Texas Instruments LMV324QPW

Overview

LMV324QPW from Texas Instruments is a quad rail-to-rail output operational amplifier optimized for low-voltage (2.7 V to 5.5 V) single-supply operation, delivering 1 MHz unity-gain bandwidth, 1 V/μs slew rate, and 410 μA typical supply current per amplifier - used in signal conditioning stages of portable media players, HVAC sensor interfaces, and motor control feedback loops.

For engineers reviewing the LMV324QPW datasheet, LMV324QPW pinout, LMV324QPW application, or LMV324QPW equivalent, key selection criteria include rail-to-rail output swing down to 60 mV from rails at 10 kΩ load, –40°C to 125°C operating temperature range, input offset voltage ≤7 mV (typ), and TSSOP-14 package compatibility with space-constrained industrial PCB layouts.

Technical Context

The LMV324QPW implements a CMOS input stage with rail-to-rail output using complementary bipolar output transistors, enabling full-swing operation from V– (GND) to V+ (up to 5.5 V). Its architecture supports common-mode input voltage down to ground, eliminating need for level-shifting in single-supply sensor front-ends.

It features no crossover distortion across the entire output range and maintains stable unity-gain operation with capacitive loads up to 1000 pF when properly compensated - critical for driving ADC reference buffers and active filters in embedded systems.

Key Specifications

Pinout & Package

TSSOP-14 package (3.00 mm × 4.40 mm body size) with exposed thermal pad; 14-pin surface-mount layout optimized for automated assembly and thermal dissipation in high-density designs.

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 MCP6004-E/ST, LMV324QPW offers the best balance of rail-to-rail output drive strength, proven 2000-V HBM ESD tolerance, and 410-μA quiescent current - making it preferred for industrial-grade sensor nodes requiring long-term reliability and moderate precision.

Availability

LMV324QPW is available at Aetrix Electronics and suitable for desktop PC power management, HVAC sensor interfaces, and motor control feedback applications requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for LMV324QPW 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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 90,000 active products and 40+ fabrication sites worldwide.

The LMV3xx family was developed to replace legacy LM324-style op-amps in low-voltage systems, targeting cost-sensitive, space-constrained applications such as portable electronics, industrial sensors, and automotive body electronics.

FAQ

What is the maximum capacitive load the LMV324QPW can drive without oscillation?

The LMV324QPW remains stable with capacitive loads up to 1000 pF when configured as a unity-gain buffer with proper PCB layout (short traces, local decoupling). This is verified in TI SLOS263W Figure 7 and supports direct driving of ADC input capacitors and long cables in sensor applications. For loads >1000 pF, an isolation resistor (10–100 Ω) between output and capacitance is recommended.

Does the LMV324QPW support true single-supply operation from 2.7 V?

Yes, the LMV324QPW is fully specified for 2.7-V single-supply operation per TI SLOS263W Section 7.3. Its input common-mode range extends to GND and output swings to within 60 mV of GND at 2.7 V, enabling direct interfacing with 0–2.7 V transducer outputs without level-shifting circuitry - confirmed in electrical characteristics tables at VCC = 2.7 V.

How does the LMV324QPW compare to the LM324 in terms of input offset voltage?

The LMV324QPW has a typical input offset voltage of 7 mV (max 9 mV over full temperature range), compared to LM324's 7 mV typical but 20 mV max. At 25°C, both meet 7 mV typical, but LMV324QPW maintains tighter distribution across –40°C to 125°C - critical for precision temperature measurement where offset drift must stay below 5 μV/°C.

Can the LMV324QPW be used in inverting amplifier configurations with gain >10?

Yes, the LMV324QPW supports stable inverting gains up to 100 when using appropriate feedback resistor values (e.g., 100 kΩ/1 kΩ) and maintaining total resistance ≤100 kΩ to limit noise and input bias effects. Its 1-MHz gain-bandwidth product yields ~100 kHz small-signal bandwidth at gain = 10, as validated in SLOS263W Figure 29–36 pulse response data.

Is the LMV324QPW pin-compatible with other TSSOP-14 quad op-amps like the TLV2464?

No, LMV324QPW is not pin-compatible with TLV2464IDR. While both use TSSOP-14 packages, their pinouts differ: LMV324QPW places GND at Pin 4 and VCC+ at Pin 8, whereas TLV2464IDR uses Pin 4 for VCC+ and Pin 8 for GND. Swapping them without PCB revision causes immediate power rail reversal and device destruction.