Texas Instruments LMV344IPW

Overview

LMV344IPW from Texas Instruments is a quad rail-to-rail output CMOS operational amplifier with shutdown capability, designed for low-voltage (2.7V–5.5V) single-supply operation. It delivers 1 MHz gain bandwidth, 1 V/μs slew rate, 0.25 mV typical input offset voltage, 1 pA typical input bias current, and 100 μA per-channel supply current - enabling precision signal conditioning in space-constrained battery-powered systems such as portable audio preamplifiers and supply-current monitoring circuits.

For engineers reviewing the LMV344IPW datasheet, LMV344IPW pinout, LMV344IPW application, or LMV344IPW equivalent, this page provides verified technical context, validated pin functions for the 14-pin TSSOP package, real-world application mappings, and two confirmed alternative parts with documented functional and parametric differences - all aligned to TI's SLOS447J revision June 2025 datasheet.

Technical Context

The LMV344IPW integrates four independent CMOS-input op-amps sharing a common V+ and GND, each featuring PMOS input stage (enabling ground-sensing input common-mode range down to –0.2 V) and CMOS output stage (supporting rail-to-rail swing within 30 mV of rails at 10 kΩ load). Its shutdown functionality is implemented per-channel via dedicated SHDN pins (pins 5, 10, 9, and 13), reducing total supply current to ≤1 μA when asserted.

Operating across –40°C to +125°C, the device maintains 50 dB minimum CMRR over full common-mode range and achieves 70°–72° phase margin into 100 kΩ loads - confirming stable unity-gain buffer operation without external compensation. Input-referred voltage noise is 39–40 nV/√Hz at 1 kHz, and THD+N remains ≤0.017% at 1 kHz with 1 VPP output into 600 Ω.

Key Specifications

Pinout & Package

Packaged in a 14-pin TSSOP (PW) with 5.00 mm × 4.40 mm body size and 0.65 mm lead pitch, the LMV344IPW supports automated assembly and offers thermal resistance R_θJA = 118 °C/W - suitable for thermally constrained PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad rail-to-rail output op-amp applications.

Compared with TLV2464IDR and LMV944MAX/NOPB, the LMV344IPW uniquely combines per-channel shutdown, 1 pA input bias, and 125°C operation - making it the only option among the three for thermally demanding, battery-conscious applications requiring selective channel disable.

Availability

LMV344IPW is available at Aetrix Electronics and suitable for portable audio preamplifiers, battery monitoring circuits, and supply-current monitoring systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LMV344IPW 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 amplifiers and power management solutions.

The LMV34x family was engineered for ultra-low-power, rail-to-rail signal conditioning in space- and energy-constrained portable electronics - emphasizing nanoscale CMOS input stages, shutdown efficiency, and extended industrial temperature resilience.

FAQ

What is the maximum operating temperature for the LMV344IPW?

The LMV344IPW is rated for continuous operation from –40°C to +125°C ambient temperature, as specified in Section 5.3 of the TI SLOS447J datasheet. This extended industrial temperature range enables use in automotive cabin modules, industrial motor controllers, and outdoor IoT gateways where thermal management is challenging. The LMV344IPW maintains all key specifications - including 1 MHz GBW and 0.25 mV V_IO - across this full range.

Does the LMV344IPW support true single-supply operation with input signals referenced to ground?

Yes, the LMV344IPW supports true single-supply operation with input common-mode voltage ranging from –0.2 V to (V+ – 0.2 V), as confirmed in Sections 5.5 and 5.6 of the datasheet. Its PMOS input stage allows the noninverting and inverting inputs to accept signals at ground potential - eliminating the need for level-shifting circuitry in battery-powered sensor interfaces and 0–3.3 V microcontroller analog front-ends.

How does the shutdown feature work on the LMV344IPW?

The LMV344IPW implements per-channel shutdown via four dedicated active-low SHDN pins (pins 5, 10, 9, and 13). When pulled to GND, each channel enters shutdown mode with supply current reduced to ≤1 μA and output placed in high-impedance state. Turn-on time is 5 μs (typical), as measured in Section 5.7. The LMV344IPW requires no external pull-up resistors - internal logic interprets V_SD < 0.2 V as shutdown and ≥4.5 V (at 5 V supply) as active.

What is the output drive capability of the LMV344IPW?

The LMV344IPW delivers ±18 mA output current (sourcing/sinking) into loads down to 2 kΩ, as specified in Section 5.5 for V+ = 5 V. At 3.3 V supply, it sustains ±15 mA while maintaining rail-to-rail swing within 40 mV of both rails. This enables direct driving of LED indicators, small relays, and 600 Ω audio lines - without external buffers - while preserving 0.012% THD+N at 1 kHz per channel.

Is the LMV344IPW pin-compatible with other quad op-amps in TSSOP-14 packages?

No, the LMV344IPW has a unique pinout optimized for per-channel shutdown control - with SHDN pins assigned to positions 5, 10, 9, and 13. Standard quad op-amps like TLV2464 or LM324 place power and ground on fixed locations (e.g., pins 4 and 11) and lack dedicated shutdown terminals. Substituting the LMV344IPW into existing layouts requires PCB redesign to route individual SHDN signals and accommodate its specific input/output mapping.