps in TSSOP-14?

LMV344MTX uses the industry-standard TSSOP-14 pinout for quad op-amps (e.g., same pin mapping as TLV2464, MCP6004, and LM324 variants), but functional compatibility requires verification of input/output voltage ranges, supply current, and AC performance. No manufacturer declares it as a drop-in replacement.

What is the input common-mode voltage range for LMV344MTX?

At 2.7 V supply, the input common-mode voltage range is −0.2 V to +1.7 V (relative to V−); at 5 V supply, it extends to −0.2 V to +4.0 V. This allows operation with inputs near ground or mid-supply but excludes direct connection to V+ without level-shifting circuitry.