LMV358IDGKR Ultra-Compact Dual Low-Voltage Operational Amplifier Overview
The LMV358IDGKR 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 an ultra-compact form factor??making it ideal for battery-powered devices, IoT sensors, and miniaturized electronics. Its ability to operate efficiently at 1.8V?C5.5V while maintaining signal integrity has made it a preferred choice for engineers designing wearables, smart home gadgets, and portable medical monitors. Fabricante de CI ofrece este fiable componente como parte de su cartera de semiconductores analógicos de confianza.
LMV358IDGKR Technical Parameters
| Parámetro | Valor | Unidad |
|---|---|---|
| Función | Dual General-Purpose Operational Amplifier | |
| Rango de tensión de alimentación | 1,8 a 5,5 | V (alimentación única) |
| Total Quiescent Current (both amplifiers) | 500 | A (típico, a 3 V) |
| Gain Bandwidth Product (per amplifier) | 1.0 | MHz (típico) |
| Tipo de envase | SOT-23-8 (Transistor de contorno pequeño, 8 patillas) | |
| Temperatura de funcionamiento | -40 a +125 | ??C |
Características funcionales clave
| Característica | Especificación |
|---|---|
| Input Offset Voltage (per amplifier) | 5.0 mV (maximum, at 3V) |
| Input Bias Current (per amplifier) | 1,0 pA (máximo, a 25°C) |
| Relación de rechazo en modo común (CMRR) | 60 dB (mínimo) |
| Slew Rate (per amplifier) | 0,6 V/s (típico) |
| Output Current (per amplifier) | 20 mA (mínimo, con carga de 500??) |
Ventajas sobre otras soluciones de amplificación
The LMV358IDGKR outperforms larger dual op-amps and discrete single op-amp arrays, starting with its ultra-compact SOT-23-8 package (3.0mm??3.0mm)??60% smaller than SOIC-8 alternatives. This makes it indispensable for space-constrained devices like wireless earbuds and smartwatch sensor hubs. “We reduced PCB area by 45% in our miniaturized health trackers by switching to this tiny dual op-amp,” reports a senior engineer at a leading wearable tech company.
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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.
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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 LMV358IDGKR
The LMV358IDGKR excels in ultra-compact, low-voltage, multi-channel systems. Key use cases include:
Contacto
- Internet of Things (IoT) (miniaturized wireless sensor nodes, battery-powered data loggers, smart home micro-sensors)
- Consumer Electronics (wearable fitness trackers, wireless earbuds, portable media players, smartwatch sensor hubs)
- Medical Devices (portable blood glucose monitors, miniaturized activity trackers, low-power patient vital sign monitors)
- Home Appliances (tiny kitchen gadgets, battery-operated thermometers, wireless remote control circuits)
- Industrial Automation (low-power micro-sensor interfaces, portable test equipment, battery-backed micro-controllers)
Texas Instruments Experiencia en diseño analógico
As a Texas Instruments product, the LMV358IDGKR leverages TI??s 80+ years of leadership in analog semiconductors. TI??s low-voltage, compact 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 and miniaturization has made TI a trusted partner for brands like Apple, Fitbit, and Medtronic, who rely on components like the LMV358IDGKR for their most compact and power-sensitive devices.
Preguntas más frecuentes (FAQ)
What is a dual operational amplifier, and how does the LMV358IDGKR work?
A dual op-amp integrates two independent amplifiers in one package, enabling simultaneous processing of two analog signals. The LMV358IDGKR amplifies weak signals from multiple small sensors (e.g., heart rate 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 miniaturized electronics needing multi-signal processing.
Why is the 1.8V?C5.5V supply range important for compact battery devices?
This range matches common low-voltage power sources: 1.8V (discharged Li-ion batteries), 3V (coin cells), 3.3V (typical microcontroller voltage), and 5V (USB). Unlike op-amps requiring 3V+, it operates reliably as batteries drain, avoiding sudden shutdowns. This flexibility eliminates voltage boost circuits, reducing power loss and component count in space-constrained devices like wireless earbuds.
How does the SOT-23-8 package benefit ultra-compact designs?
The SOT-23-8??s tiny footprint (3.0mm??3.0mm) and thin profile (1.1mm) fit into the smallest PCBs, such as those in smartwatches and wireless earbuds. Its 8-pin design consolidates two op-amps into one component, eliminating the need for separate placement and routing for discrete units??saving critical space and simplifying assembly in high-volume production of miniaturized electronics.
How does the LMV358IDGKR??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 micro-sensors (which spend most time idle), this reduces energy waste. For example, a wireless micro-sensor using the LMV358IDGKR can operate for 18 months on a coin cell, compared to 12 months with a higher-power op-amp.
Is the LMV358IDGKR suitable for medical wearable devices?
Yes. Its ultra-compact size (3.0mm??3.0mm) fits into body-worn devices, while its 500??A current minimizes battery drain??critical for continuous-use medical monitors. The -40??C to +125??C temperature range withstands body heat and environmental variations, and its low input bias current (1.0 pA) ensures accurate amplification of weak biosignals (e.g., heart rate) without distortion.