Overview
The OPA349NA/3KG4 is an ultra-low power operational amplifier produced by Texas Instruments. It is part of the OPA349 series, which includes rail-to-rail input and output amplifiers designed specifically for battery-powered applications. These amplifiers offer a 70kHz bandwidth with an extremely low quiescent current of 1µA, making them ideal for power-sensitive designs. The OPA349NA/3KG4 is unity-gain stable and does not require external compensation, ensuring wide bandwidth without additional components.
Key Specifications
| Parameter | Condition | Min | Max | Units | |
|---|---|---|---|---|---|
| Input Offset Voltage (VOS) | VS = 5V, VCM = 2.5V | ±2 | ±10 | ±13 | mV |
| Input Bias Current | 10 | pA | |||
| Gain-Bandwidth Product (GBW) | G = +1 | 70 | kHz | ||
| Open-Loop Voltage Gain (AOL) | RL = 10kΩ, VS = +5.5V | 74 | 90 | 90 | dB |
| Output Current | ±8 | ±10 | mA | ||
| Supply Voltage Range (VS) | +1.8 | +5.5 | V | ||
| Quiescent Current (IQ) | IO = 0 | 1 | 1 | 2 | µA |
| Operating Temperature Range | 0 | +70 | °C | ||
| Package Type | SOT-23 |
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 voltage range: 1.8V to 5.5V.
- High open-loop gain: 90dB.
- Output drive current: ±8mA.
- Miniature packages: SOT23-5, SC70, 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 OPA349NA/3KG4?
The quiescent current is 1µA per amplifier.
- What is the gain-bandwidth product of the OPA349NA/3KG4?
The gain-bandwidth product is 70kHz.
- Is the OPA349NA/3KG4 unity-gain stable?
Yes, it is unity-gain stable without requiring external compensation.
- What is the input bias current of the OPA349NA/3KG4?
The input bias current is 10pA (max).
- What is the supply voltage range for the OPA349NA/3KG4?
The supply voltage range is from 1.8V to 5.5V.
- What is the output drive current of the OPA349NA/3KG4?
The output drive current is ±8mA.
- What are the available package types for the OPA349NA/3KG4?
The available package types include SOT23-5, SC70, and SO-8 surface-mount packages.
- What is the operating temperature range for the OPA349NA/3KG4?
The operating temperature range is from 0°C to +70°C.
- What are some common applications for the OPA349NA/3KG4?
Common applications include battery packs, portable devices, solar-powered systems, and remote sensors.
- Does the OPA349NA/3KG4 have rail-to-rail input and output capability?
Yes, it has rail-to-rail input and output capability.
