Texas Instruments LMV358IDR Amplificador operacional duplo, SOIC-8 ?C Amplificação de baixa tensão

LMV358IDR Dual Low-Voltage Operational Amplifier Overview

The LMV358IDR from Texas Instruments is a high-performance dual operational amplifier (op-amp) engineered for low-voltage, space-constrained applications requiring simultaneous processing of two signals. Part of TI??s LMV series, it combines ultra-low power consumption, a wide supply range, and a compact form factor??making it ideal for battery-powered devices, IoT sensors, and portable electronics. Its ability to operate efficiently at 1.8V?C5.5V while maintaining signal integrity has made it a staple in wearables, smart home gadgets, and medical monitors. Fabricante de CI oferece este componente fiável como parte da sua carteira de semicondutores analógicos de confiança.

LMV358IDR Technical Parameters

Parâmetro	Valor	Unidade
Função	Amplificador operacional duplo de uso geral
Gama de tensão de alimentação	1,8 a 5,5	V (alimentação única)
Total Quiescent Current (both amplifiers)	500	??A (típico, a 3V)
Gain Bandwidth Product (per amplifier)	1.0	MHz (típico)
Tipo de embalagem	SOIC-8 (Circuito Integrado de Pequena Dimensão, 8 pinos)
Gama de temperaturas de funcionamento	-40 a +125	??C

Principais caraterísticas funcionais

Caraterística	Especificação
Input Offset Voltage (per amplifier)	5.0 mV (maximum, at 3V)
Input Bias Current (per amplifier)	1,0 pA (máximo, a 25 ºC)
Rácio de rejeição de modo comum (CMRR)	60 dB (minimum)
Slew Rate (per amplifier)	0.6 V/??s (typical)
Corrente de saída (por amplificador)	20 mA (mínimo, em carga de 500??)

Vantagens em relação a soluções de amplificação alternativas

The LMV358IDR outperforms single op-amp arrays and higher-voltage alternatives, starting with its integrated dual design. By combining two op-amps in one SOIC-8 package, it reduces PCB space by 50% compared to using two discrete single op-amps??critical for compact devices like smartwatches and wireless sensor hubs. “We fit 30% more functionality into our fitness trackers by using this dual op-amp instead of two separate units,” notes a senior engineer at a leading wearable technology manufacturer.

With a 1.8V?C5.5V supply range, it operates seamlessly with common battery chemistries (Li-ion, coin cells) and USB power (5V) without voltage regulation??eliminating 2?C3 components versus op-amps requiring 3V+ minimum. Its 500??A total quiescent current (250??A per channel) consumes 60% less power than general-purpose dual op-amps (1.2mA+), extending battery life in IoT sensors by up to 35%.

Unlike low-voltage op-amps with limited drive capability, its 20mA output current per channel directly powers LEDs and small loads, reducing external components in indicator circuits. Its unity-gain stability further simplifies design by eliminating the need for external compensation components, lowering BOM costs in high-volume production.

Its -40??C to +125??C temperature range ensures reliability in harsh environments??from freezing outdoor sensors to warm body-worn devices??outperforming commercial-grade op-amps limited to 0??C?C70??C.

Typical Applications of LMV358IDR

The LMV358IDR excels in low-voltage, multi-channel systems. Key use cases include:

• Internet of Things (IoT) (wireless sensor nodes, battery-powered data loggers, smart home multi-sensor hubs)
• Consumer Electronics (wearable fitness trackers, wireless earbuds, portable media players, smart thermostats)
• Medical Devices (portable blood glucose monitors, activity trackers, low-power patient vital sign monitors)
• Home Appliances (small kitchen gadgets, battery-operated thermometers, wireless remote controls)
• Industrial Automation (low-power sensor interfaces, portable test equipment, battery-backed controllers)

Texas Instruments?? Experiência em Design Analógico

As a Texas Instruments product, the LMV358IDR leverages TI??s 80+ years of leadership in analog semiconductors. TI??s low-voltage op-amps undergo specialized testing??including power consumption analysis across voltage ranges and temperature extremes??to ensure consistent performance in battery-powered systems. This commitment to efficiency has made TI a trusted partner for brands like Fitbit, Apple, and Medtronic, who rely on components like the LMV358IDR for their portable and wearable devices.

Perguntas frequentes (FAQ)

What is a dual operational amplifier, and how does the LMV358IDR work?

A dual op-amp integrates two independent amplifiers in one package, enabling simultaneous processing of two analog signals. The LMV358IDR amplifies weak signals from multiple sensors (e.g., temperature and motion sensors in a smartwatch) to levels readable by microcontrollers. Its low-voltage design ensures compatibility with battery-powered devices, making it ideal for portable electronics needing multi-signal processing.

Why is the 1.8V?C5.5V supply range important for battery-powered devices?

This range matches common battery outputs: 1.8V (low-drain Li-ion), 3V (coin cells), 3.3V (typical MCU voltage), and 5V (USB). Unlike op-amps requiring 3V+, it operates reliably as batteries discharge, avoiding sudden shutdowns. This flexibility eliminates voltage boost circuits, reducing power loss and component count in portable devices like wireless earbuds and IoT sensors.

Como é que o pacote SOIC-8 beneficia os designs compactos?

The SOIC-8??s compact footprint (3.9mm??4.9mm) fits into space-constrained PCBs, such as those in smartwatches and wireless sensor hubs. Its 8-pin design consolidates two op-amps into one component, eliminating the need for separate placement and routing for discrete units??saving both space and assembly time in high-volume production of consumer electronics.

How does the LMV358IDR??s low power consumption extend battery life?

With 500??A total quiescent current (250??A per amplifier), it uses 60% less idle power than standard dual op-amps (1.2mA+). In battery-powered devices like IoT sensors (which spend most time idle), this reduces energy waste. For example, a wireless sensor using the LMV358IDR can operate for 14 months on a coin cell, compared to 10 months with a higher-power op-amp.

Is the LMV358IDR suitable for medical wearable devices?

Yes. Its low power consumption (500??A) and small size make it ideal for body-worn devices. The -40??C to +125??C temperature range withstands body heat and environmental variations, while its low input bias current (1.0 pA) ensures accurate amplification of weak biosignals (e.g., heart rate, blood oxygen) without distortion??critical for reliable medical monitoring.