Texas Instruments LM324LVIDR

Overview

LM324LVIDR from Texas Instruments is a quad, low-voltage, rail-to-rail input operational amplifier designed for cost-sensitive, battery-powered systems. It operates from 2.7 V to 5.5 V, delivers ±1 mV input offset voltage, 1 MHz unity-gain bandwidth, 90 µA per channel quiescent current, and supports –40°C to 125°C industrial temperature range - enabling use in low-side current sensing and environmental sensor signal conditioning.

For engineers reviewing the LM324LVIDR datasheet, LM324LVIDR pinout, LM324LVIDR application, or LM324LVIDR equivalent, key selection criteria include single-supply operation with ground-sensing inputs, ultra-low power consumption, guaranteed unity-gain stability, and robust 2-kV HBM ESD rating - all critical for portable appliance, power module, and industrial sensor interface designs.

Technical Context

The LM324LVIDR implements a P-channel input stage with parallel N-channel pair to eliminate phase reversal during overdrive, supporting true single-supply operation with common-mode input range extending to V– and within 1 V of V+. Its internal Class AB output stage enables rail-to-rail output swing under light loads (e.g., ≥2 kΩ), while maintaining 1.5 V/µs slew rate and 75° phase margin at unity gain.

It features integrated ESD protection diodes steering transients to V+ and V– rails, and exhibits 40 nV/√Hz input voltage noise density and 84 dB DC CMRR at 2.7 V supply - optimized for precision DC-coupled amplification in noisy, thermally variable environments such as HVAC control and battery management systems.

Key Specifications

Pinout & Package

LM324LVIDR is supplied in a 14-pin SOIC package (body size 8.65 mm × 3.91 mm), optimized for automated assembly and thermal dissipation in high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM324DR and TLV9004IDR, LM324LVIDR uniquely balances ultra-low quiescent current, industrial temperature qualification, and proven 2-kV HBM resilience - making it the optimal choice for cost-constrained, thermally demanding, and ESD-prone embedded systems where reliability is non-negotiable.

Availability

LM324LVIDR is available at Aetrix Electronics and suitable for low-power sensor interfaces, battery management subsystems, and industrial power supply monitoring requiring stable component supply across long production lifecycles.

Supply support for LM324LVIDR 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 precision amplifiers and power management ICs.

The LM324LVIDR belongs to TI's LM3xxLV low-voltage op-amp family, engineered specifically for cost-optimized, battery-powered applications demanding rail-to-rail input operation, extended temperature capability, and robust ESD tolerance.

FAQ

What is the maximum capacitive load the LM324LVIDR can drive while remaining stable?

The LM324LVIDR is unity-gain stable with up to 100 pF capacitive load, as verified by phase margin ≥75° in the datasheet. Driving larger loads (e.g., >200 pF) may cause overshoot or ringing; for such cases, an isolation resistor (e.g., 10–100 Ω) between output and load is recommended. This behavior is documented in Figure 6-20 (Phase Margin vs Capacitive Load) of the SBOS944E datasheet for LM324LVIDR.

Does the LM324LVIDR support true rail-to-rail output swing?

The LM324LVIDR provides rail-to-rail output swing only under light load conditions (≥2 kΩ). At full load, its output saturates within 40 mV of V– and 1 V of V+, as specified in the Electrical Characteristics table. This limitation is inherent to its Class AB output stage design and must be accounted for in precision applications - for example, a 5-V supply yields ~0.04–4.0 V usable output range with 10-kΩ load, confirmed in the VOL/VOH specifications for LM324LVIDR.

Can the LM324LVIDR be used in a single-supply configuration with ground-referenced inputs?

Yes - the LM324LVIDR's common-mode input range explicitly includes V– (ground in single-supply mode) and extends to (V+) – 1 V, enabling direct connection of ground-referenced sensors like thermistors or bridge circuits. This capability is validated across –40°C to +125°C and is a defining feature of the LM3xxLV family, distinguishing LM324LVIDR from legacy LM324 variants that require input biasing.

What is the overload recovery time of the LM324LVIDR, and why does it matter?

The LM324LVIDR recovers from output saturation in 1 µs (typ), as measured under standard test conditions (SBOS944E, Section 6.7). This fast recovery ensures minimal disruption in dynamic applications like current-limiting circuits or transient event detection - for instance, in a UPS monitoring system, it guarantees timely resumption of accurate voltage regulation after a line surge forces the amplifier into saturation.

Is the LM324LVIDR pin-compatible with the standard LM324?

Yes - the LM324LVIDR uses the industry-standard 14-pin SOIC footprint and identical pin mapping (per Table 5-3 in SBOS944E), including V+ on Pin 4 and V– on Pin 11. This allows direct substitution in existing LM324-based designs without PCB modification, while delivering improved performance: lower power (90 µA vs 1.2 mA/ch), wider temperature range (–40°C to +125°C vs 0°C to +70°C), and enhanced ESD robustness (2 kV HBM vs unspecified).