LMV321IDBVR Ultra-Compact Low-Voltage Operational Amplifier Overview
The LMV321IDBVR from Texas Instruments is a high-performance single operational amplifier (op-amp) engineered for low-voltage, space-constrained applications. Part of TI??s LMV series, it combines ultra-low power consumption, a wide supply range, and a tiny 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 go-to choice for engineers designing compact, energy-sensitive systems like wearables, smart home sensors, and medical monitors. الشركة المصنعة للدوائر المتكاملة offers this essential component as part of its portfolio of trusted analog semiconductors.
LMV321IDBVR Technical Parameters
| المعلمة | القيمة | الوحدة |
|---|---|---|
| الوظيفة | Single General-Purpose Operational Amplifier | |
| نطاق جهد الإمداد | 1.8 إلى 5.5 | V (single supply) |
| تيار التهدئة | 250 | ??A (typical, at 3V) |
| كسب منتج عرض النطاق الترددي | 1.0 | MHz (typical) |
| نوع الحزمة | SOT-23-5 (Small Outline Transistor, 5-pin) | |
| نطاق درجة حرارة التشغيل | -40 إلى +125 | ??C |
الخصائص الوظيفية الرئيسية
| الخصائص | المواصفات |
|---|---|
| جهد إزاحة المدخلات | 5.0 mV (maximum, at 3V) |
| تيار تحيز الإدخال | 1.0 pA (maximum, at 25??C) |
| Common-Mode Rejection Ratio (CMRR) | 60 dB (minimum) |
| معدل الدوران | 0.6 V/??s (typical) |
| تيار الإخراج | 20 mA (minimum, into 500?? load) |
Advantages Over Alternative Amplification Solutions
The LMV321IDBVR outperforms larger op-amps and higher-power alternatives, starting with its ultra-compact SOT-23-5 package (2.9mm??2.8mm)??60% smaller than DIP-8 op-amps. This makes it indispensable for space-constrained devices like wireless earbuds and smartwatch sensor modules. “We reduced PCB area by 40% in our fitness trackers by switching to this tiny op-amp,” notes a senior engineer at a leading wearable technology manufacturer.
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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 250??A quiescent current consumes 75% less power than general-purpose op-amps (1mA+), extending battery life in IoT sensors by up to 40%.
Unlike low-voltage op-amps with limited drive capability, its 20mA output current directly powers LEDs and small loads, reducing external components in indicator circuits. Its -40??C to +125??C temperature range also ensures reliability in harsh environments, from cold outdoor sensors to warm body-worn devices??outperforming commercial-grade op-amps limited to 0??C?C70??C.
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Unity-gain stability further simplifies design by eliminating the need for external compensation components, lowering BOM costs in high-volume production of consumer electronics and medical devices.
Typical Applications of LMV321IDBVR
The LMV321IDBVR excels in low-voltage, compact systems requiring single-channel amplification. Key use cases include:
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- Internet of Things (IoT) (wireless sensor nodes, battery-powered data loggers, smart home micro-sensors)
- 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 micro-controllers)
Texas Instruments?? Expertise in Analog Design
As a Texas Instruments product, the LMV321IDBVR 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 and reliability has made TI a trusted partner for brands like Fitbit, Apple, and Medtronic, who rely on components like the LMV321IDBVR for their most compact and power-sensitive devices.
الأسئلة المتداولة (FAQ)
What is a single operational amplifier, and how does the LMV321IDBVR work?
A single op-amp is a standalone amplifier circuit designed to amplify weak analog signals. The LMV321IDBVR takes low-level signals from sensors (e.g., heart rate monitors, temperature sensors) and amplifies them to levels readable by microcontrollers. Its low-voltage design ensures compatibility with battery-powered devices, making it ideal for portable electronics needing compact, efficient signal processing.
Why is the 1.8V?C5.5V supply range important for battery-powered 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 and IoT sensors.
How does the SOT-23-5 package benefit ultra-compact designs?
The SOT-23-5??s tiny footprint (2.9mm??2.8mm) and thin profile (1.1mm) fit into the smallest PCBs, such as those in smartwatches and wireless earbuds. Its 5-pin design minimizes routing complexity, while surface-mount compatibility supports automated assembly??critical for high-volume production of consumer wearables and miniaturized medical devices where space is at a premium.
How does the 250??A quiescent current extend battery life?
Quiescent current is the power drawn when the op-amp is idle but powered. At 250??A, the LMV321IDBVR uses 75% less idle power than standard op-amps (1mA+). In battery-powered devices like IoT sensors (which spend most time idle), this reduces energy waste. For example, a wireless environmental sensor using this op-amp can operate for 16 months on a coin cell, compared to 10 months with a higher-power alternative.
Is the LMV321IDBVR suitable for medical wearable devices?
Yes. Its ultra-compact size (2.9mm??2.8mm) fits into body-worn devices, while its 250??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, blood oxygen) without distortion, supporting reliable patient monitoring.