Texas Instruments LMV324QDRG4

Overview

LMV324QDRG4 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 across all four channels. It features rail-to-rail output swing, ground-sensing input common-mode range, and operates from –40°C to +125°C - enabling use in motor control feedback, HVAC sensor conditioning, and portable media player audio stages.

For engineers reviewing the LMV324QDRG4 datasheet, LMV324QDRG4 pinout, LMV324QDRG4 application, or LMV324QDRG4 equivalent, key selection criteria include its guaranteed rail-to-rail output drive into 10 kΩ at 2.7 V, low 7 mV max input offset voltage, ESD robustness (2000-V HBM), SOIC-14 package compatibility, and direct functional equivalence to legacy LM324 in low-voltage systems where space and power are constrained.

Technical Context

The LMV324QDRG4 implements a CMOS input stage with rail-to-rail output stage, supporting true single-supply operation down to 2.7 V while maintaining >50 dB CMRR and PSRR over full temperature range. Its internal architecture enables stable unity-gain operation with capacitive loads up to 100 pF without external compensation.

Each of the four independent amplifiers shares identical electrical characteristics: input bias current ≤250 nA, input offset voltage ≤7 mV (typ), and output swing within 180 mV of rails at 10 kΩ load - ensuring consistent performance across channels in multi-stage signal chains like active filters or sensor multiplexing circuits.

Key Specifications

Pinout & Package

LMV324QDRG4 is packaged in a 14-pin SOIC (D) package measuring 8.65 mm × 3.91 mm, with standard JEDEC outline and surface-mount compatibility. Pin numbering follows conventional SOIC top-view orientation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM324DR and TLV2464CDR, LMV324QDRG4 uniquely balances ultra-low voltage operation (2.7 V), rail-to-rail output, industrial temperature range, and sub-1 mA quiescent current - making it the most suitable quad op-amp for next-generation 3.3 V embedded systems where power, space, and reliability are co-constrained.

Availability

LMV324QDRG4 is available at Aetrix Electronics and suitable for motor control feedback, HVAC sensor signal conditioning, and portable media player audio requiring stable component supply across automotive, industrial, and consumer design cycles.

Supply support for LMV324QDRG4 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 years of innovation in precision analog ICs.

LMV324QDRG4 belongs to the LMV3xx low-voltage rail-to-rail output op-amp product line, designed specifically for cost-sensitive, space-constrained applications operating from 2.7 V to 5.5 V - including battery-powered devices, automotive body electronics, and industrial sensor interfaces.

FAQ

What is the maximum supply voltage for LMV324QDRG4?

The absolute maximum supply voltage for LMV324QDRG4 is 5.5 V. Operation beyond this limit risks permanent damage. The device is fully specified from 2.7 V to 5.5 V, with optimal performance at 3.3 V and 5 V nominal supplies. At 5.5 V, output swing remains rail-to-rail, and input common-mode range extends to VCC+ – 0.2 V, as confirmed in Section 7.1 of the SLOS263W datasheet.

Does LMV324QDRG4 support true single-supply operation with inputs at ground?

Yes, LMV324QDRG4 supports true single-supply operation with inputs extending to GND. Its input common-mode voltage range includes ground (–0.2 V to 1.7 V at 2.7 V supply), enabling direct interface with 0 V referenced sensors such as thermistors and bridge transducers without level-shifting circuitry - a key advantage over older op-amps like LM324.

What is the typical input offset voltage of LMV324QDRG4 and how does it affect precision designs?

The typical input offset voltage of LMV324QDRG4 is 7 mV, with a maximum of 9 mV over temperature. In a 100× non-inverting amplifier configuration, this introduces up to ±0.9% gain error at room temperature. For higher precision, external trimming or auto-zero architectures are recommended; however, the 5 μV/°C tempco ensures stability across –40°C to +125°C operation.

Can LMV324QDRG4 drive capacitive loads, and what is the maximum stable value?

LMV324QDRG4 is stable driving capacitive loads up to 100 pF without external compensation, as verified in Figure 7 of the SLOS263W datasheet. Beyond 100 pF, phase margin degrades below 60°, risking oscillation. For loads >100 pF (e.g., long cables or LCD bias networks), a series resistor (≥100 Ω) between output and load restores stability while preserving DC accuracy.

Is LMV324QDRG4 pin-compatible with standard LM324 packages?

LMV324QDRG4 uses the same SOIC-14 (D) package footprint and pinout as LM324DR, enabling drop-in replacement in existing designs. However, due to its rail-to-rail output and lower supply current, layout changes may be needed to optimize decoupling and thermal relief - especially when upgrading from 12 V to 3.3 V operation where LMV324QDRG4's full benefits are realized.