Overview
The OPA2349EA/3K, produced by Texas Instruments, is a dual ultra-low power operational amplifier. It is designed to provide a 70kHz bandwidth while consuming only 1µA of quiescent current per amplifier. This rail-to-rail input and output amplifier is specifically tailored for battery-powered applications, ensuring wide dynamic range and superior performance even in low battery situations. The OPA2349 is available in SOT23-8 and SO-8 surface-mount packages, making it ideal for high-density applications such as PCMCIA cards, battery packs, and portable instruments.
Key Specifications
| Parameter | Condition | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Supply Voltage Range | 1.8 | 5.5 | V | ||
| Quiescent Current (per amplifier) | IO = 0 | 1 | 2 | µA | |
| Gain-Bandwidth Product | G = +1 | 70 | kHz | ||
| Input Bias Current | 10 | pA | |||
| Output Drive Current | 8 | mA | |||
| Open-Loop Gain | RL = 10kΩ, VS = +5.5V | 74 | 90 | dB | |
| Operating Temperature Range | –40 | 70 | °C | ||
| Storage Temperature Range | –65 | 150 | °C |
Key Features
- Ultra-low power consumption: 1µA quiescent current per amplifier.
- Rail-to-rail input and output capability.
- Unity-gain stable without external compensation.
- Low input bias current: 10pA (max).
- Wide supply range: 1.8V to 5.5V.
- Input range extends 200mV beyond the power-supply rails.
- Output swings to within 350mV of the rails.
- High open-loop gain: 90dB.
- Available in miniature SOT23-8 and SO-8 surface-mount packages.
Applications
- Battery packs and power supplies.
- Portable phones, pagers, and cameras.
- Solar-powered systems.
- Smoke, gas, and fire detection systems.
- Remote sensors.
- PCMCIA cards.
- Driving analog-to-digital (A/D) converters.
- Micro-power filters.
Q & A
- What is the quiescent current of the OPA2349?
The quiescent current of the OPA2349 is 1µA per amplifier.
- What is the gain-bandwidth product of the OPA2349?
The gain-bandwidth product of the OPA2349 is 70kHz.
- What is the input bias current of the OPA2349?
The input bias current of the OPA2349 is 10pA (max).
- What is the operating temperature range of the OPA2349?
The operating temperature range of the OPA2349 is –40°C to +70°C.
- What are the typical applications of the OPA2349?
The OPA2349 is typically used in battery packs, portable devices, solar-powered systems, and remote sensors among other applications.
- What packages are available for the OPA2349?
The OPA2349 is available in SOT23-8 and SO-8 surface-mount packages.
- Is the OPA2349 unity-gain stable?
Yes, the OPA2349 is unity-gain stable without requiring external compensation.
- What is the output drive current of the OPA2349?
The output drive current of the OPA2349 is 8mA.
- What is the open-loop gain of the OPA2349?
The open-loop gain of the OPA2349 is 90dB.
- Does the OPA2349 support rail-to-rail input and output?
Yes, the OPA2349 supports rail-to-rail input and output.
