Texas Instruments LMV341MGX

Overview

LMV341MGX from Texas Instruments is a single-channel, rail-to-rail output CMOS operational amplifier with active-low shutdown control, designed for ultra-low-power portable applications. It delivers 1 MHz gain bandwidth, 1 V/µs slew rate, 20 fA input bias current, and consumes only 100 µA supply current (active) or 45 pA (shutdown), enabling precision signal conditioning in battery-powered systems such as cellular handset audio buffers and supply current monitoring circuits.

For engineers reviewing the LMV341MGX datasheet, LMV341MGX pinout, LMV341MGX application, or LMV341MGX equivalent, key selection considerations include its SC70-6 package footprint, shutdown timing (5 µs turn-on), rail-to-rail output swing (within 24 mV of rails at 2.7 V), low-noise performance (29 nV/√Hz at 10 kHz), and guaranteed operation across −40°C to +125°C.

Technical Context

The LMV341MGX employs a patented Class AB turnaround stage that reduces input-referred offset voltage, noise, and quiescent current while preserving slew rate and open-loop gain. Its PMOS input stage enables ultra-low input bias current (20 fA typical) and high input impedance, critical for high-impedance sensor interfaces and precision current sensing.

It operates from 2.7 V to 5.5 V single supply, supports rail-to-rail output swing (e.g., 24 mV from V+ at 2.7 V, RL = 2 kΩ), and features an active-low SHDN pin that places the output in high-impedance state and reduces supply current to 45 pA - making it suitable for intermittent-sampling architectures like battery voltage monitors and portable data loggers.

Key Specifications

Pinout & Package

The LMV341MGX is housed in a 6-pin SC70 package (2.00 mm × 1.25 mm body size), optimized for space-constrained PCB layouts in handheld electronics.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV6001IDCKR and OPA316IDBVR, the LMV341MGX uniquely combines sub-100-µA active current, 45-pA shutdown, and integrated enable control in a 2.0 × 1.25 mm SC70 package - making it the only viable option for applications requiring both precision and aggressive power cycling.

Availability

LMV341MGX is available at Aetrix Electronics and suitable for battery monitoring, portable audio buffering, and supply current sensing applications requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across temperature extremes.

Supply support for LMV341MGX 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 low-power precision amplifiers for portable and industrial markets.

The LMV34x-N series was designed specifically for ultra-low-power, rail-to-rail output applications in space-constrained portable electronics - extending TI's Silicon Dust portfolio with enhanced size, speed, and power efficiency.

FAQ

What is the maximum operating temperature range for the LMV341MGX?

The LMV341MGX is specified to operate across −40°C to +125°C, meeting industrial-plus requirements. This range is validated per TI's SNOS990H datasheet Section 6.3 and enables use in automotive cabin modules, industrial sensors, and ruggedized portable equipment where ambient temperatures exceed standard commercial limits.

Does the LMV341MGX support true rail-to-rail input operation?

No - the LMV341MGX features rail-to-rail *output* only. Its input common-mode voltage range extends from V– (GND) to V+ – 0.2 V at 2.7 V supply (Section 6.5), meaning it cannot accept signals at the positive rail. For true rail-to-rail input, consider alternatives like the TLV9001, but note those lack the LMV341MGX's 45-pA shutdown capability.

Can the LMV341MGX drive a 600-Ω load at 1 VPP without distortion?

Yes - the LMV341MGX achieves THD+N of 0.017% at 1 kHz with 1 VPP output into 600 Ω (Section 6.6), confirming clean operation into audio line loads. However, output swing is limited to ~2.6 VPP at 2.7 V supply, so full-scale 1 VPP is readily supported with margin.

Is the shutdown pin of the LMV341MGX compatible with 1.8-V logic levels?

No - the SHDN pin requires ≥2.4 V (min) to guarantee enable at 2.7 V supply (Section 6.5). At 1.8-V logic, the pin may not reliably activate the amplifier. A level shifter or pull-up to V+ is required for interfacing with 1.8-V microcontrollers.

How does the LMV341MGX compare to the LMV341IDBVR in terms of package and performance?

Both share identical electrical specifications, but LMV341MGX uses SC70-6 (2.0 × 1.25 mm), while LMV341IDBVR uses SOT-23-6 (2.9 × 1.6 mm). The SC70 package reduces PCB area by ~55%, critical for ultra-compact designs - with no trade-off in bandwidth, noise, or power consumption.