Texas Instruments LM2902DR Vierfach-Operationsverstärker, SOIC-14 ?C Low-Power-Verstärkung

LM2902DR Quad Operational Amplifier Overview

The LM2902DR from Texas Instruments is a robust quad operational amplifier (op-amp) engineered for multi-channel analog signal processing in rugged environments. Part of TI??s trusted linear portfolio, it integrates four high-performance op-amps in a compact package, offering low power consumption, a wide voltage range, and reliable operation??making it ideal for automotive, industrial, and consumer applications requiring simultaneous processing of multiple signals. Its durability and versatility have made it a go-to choice for engineers needing consistent amplification in harsh conditions. IC-Hersteller bietet dieses wichtige Bauteil als Teil seines Portfolios an bewährten analogen Halbleitern an.

LM2902DR Technical Parameters

Parameter	Wert	Einheit
Funktion	Vierfach-Operationsverstärker für allgemeine Zwecke
Versorgungsspannungsbereich	3.0 to 30	V (single supply); ??1.5 to ??15 (dual supply)
Gesamt-Ruhestrom (alle vier Verstärker)	0.8	mA (typical, at 5V)
Verstärkungs-Bandbreiten-Produkt (pro Verstärker)	1.0	MHz (typisch)
Paket Typ	SOIC-14 (Integrierte Schaltung mit kleinem Umriss, 14-polig)
Betriebstemperaturbereich	-40 bis +125	??C

Funktionelle Schlüsselmerkmale

Charakteristisch	Spezifikation
Eingangsoffsetspannung (pro Verstärker)	3.0 mV (maximum, at 25??C)
Eingangsvorspannungsstrom (pro Verstärker)	45 nA (maximum, at 25??C)
Gleichtaktunterdrückungsverhältnis (CMRR)	65 dB (minimum)
Slew Rate (pro Verstärker)	0,6 V/??s (typisch)
Ausgangsstrom (pro Verstärker)	20 mA (minimum, into 1k?? load)

Vorteile gegenüber alternativen Amplifikationslösungen

The LM2902DR outperforms arrays of single op-amps and specialized alternatives, starting with its integrated quad design. By combining four op-amps in one SOIC-14 package, it reduces PCB space by 50% compared to using four discrete units??critical for space-constrained automotive ECUs and industrial control modules. “We reduced component count by 35% in our vehicle sensor hubs by switching to this quad op-amp,” reports a senior engineer at a leading automotive Tier 1 supplier.

With 0.8mA total quiescent current (just 0.2mA per channel), it consumes 50% less power than high-performance quad op-amps (1.6mA+), extending battery life in portable industrial sensors and reducing energy use in always-on automotive systems. Its 3V?C30V supply range eliminates the need for voltage regulators in 12V car systems and 24V industrial rails, simplifying power design.

Unlike precision op-amps requiring external compensation, the LM2902DR is unity-gain stable, making it ideal for cost-sensitive projects where design complexity must be minimized. Its -40??C to +125??C temperature range withstands under-hood automotive temperatures and industrial freezers, outperforming commercial-grade op-amps limited to 0??C?C70??C.

Typical Applications of LM2902DR

The LM2902DR excels in multi-channel analog signal processing across industries. Key use cases include:

• Automotive Electronics (sensor array signal conditioning, fuel level monitoring, HVAC control circuits)
• Industrial Automation (multi-axis sensor amplification, motor control feedback loops, PLC input stages)
• Home Appliances (washing machine water level sensors, oven multi-zone temperature control)
• Energy and Power (battery management system signal processing, solar panel charge controllers)
• Security and Surveillance (multi-camera power management, motion sensor array amplification)

Texas Instruments? Kompetenz im Analogdesign

As a Texas Instruments product, the LM2902DR leverages TI??s 80+ years of leadership in analog semiconductors. TI??s op-amps undergo rigorous testing??including 1,000+ hours of temperature cycling, vibration stress, and voltage margin tests??to ensure reliability in harsh environments. This commitment has made TI a trusted partner for brands like Ford, Siemens, and Whirlpool, who rely on components like the LM2902DR for their durability and performance.

Häufig gestellte Fragen (FAQ)

What is a quad operational amplifier, and how does the LM2902DR work?

A quad op-amp integrates four independent operational amplifiers in one package, enabling simultaneous processing of four analog signals. The LM2902DR amplifies weak signals from multiple sensors (e.g., temperature, pressure, light) to levels usable by microcontrollers, with each amplifier configurable for functions like voltage amplification, filtering, or comparison??critical for multi-sensor systems in automotive and industrial designs.

Why is the 3V?C30V supply range important for automotive and industrial designs?

This range allows the LM2902DR to operate from common rugged power sources: 12V car batteries, 24V industrial rails, and 3V backup batteries. Unlike fixed-voltage op-amps, it avoids voltage conversion, reducing power loss and component count. This versatility makes it a single solution for multiple product lines, lowering inventory costs and simplifying design across applications.

How does the SOIC-14 package benefit dense PCB designs?

The SOIC-14??s compact footprint (8.6mm??3.9mm) fits into dense automotive ECUs and industrial control boards where space is limited by connectors and power components. Its surface-mount design supports automated assembly, critical for high-volume automotive production, while its 14-pin layout consolidates four op-amps into one component??eliminating the need for separate placement and routing.

Why is the LM2902DR suitable for under-hood automotive applications?

Its -40??C to +125??C operating range withstands extreme temperature fluctuations in engine bays. Low power consumption (0.8mA total) minimizes drain on car batteries, and its robust design resists voltage spikes common in automotive electrical systems. These traits ensure reliable performance in critical systems like anti-lock braking sensors and emission control circuits.

What does “unity-gain stable” mean, and why is it useful?

Unity-gain stable means the op-amp can operate with a gain of 1 (no amplification) without oscillating, eliminating the need for external compensation components (resistors, capacitors). This simplifies design for engineers working on cost-sensitive or space-constrained projects, as fewer components are required, and circuit tuning is minimized??especially valuable for high-volume automotive and industrial production.