Overview
The OPA349NA/3K is an ultra-low power operational amplifier produced by Texas Instruments. It is designed for battery-powered applications and offers a unique combination of low power consumption and high performance. The amplifier features a 70kHz bandwidth with a quiescent current of only 1µA, making it ideal for applications where power efficiency is crucial. The OPA349NA/3K is a rail-to-rail input and output amplifier, allowing the input common-mode voltage range to extend 200mV beyond the power-supply rails and the output to swing within 350mV of the rails, thus maintaining a wide dynamic range. It is unity-gain stable and does not require external compensation to achieve its wide bandwidth.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package/Case | SOT-23-5 | - |
| Supply Voltage Range | 1.8V to 5.5V | V |
| Quiescent Current | 1µA | A |
| Bandwidth | 70kHz | kHz |
| Slew Rate | 0.02V/µs | V/µs |
| Input Bias Current | 0.5pA (typ), 10pA (max) | A |
| Input Offset Voltage | 2mV | mV |
| Output Current per Channel | 8mA | mA |
| Operating Temperature Range | 0°C to +70°C | °C |
| RoHS Compliance | Yes | - |
Key Features
- Rail-to-Rail Input and Output: The amplifier can handle input common-mode voltage ranges extending 200mV beyond the power-supply rails and output swings within 350mV of the rails, ensuring a wide dynamic range.
- Ultra-Low Power Consumption: With a quiescent current of only 1µA, it is highly suitable for battery-powered applications.
- Unity-Gain Stable: No external compensation is required to achieve the wide bandwidth of 70kHz.
- Low Input Bias Current: Typically 0.5pA, allowing the use of large source and feedback resistors.
- Compact Packaging: Available in miniature SOT23-5, SC70, and SO-8 surface-mount packages, ideal for high-density applications.
- RoHS Compliance: Lead-free and compliant with current environmental standards.
Applications
- Battery Packs and Power Supplies: Suitable for applications where power efficiency is critical.
- Portable Electronics: Ideal for devices such as phones, pagers, and cameras.
- Solar-Powered Systems: Can be used in solar-powered devices due to its low power consumption.
- Smoke, Gas, and Fire Detection Systems: Used in safety and monitoring systems.
- Remote Sensors: Suitable for remote sensing applications due to its low power and compact size.
- PCMCIA Cards and Portable Instruments: Ideal for high-density applications.
- Driving Analog-to-Digital (A/D) Converters: Can be used to drive A/D converters efficiently.
Q & A
- What is the typical quiescent current of the OPA349NA/3K?
The typical quiescent current is 1µA.
- What is the bandwidth of the OPA349NA/3K?
The bandwidth is 70kHz.
- What is the input bias current of the OPA349NA/3K?
The input bias current is typically 0.5pA and up to 10pA maximum.
- What is the operating temperature range of the OPA349NA/3K?
The operating temperature range is from 0°C to +70°C.
- Is the OPA349NA/3K RoHS compliant?
Yes, the OPA349NA/3K is RoHS compliant.
- What are the available package types for the OPA349NA/3K?
The available package types include SOT23-5, SC70, and SO-8.
- What is the slew rate of the OPA349NA/3K?
The slew rate is 0.02V/µs.
- What is the output current per channel of the OPA349NA/3K?
The output current per channel is 8mA.
- Can the OPA349NA/3K be used in high-density applications?
Yes, it is suitable for high-density applications due to its compact packaging.
- What are some common applications of the OPA349NA/3K?
Common applications include battery packs, portable electronics, solar-powered systems, and remote sensors.
